A kind of natural environmental protection type modified casein glue and its preparation process

A technology of natural environmental protection and preparation technology, which is applied in the preparation of natural environment-friendly modified casein glue, natural environment-friendly modified casein glue, and natural environment-friendly adhesive, which can solve the problem of lower environmental protection performance of casein glue and health problems. Threats to life, irritation and flammability, etc., to achieve the effect of easy control of the reaction process, maintaining naturalness, and reducing energy consumption

Inactive Publication Date: 2017-07-18
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 1.0mol·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 1.0mol·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 precipitate...

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Abstract

The invention discloses a natural environment-friendly modified casein glue and a preparation process thereof, aiming to provide a modified preparation using succinic anhydride as a raw material, starch and urea as auxiliary materials, and a trace amount of monoglyceride , calcium chloride, and sodium benzoate are natural environment-friendly modified casein glue prepared as auxiliary agents and a preparation method thereof; the modified preparation succinic anhydride used in the present invention has little side effects and remarkable modification effect, and succinylated casein carboxyl The content is significantly increased, and its solubility and other processing characteristics are significantly improved; acylated casein is used as raw material to prepare adhesives, avoiding the addition of chemical additives, significantly improving the environmental performance of casein adhesives, and satisfying people's health requirements for adhesives. Environmental protection requirements; the prepared casein adhesive has high viscosity and low stringiness, which can meet the industrial requirements for adhesive bonding; the preparation conditions of the modified casein adhesive are mild, the preparation process is simple, and the preparation process is easy to control. Industrialized production and promotion.

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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Patent Type & Authority Patents(China)
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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