Preparation method of cassava starch type high-water absorbency and oil-oil absorbency resin by cross-linked grafting technology

A technology of cassava starch and cross-linking grafting, which is applied in the field of preparation of cross-linking and grafting tapioca starch-type superabsorbent and oil-absorbing resins, can solve problems such as not being able to meet actual needs, achieve improved water-absorbing capacity and oil-absorbing capacity, and strong water-retaining performance and the effect of oil retention performance

Active Publication Date: 2014-04-16
建湖上冈产业园服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these products have achieved a certain effect in terms of water absorption and oil absorption, there is still a large distance compared with the actual demand.
For example, carboxymethylcellulose-butyl acrylate copolymer superabsorbent and oil-absorbing resin has a water absorption rate of 5 g / g and an oil absorption rate of 4 g / g, which is far from meeting actual needs.

Method used

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  • Preparation method of cassava starch type high-water absorbency and oil-oil absorbency resin by cross-linked grafting technology
  • Preparation method of cassava starch type high-water absorbency and oil-oil absorbency resin by cross-linked grafting technology
  • Preparation method of cassava starch type high-water absorbency and oil-oil absorbency resin by cross-linked grafting technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Dry 15 g of tapioca starch in a vacuum oven at 60°C to constant weight to obtain tapioca starch on a dry basis.

[0038] (2) Weigh 12g of dry base tapioca starch obtained in step (1) and 28mL of deionized water into a four-neck flask, start to heat up while stirring, stop heating when the temperature rises to 80°C, continue stirring for 20 minutes, and then start to cool down. Until the system temperature is 40°C, a gelatinized tapioca starch suspension with a mass fraction of 30% is obtained.

[0039] (3) Add 15g of solid sodium hydroxide and 35mL of deionized water into a 100mL beaker, stir and dissolve to obtain a 30% sodium hydroxide solution.

[0040] (4) Measure 11 mL of analytically pure acrylic acid and pour it into a beaker, gradually add the sodium hydroxide solution obtained in step (3) dropwise under stirring until the pH of the acrylic acid solution is 6; then add 15 mL of acrylamide with a mass fraction of 50% solution, stir well.

[0041] (5) Evenly...

Embodiment 2

[0048] (1) Dry 20 g of tapioca starch in a vacuum oven at 60°C to constant weight to obtain tapioca starch on a dry basis.

[0049] (2) Weigh 15g of dry base tapioca starch obtained in step (1) and 30mL of deionized water into a four-neck flask, start to heat up while stirring, stop heating when the temperature rises to 85°C, continue stirring for 30 minutes, and then start to cool down. Until the system temperature is 60°C, a gelatinized tapioca starch suspension with a mass fraction of 33.33% is obtained.

[0050] (3) Add 20g of solid sodium hydroxide and 30mL of deionized water into a 100mL beaker, stir and dissolve to obtain a sodium hydroxide solution with a mass fraction of 40%.

[0051] (4) Measure 12 mL of analytically pure acrylic acid and pour it into a beaker, gradually add the sodium hydroxide solution obtained in step (3) dropwise under stirring until the pH of the acrylic acid solution is 7; then add 20 mL of acrylamide with a mass fraction of 50% solution, stir w...

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Abstract

The invention discloses a preparation method of cassava starch type high-water absorbency and oil-oil absorbency resin by a cross-linked grafting technology. The preparation method comprises the following steps of: preparing the cross-linked starch grafting type high-water absorbency and oil-oil absorbency resin by taking cassava starch as a main raw material, taking crylic acid and acrylamide as water-absorbency monomers, and taking butyl acrylate and methyl methacrylate as oil-absorbency monomers through two-step and pentabasic grafting copolymerization by a solution polymerization method under the function of initiator ammonium persulfate and cross-linking agent N' N'-methylene bisacrylamide. The two water-absorbency monomers and the two oil-absorbency monomers are simultaneously grafted on the cassava starch, and the formed network space structure of the resin is more than that of the existing resin which is grafted with one water-absorbency monomer and one oil-absorbency monomer, so that the product is better in water absorbency and oil absorbency, thereby being capable of being widely applicable to the fields such as the petrochemical engineering, the daily-use chemical industry, the agriculture and forestry, the health care, the civil engineering and the like.

Description

technical field [0001] The invention relates to a preparation method of cross-linked tapioca starch type super water-absorbing and oil-absorbing resin. Background technique [0002] With the development of society and the enhancement of people's awareness of environmental protection, high-absorbent resins are more and more widely used in petroleum, chemical, agricultural, medical and health, civil engineering and other fields. At present, there are dozens of super oil-absorbing resins and super water-absorbing resins, and each product has a certain liquid absorption capacity. However, these types of products generally can only absorb water or oil alone, and cannot meet the requirements of both water and oil absorption. At home and abroad, some preliminary explorations have been made on resins with both water and oil absorption capabilities. For example, corn starch is used as raw material, acrylamide is used as water-absorbing monomer, and methyl methacrylate is used as oil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/00C08F220/06C08F220/56C08F220/14C08F220/18C08F222/38C08F4/30C08J3/24C08L51/02
Inventor 李和平杨官威胡杨张垚杨永哲袁金伟黄云燕崔丽丽
Owner 建湖上冈产业园服务有限公司
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