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Natural environment-friendly modified casein glue and preparation process thereof

A natural environmental protection and preparation technology, applied in the preparation of animal glue or gelatin, protein adhesives, adhesives, etc., can solve the problems of casein glue environmental protection performance reduction, irritation and flammability, threats to healthy life, etc., to achieve The reaction process is easy to control, maintains naturalness, and reduces energy consumption

Inactive Publication Date: 2015-04-22
GANSU AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyvinyl alcohol is irritating and flammable, the monomer acrylamide used in the synthesis of polyacrylamide is toxic, and other polymer additives are not natural additives, so that the environmental protection performance of casein glue is reduced, which brings great benefits to people's healthy life. poses a great threat

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh 3.0 g of casein, dissolve it in 300 mL of deionized water, stir at 40 °C, and add 1.0 mol L -1 The sodium hydroxide solution constantly adjusts the pH to stabilize it at 6.5. After stirring for about 1 hour, the casein is completely dissolved, and the obtained casein solution is set aside. Add 1.0 mol·L dropwise -1 Sodium hydroxide solution adjusted the pH of the above solution to 8.0, stirred at a constant temperature at 40° C., and added 1.2 g of succinic anhydride three times. After adding, use 1.0 mol·L -1 The sodium hydroxide solution constantly adjusted the pH of the casein solution to stabilize it at 8.0 until the anhydride was completely dissolved, and continued to stir for 50 minutes to obtain the acylated casein solution. Add 1.0mol·L dropwise -1 hydrochloric acid solution and keep stirring until a large amount of casein precipitates out. Put the solution in a centrifuge tube, centrifuge at 3500g for 15min, discard the supernatant, put the precipita...

Embodiment 2

[0026] Weigh 3.000g casein, dissolve it in 300mL deionized water, stir at 40°C, and add 1.0 mol·L -1 The sodium hydroxide solution constantly adjusts the pH to stabilize it at 7.0. After stirring for about 1 hour, the casein is completely dissolved, and the obtained casein solution is set aside. Add 1.0 mol·L dropwise -1 Sodium hydroxide solution adjusted the pH of the above solution to 9.0, stirred at a constant temperature at 40° C., and added 1.8 g of succinic anhydride three times. After adding, use 1.0 mol·L -1 The sodium hydroxide solution continuously adjusts the pH of the casein solution to stabilize it at 9.0 until the anhydride is completely dissolved, and continues to stir for 50 minutes to obtain the acylated casein solution. Add 1.0mol·L dropwise -1 hydrochloric acid solution and keep stirring until a large amount of casein precipitates out. Put the solution in a centrifuge tube, centrifuge at 3500g for 15min, discard the supernatant, put the precipitate in a...

Embodiment 3

[0033] Weigh 3.000g casein, dissolve it in 300mL deionized water, stir magnetically at 40°C, and add 1.0 mol·L -1 The sodium hydroxide solution constantly adjusts the pH to stabilize it at 7.5. After stirring for about 1 hour, the casein is completely dissolved, and the obtained casein solution is set aside. Add 1.0 mol·L dropwise -1 Sodium hydroxide solution adjusted the pH of the above solution to 9.5, stirred magnetically at 40° C., and added 2.4 g of succinic anhydride three times. After adding, use 1.0 mol·L -1 The sodium hydroxide solution constantly adjusted the pH of the casein solution to stabilize it at 9.5 until the anhydride was completely dissolved, and continued to stir for 50 minutes to obtain the acylated casein solution. Quickly add 1.0mol·L dropwise -1 hydrochloric acid solution and keep stirring until a large amount of casein precipitates out. Put the solution in a centrifuge tube, centrifuge at 3500g for 15min, discard the supernatant, put the precipit...

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Abstract

The invention discloses natural environment-friendly modified casein glue and a preparation process thereof and aims at providing natural environment-friendly modified casein glue prepared by taking succinic anhydride as a modified agent, casein as a raw material, starch and urea as auxiliary materials and trace monoglyceride, calcium chloride and sodium benzoate as aids and a preparation process thereof. The used modified agent succinic anhydride has small toxic and side effects, the modification effect is obvious, the carboxyl content of the succinylated casein is obviously increased, and the solubleness and other processing characteristics are obviously improved; the acylated casein is taken as a raw material to prepare an adhesive, addition of auxiliary chemicals is avoided, the environmental protection performance of the casein glue is obviously improved, and the requirements on health and environmental friendliness of the adhesive are met; the prepared casein glue is high in viscosity and low in spinnability, and the adhesion requirement on the adhesive in the industry can be met; and moreover, the modified casein glue is mild in preparation conditions, simple in preparation process and easily controlled in preparation process and is suitable for industrial production and popularization.

Description

technical field [0001] The invention belongs to the technical field of adhesives, and relates to a natural environment-friendly adhesive, specifically a natural environment-friendly modified casein glue produced by using succinic anhydride as a modified preparation and casein as a raw material; the present invention The invention also relates to a preparation process of natural environment-friendly modified casein glue. Background technique [0002] Casein accounts for about 80% of the total protein in milk. Cow milk is skimmed, acid-precipitated, dehydrated, and dried to make a powdery product called casein, also known as casein. Casein and its products have high nutritional value and good functional properties. They are suitable as emulsifiers, thickeners and nutritional enhancers, and are widely used in the food industry, chemical industry and pharmaceutical industry. [0003] As a kind of water-based adhesive, casein adhesive is widely used in food and chemical industr...

Claims

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Application Information

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IPC IPC(8): C09J189/00C09J11/06C09J11/04C08H1/00
Inventor 杨敏靳其军张光地
Owner GANSU AGRI UNIV
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