%0 Journal Article
%T 漂白竹浆疏水改性纳米纤丝化纤维素的制备和表征
%A 周静
%A 沈葵忠
%A 房桂干
%A 李漫
%A 林艳
%A 邓拥军
%J 林业工程学报
%D 2017
%R 10.13360/j.issn.2096-1359.2017.02.017
%X 纳米纤丝化纤维素(NFC)通过化学改性的方法可以赋予其特殊表面性质。研究以漂白竹浆为原料,采用机械(球磨机和高压均质机)和化学改性相结合的方法,制备改性纳米纤丝化纤维素(m-NFC)。在球磨中使用丁酰氯为酰基化试剂,N,N-二甲基甲酰胺(DMF)为分散剂,降低纤维尺寸的同时对纸浆纤维进行化学改性,再经高压均质机处理制备了取代度为2.07的m-NFC。利用激光粒度分析仪、原子力显微镜(AFM)、傅里叶红外光谱(FTIR)、X射线衍射仪(XRD)对m-NFC的结构和形态进行表征。均质20次最高压力80 MPa制备的m-NFC微纤丝长度为316.9 nm,直径分布在25～80 nm范围内,强物理机械力作用改变了m-NFC的晶体结构。改性后的m-NFC在低极性溶剂丙酮中具有较好的分散稳定性。研究结果可为纳米纤丝化纤维素应用于疏水性生物基质材料制备提供依据。</br>Nanofibrillated cellulose can be chemically modified for special properties. Hydrophobic nanofibrillated cellulose(m-NFC)was prepared by pretreating bleached bamboo pulp using butyl chloride as a modification reagent and DMF as a dispersant in planetary ball mill for a period of time. Subsequently, the obtained microfiber with surface substitution degree of 2.07 was passed through a high-pressure homogenizer. The modified NFC was characterized with atomic force microscopy(AFM), Fourier transform infrared spectroscopy(FTIR)and X-ray diffraction(XRD). The m-NFC obtained from 20 passed of the homogenizer with maximum pressure of 80 MPa had an average length of 316.9 nm and average diameters between 25 nm and 80 nm. The results of XRD showed that the degrees of crystallinity of m-NFC were changed as a result of the severe mechanical treatment. The m-NFC showed good dispersion stability in a low polar solvent of acetone. Hydrophobic modification of nanofibrillated cellulose has great development potential in hydrophobic substrate material
%K 纳米纤丝化纤维素
%K 纳米纤丝化纤维素改性
%K 取代度
%K 分散性&lt
%K /br&gt
%K nanofibrillated cellulose fiber
%K nanofibrillated cellulose fiber modification
%K degree of substitution
%K dispersion
%U http://lkkf.njfu.edu.cn//oa/darticle.aspx?type=view&id=201702017