甲基三甲氧基硅烷浸渍改性刨花板及其性能分析

刨花板是家具制造业的首选板材,在潮湿的环境中使用易出现翘曲变形、膨胀及分层等现象。为改善刨花板防潮性能,提高其尺寸稳定性,将甲基三甲氧基硅烷(MTMS)与0.1mol/L的盐酸以4∶1的体积比混合,将混合溶液置于冰浴中超声水解360 min,然后利用MTMS水解溶液对刨花板进行5 min的浸渍处理。分析了改性前后刨花板的润湿性、抗紫外老化性、粗糙度、表面化学结构及物理力学性能。研究结果表明:经MTMS水解溶液浸渍改性的刨花板具有稳定的拒水、拒油及抗老化性能,尺寸稳定性得到改善,板坯的表面密度增加,力学性能提高。

The Properties of Particleboard for Modification Coated with Hydrolyzed Methyltrimethoxysilane(MTMS)Solution

Particleboard is a very important wood composite product used in furniture manufacturing,but the phenomena of warping deformation,thickness swelling and delamination are occurrence frequently while it is used in changing climates and in contact with liquid water or oil.In order to improve the humidity resistance and dimensional stability of particleboard,methyltrimethoxysilane(MTMS)was mixed with 0.1 mol/L hydrochloric acid in a 4∶1 v/v ratio and the mixture was then sonicated in an ice-bath for 360 minutes to induce hydrolysis.After hydrolysis,particleboards were immersed in the hydrolyzed MTMS solutions for 5 minutes.The properties of particleboards before and after coated with MTMS were measured and analyzed which were the wetting properties,ageing resistance,surface average roughness,surface chemical structure,physical and mechanical properties.The results showed that the particleboard coated with MTMS displayed a stable repellence for water and oil liquids and had ageing resistance.Furthermore,the dimensional stability,surface density and mechanical performance of modified particleboard were improved at the same time.