Bio oil-starch adhesive and preparation method thereof

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...

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 oxidation treatment of starch, and contacted with acrylamide under the action of initiator ammonium persulfate. Branches are made into composite modified starch, and then polyvinyl alcohol is added in the presence of oxalic acid to undergo esterification reaction with starch to obtain the main agent of starch adhesive, and finally cross-linking agent-polymerized isocyanate is added to prepare starch adhesive for wood-based panels; The adhesive prepared by this method has high bonding strength and water resistance, but because the raw material is corn starch, it is easy to cause resource shortage, and it is not suitable for large-scale promotion. In addition, there are many auxiliary reagents added in the preparation process of the adhesive. Complicated, resulting in higher preparation costs of adhesives and poor market competitiveness