竹材表面润湿性能研究

以毛竹为研究对象,通过表面改性措施,增加毛竹界面的润湿性,达到直接胶接热压的目的。改性方法主要有酸处理、碱处理和等离子体处理,3种方法通过不同试验水平处理后,通过接触角的测定表征竹材界面润湿性的处理效果。酸处理对表面的接触角影响较大,竹青最大降幅为53.6%,竹黄为23.0%。碱处理后,竹青最大降幅为48.4%,竹黄为18.5%,略次于酸,效果明显。等离子体用较短的时间处理,竹青接触角即可显著降低,界面润湿性有很大提高,但竹黄面处理前后接触角的差异较小。综合得出,HCl处理效果最佳,NaOH处理次之,相对酸碱处理,等离子体处理效果较弱。3种处理方法均是竹青接触角的降幅很明显,竹黄次之。

Study on Wettability of Bamboo Surface

With Phyllostachys pubescens as the research object,the aim of direct bonding pressing by the method of surface modification and increasing wetting property of bamboo interface was reached.There are mainly three kinds of modified methods: the acid treatment,alkali treatment and plasma processing.After three different levels of experiment,it showed the effect of wetting property of bamboo interface through measuring the contact angle.The analysis results indicated that acid has considerable influence on the outer bamboo surface,the maximum declining rate of outer surface of bamboo is 53.6% and interior bamboo is 23.0%;and alkali is inferior to acid,which shows the maximum declining rate of outer surface of bamboo is 48.4% and interior bamboo is 18.5%;and comparing with the above methods,the plasma experiment is used the minimum of time,the contact angle of the outer bamboo surface declined evidently and the interior wetting property also increased,but there is small discrepancy on the interior contact angle after the experiment.Of all the three treatments,HCl is the best,NaOH is the second,and plasma treatment is inferior than the other two.The three experiments also showed that the bamboo surface contact angle declined obviously than the interior of bamboo.