纳米纤丝化纤维素制备及硅烷化改性

以脱脂棉为原料, 高压均质法制备纳米纤丝化纤维素(NFC), 并以三甲基氯硅烷和十八烷基三氯硅烷为改性剂,分别对NFC进行硅烷化改性。采用透射电子显微镜(TEM)、傅里叶变换红外光谱(FT-IR)、X射线衍射光谱(XRD)、扫描电子显微镜(SEM)对NFC和硅烷化改性NFC的超微形貌和结构等进行表征。研究结果表明NFC超微形貌呈纤丝状, 直径尺寸大多为20 nm, 长度尺寸主要分布在500~1 000 nm, 结构为纤维素Ⅰ型;FT-IR和SEM分析结果表明所制备的硅烷化改性NFC中, 150 μL三甲基氯硅烷改性NFC的改性效果较好, 其超微形貌呈纤丝状。

Preparation and Silanization Modification of Nanofibrillated Cellulose

Nanofibrillated cellulose(NFC) was prepared by high pressure homogenization method with absorbent cotton as raw materials.NFCs modified with chlorotrimethylsilane(TMCS) and octadecyltrichlorosilane were prepared respectively.Ultrastructral morphologies and structures of NFC,and silanization modified NFC were characterized by transmission electron microscopy(TEM),fourier transform infrared spectroscopy (FT-IR),X-ray diffraction spectroscopy(XRD),scanning electron microscopy(SEM),respectively.The research results show that the ultrastructral morphology of NFC is fibrillar,and its diameter is mostly about 20 nm,its length is mainly distributed in 500-1 000 nm,and its structure is cellulose type I.The results of FT-IR and SEM analysis show that the modified effect of 150 μL TMCS is better than others in the silanization modifications,and the ultrastructral morphology of the accordingly modified NFC is fibrillar.