乳化脱脂及硅烷化封闭对樟子松木材表面性能的影响  

Effect of Emulsion Degreasing and Silanization Sealing on the Surface Properties of Pinussylvestris var.mongolica Wood

作　　者：于新栋 孙永平 柴希娟[1,2] 徐开蒙[1,2] 解林坤[1,2] Yu Xindong;Sun Yongping;Chai Xijuan;Xu Kaimeng;Xie Linkun(College of Materials and Chemical Engineering,Southwest Forestry University,Kunming Yunnan 650233,China;Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products,Southwest Forestry University,Kunming Yunnan 650233,China)

机构地区：[1]西南林业大学材料与化学工程学院,云南昆明650233 [2]西南林业大学云南省木材胶黏剂及胶合制品重点实验室,云南昆明650233

出　　处：《西南林业大学学报（自然科学）》2024年第6期177-183,共7页Journal of Southwest Forestry University：Natural Sciences

基　　金：国家自然科学基金项目(32360357,31760184)资助;云南省农业基础研究联合专项重点项目(202101BD070001−011)资助。

摘　　要：采用不同质量浓度的月桂醇聚醚硫酸脂钠(AES)复配乳液对樟子松木材进行蒸煮脱脂后,用水解不同时间的甲基三甲氧基硅烷(MTMS)溶液对脱脂材进行封闭处理,测定木材的脱脂率和溢脂率,分析素材、脱脂材和脱脂−封闭材的表面化学结构、润湿性及力学性能。结果表明:脱脂率随AES浓度的增加而增加,当AES浓度为2.5%时,脱脂率达39.0%,溢脂率仅为1.0%;脱脂−封闭材表面出现了低表面能的Si—CH3特征吸收峰,其表面水和油的接触角大小、静置稳定性随MTMS水解时间的延长而提高;脱脂−封闭材的24 h吸水率[(51±4)%]显著小于素材[(60±5)%],顺纹抗压强度与素材相比略有增加。The Pinussylvestris var.mongolica wood was degreased by cooking with different mass concentrations of sodium laureth sulfate(AES)compound emulsion,and then the degreased wood was closed with methyltrimethoxysilane(MTMS)solution hydrolyzed for different time.The degreasing rate and overflow rate were measured,and the surface chemical structure,wettability,and mechanical properties of control,degreased and degreased-closed wood were analyzed.The results showed that the degreasing rate increased with the increase of AES concentration.When the AES concentration was 2.5%,the degreasing rate reached 39.0%,and the fat spillage rate was only 1.0%.Low surface energy Si—CH3 characteristic absorption peaks appeared on the surface of the degreased-closed wood,and the contact angle between water and oil on the surface as well as the static stability increased with the increase of the hydrolysis time of MTMS.The 24 h water absorption of degreased-closed wood,which was(60±5)%,decreased significantly compared with the control wood,which was(51±4)%,and the compressive strength parallel to the grain increased slightly.

关 键 词：樟子松 木材 乳化脱脂 甲基三甲氧基硅烷 润湿性 力学性能 

分 类 号：S781.7[农业科学—木材科学与技术]