聚全氟乙丙烯中空纤维膜制备及其膜蒸馏过程*

doi:10.11901/1005.3093.2013.725

材料研究学报

2014, Vol. 28

Issue (5): 353-361 DOI: 10.11901/1005.3093.2013.725

本期目录 | 过刊浏览

聚全氟乙丙烯中空纤维膜制备及其膜蒸馏过程*

吴艳杰,肖长发(

),黄庆林,陈凯凯

天津工业大学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天津工业大学材料科学与工程学院天津 300387

FEP Hollow Fiber Membrane and Its Membrane Distillation Process

Yanjie WU,Changfa XIAO(

),Qinglin HUANG,Kaikai CHEN

Department of Materials Science and Engineering, Tianjin Polytechnic University, State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Tianjin Polytechnic University, Tianjin 300387

引用本文:

吴艳杰,肖长发,黄庆林,陈凯凯. 聚全氟乙丙烯中空纤维膜制备及其膜蒸馏过程*[J]. 材料研究学报, 2014, 28(5): 353-361.
Yanjie WU, Changfa XIAO, Qinglin HUANG, Kaikai CHEN. FEP Hollow Fiber Membrane and Its Membrane Distillation Process[J]. Chinese Journal of Materials Research, 2014, 28(5): 353-361.

全文: PDF(7256 KB) HTML

摘要:

以聚全氟乙丙烯(FEP)为成膜聚合物, 采用熔融纺丝-拉伸法制备FEP中空纤维膜, 研究了后拉伸倍数对FEP中空纤维膜结构与性能的影响。结果表明, 初生FEP中空纤维膜结构较为致密, 拉伸后出现微孔结构。随着拉伸倍数的提高膜的孔隙率和氮气通量明显增大, 而液体渗透压(LEP)有所降低。将所得FEP中空纤维膜用于减压膜蒸馏(VMD)研究, 并将其与常规熔融纺丝-拉伸法聚丙烯(PP)中空纤维膜比较。结果表明, 所得FEP中空纤维膜的疏水性能、液体渗透压力和力学强度均优于PP中空纤维膜。较强的疏水性能使其稳定运行而不被液体渗透, 脱盐率稳定在99%以上。同时, FEP中空纤维膜具有较大的内径(0.74 mm), 在保证较高脱盐率前提下可采用内压式减压膜蒸馏, 且真空膜蒸馏通量随着进料温度的升高显著增高。

关键词 ：有机高分子材料, 聚全氟乙丙烯(FEP), 中空纤维膜, 聚丙烯(PP), 膜蒸馏, 脱盐率

Abstract：

The influence of draw ratio on the structure and properties of poly(tetrafluoroethylene-co-hexafluoropropylene) (FEP) hollow fiber membrane which was fabricated by melt-spinning stretching (M-S) method was investigated in this article. The primary FEP hollow fiber membrane structure was compact while the porous structure occurs after stretching. Furthermore, the increase of membrane draw ratios induced the obvious increase of membrane porosity and the N₂ flux while the decrease of the liquid entrance pressure (LEP). Meanwhile, the FEP hollow fiber membrane was applied to the vacuum membrane distillation (VMD) process to compared with M-S PP hollow fiber membrane which was the commercial product. The results show that the hydrophobic properties, LEP and mechanical strength of FEP hollow fiber membrane was better than PP hollow fiber membrane. The strong and stable of hydrophobic properties enabled the FEP membrane unpenetrated, which kept the desalination rate maintain up to 99%. The larger inner diameter (about 0.74 mm) of FEP hollow fiber membrane induced the use of internal pressure VMD type which brought about the higher VMD flux when the feed temperature increased.

Key words： organic polymer materials poly(tetrafluoroethylene-co-hexafluoropropylene) (FEP) hollow fiber membrane polypropylene (PP) membrane distillation desalination rate

收稿日期: 2013-09-30

基金资助:* 国家重点基础研究发展计划项目2012CB722706,国家自然科学基金20874073 和天津市应用基础与前沿技术研究计划重点项目12JCZDJC26600资助。

	服务

	把本文推荐给朋友
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	吴艳杰
	肖长发
	黄庆林
	陈凯凯
44.8K

链接本文:

https://www.cjmr.org/CN/10.11901/1005.3093.2013.725 或 https://www.cjmr.org/CN/Y2014/V28/I5/353

图1 FEP中空纤维膜纺丝流程图

表1 中空纤维膜结构参数

图2 中空纤维膜N2通量测试仪

图3 中空纤维膜液体渗透压测试流程图

图4 VMD装置流程图

表2 不同拉伸条件FEP膜的液体渗透压力

表3 PP和FEP中空纤维膜透过性能参数

表4 FEP和PP中空纤维膜的孔隙率

图5 PP和FEP中空纤维膜静态接触角照片

图6 PP中空纤维膜的微观形貌

图7 FEP中空纤维膜的微观形貌

图8 不同拉伸倍数FEP中空纤维膜的表面形貌

图9 FEP中空纤维膜的应力-应变曲线

图10 PP中空纤维膜的应力-应变曲线

图11 水通量随时间的变化

图12 脱盐率随时间的变化

图13 温度对FEP中空纤维膜蒸馏通量的影响. 1-90℃, 2-80℃, 3-70℃, 4-60℃

图14 FEP组件在不同温度条件下的平均通量变化

图15 温度对FEP组件脱盐效果的影响

1	WANG Xvyun,Preparation of PVDF hydrophobic membrane and study on membrane distillation integrated technique, Ph.D. thesis, Zhejiang University(2008)
1	(王许云,PVDF疏水膜制备及膜蒸馏集成技术研究, 博士学位论文, 浙江大学(2008))
2	C. Cabassud, D. Wirth,Membrane distillation for water desalination: how to choose an appropriate membrane, Desalination 157, 307(2003)
3	JIN Wangyong,WU Yier, ZHU Hailin, Studied on super-hydrophobic modification of polytetrafluoroethylene flat membrane and its application to membrane distillation , Technology Water Treatment, 138(8), 23(2012)
3	(金王勇, 吴益尔, 朱海霖, 聚四氟乙烯平板膜超疏水改性及在膜蒸馏中的应用研究, 水处理技术, 138(8), 23(2012))
4	K. W. Lawson, D. R. Lloyd,Membrane distillation, Journal of Membrane Science, 124, 1(1997)
5	Q. L. Huang, C. F. Xiao, X. Y. Hu,Study on the preparation of polytetrafluoroethylene hollow fiber membranes and the properties, Advanced Materials Research, 143, 106(2011)
6	Abdullah Alkhudhiri,Naif Darwish, Nidal Hilal, Membrane distillation, Desalination, 287, 2(2012)
7	E. Drioli, A. Ali, S. Simone,Novel PVDF hollow fiber membranes for vacuum and direct contact membrane distillation applications, Separation and Purification Technology, 115, 27(2013)
8	El-Bourawim S,Ding Z, Ma R, A frame-work for better understanding membrane distillation separation process, Journal of Membrane Science, 285, 4(2006)
9	S. Simone, A. Figoli, A. Criscuoli, M. C. Carnevale, A. Rosselli, E. Drioli. Preparation of hollow fibre membranes from PVDF/PVP blends their application in VMD, Journal of Membrane Science, 364, 219(2010)
10	L. Song, B. Li, K. K. sirkar, J. L. Gilron,Direct contact membrane distillation-based desalination: novel membranes, devices, large-scale studies, and a model, Industrial Engineering and Chemical Research, 46, 2307(2007)
11	H. L. Zhu, H. J. Wang, F. Wang,Preparation and proportion of PTFE hollow fiber membranes for desalination through vacuum membrane distillation, Journal of Membrane Science, 446, 145(2013)
12	Maksyln N., Chemyshov G., WytZe M.,Haanc B, Modelling temperature and salt concentration distribution in membrane distillation feed channel, Desalination, 157, 315(2003)
13	M. S. El-Bourawi, Z. Ding, R. Ma, M. Khayet,A framework for better understanding membrane distillation separation process, Journal of Membrane Science, 285, 4(2006)
14	T. Mohammadi, M. Akbarabadi,Separation of ethylene glycol solution by vacuum membrane distillation(VMD), Desalination, 181, 35(2005)
15	Q. L. Huang, C. F. Xiao, X. Y. Hu, S. L. An,Fabrication and properties of poly (tetrafluoroe thylene-co-hexafluoropropylene)hollow fiber membranes, Journal of Materials Chemistry, 21(41), 16510(2011)
16	MIAO Zhongqing,XIAO Changfa, HUANG Qinglin, Studies on poly(tetrafluoroethylene-co-hexafluoropropylene)hollow fiber membranes, Acta Polymerica Sinica, 12, 1423(2012)
16	(苗中青, 肖长发, 黄庆林, 聚全氟乙丙烯中空纤维膜研究, 高分子学报, 12, 1423(2012))
17	LI Jiansheng,LIANG Yi, WANG Huiya, SUN Xiuyun, WANG Lianjun, Preparation and characterization of TiO2/PVDF composite hollow fiber membrane, Acta Polymerica Sinica, 5, 709(2004)
17	(李建生, 梁祎, 王慧雅, 孙秀云, 王连军, TiO2/PVDF复合中空纤维膜的制备和表征, 高分子学报, 5, 709(2004))

[1]	叶姣凤, 王飞, 左洋, 张钧翔, 罗晓晓, 冯利邦. 兼具高强度、高韧性和自修复性能的环氧树脂改性热可逆聚氨酯[J]. 材料研究学报, 2023, 37(4): 257-263.
[2]	李瀚楼, 焦晓光, 朱欢欢, 赵晓欢, 矫庆泽, 冯彩虹, 赵芸. 支链含氟聚酯的合成和性能[J]. 材料研究学报, 2023, 37(4): 315-320.
[3]	马逸舟, 赵秋莹, 杨路, 裘进浩. 热塑型聚酰亚胺/聚偏氟乙烯全有机复合薄膜的制备及其介电储能[J]. 材料研究学报, 2023, 37(2): 89-94.
[4]	殷洁, 胡云涛, 刘慧, 杨逸霏, 王艺峰. 基于电沉积技术构建聚苯胺/海藻酸膜及电化学性能研究[J]. 材料研究学报, 2022, 36(4): 314-320.
[5]	申延龙, 李北罡. 磁性氨基酸功能化海藻酸铝凝胶聚合物的制备及对偶氮染料的超强吸附[J]. 材料研究学报, 2022, 36(3): 220-230.
[6]	龙庆, 王传洋. 不同碳黑含量PMMA的热降解行为和动力学分析[J]. 材料研究学报, 2022, 36(11): 837-844.
[7]	蒋平, 吴丽华, 吕太勇, José Pérez-Rigueiro, 王安萍. 蜘蛛大壶状腺丝的反复拉伸力学行为和性能[J]. 材料研究学报, 2022, 36(10): 747-759.
[8]	鄢俊, 杨进, 王涛, 徐桂龙, 李朝晖. 有机硅油改性水性酚醛的制备及其性能[J]. 材料研究学报, 2021, 35(9): 651-656.
[9]	张昊, 李帆, 常娜, 王海涛, 程博闻, 王攀磊. 羧酸型接枝淀粉吸附树脂的制备和对染料的去除性能[J]. 材料研究学报, 2021, 35(6): 419-432.
[10]	孙丽颖, 钱建华, 赵永芳. AgNWs-TPU/PVDF柔性薄膜电容传感器的制备和性能[J]. 材料研究学报, 2021, 35(6): 441-448.
[11]	唐开元, 黄洋, 黄湘舟, 葛颖, 李娉婷, 袁凡舒, 张威威, 孙东平. 碳化细菌纤维素的理化性质及其在甲醇电催化中的应用[J]. 材料研究学报, 2021, 35(4): 259-270.
[12]	苏晨文, 张婷玥, 郭丽伟, 李乐, 杨苹, 刘艳秋. 用于模拟细胞外基质的硫醇-烯水凝胶的制备[J]. 材料研究学报, 2021, 35(12): 903-910.
[13]	张向阳, 章奇羊, 汤涛, 郑涛, 柳浩, 刘国金, 朱海霖, 朱海峰. 基于MOFs的复合材料制备及其对亚甲基蓝染料的吸附性能[J]. 材料研究学报, 2021, 35(11): 866-872.
[14]	万里鹰, 肖洋, 张伦亮. 基于热可逆Diels-Alder动态共价键PU-DA体系的制备和性能[J]. 材料研究学报, 2021, 35(10): 752-760.
[15]	张翠歌, 胡良, 卢祖新, 周佳慧. 基于海藻酸自组装胶体粒子的制备及其乳化性能[J]. 材料研究学报, 2021, 35(10): 761-768.

Viewed

Full text

Abstract

Cited

Shared

Discussed