纤维素微纳颗粒的硅烷化改性对制备超疏水材料的影响

Effect of Silane Modified Cellulosic Micro-nano Particles on Super-hydrophobicity of Material

关键词:  纳米纤维素  纤维素微纳颗粒  硅烷化  超疏水  氟硅烷

Key Words:nanocellulose  superhydrophobic  micro-nano particle  silanization  fluoroalkyl silane

摘要:利用纤维素纳米晶（CNC）经过喷雾干燥得到纤维素微纳颗粒（CNCmp），再用甲基三甲氧基硅烷（MTMS）进行硅烷化改性，配制成超疏水涂料喷涂于定性滤纸上制成超疏水滤纸。实验结果表明，硅烷化改性对于制备超疏水滤纸具有重要影响，在自制的硅烷化反应装置中，当MTMS用量为70μL，反应温度为25℃，反应时间10 min，获得的硅烷化改性CNCmp可制备超疏水滤纸。同时发现，分别使用1H，1H，2H，2H-全氟辛基三乙氧基硅烷（PFOTES）和MTMS对CNCmp进行改性后制备超疏水滤纸的效果相近。

Abstract:The feature of superhydrophobic material surface is micro-nano structure coated with low surface energy substance.The prepared CNC was spray-dried to obtain micro-nanoparticles（CNCmp）， which was modified by chemical vapor deposition using MTMS.The modified CNCmps were used to prepare superhydrophobic coatings， and sprayed on the filter paper to form super-hydrophobic-filter-paper.The silanization reaction was critical for superhydrophobic coatings preparation.It was found that the amount of MTMS used in the silanization reaction in a designed device was optimized as 70 μL， the reaction temperature was 25℃， and the reaction time was 10 min. Silane modified micro-nanocellulose particles could be used to prepare superhydrophobic coatings.It was also found that there was no difference for the superhydrophobic materials prepared by modification using fluorosilane PFOTES and MTMS．