摘要
复合纳滤膜(NF)具有多层结构,在恶劣环境中使用时容易分层,稳定性差。实验通过界面聚合法制备了复合纳滤膜,研究了该复合纳滤膜的分离性能和稳定性。将DOPA-TMC和DOPA/PIP-TMC纳滤膜在乙醇中浸泡12 d后,复合纳滤膜对刚果红的截留率仅仅下降了1.76%和1.22%(初始值99.86%、99.92%)。此外,将DOPA-TMC和DOPA/PIP-TMC纳滤膜浸泡在活性氯溶液中240 h后,仍然保持高分离性能。该纳滤膜在乙醇中具有长期的结构稳定性,在次氯酸钠溶液中具有良好的化学稳定性,在整个实验过程中未出现分层现象。
Composite nanofiltration(NF)membranes tend to delaminate and have a poor stability while applied to harsh environments due to the multi-layered structure.In this study,dopamine(DOPA)was employed to prepare NF membranes via interfacial polymerization.The separation performance and stability of NF membranes were investigated,respectively.After soaking in ethanol solvent for 12 d of both DOPA-trimesoyl chloride(TMC)NF membranes and DOPA/piperazine(PIP)-TMC NF membranes,the rejection rate of Congo red is only decreases by 1.76%and 1.22%(the original of 99.86%and 99.92%),respectively.Moreover,the separation performances of both DOPA-TMC NF and DOPA/PIP-TMC NF membranes are still excellent after soaking in the active chlorine solution for 240 h(12 g·L-1·h).The NF membranes exhibit a long-term structural stability in ethanol and a considerable chemical stability in sodium hypochlorite solution.In particular,no delamination is observed in the above experiments.
作者
高钰冰
伍丽萍
盖景刚
Yubing Gao;Liping Wu;Jinggang Gai(Polymer Research Institute of Sichuan University,State Key Laboratory of Polymer Materials Engineering,Chengdu 610065,China)
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2019年第5期164-170,共7页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(51473097,51003067)
高分子材料工程国家重点实验室开放课题基金资助(sklpme2014-3-14)
关键词
分层
纳滤
多巴胺
界面聚合
稳定性
delamination
nanofiltration
dopamine
interfacial polymerization
stability
