纳米纤维素接枝环氧基的制备与表征  

Preparation and Characterization of Nanocellulose Grafted Epoxy Groups

作　　者：巩桂芬[1] 卢馨 张帆 Guifen Gong, Xin Lu, Fan Zhang(College of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China)

机构地区：[1]哈尔滨理工大学材料科学与工程学院,哈尔滨150040

出　　处：《高分子材料科学与工程》2018年第9期58-62,共5页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(51372128)

摘　　要：以微晶纤维素(MCC)为原料,采用酸水解法制备纳米纤维素(NCC),再以N,N-羰基二咪唑(CDI)活化纳米纤维素表面的羟基,最后将其与环氧氯丙烷进行接枝反应,得到接枝环氧基的纳米纤维素(NCC-g-ECH)。采用透射电镜、红外光谱、溶解性、接枝率、X射线衍射对所制得的样品NCC和NCC-g-ECH的结构和性能进行表征。结果表明,实验制得的NCC符合纳米尺寸; NCC-g-ECH的红外图中出现明显的环氧基峰; NCC-g-ECH的接枝率最大达到8. 47%;与NCC相比,样品NCC-g-ECH在丙酮中能均匀、稳定地分散; NCC和NCC-g-ECH均为纤维素Ⅰ晶型,NCC-g-ECH的结晶度比NCC减小8. 59%。First, the microcrystalline cellulose was treated with acid hydrolysis to prepare nanocellulose（NCC）. Then, NCC was activated with N, N-carbonyldiimidazole（CDI）. Finally, preparation of NCC grafted epoxy groups （NCC^g-ECH） with epichlorohydrin （ECH） and activated NCC. The structure and performance of NCC and NCC-g- ECH were characterized by TEM, FT-IR, XRD and solubility testing, grafting rate, the obtained experimental results show that the scale of NCC prepared in the experiment is nanoscale. The infrared spectra of NCC-g-ECH show significant ester and epoxy peaks, and the highest grafting rate is 8.47 %. NCC-g-ECH can be even and stable in acetone. The crystal of NCC and NCC-g-ECH is cellulose type I , and compared with NCC, the crystallinity of J NCC-g-ECH is decreased by 8.59 %.

关 键 词：纳米纤维素 N N-羰基二咪唑 环氧基 接枝 

分 类 号：TQ352.79[化学工程]