文献类型：期刊文献

中文题名：有机硅氧烷改性杨木纤维的制备及其表征

英文题名：Preparation and Characterization of Organosiloxane Modified Poplar Wood Fiber

作者：马红亮[1,2,3,4,5] 陈健[1,2,3,4,5] 焦健[1,2,3,4,5] 邓拥军[1,2,3,4,5] 孔振武[1,2,3,4,5] 房桂干[1,2,3,4,5]

第一作者：马红亮

机构：[1]中国林业科学研究院林产化学工业研究所;[2]生物质化学利用国家工程实验室;[3]国家林业局林产化学工程重点开放性实验室;[4]江苏省生物质能源与材料重点实验室;[5]南京林业大学江苏省林业资源高效加工利用协同创新中心

年份：2018

卷号：38

期号：6

起止页码：20-26

中文期刊名：林产化学与工业

外文期刊名：Chemistry and Industry of Forest Products

收录：CSTPCD;;Scopus;北大核心:【北大核心2017】；CSCD:【CSCD2017_2018】；

基金：国家重点研发计划资助项目(2017YFD0601004)

语种：中文

中文关键词：有机硅氧烷;杨木纤维;表面改性;疏水性

外文关键词：organosiloxane;poplar wood fiber;surface modification;hydrophobicity

分类号：TQ35

摘要：在卡斯特催化剂作用下,由乙烯基三甲氧基硅烷(VTMS)与1,1,1,3,5,5,5-七甲基三硅氧烷(MDHM)经硅氢加成反应合成了1,1,1,3,5,5,5-七甲基-3-[2-(三甲氧基硅烷基)乙基]三硅氧烷(HTEO),并采用红外光谱(FT-IR)和核磁共振氢谱(~1H NMR)表征了化学结构。以VTMS、HTEO分别对杨木纤维(PWF)进行表面改性,制得两种有机硅氧烷改性杨木纤维VPF和HPF,并利用FT-IR、扫描电镜(SEM)、X射线衍射(XRD)、X射线能谱(EDS)和接触角测量等表征及分析PWF改性前后的结构与表面性能。研究结果表明:杨木纤维经有机硅改性后,有机硅氧烷分子成功接枝到杨木纤维表面,改性杨木纤维的O/C值有所降低,Si含量明显增加,纤维表面变得粗糙,结晶度提高,吸湿性降低,疏水性得到明显提高; HPF的含Si量达5.92%,VPF、HPF的结晶度分别为72.0%和75.6%,相比PWF提高了14.8%和20.6%;水滴在VPF和HPF表面静置480 s后接触角分别为106°和134°。
1,1,1,3,5,5,5-heptamethyl-3-[2-(trimethoxysilyl)ethyl]trisiloxane(HTEO)was synthesized by hydrosilylation of vinyltrimethoxysilane(VTMS)and 1,1,1,3,5,5,5-heptamethyltrisiloxane(MDHM)in the presence of Custer catalysts,and the structure of HTEO was characterized by Fourier transform infrared spectroscopy(FT-IR)and nuclear magnetic resonance(1 H NMR)respectively.Then two kinds of organosiloxane modified poplar fibers(VPF and HPF)were prepared by surface modification of poplar fibers(PWF)with VTMS and HTEO.The chemical structure and surface properties of PWF before and after modification were investigated by FT-IR,scanning electron microscope(SEM),X-ray diffraction(XRD),X-ray energy dispersive spectrometer(EDS)and contact angle measurements,respectively.It was shown that the O/C value of the modified poplar fiber decreased,the content of Si increased obviously,and the surface of the fiber became rough.The hygroscopicity of the modified poplar fiber decreased and the hydrophobicity was improved.The Si content of HPF was 5.92%.The crystallinities of VPF and HPF were 72.0% and 75.6%,which increased by 14.8% and 20.6% respectively compared with that of PWF.The contact angles of water droplets on VPF and HPF surfaces after static 480 s were 106°and 134°,respectively.