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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: 2013-01-23
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

Benefits of technology

This new type of polymer can be made up from four different types of molecules that work together like an oligomer or larger chain called glucomannan gum (G). These three components improve their ability to absorb large amounts of liquid compared with traditional plastics while still being able to keep them dry for longer periods without losing its effectiveness due to evaporation overtime.

Problems solved by technology

This patented technology describes different ways to improve upon existing materials that hold water and oily substances (such as cotton) together due to their ability to absorb them simultaneously without losing much needed volume within usable spaces like human body cavities such as blood vessels.

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
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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 emulsion 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) Add the ...

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 emulsion 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 we...

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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

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Claims

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Application Information

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Owner 建湖上冈产业园服务有限公司
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