Bio oil-starch adhesive and preparation method thereof

A starch adhesive, bio-oil technology, applied in the directions of starch-derived adhesives, unsaturated alcohol copolymer adhesives, adhesive types, etc., can solve the problem of being unable to get rid of the dependence of adhesives, not suitable for large-scale promotion, and the cost of adhesive preparation. Advanced problems, to achieve the effect of solving the problem of formaldehyde release, easy implementation, and low toxicity

Inactive Publication Date: 2010-08-18
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A variety of starch-based wood adhesives have been developed at present, and Wang Xinbo etc. (references Wang Xinbo, Wu Youshi. Preparation of urea-dialdehyde starch adhesive. Fine and Chemical Special Products, 2003, 13.) first carry out the double aldehyde treatment of starch, and then The prepared dialdehyde starch is reacted with urea under acidic conditions, and finally borax is added for complexation to obtain a starch-based adhesive for wood; although the performance of the adhesive prepared by this method meets the requirements of the national standard, due to its main The raw material is urea, so it still cannot get rid of the adhesive's dependence on fossil resources
Shi Junyou et al. (Shi Junyou, Wang Shumin. Research on Corn Starch Modified API Adhesives. China Adhesives, 2006, 1.) first carried out acid hydrolysis and ox

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0033] Example 1

[0034] ①Acid hydrolysis and oxidation of starch:

[0035] 35 parts of tapioca starch parts are joined in the hydrochloric acid of 65 parts of concentration 0.5mol / L, be mixed with the starch emulsion that concentration is 35%, adjust pH to 2, this emulsion is joined in the there-necked flask that condensation tube and thermometer are arranged, keep The temperature was raised to 50°C under stirring, the constant temperature acid hydrolysis reaction was carried out for 3 hours, the pH value was adjusted to 4-6, and then 65 parts of sodium periodate solution with a concentration of 0.6mol / L was added, and the oxidation reaction was carried out at a temperature of 35°C for 3 hours. Add an appropriate amount of sodium bisulfite solution to terminate the oxidation reaction, and then produce acid-decomposed oxidized starch;

[0036] ② Refining and purification of bio-oil:

[0037] Dissolve 100 parts of bio-oil crude oil in 100 parts of ethyl acetate solution, fil...

Example Embodiment

[0042] Example 2

[0043] The amount of tapioca starch in step ① is 40 parts, the amount of hydrochloric acid is 60 parts, and the acid hydrolysis reaction temperature is 35°C; the reaction temperature of bio-oil and starch in step ③ is 65°C, the reaction time is 40min, and the temperature is raised to 80°C. The amount of polyvinyl alcohol added was 100 parts and reacted for 50 minutes; other raw materials and reaction conditions were as in Example 1.

Example Embodiment

[0044] Example 3

[0045] The temperature of acidolysis and oxidation reaction in step ① is 80 ℃, and the time of acidolysis and oxidation reaction is 1 hour; Step ③ bio-oil and starch reaction temperature is 75 ℃, the amount of adding polyvinyl alcohol solution is 150 parts; 4. the amount that adds borax in the middle is 2 parts, and the amount of isocyanate is 20 parts; Other raw materials and reaction conditions are as embodiment 1.

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Abstract

The invention relates to a novel bio oil-starch adhesive for the artificial board and a preparation method thereof, which belong to the technical field of the artificial board in the wood processing. The adhesive uses starch and bio oil as the main raw material. The preparation method comprises the following steps: firstly carrying out acidolysis and oxidation treatment on the starch and simultaneously carrying out purification treatment on the bio oil; then carrying out proportioning on the processed bio oil and starch according to proper proportion and preparing linear high molecular polymer by addition and polycondensation reactions; adding polyvinyl alcohol into the high molecular polymer to prepare a main agent of the adhesive by esterification; and finally adding a borax cross-linking agent and diisocyanate into the main agent of the adhesive to prepare the bio oil-starch adhesive. The invention has the characteristics of novel design, standard process, no environment pollution and the like. The prepared adhesive has the advantages of environment protection, low cost, good water resisting property, high stability and the like and can be widely used in the fields of building materials, house decoration, home decoration and the like.

Description

technical field [0001] The invention belongs to the technical field of wood-based panels in wood processing, and in particular relates to a biological oil-starch adhesive and a preparation method thereof. technical background [0002] In recent years, the development trend of adhesives used in the wood-based panel industry is the direction of green environmental protection, low cost, excellent performance, energy saving and solvent-free. In the current wood-based panel market, traditional three-aldehyde adhesives (urea-formaldehyde resin adhesives, phenolic resin adhesives, and melamine resin adhesives) still occupy a dominant position, because three-aldehyde adhesives are easy to release harmful substances such as formaldehyde, causing serious damage to human health and society. The natural environment is threatened, so there is an urgent need for human beings to develop a new type of environmentally friendly adhesive, which can not only achieve the purpose of environmental...

Claims

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Application Information

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IPC IPC(8): C09J103/10C09J129/04C09J11/04C09J11/06
Inventor 常建民夏碧华许守强张继宗
Owner BEIJING FORESTRY UNIVERSITY
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