纯物理法制备高长径比纤维素纳米纤维的研究
发布时间：2019-03-11 19:05
【摘要】：为了制备具有高长径比、直径均一的纤维素纳米纤维,采用N-甲基吗啉-N-氧化物(NMMO)水溶液溶胀和超声波处理相结合的纯物理方法,研究了溶胀和超声波处理条件对纤维素裂纤效果的影响,得到制备纤维素纳米纤维的最佳工艺条件:NMMO水溶液质量分数为76%,溶胀温度为100℃,溶胀时间为4 h,超声时间为1 h。扫描电镜和透射电镜测试表明,所制得的纤维素纳米纤维为纤丝状,平均直径约30 nm,长度为几微米左右。X-射线衍射分析表明,所得纤维素纳米纤维为纤维素Ⅰ型结晶结构,结晶度较原料棉浆粕降低。
[Abstract]:In order to prepare cellulose nanofibers with high aspect ratio and uniform diameter, a pure physical method combining the swelling of N-methylmorpholine-N-oxide (NMMO) aqueous solution and ultrasonic treatment was adopted. The effects of swelling and ultrasonic treatment conditions on cellulose fiber cracking were studied. The optimum technological conditions for preparation of cellulose nanofibers were obtained as follows: mass fraction of NMMO aqueous solution was 76%, swelling temperature was 100 鈩，
本文编号：2438536
[Abstract]:In order to prepare cellulose nanofibers with high aspect ratio and uniform diameter, a pure physical method combining the swelling of N-methylmorpholine-N-oxide (NMMO) aqueous solution and ultrasonic treatment was adopted. The effects of swelling and ultrasonic treatment conditions on cellulose fiber cracking were studied. The optimum technological conditions for preparation of cellulose nanofibers were obtained as follows: mass fraction of NMMO aqueous solution was 76%, swelling temperature was 100 鈩，
本文编号：2438536
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