硬脂酰化纤维素纳米晶复合聚苯乙烯制备木材超疏水表面  

Preparation of Wood Superhydrophobic Surfaces from Stearoyl Cellulose Nanocrystals Compounded with Polystyrene

作　　者：汤相宇 陈旭 黄薇 王永贵[1] 肖泽芳[1] TANG Xiang-yu;CHEN Xu;HUANG Wei;WANG Yong-gui;XIAO Ze-fang(Key Laboratory of Bio-based Material Science and Technology(Ministry of Education),Northeast Forestry University,Harbin 150040,China)

机构地区：[1]东北林业大学生物质材料科学与技术教育部重点实验室,黑龙江哈尔滨150040

出　　处：《纤维素科学与技术》2022年第2期1-8,18,共9页Journal of Cellulose Science and Technology

基　　金：国家自然科学基金青年科学基金(31901247)。

摘　　要：通过酸水解微晶纤维素制备出纤维素纳米晶(CNC),并使用硬脂酰氯对其进行表面改性合成出硬脂酰化纤维素纳米晶(SCNC)。以SCNC为基本构筑单元,加入一定量的聚苯乙烯(PS),运用超分子自组装与喷涂法制备出SCNC-PS超疏水涂料用于木材超疏水改性。所制备出的超疏水木材接触角166±2°,滚动角5±2°,可以承受韦伯数为345的液滴冲击,且在165℃下具有优异的热稳定性能。聚苯乙烯的引入显著提高了表面的机械稳定性能,与未添加聚苯乙烯对照相比,在100个周期的砂纸磨损试验后接触角从106°提升至147°。Cellulose nanocrystals(CNC)was prepared by acid hydrolysis of microcrystalline cellulose,and stearoyl cellulose nanocrystals(SCNC)was synthesized by surface modification of stearoyl chloride.SCNC-PS superhydrophobic wood was prepared by applying supramolecular self-assembly method and spraying method with SCNC as the basic building block and adding a certain amount of polystyrene(PS).The prepared superhydrophobic wood has a contact angle of 165±2°and a sliding angle of 5±2°,which can withstand the impact of droplets with a Weber number of 345,and has excellent thermal stability performance at 165℃.The introduction of polystyrene significantly improved the mechanical stability of the surface,and the contact angle increased from 106°to 147°after 100 cycles of sandpaper abrasion test.

关 键 词：纤维素纳米晶 酯化反应 自组装 超疏水 木材 

分 类 号：O636.11[理学—高分子化学]