CN104927094A - High-starch-content polyvinyl alcohol-blended full-degradable plastic film and preparation method thereof - Google Patents
High-starch-content polyvinyl alcohol-blended full-degradable plastic film and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a high-starch-content polyvinyl alcohol-blended full-degradable plastic film. The high-starch-content polyvinyl alcohol-blended full-degradable plastic film is characterized by being prepared from the following raw materials in parts by weight: 68 to 72 parts of corn starch, 7 to 9 parts of nano montmorillonite, 0.6 to 0.7 part of peanut oil, 1.2 to 1.4 parts of tetrabutyl titanate, 12 to 14 parts of ramie bone, 20 to 25 parts of polyvinyl alcohol, 8 to 10 parts of polylactic acid, 13 to 15 parts of tributyl O-acetylcitrate, 2.5 to 4 parts of trialkylphosphite, 1.5 to 2.5 parts of glyceryl monostearate, 3 to 4 parts of ethanol, 2 to 3 parts of nano silicon dioxide and 2 to 3 parts of chitosan. The high-starch-content polyvinyl alcohol-blended full-degradable plastic film is combined with the characteristics of starch and polyvinyl alcohol, the starch content is high, the high-starch-content polyvinyl alcohol-blended full-degradable plastic film has good plasticity and processability, the ramie bone ingredient is also added, the production cost is reduced, the prepared product not only can meet the requirement on service strength, but can also meet the requirement of environmental protection on easy degradation, the process is easy to control, and industrialization can be realized.
Description
Technical field
The present invention relates to plastics film technical field, particularly a kind of high-content of starch with polyvinyl alcohol blending type Based Full-degradable Plastics Film and preparation method thereof.
Background technology
Because the minimizing day by day of petroleum resources causes cost increase, tempo slows down Macromolecular materials industry traditional at present, and meanwhile, the problem of environmental pollution that macromolecular material produces highlights day by day, causes the very big attention of society.Starch has cheapness compared with petrochemical materials, can regenerate, biodegradable, pollutes little and feature that is production process toxicological harmless.Starch causes the attention of many countries in the world in the development and utilization in bio-based degradable environment-friendly material field, and the existing degradable plastics utilizing starch base and derivative thereof to prepare accounts for more than 60% of whole degradable plastics.But starch is while raising plastics degradability, the decline of its physical and mechanical properties can be caused on the one hand, make its processing difficulties, also there is wetting ability on the other hand too strong, and the consistency between most of resins for universal use is very poor, cause the thin film mechanical performance made to decline to a great extent, block-water performance is poor, thus hinders the widespread use of starch plastic in industrialization promotion process.
Polyvinyl alcohol is a kind of broad-spectrum high molecular polymer, performance is between plastics and rubber, containing a large amount of polar group hydroxyls, toxicity is very low, molecular chain structure symmetry is regular, there is unique strong adherence, epithelium snappiness, smoothness, oil-proofness, solvent resistance, protective colloid, gas barrier performance and the water tolerance had through special processing, also there is certain biological degradability simultaneously, have in wet environment under bacterium existent condition and can resolve into water and carbonic acid gas completely in 6 months, it is Biodegradable Materials, but it is higher to degraded environmental requirement in degradation process, degradation speed is made still to seem relatively slow.
Ramie is the traditional fibre crop having distinct Chinese characteristics, and the long-term ramie planting area of China reaches about 200,000 hectares, and except ramie phloem extracts as except textile product, ramie boon is seldom utilized.The problems such as ramie boon utilization ratio is low, and process is difficult are governments at all levels and relevant department's question of common concern always, are also the problems that peasant is extremely concerned about.The by product that ramie core is processed as the large-scale production of ramie industry; important Biological resources; wherein rich cellulose, hemicellulose; its content of cellulose and the similar deciduous species of fibre shape; be the raw materials of desirable plant fiber tableware in theory, and it is rationally developed for raising ramie comprehensive value efficiently, promotes that ramie industry development is all significant.
Summary of the invention
The object of this invention is to provide a kind of high-content of starch with polyvinyl alcohol blending type Based Full-degradable Plastics Film and preparation method thereof.Use the starch of the surface hydrophobicity modification of high-content as matrix, coordinate and add the strongthener of ramie boon as starch base Based Full-degradable Plastics Film, thin film strength and waterproof, oil preventing performance can be improved, and cost is low, can not produce pollution; Add polyvinyl alcohol and poly(lactic acid), the acetyl tributyl citrate of appropriate ratio, the fusing point of polyvinyl alcohol can be reduced, be convenient to carry out blended with starch matrix, mechanical property and the water tolerance of film can be improved.
In order to realize object of the present invention, the present invention is by following scheme implementation:
High-content of starch with a polyvinyl alcohol blending type Based Full-degradable Plastics Film, be made up of the raw material of following weight part: W-Gum 68-72, nano imvite 7-9, peanut oil 0.6-0.7, tetrabutyl titanate 1.2-1.4, ramie boon 12-14, polyvinyl alcohol 20-25, poly(lactic acid) 8-10, acetyl tributyl citrate 13-15, tris phosphite 2.5-4, single stearic acid glycerine lipoprotein 1.5-2.5, ethanol 3-4, nano silicon 2-3, chitosan 2-3;
A kind of high-content of starch of the present invention with polyvinyl alcohol blending type Based Full-degradable Plastics Film, be made up of following concrete steps:
(1) baking oven is put into after being mixed with nano imvite by W-Gum, take out after dry 120 minutes under the condition of 130 DEG C, (controlling bath temperature is 30 DEG C after being cooled to room temperature, mixed powder to be utilized sonic oscillation 30-40 minute, ultrasonic power is 100W), then mixed powder is transferred in stirring tank, add tetrabutyl titanate, control temperature is 75 DEG C, after stirring 15 minutes with the speed of 1500 revs/min, continue to add peanut oil, stir 15 minutes, finally take out and put into baking oven, the dry mixed powder namely obtaining surface hydrophobicity process for 60 minutes under the condition of 120 DEG C,
(2) 80-100 object powder is made after the drying of ramie boon through corase grind, fine grinding, then put into nano grinder and be ground into nanoscale powder, mix with nano silicon, chitosan again, kneader is put into after mixing, temperature control 130 DEG C, mediate 20 minutes, release cooling, obtain ramie boon and strengthen material;
(3) mixed powder of surface hydrophobicity modification step (1) obtained mixes with single stearic acid glycerine lipoprotein, ethanol, by colloidal mill dispersion 60-90 minute, then the ramie boon enhancing material that step (2) obtains is added, by in dual-screw pelletizer, melt extrude granulation under the condition of control temperature 170-180 DEG C, obtain the starch masterbatch that diameter is 6mm;
(4) after starch masterbatch, polyvinyl alcohol, poly(lactic acid), acetyl tributyl citrate and all the other remaining components that step (3) obtains being mixed at normal temperatures; join in single screw extrusion machine; control temperature carries out hot-melt extruded Blown Film under the processing temperature of 170-180 DEG C, last qualitative rolling, packs and get final product.
The invention has the beneficial effects as follows: after the present invention makes film to starch, the problem of undercapacity carries out modification, hydrophobizing surface process is carried out by after starch, nano imvite mixing, sonic oscillation makes the particle diameter of starch decline, specific surface area increases, tetrabutyl titanate and hydrophobizing agent peanut oil effectively shield starch surface hydroxyl, form high hydrophobic layer; Simultaneously nano imvite has good gas barrier property, heat-resisting, wear-resisting, intensity is high; Again silicon-dioxide, chitosan being made strongthener after mixing with ramie boon adds in the manufacture of product, can thin film strength, has good water-fast, oil resistance; After finally being mixed with poly(lactic acid), acetyl tributyl citrate by polyvinyl alcohol, the fusing point of polyvinyl alcohol can be reduced, and then better mix with starch masterbatch, improve the mechanical property of product.
The present invention is in conjunction with the feature of starch and polyvinyl alcohol, starch content is high, there is good plasticity-and processing characteristics, also added ramie boon composition, reduce production cost, the product prepared, the demand of working strength can be reached, can meet again the ecological requirements of easily degraded, process is easy to control, and can realize industrialization.
Specific embodiments
Below by specific examples, the present invention is described in detail.
High-content of starch with a polyvinyl alcohol blending type Based Full-degradable Plastics Film, be made up of the raw material of following weight part (kilogram): W-Gum 68, nano imvite 7, peanut oil 0.6, tetrabutyl titanate 1.2, ramie boon 12, polyvinyl alcohol 20, poly(lactic acid) 8, acetyl tributyl citrate 13, tris phosphite 2.5, single stearic acid glycerine lipoprotein 1.5, ethanol 3, nano silicon 2, chitosan 2;
A kind of high-content of starch of the present invention with polyvinyl alcohol blending type Based Full-degradable Plastics Film, be made up of following concrete steps:
(1) baking oven is put into after being mixed with nano imvite by W-Gum, take out after dry 120 minutes under the condition of 130 DEG C, (controlling bath temperature is 30 DEG C after being cooled to room temperature, mixed powder to be utilized sonic oscillation 30 minutes, ultrasonic power is 100W), then mixed powder is transferred in stirring tank, add tetrabutyl titanate, control temperature is 75 DEG C, after stirring 15 minutes with the speed of 1500 revs/min, continue to add peanut oil, stir 15 minutes, finally take out and put into baking oven, the dry mixed powder namely obtaining surface hydrophobicity process for 60 minutes under the condition of 120 DEG C,
(2) 80 object powder are made after the drying of ramie boon through corase grind, fine grinding, then put into nano grinder and be ground into nanoscale powder, mix with nano silicon, chitosan again, kneader is put into after mixing, temperature control 130 DEG C, mediate 20 minutes, release cooling, obtain ramie boon and strengthen material;
(3) mixed powder of surface hydrophobicity modification step (1) obtained mixes with single stearic acid glycerine lipoprotein, ethanol, 60 minutes are disperseed by colloidal mill, then the ramie boon enhancing material that step (2) obtains is added, by in dual-screw pelletizer, melt extrude granulation under the condition of control temperature 170-180 DEG C, obtain the starch masterbatch that diameter is 6mm;
(4) after starch masterbatch, polyvinyl alcohol, poly(lactic acid), acetyl tributyl citrate and all the other remaining components that step (3) obtains being mixed at normal temperatures; join in single screw extrusion machine; control temperature carries out hot-melt extruded Blown Film under the processing temperature of 170-180 DEG C, last qualitative rolling, packs and get final product.
Product of the present invention is carried out explanation test according to the standard of GB/T 20197-2006, and the soil through 4 months buries experiment, and biological degradation rate can reach 63.1%.Carry out Mechanics Performance Testing according to GB/T 1040.3-2006, transverse tensile strength is 25.87MPa, and elongation at break is 649.18%; Longitudinal tensile strength is 22.6 MPa, and elongation at break is 449.35%, conformance with standard.
Claims (2)
1. a high-content of starch with polyvinyl alcohol blending type Based Full-degradable Plastics Film; it is characterized in that, be made up of the raw material of following weight part: W-Gum 68-72, nano imvite 7-9, peanut oil 0.6-0.7, tetrabutyl titanate 1.2-1.4, ramie boon 12-14, polyvinyl alcohol 20-25, poly(lactic acid) 8-10, acetyl tributyl citrate 13-15, tris phosphite 2.5-4, single stearic acid glycerine lipoprotein 1.5-2.5, ethanol 3-4, nano silicon 2-3, chitosan 2-3.
2. according to claim 1 a kind of high-content of starch with polyvinyl alcohol blending type Based Full-degradable Plastics Film, it is characterized in that, be made up of following concrete steps:
(1) baking oven is put into after being mixed with nano imvite by W-Gum, take out after dry 120 minutes under the condition of 130 DEG C, (controlling bath temperature is 30 DEG C after being cooled to room temperature, mixed powder to be utilized sonic oscillation 30-40 minute, ultrasonic power is 100W), then mixed powder is transferred in stirring tank, add tetrabutyl titanate, control temperature is 75 DEG C, after stirring 15 minutes with the speed of 1500 revs/min, continue to add peanut oil, stir 15 minutes, finally take out and put into baking oven, the dry mixed powder namely obtaining surface hydrophobicity process for 60 minutes under the condition of 120 DEG C,
(2) 80-100 object powder is made after the drying of ramie boon through corase grind, fine grinding, then put into nano grinder and be ground into nanoscale powder, mix with nano silicon, chitosan again, kneader is put into after mixing, temperature control 130 DEG C, mediate 20 minutes, release cooling, obtain ramie boon and strengthen material;
(3) mixed powder of surface hydrophobicity modification step (1) obtained mixes with single stearic acid glycerine lipoprotein, ethanol, by colloidal mill dispersion 60-90 minute, then the ramie boon enhancing material that step (2) obtains is added, by in dual-screw pelletizer, melt extrude granulation under the condition of control temperature 170-180 DEG C, obtain the starch masterbatch that diameter is 6mm;
(4) after starch masterbatch, polyvinyl alcohol, poly(lactic acid), acetyl tributyl citrate and all the other remaining components that step (3) obtains being mixed at normal temperatures; join in single screw extrusion machine; control temperature carries out hot-melt extruded Blown Film under the processing temperature of 170-180 DEG C, last qualitative rolling, packs and get final product.
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| CN105830827A (en) * | 2016-03-31 | 2016-08-10 | 太仓市新华粮食生产专业合作社 | High strength degradable agricultural film |
| CN106279788A (en) * | 2016-08-26 | 2017-01-04 | 桐城市中汇塑业有限公司 | A kind of antibacterial deodouring plastics for refrigerator and preparation method thereof |
| CN118027462A (en) * | 2024-01-27 | 2024-05-14 | 江苏鑫世纪新材料科技有限公司 | Biodegradable starch-based PVA film and preparation method thereof |
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