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Wood adhesive prepared by degrading soybean protein by utilizing strong basicity and preparation method thereof

The technology of wood adhesive and soybean protein is applied in the field of wood processing adhesive and its preparation, which can solve the problems of high moisture content, high viscosity, low soybean protein content, etc., so as to improve the bonding strength and increase the adsorption effect. Effect

Inactive Publication Date: 2010-06-09
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problems of low soybean protein content, high moisture content and high viscosity in existing soybean adhesives or soybean protein adhesives, and provides a wood adhesive prepared by degrading soybean protein with strong alkali

Method used

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  • Wood adhesive prepared by degrading soybean protein by utilizing strong basicity and preparation method thereof
  • Wood adhesive prepared by degrading soybean protein by utilizing strong basicity and preparation method thereof
  • Wood adhesive prepared by degrading soybean protein by utilizing strong basicity and preparation method thereof

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specific Embodiment approach 1

[0014] Specific embodiment 1: The wood adhesive prepared by using strong alkali to degrade soy protein in this embodiment is degraded from 60 to 80 parts of defatted soy protein powder, 5 to 10 parts of strong alkali and 95 parts of water in parts by weight. After the reaction, use concentrated phosphoric acid to adjust the pH value between 6.5 and 7.5, and then add 0.01 to 20 parts of dibasic aldehyde and mix well.

[0015] The wood adhesive of this embodiment has a high solid content (the solid content of the glue measured according to the method described in the national standard GBT 14074-2006 is 40.3% to 50.6%) and a high soy protein content (its soy protein powder or soy protein isolate) The weight fraction of the glue is 32%~42%), low viscosity (the viscosity of the glue is 33~245mPa·s measured at 25℃ according to the method described in the national standard GBT 14074-2006), good bonding effect and extremely low free The characteristic of formaldehyde release is an enviro...

specific Embodiment approach 2

[0016] Specific embodiment two: this embodiment is different from specific embodiment one in that: the wood adhesive prepared by using strong alkali to degrade soy protein is composed of 60 to 80 parts of soy protein isolate and 5 to 10 parts by weight. Alkali and 95 parts of water are used to adjust the pH value between 6.5 and 7.5 with concentrated phosphoric acid after the degradation reaction, and then 0.01 to 20 parts of dibasic aldehyde are added and mixed.

specific Embodiment approach 3

[0017] Specific embodiment three: This embodiment is different from specific embodiment one or two in that the strong base is sodium hydroxide or potassium hydroxide. Others are the same as the first or second embodiment.

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Abstract

The invention discloses a wood adhesive prepared by degrading soybean protein by utilizing strong basicity and a preparation method thereof, and relates to a soybean protein-based wood adhesive and a preparation method thereof. The invention solves the problems of low content of the soybean protein, high moisture content and large viscosity existing in conventional soybean adhesives or soybean protein adhesives. The product is prepared by performing a degradation reaction of defatted soybean protein powder or soybean protein isolate, strong base and water, then using strong phosphoric acid to adjust the pH value of the obtained solution, and then adding dialdehyde into the obtained solution to mix the solution evenly. The method comprises the steps of: 1, weighing; 2, preparing strong base solution, heating the strong base solution, adding the defatted soybean protein powder or the soybean protein isolate into the strong base solution under stirring, and then cooling the strong base solution to a room temperature after heating reflux; and 3, using the strong phosphoric acid to adjust the pH value, adding the dialdehyde into the solution, and stirring the solution evenly. The adhesive has the advantages of high content of the soybean protein, low moisture content and low viscosity, and can be used for preparing plywood, flakeboards and medium-density fiberboards.

Description

Technical field [0001] The invention relates to a wood adhesive and a preparation method thereof, in particular to a wood processing adhesive prepared by using strong alkali to degrade soybean protein and a preparation method thereof. Background technique [0002] Due to the strong dependence of synthetic resin adhesives on petroleum, under the situation of increasing consumption of non-renewable, limited reserves of petroleum resources, the development and utilization of resource-rich, renewable biomass resources to prepare environmentally friendly The research on biomass-based adhesives has attracted much attention from domestic and foreign scholars, industry and government. Soybean resources are rich and renewable. According to the statistics of the Food and Agriculture Organization of the United Nations (FAO), the world's soybean (seed) output exceeded 240 million tons in 2008. Soybean seeds are rich in protein, accounting for about 40% of the weight of beans. Therefore, if ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J189/00
Inventor 高振华顾继友邸明伟吕新颖顾皞
Owner NORTHEAST FORESTRY UNIVERSITY
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