马尾松热处理木材的表面特性研究  

Study on the Surface Characteristics of Pinus massoniana Heat-treated Wood

作　　者：谢桂军[1] 李腊梅 李兴伟[1] XIE Guijun;LI Lamei;LI Xingwei(Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization/Guangdong Academy of Forestry, Guangzhou,Guangdong 510520, China)

机构地区：[1]广东省森林培育与保护利用重点实验室/广东省林业科学研究院,广东广州510520

出　　处：《林业与环境科学》2018年第1期12-17,共6页Forestry and Environmental Science

基　　金：广东省省级科技计划项目"热处理木材霉变机制及预防处理技术的研究"(2014A040401043)

摘　　要：以马尾松(Pinus massoniana)为研究对象,分别在180,200,220℃条件下对其进行水蒸气热处理1,3,5 h。借助干燥器法测试不同温度热处理材的甲醛吸附量变化,利用程序升温化学吸附法、比表面积测试以及表面接触角方法探索不同温度处理的热处理材表面特性的变化规律。结果表明:与未热处理的素材相比,(1)热处理后的木材甲醛吸附性能得到改善,经180℃、1 h处理后的木材甲醛吸附性能最好,且随处理温度升高、时间延长,甲醛吸附性能降低,总体呈降低趋势;(2)热处理木材对甲醛的吸附不仅是物理吸附,还存在化学吸附;(3)不同温度处理后,木材的比表面积均减小;(4)经热处理后,极性的蒸馏水在木材表面的接触角较素材大且热处理的温度越高、表面接触角越大,而非极性的二碘甲烷在其表面的接触角变化趋势相反。The Pinus massoniana was studied by steam heat treatment at180,200,220℃for1,3,5h,respectively.Using dryer method to test the change of formaldehyde adsorption of different temperature heat-treated wood and using temperature programmed chemical adsorption,surface contact angle and surface testing method to explore the changing laws of heat treated wood surface characteristics that treated different temperature treatment.Theresults showed that:compared with non-heat treatment meterials,(1)the formaldehyde adsorption performance was improved after heat treatment,and when P.massoniana were treated at180℃for1h,the formaldehyde adsorption performance was best,and with the extension of processing temperature and time,the formaldehyde adsorption performance showed a trend of decrease overall;(2)the adsorption of formaldehyde by heat treatment wood was not only physical adsorption,but also chemical adsorption;(3)after treatment of different temperature,the wood's surface area decreased;(4)after heat treatment,the surface contact angle of polar distilled water on the wood surface was larger than the untreated material,and the higher the temperature of heat treatment,the greater the contact angle on its surface,while the surface contact angle of non-polar diiodomethane on the wood surface had the opposite trend.

关 键 词：热处理木材 甲醛吸附 比表面积 表面接触角 

分 类 号：S781.82[农业科学—木材科学与技术]