摘要
采用化学交联的方法处理由扩散相转化法制备的聚酰亚胺(PI)膜,使之具有优良的耐非质子溶剂的能力。结果表明:当选用的化学交联剂为乙二胺(EDA)、己二胺(HDA)或对苯二甲胺(P)时,均能得到在非质子溶剂中保持稳定结构的PI膜。将经过化学交联和未经处理的PI膜置于DMF溶剂中浸泡48h后,经交联处理的PI膜结构仍保持其形态不变,对虎红钠盐(BR)的截留率也没有下降,而未经处理的膜发生破碎溶解现象。同时发现,EDA比HDA、P与PI的反应更剧烈,这是由于EDA分子是线性结构、而且它的分子体积比后两者要小;EDA交联得到的膜更加亲水,所以膜的通量变大,但EDA交联后得到的膜稳定性变差,易碎裂。
Aprotic solvent resistant polyimide membranes were prepared by phase inversion and then crosslinked u sing three different chemical crosslinking agents, 1,2-ethylenediamine （EDA）, 1,6-hexanediamine （HDA） and p^xylenedia- mine（P）. The resultant membranes were found to be stable in aprotic solvents. After immersed in DMF for 48 hours, there were not obvious effects on morphology and separation performance for crosslinked membranes. However, untreated mem- branes dissolved in DMF. Further, crosslinking reaction induced by EDA was much faster than that by HDA and P, because the EDA had a linear structure and smaller size than that of the latter two,membranes modified by EDA had increased hy- drophilicity and flux, however, membranes crosslinked using EDA were less stable and easily broken.
出处
《化工新型材料》
CAS
CSCD
北大核心
2014年第3期48-51,共4页
New Chemical Materials
基金
江苏省科技支撑计划-工业部分(SBE201300563)
江苏双创计划(苏组通〔2011〕37号)
南京工业大学材料化学工程国家重点实验室开放课题KL13-08资助
关键词
聚酰亚胺膜
非质子溶剂
交联
polyimide membrane,aprotic solvent,crosslinking
