疏水改性对杉木微观力学性能的影响  

Effects of hydrophobic modification on wood nanomechanical properties of Chinese fir

作　　者：杨蕊[1] 周定国[1] 王思群[2] 张洋[1] 冒海燕[1] 

机构地区：[1]南京林业大学材料科学与工程学院,南京210037 [2]美国田纳西大学再生碳中心

出　　处：《林业科技开发》2014年第3期78-81,共4页China Forestry Science and Technology

基　　金：林业公益性项目木制纤维化学材料及功能化技术(编号:201104004);国家自然科学基金青年科学基金项目(编号:31100417);江苏省自然科学基金青年基金项目(编号:BK20130975)

摘　　要：为提高木材尺寸稳定性,利用烷基烯酮二聚体对杉木进行疏水改性处理,同时运用纳米压痕技术分析评价疏水处理对木材纳米力学性能的影响。结果表明,当处理剂的质量分数为5%、处理时间为30 min时,疏水效果最好,同时最节约成本;疏水处理会降低杉木S2层细胞壁的弹性模量,当处理剂质量分数为5%时影响较小;杉木S2层细胞壁蠕变值会随处理剂质量分数和处理时间的增加呈现上升的趋势。Hydrophobic modification of China fir wood was performed by using alkyl ketene dimer （AKD） to improve its di- mensional stability. Nanoindentation technique was applied to evaluate the nanomechanical properties of the modified wood. The results showed that the treatment was cost effectively when the wood was treated by 5% AKD for 30 min. Hydrophobic modification lowered the elastic modulus of the S2 layer of the secondary cell wall, which was influenced the least when 5% AKD was adopted. The creep of S2 layer was found increasing with higher agent concentration and prolonged treatment time.

关 键 词：杉木 木材改性 疏水性 烷基烯酮二聚体 纳米压痕技术 

分 类 号：TS727.5[轻工技术与工程—制浆造纸工程]