摘要
为了研究离子液体在不同溶剂中对溶液特性及产物的影响,以聚乙烯醇缩丁醛(PVB)为溶质,甲酸丙酯和乙酸异丁酯分别作溶剂,采用静电纺丝法制备PVB纳米纤维。将添加剂N-乙基吡啶六氟磷酸盐[EPy][PF 6]分别添加到PVB/甲酸丙酯和PVB/乙酸异丁酯两种溶液中,研究离子液体在不同溶剂中对溶液电导率、粘度和表面张力的影响。结果表明:[EPy][PF 6]对两种溶液性质的改变主要是电导率的增加,在0.1%~0.9%(质量分数,下同)范围内,溶液的电导率与离子液体添加量成正比,PVB/甲酸丙酯溶液的电导率增幅远高于PVB/乙酸异丁酯。使用甲酸丙酯作溶剂,离子液体可以有效减小纤维直径,被用于制备直径更小的纳米纤维。
In order to study the effect of the addition of ionic liquids on solution properties and products in different solvents,PVB nanofibers were prepared by electrospinning method with PVB as solute and propyl formate and isobutyl acetate as the solvents,respectively.The same additive,N-ethylpyridinium hexafluorophosphate[EPy][PF 6],was added to the PVB/propyl formate and PVB/isobutyl acetate solutions respectively to study the effects of the same ionic liquid on the conductivity,viscosity and surface tension of solutions in different solvents.The results show that the change of the properties of the two solutions by adding[EPy][PF 6]is mainly due to the increase of conductivity.In the range of 0.1wt%—0.9wt%,the conductivity of the solutions are directly proportional to the amount of ionic liquid added,and the conductivity increase of PVB/propyl formate solution is much higher than that of PVB/isobutyl acetate.Using propyl formate as solvent,ionic liquid can effectively reduce the diameter of the fiber and be used to prepare nanofibers with smaller diameter.
作者
陈雪微
刘巍
高洪达
CHEN Xuewei;LIU Wei;GAO Hongda(School of Environmental Science and Engineering,Tiangong University,Tianjin 300387,China;State Key Laboratory of Separation Membranes and Membrane Processes,Tiangong University,Tianjin 300387,China;Tianjin Engineering Center for Safety Evaluation of Water Quality&Safeguards Technology,Tianjin 300387,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2020年第24期24160-24164,共5页
Materials Reports
基金
天津市教委科研计划项目(2018KJ200)。
