發(fā)布時(shí)間：2019-03-11 19:05

【摘要】：為了制備具有高長(zhǎng)徑比、直徑均一的纖維素納米纖維,采用N-甲基嗎啉-N-氧化物(NMMO)水溶液溶脹和超聲波處理相結(jié)合的純物理方法,研究了溶脹和超聲波處理?xiàng)l件對(duì)纖維素裂纖效果的影響,得到制備纖維素納米纖維的最佳工藝條件:NMMO水溶液質(zhì)量分?jǐn)?shù)為76%,溶脹溫度為100℃,溶脹時(shí)間為4 h,超聲時(shí)間為1 h。掃描電鏡和透射電鏡測(cè)試表明,所制得的纖維素納米纖維為纖絲狀,平均直徑約30 nm,長(zhǎng)度為幾微米左右。X-射線衍射分析表明,所得纖維素納米纖維為纖維素Ⅰ型結(jié)晶結(jié)構(gòu),結(jié)晶度較原料棉漿粕降低。
[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，

本文編號(hào)：2438536