For plastic wood composite materials, the problem of interface compatibility has been bothering us, so how to improve it? Here are a few possibilities to share with you.
The wood fibre surface of the plastic wood composite was pretreated
The surface of wood fibre was treated by physical or chemical methods, and the surface state of wood fibre was changed to improve the surface compatibility. Woodiness material is a kind of natural high molecular material composed of cellulose, hemicellulose, lignin and extractor etc. It is an uneven anisotropic material, so the interface characteristic is very complex. Of woodiness material at the same time the main ingredients such as cellulose, hemicellulose, and lignin contained a large number of polarity cyano functions such as design, its surface showed a strong chemical polarity, and the wood fibre surface is mainly through the study of the esterification of polar functional groups of modified treatment, dissolved similar on the surface of the surface of wood fiber and plastic, in order to reduce the plastic surface between the receptivity of base material with woodiness material, achieve the goal of improving the interface bonding.
Physical method for improving interface compatibility of plastic – wood composite materials
Physical methods include surface fibrillation and discharge treatment. In the surface modification of plant fibres, low-temperature plasma discharge, sputtering discharge and corona discharge have attracted more and more attention. Low-temperature plasma discharge treatment mainly causes chemical modification, polymerization, free radical generation, crystallization and other changes. Sputtering discharge treatment mainly causes physical changes.
In order to improve the interface compatibility of plastic-wood composite materials, the first step is to pretreat it, and then to improve it by co-dividing physical and chemical methods.