Preparation of graft modification protein-based adhesive

A graft-modified, protein-based technology, applied in the field of graft copolymerization modified protein-based adhesives and protein-based adhesives, to achieve the effect of increasing added value, superior water resistance, and strong interaction

Inactive Publication Date: 2008-11-12
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of these reports adopt the method of blending modification to modify soybean protein, and almost none of them adopt the method of graft modification.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: Pretreat 4g of soybean protein isolate with 100mL of 3mol / L urea solution at 70°C for 30min; add solutions containing 0.2g of sodium bisulfite and 0.44g of ammonium persulfate respectively, react at 70°C for 10min; add 3g Graft monomer glycidyl methacrylate, react at 70°C for 3 hours, add 0.4g saturated solution of hydroquinone, 0.8g sodium alginate, 0.2g tributyl phosphate and 3.2g diatomaceous earth successively to obtain grafted Modified protein-based wood adhesives.

Embodiment 2

[0031] Example 2: Pretreat 4g of soybean protein isolate with 100mL of 4mol / L urea solution at 50°C for 40min; add solutions containing 0.1g of sodium bisulfite and 0.22g of ammonium persulfate respectively, react at 50°C for 10min; add 2g Graft monomer hydroxyethyl methacrylate, react at 50°C for 3 hours, add 0.8g saturated hydroquinone solution, 1.6g sodium alginate, 0.32g tributyl phosphate and 1.6g diatomaceous earth in sequence to obtain Graft-modified protein-based wood adhesives.

Embodiment 3

[0032]Example 3: Pretreat 4g of defatted soybean powder with 100mL of 3mol / L urea solution at 60°C for 40min; add solutions containing 0.3g of sodium bisulfite and 0.66g of ammonium persulfate respectively, react at 60°C for 10min; add 3g Graft monomer glycidyl methacrylate, react at 60°C for 4 hours, add 0.56g hydroquinone saturated solution, 2.4g sodium alginate, 0.6g isooctyl ester and 4.8g diatomaceous earth in sequence, and finally use A colloid mill and a homogenizer are used for homogenization to obtain a grafted modified protein-based wood adhesive.

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PUM

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Abstract

The invention relates to a method for preparing graft modification protein adhesives, belonging to the adhesive technical field. The method obtains the graft modification protein adhesives by adopting redox system initiator to react for a period of time at a certain temperature and linking vinyl monomer branched chains on a protein trunk chain. During the production and use processes, substances such as formaldehydes and so on are not released, thereby the method is favorable for environmental protection; and simultaneously the method can increase the added value of protein products and has important economic value. Because more hydrophobic groups are linked on the protein trunk chain, the interaction between the graft modification protein adhesives obtained and molecular groups on the wood surface is stronger and the adhesives are difficult to damage by water molecules, thereby the graft modification protein adhesives have good bonding strength and superior water resistance. The method widens the application environment and solves the problem which disturbs actual application of the protein adhesives for a long time, consequently having obvious technical advance.

Description

technical field [0001] The invention relates to a preparation method of a graft modified protein-based adhesive, which relates to a protein-based adhesive used as an adhesive for bonding wood, for example. Specifically, the present invention relates to a protein-based adhesive modified by graft copolymerization. Through graft copolymerization, the main chain of the protein is modified to improve its adhesion and water resistance. The invention belongs to the technical field of adhesives and also belongs to the technical field of environmental protection. Background technique [0002] Soybean protein is a natural protein polymer and is a biodegradable organic material. Soy protein adhesives have a long history. In 1923, the first patent on soybean protein adhesives appeared, and the research on modern soybean protein adhesives began. In the past ten years, due to the limitation of global petroleum resources and the existence of a large amount of toxic and volatile formaldeh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J151/00C08F289/00C08F2/04
Inventor 刘晓亚唐蔚波白绘宇周翠杨成江金强张胜文王玮
Owner JIANGNAN UNIV
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