A kind of epoxidized soybean-based adhesive and preparation method thereof

A technology of epoxidizing soybeans and base glue, which is applied in the preparation of animal glue or gelatin, adhesives, adhesive types, etc., can solve the problems of increased operation difficulty, unstable performance of final products, formaldehyde release, etc., and achieve stability Good, the effect of shortening the pre-processing time and improving the reactivity

Inactive Publication Date: 2016-06-29
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these blending modification methods have improved the performance of soybean-based adhesives, the modified soybean gum blended with PF and MUF still has the problem of formaldehyde release; and the polymer containing epoxy groups has no formaldehyde release, but mainly It may be used as a curing agent for modified soybean gum, or an additional curing agent needs to be added to make it solidify, which increases the difficulty of operation and easily leads to unstable performance of the final product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] An epoxidized soybean-based adhesive, the specific steps of its preparation method are as follows:

[0026] 1) Enzymolysis modification: Add 50 parts of boiler condensate water and 10 parts of defatted soybean flour with a particle size of 100 mesh in a reaction kettle with controllable temperature and agitator speed, control the temperature of the reaction kettle to 35°C, and the agitator speed to be 90 rpm, stirred for 40 minutes, added 0.15 parts of hydrobromic acid solution with a mass fraction of 35%, reacted for 5 minutes, raised the temperature to 60°C, added 0.18 parts of hemicellulase, and reacted for 40 minutes;

[0027] 2) Adjust pH: cool down to 40°C, adjust pH=1.0 with 30% hydrochloric acid solution, react for 20 minutes, then cool down to 25°C, adjust pH=5.3 with solid calcium hydroxide, react for 20 minutes;

[0028] 3) Epoxidation: heat up to 50°C, slowly add 0.5 parts of epichlorohydrin, react for 60 minutes, then cool down to 25°C to obtain epoxidized ...

Embodiment 2

[0030] An epoxidized soybean-based adhesive, the specific steps of its preparation method are as follows:

[0031] 1) Enzymolysis modification: Add 150 parts of boiler condensate water and 40 parts of defatted soybean flour with a particle size of 200 mesh in a reaction kettle with controllable temperature and agitator speed, control the temperature of the reaction kettle to 20°C, and the agitator speed to be 80 rpm, stirring for 30 minutes, adding 1.00 parts of acetic acid solution with a mass fraction of 30%, reacting for 15 minutes, raising the temperature to 50°C, adding 2.40 parts of cellulase, and reacting for 40 minutes;

[0032] 2) Adjust pH: cool down to 30°C, adjust pH=1.4 with 25% hydrobromic acid solution, react for 30 minutes, then cool down to 25°C, adjust pH with 40% sodium hydroxide solution =6.8, reacted for 50 minutes;

[0033] 3) Epoxidation: heat up to 70°C, slowly add 1.5 parts of epichlorohydrin, react for 40 minutes, then cool down to 25°C to obtain epo...

Embodiment 3

[0035] An epoxidized soybean-based adhesive, the specific steps of its preparation method are as follows:

[0036] 1) Enzymolysis modification: Add 40 parts of distilled water and 10 parts of defatted soybean powder with a particle size of 240 mesh in a reaction kettle with controllable temperature and agitator speed, control the temperature of the reaction kettle to 30°C, and the agitator speed to 110 rpm / minute, stirring for 60 minutes, adding 0.15 parts of hydrochloric acid solution with a mass fraction of 30%, reacting for 15 minutes, raising the temperature to 45°C, adding 0.13 parts of hemicellulase, and reacting for 50 minutes;

[0037] 2) Adjust pH: cool down to 35°C, adjust pH=1.6 with 65% sulfuric acid solution, react for 40 minutes, then cool down to 25°C, add 30% sodium hydroxide and 30% hydrogen Potassium oxide equal volume mixed solution to adjust pH=5.5, react for 30 minutes;

[0038] 3) Epoxidation: heat up to 75°C, slowly add 2.0 parts of epichlorohydrin, r...

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Abstract

The invention discloses an epoxidized soy-based adhesive and a preparation method thereof. The method comprises the following steps: by taking 10-40 parts of defatted soya flour, 40-150 parts of water, 0.15-1.00 part of acid solution, 0.13-2.40 parts of biological enzyme and 0.5-2.0 parts of epoxy chloropropane as raw materials, carrying out enzymatic hydrolysis modification, adjusting pH, and epoxidizing so as to prepare the epoxidized soy-based adhesive. The adhesive contains an epoxy group, has the characteristics of being free of formaldehyde release, good in environmental performance, high in bonding strength and the like, and is applicable to industries such as wood processing, building decoration and the like.

Description

technical field [0001] The invention belongs to the technical field of wood adhesive preparation, relates to a biomass-based material, in particular to a water-based epoxidized soybean-based adhesive with good environmental performance and a preparation method thereof. Background technique [0002] Since petroleum is a non-renewable resource, petroleum-based adhesives that use petroleum derivatives as raw materials are facing challenges such as reduced raw material sources and increased costs. Biomass adhesives based on renewable resources effectively avoid the problems faced by petroleum-based adhesives, and are an important direction for the development of adhesives. Among many biomasses, soybean has the characteristics of high yield and low cost. Its by-product after oil extraction——defatted soybean powder contains 50% vegetable protein, which is the main raw material for the preparation of biomass adhesives. However, the performance of adhesives prepared from defatted s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J189/00C08H1/00
Inventor 林巧佳陈奶荣曾钦志饶久平
Owner FUJIAN AGRI & FORESTRY UNIV
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