应用化工
應用化工
응용화공
APPLIED CHEMICAL INDUSTRY
2015年
4期
591-593,597
,共4页
纳米纤维素%微晶纤维素%制备%表征
納米纖維素%微晶纖維素%製備%錶徵
납미섬유소%미정섬유소%제비%표정
nanocrystal cellulose%microcrystalline cellulose%preparation%characterization
以微晶纤维素为原料，通过硫酸酸解制备获得了纳米纤维素。实验优选获得了酸解制备纳米纤维素的优化条件为：硫酸初始浓度35％，反应温度40℃，酸解时间90 min，此优化条件下，纳米纤维素的产率可达83．55％；SEM和TEM观察产物的形态外貌，确定为纳米级纤维素；XRD分析显示纳米纤维素的结晶度要高于微晶纤维素，而TG分析显示NCC的热稳定性要低于微晶纤维素。
以微晶纖維素為原料，通過硫痠痠解製備穫得瞭納米纖維素。實驗優選穫得瞭痠解製備納米纖維素的優化條件為：硫痠初始濃度35％，反應溫度40℃，痠解時間90 min，此優化條件下，納米纖維素的產率可達83．55％；SEM和TEM觀察產物的形態外貌，確定為納米級纖維素；XRD分析顯示納米纖維素的結晶度要高于微晶纖維素，而TG分析顯示NCC的熱穩定性要低于微晶纖維素。
이미정섬유소위원료，통과류산산해제비획득료납미섬유소。실험우선획득료산해제비납미섬유소적우화조건위：류산초시농도35％，반응온도40℃，산해시간90 min，차우화조건하，납미섬유소적산솔가체83．55％；SEM화TEM관찰산물적형태외모，학정위납미급섬유소；XRD분석현시납미섬유소적결정도요고우미정섬유소，이TG분석현시NCC적열은정성요저우미정섬유소。
Nanocrystal cellulose was prepared by sulfuric acid hydrolysis microcrystalline cellulose .The optimal conditions for the preparation of nanocrystal cellulose were chosen as follows :sulfuric acid initial concentration is 35%,reaction temperature is 40℃,and reaction time is 90 min.Under this condition ,the yield of nanocrystal cellulose reached 83.55%.The morphological structure of the product is verified to be nano-scale by SEM and TEM .Crystallinity of nanocrystal cellulose is higher than that of nanocrystal cellulose according to the results of XRD .The analysis of thermo gravimetric shows the thermal stability of nanocrystal cellulose is worse than microcrystalline cellulose .
