新型间位芳纶基聚哌嗪酰胺复合纳滤膜的制备及性能研究

发布时间：2018-10-09 09:35

【摘要】：以聚间苯二甲酰间苯二胺(PMIA)为材料,通过相转化法制备了PMIA基膜,在此基础上,以哌嗪(PIP)溶液为水相单体,均苯三甲酰氯(TMC)正己烷溶液为有机相单体,通过界面聚合法制备了聚哌嗪酰胺复合纳滤膜。对膜表面的形貌及特征进行了表征分析,研究了单体含量、反应时间对复合膜性能的影响,并用4种无机盐溶液和3种染料对膜进行了性能评价。结果表明,在基膜表面成功聚合了一层聚酰胺功能层,该功能层具有良好的亲水性能。膜表面呈现荷负电性,对4种无机盐的截留顺序为Na_2SO_4MgSO_4MgCl_2NaCl。膜对酸性红B、活性黄3和直接耐晒蓝B2RL这3种染料的截留率可达到98%以上,表现出优异的脱色性能。
[Abstract]:The PMIA base membrane was prepared by phase inversion method from poly (isophthalyl resorcinenediamine) (PMIA). On the basis of this, piperazine (PIP) solution was used as aqueous monomer, and (TMC) n-hexane solution was used as organic phase monomer. Polypiperazinamide composite nanofiltration membrane was prepared by interfacial polymerization. The surface morphology and characteristics of the composite membrane were characterized and analyzed. The effects of monomer content and reaction time on the performance of the composite membrane were studied. The properties of the composite membrane were evaluated by four inorganic salt solutions and three dyes. The results showed that a polyamide functional layer was successfully polymerized on the substrate surface, and the functional layer had good hydrophilicity. The surface of the membrane showed negative charge and the retention order of the four inorganic salts was Na_2SO_4MgSO_4MgCl_2NaCl.. The rejection rate of the membrane to acid red B, active yellow 3 and direct blue B2RL can reach more than 98%, showing excellent decolorization performance.
【作者单位】：清华大学化学工程系化学工程国家重点联合实验室;中国科学院生态环境研究中心环境水质学国家重点实验室;
【基金】：国家自然科学基金(21576150,21476245) 科技部科研院所技术开发研究专项(2013EG111129) 清华大学科学基金(20131089399) 中国博士后科学基金
【分类号】：TQ051.893

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