膜科学与技术

位置：首页 >> 期刊内容阅读

膜法海水提溴用PVDF中空纤维膜的研制

作者：李晓明，吕经烈，刘国昌，张召才，关毅鹏，郭春刚

单位：国家海洋局天津海水淡化与综合利用研究所

关键词：疏水性中空纤维膜; PVDF;相转化;后处理;海水提溴;

DOI号：

分类号： TQ028.8

出版年,卷(期):页码： 2011,31(5):13-17

摘要：

采用相转化法制备海水提溴用疏水性聚偏氟乙烯中空纤维膜,考察聚合物浓度、无机复合添加剂浓度、膜干燥方式及后处理方法对膜结构和性能的影响.结果表明,无机复合添加剂能有效提高膜机械性能，同时不影响膜疏水性；溶剂置换法不能完全避免膜收缩，从而直接影响膜孔结构和透气性能.物理后处理方法可显著提高膜透气性能，氮气通量为8.62m3•m-2•h-1，孔隙率为63.31%，膜断裂强度可达到1.64cN•Tex-1，膜断裂伸长率为79.10%.

Hydrophobic PVDF hollow fiber membranes for seawater bromine extraction were prepared by phase inversion method. The effects of membrane preparing conditions, such as PVDF concentration, composite inorganic additive concentration, drying methods and post-treatments on membrane structure and performance were investigated. The results showed that composite inorganic additive nearly would not affect membrane hydrophobicity, but could improve membrane mechanical property. Solvent-replacement methods could not completely prevent membrane shrinkage, which directly affecting membrane pore structure integrity and membrane permeability. Physical post-treatment was used to improve membrane permeability apparently. The Membrane N2 flux and porosity were 8.62m3•m-2•h-1 and 63.31% respectively, breaking strength was 1.64 cN•Tex-1 and breaking elongation was 79.10%.

基金项目：

中央级公益性科研院所基本科研业务费专项资金项目

作者简介：

李晓明(1980- ),女,辽宁朝阳人,硕士研究生,工程师,从事膜材料制备及应用研究.〈lixiaoming0618 @yahoo.com.cn〉

参考文献：

[1] Kai Yu Wang, Tai-Shung Chung, Marek Gryta. Hydrophobic PVDF hollow fiber membranes with narrow pore size distribution and ultra-thin skin for the freshwater production through membrane distillation[J]. Chemical Engineering Science, 2008,63(9):2587–2594.
[2] 李健生,王连军,赵宝昌,等.聚偏氟乙烯中空纤维膜的研制[J].水处理技术,2001,27(1):12-15.
[3] 武春瑞,郝福锦,贾悦,等.PVDF中空纤维疏水膜的鼓气吸收法海水提溴性能研究[J].功能材料,2009,40(9):
1563-1566.
[4] 董纪震,孙桐,古大治,等.合成纤维生产工艺学(上册) [M].北京:纺织工业出版社,1981:68-72.
[5] 沈新元,吴向东,李燕立,等.高分子材料加工原理[M].北京:中国纺织出版社,2000:75-77.
[6] Xiaoyao Tan, S.P. Tan, W.K. Teo, et al. Polyvinylidene fluoride (PVDF) hollow fibre membranes for ammonia removal from water[J]. J. Membr. Sci.,2006,271(1-2):59-68.
[7] 黄师荣,吴国忠,曾虹燕. LiCl添加剂对超临界CO2诱导相转化所形成的PVDF膜结构的影响[J].膜科学与技术,2009,29(2):28-33.
[8] Enrica Fontananova, Johannes C. Jansen, Alessandra Cristiano, et al. Effect of additives in the casting solution on the formation of PVDF membranes[J]. Desalination,2006,192(1-3):190–197.
[9] 李健生,梁祎,王慧雅,等. TiO2/PVDF复合中空纤维膜的制备和表征[J].高分子学报,2004,5:709-712.
[10] 王照旭,肖长发,胡晓宇,等.碳酸钙粒子对聚偏氟乙烯膜结构与性能的影响[J].天津工业大学学报,2008, 27(3): 56-59.
[11] 张裕卿,张红柳,曲云.填充纳米SiO2对聚偏氟乙烯膜性能的影响[J].膜科学与技术,2007, 27(6):47-51.

服务与反馈：

【文章下载】【加入收藏】

《膜科学与技术》编辑部地址：北京市朝阳区北三环东路19号蓝星大厦邮政编码：100029 电话：010-64426130/64433466 传真：010-80485372邮箱：mkxyjs@163.com