Hydrophobic modification of cellulose nanocrystal via covalently grafting of castor oil

被引:0
作者
Wulin Shang
Jin Huang
Huan Luo
Peter R. Chang
Jiwen Feng
Guangyong Xie
机构
[1] Wuhan University of Technology,College of Chemical Engineering
[2] Chinese Academy of Science,State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Center for Magnetic Resonance, Wuhan Institute of Physics and Mathematics
[3] Agriculture and Agri-Food Canada,BioProducts and Bioprocesses National Science Program
[4] South-Central University for Nationalities,Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission and Ministry of Education, College of Chemistry and Materials Science
来源
Cellulose | 2013年 / 20卷
关键词
Cellulose nanocrystal; Castor oil; Grafting; Hydrophobicity;
D O I
暂无
中图分类号
学科分类号
摘要
Hydrophobic cellulose nanocrystals (CNs) have been prepared by grafting isocyanate-terminated castor oil, a kind of natural vegetable oil, onto their surface. The existence of castor oil component in the modified cellulose nanocrystals was verified by Fourier transform infrared spectroscopy, solid-state 13C NMR spectra and X-ray photoelectron spectroscopy. At the same time, X-ray diffraction and transmission electron micrographs further proved that the crystalline structure and large aspect ratio of cellulose nanocrystals were essentially preserved after chemical grafting. Furthermore, the surface of modified cellulose nanocrystals appeared to be hydrophobic as indicated by contact angle measurements. The value of the polar component of surface energy decreased from 21.5 mJ/m2 to almost zero via grafting castor oil. These novel hydrophobic castor oil-grafted cellulose nanocrystals appear as valuable alternatives to formulate bionanocomposites with non-polar polymers for optimized performances.
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页码:179 / 190
页数:11
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