CN114892429A - Cellulose fiber dyeing method - Google Patents
Cellulose fiber dyeing method Download PDFInfo
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- CN114892429A CN114892429A CN202210634451.5A CN202210634451A CN114892429A CN 114892429 A CN114892429 A CN 114892429A CN 202210634451 A CN202210634451 A CN 202210634451A CN 114892429 A CN114892429 A CN 114892429A
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- 238000004043 dyeing Methods 0.000 title claims abstract description 76
- 229920003043 Cellulose fiber Polymers 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 40
- 239000000975 dye Substances 0.000 claims abstract description 31
- 239000003607 modifier Substances 0.000 claims abstract description 27
- 238000005406 washing Methods 0.000 claims abstract description 23
- 239000000835 fiber Substances 0.000 claims abstract description 19
- 239000000985 reactive dye Substances 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 150000001768 cations Chemical class 0.000 claims abstract description 13
- 238000012986 modification Methods 0.000 claims abstract description 13
- 230000004048 modification Effects 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims abstract description 13
- 238000001035 drying Methods 0.000 claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 7
- 239000012190 activator Substances 0.000 claims abstract description 3
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 125000002091 cationic group Chemical group 0.000 claims description 19
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 7
- JGVZJRHAZOBPMW-UHFFFAOYSA-N 1,3-bis(dimethylamino)propan-2-ol Chemical compound CN(C)CC(O)CN(C)C JGVZJRHAZOBPMW-UHFFFAOYSA-N 0.000 claims description 6
- 229920000742 Cotton Polymers 0.000 claims description 6
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 238000004321 preservation Methods 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 4
- LRWZZZWJMFNZIK-UHFFFAOYSA-N 2-chloro-3-methyloxirane Chemical compound CC1OC1Cl LRWZZZWJMFNZIK-UHFFFAOYSA-N 0.000 claims description 3
- 230000003213 activating effect Effects 0.000 claims description 3
- 238000004821 distillation Methods 0.000 claims description 3
- 239000005457 ice water Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000002985 plastic film Substances 0.000 claims description 3
- 229920006255 plastic film Polymers 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 2
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 2
- 244000025254 Cannabis sativa Species 0.000 claims description 2
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 claims description 2
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 claims description 2
- 244000082204 Phyllostachys viridis Species 0.000 claims description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 2
- 229920000297 Rayon Polymers 0.000 claims description 2
- 239000011425 bamboo Substances 0.000 claims description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 2
- 239000000920 calcium hydroxide Substances 0.000 claims description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 2
- 235000009120 camo Nutrition 0.000 claims description 2
- 235000005607 chanvre indien Nutrition 0.000 claims description 2
- 239000011487 hemp Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 239000000344 soap Substances 0.000 claims description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 2
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims 1
- 230000000630 rising effect Effects 0.000 claims 1
- 238000010923 batch production Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000004744 fabric Substances 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 239000003513 alkali Substances 0.000 description 4
- 238000006467 substitution reaction Methods 0.000 description 4
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 3
- 229920002678 cellulose Polymers 0.000 description 3
- 239000001913 cellulose Substances 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical group N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 125000000129 anionic group Chemical group 0.000 description 2
- 239000012752 auxiliary agent Substances 0.000 description 2
- -1 carbenium ion Chemical class 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 239000012043 crude product Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000006266 etherification reaction Methods 0.000 description 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 2
- 229910017053 inorganic salt Inorganic materials 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 238000010534 nucleophilic substitution reaction Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- IFDLXKQSUOWIBO-UHFFFAOYSA-N 1,3-dichloropropan-1-ol Chemical compound OC(Cl)CCCl IFDLXKQSUOWIBO-UHFFFAOYSA-N 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 239000000982 direct dye Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 239000012434 nucleophilic reagent Substances 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- 235000011118 potassium hydroxide Nutrition 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000007142 ring opening reaction Methods 0.000 description 1
- 239000008149 soap solution Substances 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000000984 vat dye Substances 0.000 description 1
Images
Classifications
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/38—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using reactive dyes
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/0032—Determining dye recipes and dyeing parameters; Colour matching or monitoring
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/655—Compounds containing ammonium groups
- D06P1/66—Compounds containing ammonium groups containing quaternary ammonium groups
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
- D06P3/58—Material containing hydroxyl groups
- D06P3/60—Natural or regenerated cellulose
- D06P3/66—Natural or regenerated cellulose using reactive dyes
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
- D06P5/22—Effecting variation of dye affinity on textile material by chemical means that react with the fibre
- D06P5/225—Aminalization of cellulose; introducing aminogroups into cellulose
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Coloring (AREA)
Abstract
The invention relates to the technical field of fiber modification dyeing, in particular to a cellulose fiber dyeing method, which comprises the steps of padding cellulose fibers with a modification solution, stacking the cellulose fibers in a cold pile, washing the cellulose fibers with water, drying the cellulose fibers, and dyeing the cellulose fibers with reactive dye; wherein, the modifying liquid comprises the following components by weight: 3.6-6.8 percent of cation modifier (owf), 1.2-2.1 percent of activator (owf) and 3-5 g/L of penetrating agent. According to the cellulose fiber dyeing method provided by the invention, the cation modifier is adopted to modify the cellulose fiber under the cold batch process, and then the reactive dye is used for dyeing, so that the dye consumption can be reduced by 35-50% and the washing water consumption can be reduced by 60-90% compared with the traditional dyeing; compared with the traditional dyeing process after cation modification, the method reduces the dye consumption by 10-20%, can obviously shorten the time for dyeing and dyeing, changes the original 60 minutes into 15-20 minutes, and improves the production efficiency.
Description
Technical Field
The invention relates to the technical field of fiber modification dyeing, in particular to a cellulose fiber dyeing method.
Background
The most important dye of cellulose fiber fabrics represented by cotton is reactive dye, which is a reactive dye, and the reactive group on the dye molecule reacts with the hydroxyl on the cellulose to be chemically bonded with the cellulose, so that the bonding fastness is high. However, hydroxyl groups on macromolecular side chains of cellulose fibers make the fabric fibers electronegative in solution, and water-soluble groups contained in the reactive dyes exist in the dye liquor in an anionic form, so that certain charge obstacles need to be overcome when the dyes are adsorbed to the fibers. In order to solve the problem, in the dyeing production, a large amount of inorganic salt, such as anhydrous sodium sulphate or salt, must be added into the dyeing liquor to improve the dye uptake, and a large amount of saline-alkali discharge can cause serious environmental problems such as water and soil salinization.
In the prior art, in order to reduce the dosage of subsequent dyeing salt, fabric is generally modified by cationization, wherein the most obvious modification effect is modification by an immersion method, but the method is to place the fabric in an alkaline solution of a modifier and modify the fabric at 60-80 ℃ or even higher temperature, but the modifier has low effective utilization rate, and stimulated gas release and water and energy consumption are generated in the reaction process, so that the inherent problem of reactive dye dyeing is solved and a new problem is brought. How to improve the effective utilization rate of the novel environment-friendly auxiliary agent and reduce the using amount of the novel environment-friendly auxiliary agent, save energy and water and ensure the dyeing color yield and color fastness is a key problem to be solved in salt-free dyeing.
Disclosure of Invention
Aiming at the technical problems that a large amount of salt and alkali are needed in reactive dye dyeing, the invention provides the cellulose fiber dyeing method, which can realize salt-free and alkali-free dyeing during cellulose fiber reactive dye dyeing, reduce the using amount of water, reduce the energy consumption of steam and the like, improve the utilization rate and dyeing depth of dye, save energy and reduce consumption without using inorganic salt and alkali in the dyeing process.
The invention provides a cellulose fiber dyeing method, which comprises the steps of padding cellulose fibers with a modification solution, stacking in a cold pile, washing with water, drying and dyeing with reactive dye; wherein, the modifying liquid comprises the following components by weight: 3.6-6.8 percent of cation modifier (owf), 1.2-2.1 percent of activator (owf) and 3-5 g/L of penetrating agent.
Further, the cellulose fiber is one or more of cotton fiber, viscose fiber, hemp fiber, bamboo fiber and modal fiber.
Furthermore, the padding dye liquor is subjected to two-dipping and two-rolling, the rolling residual rate of a padder is 70-80%, and the vehicle speed is 40-50 m/min.
Further, the cold stacking method comprises the step of stacking the cellulose fibers after wrapping and sealing the cellulose fibers with a plastic film, wherein the stacking temperature is 25-30 ℃, and the stacking time is 10-16 hours.
Furthermore, the water washing temperature is 50-60 ℃, the drying temperature is 80-90 ℃, and the drying time is 5-10 min.
Further, the method for dyeing by using the reactive dye comprises the following steps:
(1) putting cellulose fiber into reactive dye liquor;
(2) heating the dyeing to the dyeing temperature, and carrying out heat preservation and constant-temperature dyeing;
(3) and after dyeing, carrying out first washing, soaping, second washing and drying.
Further, in the step (2), the heating rate is 1.5 ℃/min, the constant-temperature dyeing temperature is 60 ℃, and the dyeing time is 15-20 min.
Further, in the step (3), the water temperature of the first washing and the second washing is 85-95 ℃, and the washing time is 2-5 min; the soaping water temperature is 90-95 ℃, the soaping time is 2-5 min, and the using amount of the soap liquid is 1-2 g/L.
Further, the preparation method of the cation modifier is as follows,
(1) putting 1, 3-di (dimethylamino) -2-propanol into a three-mouth bottle, stirring, introducing ice water for cooling, and adding hydrochloric acid;
(2) dropwise adding epoxy chloropropane into a three-mouth bottle, controlling the dropwise adding time to be 1h, keeping the materials in the kettle in a turbid state after the dropwise adding is finished, and carrying out heat preservation reaction for 6-24 h;
(3) and (3) carrying out reduced pressure distillation to obtain a finished product of the cation modifier, wherein the cation modifier has the following molecular formula:
the synthetic route of the cation modifier is as follows:
the mechanism is as follows:
the dinitrogen atom on the 1, 3-di (dimethylamino) -2-propanol has a lone pair electron, and the dinitrogen atom serving as a nucleophilic reagent can attack a carbenium ion on the epichlorohydrin to generate a special affinity substitution reaction, so that a C-O bond is broken while a C-N bond is formed, and the lone pair electron on the oxygen atom is combined with a free hydrogen ion to form a hydroxyl bond, thereby obtaining a target product. In order to avoid the phenomenon that the alkalinity is too strong to cause the closed loop of a reaction product to form an epoxy bond, and the epoxy bond and 1, 3-di (dimethylamino) -2-propanol are subjected to nucleophilic substitution again to form a long-chain byproduct, the first step of the reaction synthesis is to react the 1, 3-di (dimethylamino) -2-propanol and hydrochloric acid to prepare hydrochloride, reduce the alkalinity of a system and then react with epoxy chloropropane to improve the purity of a target product.
Further, the activating agent is one or more of sodium hydroxide, potassium hydroxide, calcium hydroxide, sodium bicarbonate and sodium carbonate.
The modification mechanism of the invention is as follows: the invention adds an activating agent into the modifying liquid to activate the cationic modifying agent, and the cellulose fiber is directly dyed in a dye bath after the cellulose fiber is subjected to the reaction treatment of the activated cationic modifying agent. By utilizing a cold batch process, the product is activated and then undergoes etherification reaction with the hydroxyl of the fiber to generate the active fiber with an epoxy structure, and the reaction formula is as follows:
the epoxy group of the active fiber can react with groups with active hydrogen, such as hydroxyl, carboxyl, amino and the like on dye molecules to form a stable chemical bond. The cationic modifier of the modifying solution has dication charges, and after the cationic modifier is introduced to the cellulose fibers, the electric neutralization probability of the cellulose fibers and dye molecules is increased, and compared with the traditional dyeing, the electric neutralization probability is increased by two times. The reactive groups and the cationic groups of the reactive cellulose fibers can improve the dyeing performance of the reactive dye, so that the dye-uptake and the color depth of the dye are improved, and the dyeing fastness is not reduced.
The cationic modifier provided by the invention is different from a single cationic modifier in the prior art, the single cationic modifier modified cellulose fiber in the prior art only has single cationic charge and no active reactive group, cannot form a stable chemical bond between the cellulose fiber and dye molecules, is only combined with negative charge dye molecules through the ionic bond by the single cationic property, and has lower combination stability and lower combination probability than active cellulose fiber.
The modified cellulose fiber is not combined with the original van der Waals force and hydrogen bond after contacting with the dye during dyeing, but forms stable chemical bond and ionic bond with the dye. The dyeing by the chemical combination mode ensures that the dye is more firm and uniform. Under the condition of alkaline active agent, the cationic modifier and the hydroxyl on the cellulose have nucleophilic substitution reaction to form modified fiber fabric with active reactive groups and cationic charges. The normal cellulose fiber has negative charge in a dye bath, most dyes (reactive dyes, direct dyes, vat dye leuco bodies and the like) for dyeing cotton are anionic in the dye bath, the dye-uptake rate is not high due to electrostatic repulsion, active reactive groups and positive charge cations are introduced, so that the active groups of the cellulose fiber and groups with active hydrogen, such as hydroxyl, carboxyl, amino and the like on dye molecules, are subjected to ring-opening etherification reaction, and meanwhile, the positive charges on the cellulose fiber change the original electrostatic repulsion into electrostatic attraction to ensure that chemical bonds between the dye molecules and the cotton fiber are reacted more quickly and sufficiently, and the dye-uptake rate of the dyes is improved.
The method for dyeing the cellulose fibers has the advantages that the cationic modifier is adopted to modify the cellulose fibers under the cold batch process, and then the cellulose fibers are dyed by the reactive dye, so that the dye consumption can be reduced by 35-50% and the washing water consumption can be reduced by 60-90% compared with the traditional dyeing method; compared with the traditional dyeing process after cation modification, the dye consumption is reduced by 10-20%, the time for printing, dyeing and coloring can be obviously shortened from the original 60 minutes to 15-20 minutes, and the working time of a machine and the labor intensity of manpower are reduced.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a graph of a dyeing process according to example 2 of the present invention.
FIG. 2 is a graph of a dyeing process of comparative example 1 according to an embodiment of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The preparation method of the cation modifier comprises the following steps:
(1) putting 1, 3-bis (dimethylamino) -2-propanol into a three-necked bottle, starting stirring, introducing ice water for cooling, adding hydrochloric acid, neutralizing with acid and alkali to release a large amount of heat, and cooling to prepare amine salt;
(2) dropwise adding the weighed epichlorohydrin into a three-mouth bottle, controlling the dropwise adding time to be 1h, keeping the material in the kettle in a turbid state after the dropwise adding is finished, keeping the temperature and reacting for 15 h, and obtaining a crude product after the reaction is finished;
(3) removing epichlorohydrin and 1, 3-dichloropropanol in the crude product by reduced pressure distillation to obtain a finished product of the cationic modifier, and commercially naming the finished product as the cationic modifier K67.
Example 2
The cellulose fiber dyeing method comprises the following steps:
(1) placing the pure cotton cellulose fiber knitted fabric into the modification solution, and performing two-dipping and two-rolling by a small padder; the formula of the modified liquid is as follows: cationic modifier K675.2% (owf), caustic soda 1.5% (owf) and non-ionic penetrant 5 g/L;
(2) placing the cellulose fiber subjected to padding treatment into a plastic film, and stacking at the stacking temperature of 25-30 ℃ for 12 hours;
(3) washing the piled cellulose fibers with water at the temperature of 50-60 ℃ until the cellulose fibers are neutral; drying at the temperature of 80-90 ℃ for 8min to obtain modified cellulose fibers;
(4) placing the modified cellulose fiber into a dye liquor, wherein the using amount of a reactive dye in the dye liquor is 1% (owf), and the bath ratio is 1: 20;
(5) heating the dye liquor to 60 ℃ at the heating rate of 1.5 ℃/min, and dyeing at constant temperature for 15-20 min;
(6) after dyeing, carrying out first washing, soaping, second washing and drying, wherein the water temperature of the first washing and the second washing is 85-95 ℃, and the washing time is 4 min; soaping at 90 deg.C for 5min, and drying to obtain the final product, wherein the soap solution amount is 2 g/L. The specific dyeing process curve is shown in figure 1.
Comparative example 1
Comparative example 1 differs from example 2 in that the fabric was not modified with a cationic modifier and a conventional reactive dye dyeing process was used. The specific dyeing process curve is shown in figure 2.
Comparative example 2
Comparative example 2 differs from example 2 in that the cationic modifier used was a monocationic quaternary ammonium salt cationic modifier, specifically under the trade name CR-2000 (dow chemical company, usa), and the rest of the conditions were the same.
The concrete conditions of the processes of the examples and the comparative examples and the detection result of the color fastness of the dyed fabrics are shown in the table 1.
Table 1 examples and comparative examples active dyeing process specific conditions and dyed fabric color fastness detection results
As can be seen from Table 1, the salt-free and alkali-free dyeing is realized in the dyeing process of the example 2, the color yield and the color fastness of the dyed fabric are greatly improved, and compared with the existing single-cation quaternary ammonium salt cation modifier, the dyeing method of the invention shortens the dyeing time, saves energy and reduces consumption, improves the apparent color yield (K/S value) of the fabric, and greatly improves the dyeing rate and saves the dye consumption.
Although the present invention has been described in detail by referring to the drawings in connection with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions are within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention.
Claims (10)
1. A cellulose fiber dyeing method is characterized by comprising the steps of padding cellulose fibers with a modification solution, stacking the cellulose fibers in a cold pile, washing the cellulose fibers with water, drying the cellulose fibers and dyeing the cellulose fibers with reactive dye; wherein, the modifying liquid comprises the following components by weight: 3.6-6.8 percent of cation modifier (owf), 1.2-2.1 percent of activator (owf) and 3-5 g/L of penetrating agent.
2. The method of dyeing cellulose fibers according to claim 1, wherein the cellulose fibers are one or more of cotton fibers, viscose fibers, hemp fibers, bamboo fibers, modal fibers.
3. The cellulose fiber dyeing method according to claim 1, characterized in that the padding dye liquor is two-padding and two-rolling, the padder residual rate is 70-80%, and the vehicle speed is 40-50 m/min.
4. The cellulose fiber dyeing method according to claim 1, wherein the cold-stacking method comprises wrapping and sealing cellulose fibers with a plastic film, and stacking at 25-30 ℃ for 10-16 h.
5. The cellulose fiber dyeing method according to claim 1, characterized in that the washing temperature is 50-60 ℃, the drying temperature is 80-90 ℃, and the drying time is 5-10 min.
6. The method of dyeing cellulosic fibers of claim 1 wherein the reactive dye dyeing process comprises the steps of:
(1) putting cellulose fiber into reactive dye liquor;
(2) heating the dyeing to the dyeing temperature, and carrying out heat preservation and constant-temperature dyeing;
(3) and after dyeing, carrying out first washing, soaping, second washing and drying.
7. The cellulose fiber dyeing method according to claim 6, characterized in that in the step (2), the temperature rising rate is 1.5 ℃/min, the constant temperature dyeing temperature is 60 ℃, and the dyeing time is 15-20 min.
8. The cellulose fiber dyeing method according to claim 6, characterized in that in the step (3), the water temperature of the first washing and the second washing is 85-95 ℃, and the washing time is 2-5 min; the soaping water temperature is 90-95 ℃, the soaping time is 2-5 min, and the using amount of the soap liquid is 1-2 g/L.
9. The method of dyeing cellulosic fibers of claim 1 wherein the cationic modifier is prepared by a process comprising,
(1) putting 1, 3-di (dimethylamino) -2-propanol into a three-mouth bottle, stirring, introducing ice water for cooling, and adding hydrochloric acid;
(2) dropwise adding epoxy chloropropane into a three-mouth bottle, controlling the dropwise adding time to be 1h, keeping the materials in the kettle in a turbid state after the dropwise adding is finished, and carrying out heat preservation reaction for 6-24 h;
(3) and (5) carrying out reduced pressure distillation to obtain a finished product of the cation modifier.
10. The method of dyeing cellulosic fibers of claim 1 wherein the activating agent is one or more of sodium hydroxide, potassium hydroxide, calcium hydroxide, sodium bicarbonate, sodium carbonate.
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