CN1699508A - A kind of saline-alkali-resistant multifunctional water-retaining agent and preparation method thereof - Google Patents
A kind of saline-alkali-resistant multifunctional water-retaining agent and preparation method thereof Download PDFInfo
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- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 36
- 239000003513 alkali Substances 0.000 title claims abstract description 8
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229960000892 attapulgite Drugs 0.000 claims abstract description 23
- 229910052625 palygorskite Inorganic materials 0.000 claims abstract description 23
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229920002472 Starch Polymers 0.000 claims abstract description 12
- 239000004021 humic acid Substances 0.000 claims abstract description 12
- 239000008107 starch Substances 0.000 claims abstract description 12
- 235000019698 starch Nutrition 0.000 claims abstract description 12
- 239000003999 initiator Substances 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- 239000012153 distilled water Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 5
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical group [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical group C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 2
- 238000010298 pulverizing process Methods 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- 238000010792 warming Methods 0.000 claims 2
- 239000004160 Ammonium persulphate Substances 0.000 claims 1
- 239000004159 Potassium persulphate Substances 0.000 claims 1
- 150000003926 acrylamides Chemical class 0.000 claims 1
- 235000019395 ammonium persulphate Nutrition 0.000 claims 1
- 235000011187 glycerol Nutrition 0.000 claims 1
- 235000019394 potassium persulphate Nutrition 0.000 claims 1
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 abstract description 10
- 239000002689 soil Substances 0.000 abstract description 10
- 239000003431 cross linking reagent Substances 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000003337 fertilizer Substances 0.000 abstract 1
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract 1
- 238000006116 polymerization reaction Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 11
- 239000002131 composite material Substances 0.000 description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 5
- 239000005416 organic matter Substances 0.000 description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000008635 plant growth Effects 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000011573 trace mineral Substances 0.000 description 3
- 235000013619 trace mineral Nutrition 0.000 description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 229920002261 Corn starch Polymers 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000008120 corn starch Substances 0.000 description 2
- 229940099112 cornstarch Drugs 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 235000015097 nutrients Nutrition 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000004083 survival effect Effects 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 1
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 235000011148 calcium chloride Nutrition 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000008233 hard water Substances 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000015784 hyperosmotic salinity response Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229920005615 natural polymer Polymers 0.000 description 1
- 239000003895 organic fertilizer Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 238000009304 pastoral farming Methods 0.000 description 1
- 239000002504 physiological saline solution Substances 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 229920001592 potato starch Polymers 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 125000005372 silanol group Chemical group 0.000 description 1
- 229910052604 silicate mineral Inorganic materials 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 229920000247 superabsorbent polymer Polymers 0.000 description 1
- 239000004583 superabsorbent polymers (SAPs) Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
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- Fertilizers (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Graft Or Block Polymers (AREA)
Abstract
本发明公开了一种应用于高盐碱和贫瘠土壤植树造林用的保水剂及其制备方法。保水剂将凹凸棒土、淀粉、丙烯酰胺、腐植酸、交联剂和引发剂作为原料，采用交联聚合工艺研制而成的有机－无机杂化耐盐碱多功能保水剂。本发明在采用无机矿物凹凸棒提高耐盐碱的同时，又可以缓释有机微肥，从而赋予了保水剂的多功能性，满足了西部高盐碱和贫瘠土壤植树造林的要求。The invention discloses a water-retaining agent for afforestation in high salinity and barren soil and a preparation method thereof. The water retaining agent uses attapulgite, starch, acrylamide, humic acid, crosslinking agent and initiator as raw materials, and is an organic-inorganic hybrid salt-alkali-resistant multifunctional water retaining agent developed by cross-linking polymerization technology. The present invention adopts inorganic mineral attapulgite to improve saline-alkali resistance, and at the same time, it can slow-release organic micro-fertilizer, thereby endowing the water-retaining agent with multifunctionality, and meeting the requirements for afforestation in high salinity and barren soil in the west.
Description
技术领域technical field
本发明涉及一种应用于高盐碱和贫瘠土壤植树造林用的多功能保水剂及其制备方法。The invention relates to a multifunctional water-retaining agent for afforestation in high salinity and barren soil and a preparation method thereof.
背景技术Background technique
我国西部地域辽阔，自然资源丰富。但是由于水资源的缺乏和长期过伐、过垦、过牧、过采等人为活动，西部水土流水、沙漠化、盐渍化等土地退化严重；干旱、沙尘暴等自然灾害发生日趋频繁，已成为西部经济和社会可持续发展的重要制约因素。为此，国家实施了西部大开发战略，并将生态环境的恢复作为重要的建设内容。Western my country has a vast territory and rich natural resources. However, due to the lack of water resources and human activities such as long-term over-cutting, over-reclamation, over-grazing, over-harvesting, etc., land degradation such as water and soil flow, desertification, and salinization in the west are serious; natural disasters such as drought and sandstorms are occurring more and more frequently, and it has become a western region. An important constraint factor for sustainable economic and social development. For this reason, the state has implemented the strategy of developing the western region, and regards the restoration of the ecological environment as an important construction content.
近几年来国家和地方政府投入了大量的人力、物力和财力，进行了生态环境的恢复与治理工作，取得了一定的成绩，但植树造林的成活率却不理想。其主要原因：一是多采用传统的方法种植，对新材料和技术的重视不够；二是尽管部分采用了保水剂等新材料，但由于保水剂不耐盐碱，尤其是对含钙、镁离子的硬水吸水效果差，植树造林的结果也不理想；三是植被荒漠的地方往往土壤中有机质也很贫乏，仅具有吸水保水功能的保水剂很难发挥作用。因此，针对目前的实际情况，开发适合西部植树造林用耐盐碱多功能保水剂，提高种树的成活率，已成为西部生态环境恢复的前提和保证。我们(申请号03120346.9)曾选用具有耐盐性的廉价无机粘土-凹凸棒分别与丙烯酸、丙烯酸和丙烯酰胺以及淀粉和丙烯酰胺接枝共聚制备了新型的有机-无机复合保水剂，其在蒸馏水和生理盐水以及含0.5％钙镁溶液中的吸水率得到大大提高，但在该类保水剂中仅含有植物所需的微量元素，而没有植物生长所必需的有机营养成分。In recent years, the state and local governments have invested a lot of manpower, material and financial resources in the restoration and management of the ecological environment, and have achieved certain results, but the survival rate of afforestation is not ideal. The main reasons are as follows: First, traditional methods are often used for planting, and new materials and technologies are not paid enough attention to; second, although some new materials such as water-retaining agents are used, water-retaining agents are not resistant to salt and alkali, especially for plants containing calcium and magnesium. The hard water absorption effect of ions is poor, and the result of afforestation is not ideal; the third is that the organic matter in the soil is often very poor in vegetation deserts, and the water-retaining agent that only has the function of absorbing and retaining water is difficult to play a role. Therefore, in view of the current actual situation, it has become the premise and guarantee for the restoration of the western ecological environment to develop a saline-alkali-tolerant multifunctional water-retaining agent suitable for afforestation in the west and improve the survival rate of planted trees. We (application number 03120346.9) have selected cheap inorganic clay-attapulgite with salt tolerance to graft copolymerize with acrylic acid, acrylic acid and acrylamide, starch and acrylamide respectively to prepare a new type of organic-inorganic composite water retention agent, which can be used in distilled water and The water absorption rate in physiological saline and 0.5% calcium and magnesium solution is greatly improved, but this type of water retaining agent only contains trace elements required by plants, and does not have organic nutrients necessary for plant growth.
发明内容Contents of the invention
为了克服现有保水剂耐盐碱的不足和满足西部黄土区对植物生长所必需的有机质的需求，本发明的目的在于提供一种既具有较好耐盐碱性能又具有缓释有机质的多功能保水剂及其制备方法。In order to overcome the lack of salt-alkali resistance of existing water-retaining agents and meet the demand for organic matter necessary for plant growth in the western loess region, the purpose of the present invention is to provide a multi-functional water-retaining agent with good salt-alkaline resistance and slow-release organic matter. Water retaining agent and preparation method thereof.
本发明通过以下措施来实现：The present invention is realized through the following measures:
采用廉价的凹凸棒土、淀粉、腐植酸和丙烯酰胺作为复合保水剂的主要原料，添加引发剂和交联剂，在水溶液中经接枝共聚、交联、水解、洗涤、干燥、粉碎、过筛等工序制成复合型保水剂。Use cheap attapulgite, starch, humic acid and acrylamide as the main raw materials of the composite water-retaining agent, add initiator and cross-linking agent, and undergo graft copolymerization, cross-linking, hydrolysis, washing, drying, crushing, and processing in aqueous solution. Screening and other processes to make a composite water retaining agent.
凹凸棒土是一种链层结构的镁铝硅酸盐矿物，在我国西部储量丰富，价格低廉。凹凸棒土表面存在大量的亲水性硅羟基，可以与烯类单体有效的接枝共聚，同时能增强复合吸水剂的凝胶强度。淀粉是一种亲水性天然高分子，用它作为制备高吸水性聚合物的原料，具有低成本和可生物降解的特点。腐植酸是一种广泛应用的有机质肥料，将它与其他成分共聚形成的保水剂，具有缓慢释放有机质的功能，同时结合凹凸棒链层中多种作物所需的微量元素如钾、铁等，可满足植物生长所必需的营养成分。Attapulgite is a magnesium aluminum silicate mineral with a chain layer structure, which is rich in reserves and low in price in western my country. There are a large number of hydrophilic silanol groups on the surface of attapulgite, which can be effectively grafted and copolymerized with vinyl monomers, and at the same time can enhance the gel strength of the composite water-absorbing agent. Starch is a kind of hydrophilic natural polymer, and it is used as a raw material for the preparation of superabsorbent polymers, which has the characteristics of low cost and biodegradability. Humic acid is a widely used organic fertilizer. The water-retaining agent formed by copolymerizing it with other ingredients has the function of slowly releasing organic matter. At the same time, it combines trace elements such as potassium and iron required by various crops in the attapulgite chain layer. It can meet the nutrients necessary for plant growth.
一种耐盐碱多功能保水剂，其特征在于保水剂原料的重量份数为：丙烯酰胺100份，淀粉20-60份，凹凸棒土20-60份，腐植酸20-40份，引发剂0.5-2.0份，交联剂0.02-0.5份；其中引发剂选自过硫酸铵或者过硫酸钾，交联剂选自N，N’-亚甲基双丙烯酰胺或甘油。A salt-alkali-resistant multifunctional water-retaining agent, characterized in that the parts by weight of the raw materials of the water-retaining agent are: 100 parts of acrylamide, 20-60 parts of starch, 20-60 parts of attapulgite, 20-40 parts of humic acid, initiator 0.5-2.0 parts, 0.02-0.5 parts of cross-linking agent; wherein the initiator is selected from ammonium persulfate or potassium persulfate, and the cross-linking agent is selected from N, N'-methylenebisacrylamide or glycerol.
耐盐碱多功能保水剂的制备方法，其特征在于首先将淀粉与蒸馏水混合后在50-100℃下糊化20分钟-1小时，然后加入凹凸棒土、丙烯酰胺、腐植酸、交联剂和引发剂，升温至40-90℃反应3-5小时后，最后加入4-6M氢氧化钠溶液，升温至90-100℃反应1-3小时，产物经洗涤、干燥、粉碎制成保水剂。The preparation method of the saline-alkali-resistant multifunctional water-retaining agent is characterized in that starch is first mixed with distilled water and gelatinized at 50-100°C for 20 minutes to 1 hour, and then attapulgite, acrylamide, humic acid and cross-linking agent are added And initiator, heat up to 40-90°C and react for 3-5 hours, finally add 4-6M sodium hydroxide solution, heat up to 90-100°C and react for 1-3 hours, the product is washed, dried, and pulverized to make a water-retaining agent .
上述方法中凹凸棒土的粒径为0.03-0.05mm。The particle size of the attapulgite in the above method is 0.03-0.05mm.
上述方法中淀粉与蒸馏水的重量比为10-40。In the above method, the weight ratio of starch to distilled water is 10-40.
上述方法中氢氧化钠与丙烯酰胺的摩尔比为1∶0.2-0.8。In the above method, the molar ratio of sodium hydroxide to acrylamide is 1:0.2-0.8.
上述方法中凹凸棒土要进行酸化处理，具体是用盐酸室温浸泡20-40小时，然后烘干、粉碎。In the above method, the attapulgite should be subjected to acidification treatment, specifically soaking with hydrochloric acid at room temperature for 20-40 hours, then drying and pulverizing.
与现有技术相比，本发明具有以下优点：由于使用了廉价的凹凸棒土、腐植酸和淀粉，使复合保水剂具有低成本和可生物降解的优点。该复合保水剂对含钙镁离子的溶液具有较高的吸水率，其干物吸收蒸馏水的质量倍数为300-800，吸收0.9％NaCl溶液的质量倍数为50-80，吸收0.5％CaCl2和MgCl2溶液的质量倍数分别为8-12和10-16(而目前商品化的保水剂多为2-5左右)。该复合保水剂使用寿命长，重复吸水-失水5次后仍高达初始吸水率的80％。该复合保水剂中的腐植酸可缓慢释放，满足植物对有机质的需求，同时凹凸棒土中的多种微量元素，可供作物吸收。经在土壤中的实际使用，发现该复合保水剂中的凹凸棒土还可改善土壤的团粒结构，提高土壤的透气性和透氧性，有效的防止土壤板结。在保水剂完全失效后淀粉又可生物降解，不会对土壤造成二次污染。Compared with the prior art, the invention has the following advantages: the composite water-retaining agent has the advantages of low cost and biodegradability due to the use of cheap attapulgite, humic acid and starch. The composite water retaining agent has a high water absorption rate for solutions containing calcium and magnesium ions. The mass multiples of its dry matter absorbing distilled water are 300-800, the mass multiples of absorbing 0.9% NaCl solution are 50-80, and the mass multiples of absorbing 0.5% CaCl2 and MgCl The mass multiples of the 2 solutions are 8-12 and 10-16 respectively (while the current commercialized water retaining agents are mostly about 2-5). The composite water-retaining agent has a long service life, and after repeated water absorption and water loss for 5 times, it is still as high as 80% of the initial water absorption rate. The humic acid in the composite water-retaining agent can be slowly released to meet the needs of plants for organic matter, and at the same time, various trace elements in the attapulgite can be absorbed by crops. After actual use in soil, it is found that the attapulgite in the composite water-retaining agent can also improve the aggregate structure of the soil, improve the air permeability and oxygen permeability of the soil, and effectively prevent soil compaction. Starch can be biodegraded after the water-retaining agent is completely ineffective, and will not cause secondary pollution to the soil.
具体实施方式Detailed ways
下面结合实施例对本发明做进一步说明。The present invention will be further described below in conjunction with embodiment.
实施例1：Example 1:
将天然的凹凸棒土用盐酸浸泡24小时后，100-120℃烘干至恒重，粉碎后备用。将12克玉米淀粉与130ml蒸馏水的混合物在95℃下糊化30分钟后，降温至40℃，剧烈搅拌下加入14克凹凸棒土、36克丙烯酰胺、7克腐殖酸、0.7克引发剂，0.021克交联剂，升温至50-70℃并保持3-5小时。然后升温至95℃，加入5M的氢氧化钠溶液60ml，保持1小时。将产物在70℃下烘至恒重，粉碎，过40目网筛。产品每克吸蒸馏水623克，吸0.9％NaCl溶液78克，色泽为淡黄色。The natural attapulgite is soaked in hydrochloric acid for 24 hours, dried at 100-120°C to constant weight, and crushed for later use. The mixture of 12 grams of cornstarch and 130ml of distilled water was gelatinized at 95°C for 30 minutes, then cooled to 40°C, and 14 grams of attapulgite, 36 grams of acrylamide, 7 grams of humic acid, and 0.7 grams of initiator were added under vigorous stirring. , 0.021 g of cross-linking agent, heated to 50-70 ° C and maintained for 3-5 hours. Then the temperature was raised to 95° C., 60 ml of 5M sodium hydroxide solution was added, and kept for 1 hour. The product was dried at 70°C until constant weight, crushed, and passed through a 40-mesh sieve. Every gram of the product absorbs 623 grams of distilled water and 78 grams of 0.9% NaCl solution, and its color is pale yellow.
实施例2：Example 2:
将天然的凹凸棒土用盐酸浸泡24小时后，120℃烘干至恒重，粉碎后备用。将60克玉米淀粉与1250ml蒸馏水的混合物在95℃下糊化50分钟后，降温至40℃，剧烈搅拌下加入81克凹凸棒土、180克丙烯酰胺、81克腐殖酸、4.1克引发剂，0.12克交联剂，升温至50-70℃并保持3-5小时。然后升温至95℃，加入5M的氢氧化钠溶液300ml，保持1小时。将产物在70℃下烘至恒重，粉碎，过40目网筛。产品每克吸蒸馏水561克，吸0.9％NaCl溶液63克，色泽为淡黄色。Soak the natural attapulgite in hydrochloric acid for 24 hours, dry it at 120°C until it reaches a constant weight, and crush it for later use. The mixture of 60 grams of corn starch and 1250 ml of distilled water was gelatinized at 95°C for 50 minutes, then cooled to 40°C, and 81 grams of attapulgite, 180 grams of acrylamide, 81 grams of humic acid, and 4.1 grams of initiator were added under vigorous stirring , 0.12 grams of cross-linking agent, heated to 50-70 ° C and maintained for 3-5 hours. Then the temperature was raised to 95° C., 300 ml of 5M sodium hydroxide solution was added, and kept for 1 hour. The product was dried at 70°C until constant weight, crushed, and passed through a 40-mesh sieve. Every gram of the product absorbs 561 grams of distilled water and 63 grams of 0.9% NaCl solution, and its color is pale yellow.
实施例3：Example 3:
将天然的凹凸棒土用盐酸浸泡24小时后，120℃烘至恒重，粉碎后备用。将20克马铃薯淀粉与350ml蒸馏水的混合物在95℃下糊化30分钟后，降温至40℃，剧烈搅拌下加入27克凹凸棒土、60克丙烯酰胺、27克腐殖酸、1.36克引发剂、0.04克交联剂，升温至50-70℃并保持3-5小时。然后升温至95℃，加入5M的氢氧化钠溶液68ml，保持2小时。将产物在70℃下烘至恒重，粉碎，过40目网筛。产品每克吸蒸馏水692克，吸0.9％NaCl溶液65克，色泽为淡黄色。Soak the natural attapulgite in hydrochloric acid for 24 hours, bake it at 120°C until it reaches constant weight, and crush it for later use. The mixture of 20 grams of potato starch and 350 ml of distilled water was gelatinized at 95°C for 30 minutes, then cooled to 40°C, and 27 grams of attapulgite, 60 grams of acrylamide, 27 grams of humic acid, and 1.36 grams of initiator were added under vigorous stirring , 0.04 g of cross-linking agent, heated to 50-70 ° C and maintained for 3-5 hours. Then the temperature was raised to 95° C., 68 ml of 5M sodium hydroxide solution was added and kept for 2 hours. The product was dried at 70°C until constant weight, crushed, and passed through a 40-mesh sieve. Every gram of the product absorbs 692 grams of distilled water and 65 grams of 0.9% NaCl solution, and its color is pale yellow.
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| CN101463247B (en) * | 2007-12-21 | 2012-10-24 | 中国科学院沈阳应用生态研究所 | Composite type soil water retention agent and preparation |
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| CN101463247B (en) * | 2007-12-21 | 2012-10-24 | 中国科学院沈阳应用生态研究所 | Composite type soil water retention agent and preparation |
| CN101462911B (en) * | 2007-12-21 | 2013-06-12 | 中国科学院沈阳应用生态研究所 | Special moisture preservation compound fertilizer for maize in arid and semi-arid area and preparation thereof |
| CN102775992A (en) * | 2012-08-22 | 2012-11-14 | 乌鲁木齐中汇国豪生物科技有限公司 | Organic-inorganic multifunctional water-retaining agent for resisting saline and alkaline and preparation method thereof |
| CN102875260A (en) * | 2012-10-22 | 2013-01-16 | 江苏花海农业科技有限公司 | Production method of granular saline-alkaline soil water holding slow release fertilizer |
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| CN106047357A (en) * | 2016-05-31 | 2016-10-26 | 山东胜伟园林科技有限公司 | Method for performing natural soil greening on slight alkaline land by using salt-resistant water-retaining agent containing attapulgite |
| CN106365887A (en) * | 2016-08-25 | 2017-02-01 | 董晓 | Preparation method of saline-alkaline-tolerant fertilizing-type water retaining agent |
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