Preparation and Properties of Aldehyde Free Adhesive Based on Plant Protein

Abstract

At present, the most used wood adhesive in China is still "formaldehyde-based adhesive", and "formaldehyde-based adhesive" will release formaldehyde in the process of production and practical application, causing damage to the environment and human body. With the continuous depletion of oil resources and people's attention to environmental protection, it is of great scientific significance and practical value to develop a new type of environmental protection adhesive with renewable biomass as the main raw material. Using plant meal as the main raw material for preparing protein adhesive can not only reduce the cost of adhesive, but also break through the supply and demand limit of soybean protein. In this study, plant meal was used as the raw material, and the raw material was used as the adhesive base material after water washing pretreatment process. The bonding properties of the prepared protein adhesive were discussed. The effects of cottonseed powder particle size and treatment temperature on the properties were analyzed. An aldehyde free adhesive with bonding strength and water resistance meeting the requirements of national standard was obtained, and the maximum water resistance adhesive strength can reach 0.98mpa, It meets the standard of national standard class II plywood, and the formaldehyde emission reaches the group standard of formaldehyde free wood-based panel, which has great market promotion potential.