【作者】 李培欣； 张桂芳； 赵义平； 陈莉； 冯霞； 付维贵；

【Author】 LI Peixin,ZHANG Guifang,ZHAO Yiping,CHEN Li,FENG Xia,FU Weigui (School of Materials Science and Engineering,State Key Laboratory of Hollow Fiber Membrane Materials and Processes,Tianjin Polytechnic University,Tianjin,300160,China)

【机构】 天津工业大学材料科学与工程学院,中空纤维膜材料与膜过程省部共建国家重点实验室培育基地；

【摘要】 本文通过对凹凸棒土进行酸处理,然后用十六烷基三甲基溴化铵(CTAB)进行有机改性制备出改性凹凸棒土,进而与聚偏氟乙烯(PVDF)共混,通过浸没沉淀相转化法制备了一种新型的PVDF/凹凸棒土复合分离膜。采用红外光谱(FT-IR)、X-射线衍射(XRD)对凹凸棒土处理前后的结构变化进行了表征,进而研究了复合膜的结构、纯水通量、亲水性及对重金属离子的吸附性能等。研究结果表明,改性后CTAB可以成功包裹在凹凸棒土的表面;与纯PVDF分离膜相比,复合膜的亲水性增强,其对重金属离子Ni(Ⅱ)的吸附能力有较大提高;添加酸化土制备的复合膜吸附性能较好。更多还原

【Abstract】 In this paper,attapulgite (ATP) was treated with hydrochloric acid and then modified by CTAB.A novel composite membrane of poly(vinylidene fluoride) and ATP (PVDF/ATP) was prepared by the method of immersion precipitation phase inversion.The structural evolution of attapulgite before and after modification was confirmed by Fourier transform infrared spectroscopy,X-ray diffraction and so on.The structure,water flux,hydrophilicity and adsorption performance of composite membrane were investigated.The results indicated that CTAB is successfully enwrapped on the surface of the attapulgite.Compared with pure PVDF membrane,the composite membranes exhibits a better hydrophilicity and adsorption on Ni(Ⅱ) ion,in which the PVDF/acidified ATP membrane is best.更多还原