摘要
纤维素不易溶于普通溶剂,难以直接静电纺丝得到纤维素纳米纤维(CNF),故首先采用静电纺丝制备醋酸纤维素(CA)纳米纤维,然后对其进行碱处理以制备CNF,研究了碱溶液组成、浓度及时间对处理效果的影响,分析了CA纳米纤维和CNF的结晶结构及热学性能。结果表明,当氢氧化钠碱溶液中v(乙醇)∶v(水)=2∶1、处理液浓度为0.5 mol/L、处理时间为0.5 h时,处理效果最佳。经过碱处理得到的CNF表面均匀光滑,平均直径为583 nm,具有纤维素Ⅰ型和Ⅱ型晶体结构的特征,无明显玻璃化转变温度。
Cellulose is difficult to dissolve in ordinary solvents and electrospin into cellulose nano-fibers（CNFs） directly,so the cellulose acetate（CA） nanofibers were prepared by electrospinning firstly,and then subjected to alkali treatment to obtain CNFs.The influences of the composition and concentration of alkali solution and treating time on the treatment result were studied,and the crystal structure and thermal properties of CA nanofibers and CNFs were analyzed.It was found that when the volume fraction of ethanol and water is 2∶1 in the alkali solution with sodium hydroxide（NaOH）,with concentration 0.5 mol/L and treating time 0.5 h,the optimum results were achieved.After alkali treatment,the CNFs exhibited smooth and uniform surface with an average diameter of 583 nm and features of celluloseⅠand Ⅱ crystal structures,and had no obvious glass transition temperature.
出处
《纺织学报》
EI
CAS
CSCD
北大核心
2013年第9期6-11,共6页
Journal of Textile Research
基金
江苏高校优势学科建设工程资助项目(苏政办发(2011)6号)
苏州市科技计划项目(ZXG2012043)
