溶胶-凝胶法调控木材表面附着二氧化硅薄膜的研究

Research on Silicon Dioxide Film Adhered Wood Surface Modified by Sol-gel Method

采用溶胶-凝胶法使木材表面附着二氧化硅薄膜,以改良木材表面疏水性、抗老化性等性能。通过SEM、EDAX、FTIR等研究二氧化硅的形态、结构、分布及其与木材表面结合的方式等,使用抗老化性、润湿角表征二氧化硅改良材的表面性能。结果表明:木材表面附着一层厚度为40μm的二氧化硅薄膜,且薄膜的厚度随着浸渍时间的增加而增加。该二氧化硅薄膜具有疏水性,润湿角的平均值为101.6°,其润湿角随着浸渍时间的增加而增加,且改良材的润湿角在人工老化后,其变化量明显小于素材,抗老化性能得到了很大提高。改良材的抗光变色能力是素材的2倍以上。

Sol-gel method was used to improve the wood surface hydrophohicity and aging resistance by generating silicon dioxide film on wood surface.The morphology,structure,distribution of silicon dioxide and the way of combination with wood surface were studied by SEM,EDAX and I＇TIR.etc.The surface properties of silicon dioxide modified wood were characterized by the analysis of aging resistance and contact angle measurement.Results showed that the thickness of silicon dioxide film on the modified wood surface was about 40 pun and it increased with increase of dipping time.The film was hydrophobic,the average of contact angle was 101.6° and it increased with increase of dipping time.The contact angle variation of the modified wood was less than the plain sample obviously after aging,so the modified wood has better anti-aging performance.The anti-light discoloration abilities of modified wood were more than twice as much as the plain sample.