木材酯化及接枝共聚处理对木材表面自由能影响的研究  

A STUDY ON EFFECT OF ESTERIFICATION AND GRAFT COPOLYMERIZATION PROCESS ON SURFACE FREE ENERGY OF WOOD

作　　者：秦特夫[1] 阎昊鹏[1] 

机构地区：[1]中国林业科学研究院木材工业研究所,北京100091

出　　处：《林业科学》2001年第2期97-100,共4页Scientia Silvae Sinicae

基　　金：国家自然科学基金!(编号为 39770 5 98)

摘　　要：采用接触角测定法 ,对经用乙酰化法酯化和苯乙烯单体接枝共聚处理改性前后的杉木和杨树表面接触角的变化和表面自由能变化值进行了研究。确定了木材的酯化和接枝共聚改性对木材表面自由能变化的影响因素。研究结果表明 :在酯化和接枝改性处理后 ,液体在杉木和杨木表面上的接触角比在未经处理的木材表面的接触角有所增大。酯化处理所产生的接触角增大作用要比接枝共聚所产生的作用大 ;杉木和“三北一号”杨的表面自由能分别为 4 2 8mN m和 52 3mN m与大部分木材的表面自由能相近 ;木材的酯化和接枝共聚改性可以降低木材的表面自由能 ,但酯化对表面自由能的降低程度受树种的影响 。In this paper,the change of contact angle and surface free energy of two species of wood Chinese fir ( Cunninghamia lanceolata ) and Poplar Sanbei No.1( Populus nigra×P.simonii cv.`Zhonglin Sanbei-1')before and after acetylation and graft copolymerization of 1-Phenylethene were investigated.The effects of esterification and graft copolymerization on surface free energy of wood were analyzed.The result showed that the contact angle of liquid on the surface of two species of wood is enlarged after the process of estrification and graft copolymerization.The effect of the esterification on contact angle is obviously bigger than that of graft copolymerization.The surface free energy of Chinese fir and Poplar Sanbei No.1 are 42.8mN/m and 52.3mN/m respectively,which are similar to most other species of wood.The surface free energy is reduced after esterification and graft copolymerization process,the reduce degree of esterification is affected with different species,but the reduce degree of graft coplymerization is hardly affected with species.

关 键 词：表面润湿性 表面自由能 接触角 酯化 接枝共聚 木材改性 

分 类 号：S781.7[农业科学—木材科学与技术] TQ316.6[农业科学—林学]