导电织物增强PVDF复合膜的制备与性能研究

李娜娜; 付元静; 常哲; 刘峰

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导电织物增强PVDF复合膜的制备与性能研究

首发时间：2016-11-02

李娜娜 ¹
李娜娜(1982-)，副教授，主要研究方向为高分子功能膜的研究与应用
付元静 ¹ 常哲 ¹ 刘峰 ¹

1、天津工业大学先进纺织复合材料教育部重点实验室，天津300387

摘要：为进一步提高PVDF平板膜的机械强度，赋予膜导电性能，采用浸没沉淀相转化法，分别选用由镀银涤纶纱线、涤纶不锈钢包芯纱和不锈钢纤维制成的导电织物为支撑体，制备了增强型导电PVDF平板复合膜。采用扫描电子显微镜观察和对复合膜的水通量、孔隙率、截留率、泡点孔径、极限应力、表面比电阻等测试，研究了不同导电纤维织物对复合膜形态和结构、渗透性能、力学性能及导电性能的影响。实验结果表明：涤纶不锈钢包芯纱与PVDF膜粘附较好，而镀银涤纶纱线和不锈钢纤维所制备织物与聚合物膜之间有明显的界面分离现象；涤纶不锈钢纱包芯纱织物复合膜孔隙率、水通量及泡点孔径较其他2种织物复合膜更大，而截留率较低；不锈钢纤维织物复合膜厚度最薄，但不锈钢纤维织物复合膜孔隙率、泡点孔径及水通量较小，而截留率较大；复合膜极限应力的大小顺序为涤纶镀银织物复合膜＞涤纶不锈钢包芯织物复合膜＞不锈钢织物复合膜，且复合膜的极限应力均高于纯PVDF膜；镀银涤纶纱线织物复合膜的导电性最好。总之，通过将PVDF与针织物进行复合制膜，不仅可提高膜的强度，还可赋予膜导电特性，其中，涤纶不锈钢包芯纱与PVDF膜较其他两种膜结构最稳定，膜的渗透性能最好，因此选用涤纶包芯纱为复合膜支撑体最佳。

关键词：复合膜 PVDF 导电增强

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Preparation and properties of conductive fabric reinforced PVDF composite membrane

LI Nana ¹
李娜娜(1982-)，副教授，主要研究方向为高分子功能膜的研究与应用
FU Yuanjing ¹ CHANG Zhe ¹ LIU Feng ¹

1、The Key Laboratory of Hollow Fiber Membrane Material and Process of Ministry of Education, Tianjin Polytechnic University, Tianjin 300160, China

Abstract：To further enhance the mechanical strength of PVDF membrane and impart it with electric conduction, high strength and conductive PVDF flat composite membranes were prepared via immersion precipitation phase principle using the knitted silver yarn, polyester core-spun yarn of stainless steel, and stainless steel fiber as fabrics support body. The effects of conductive fiber type on morphology and structure, permeability, mechanical properties and conductive performance of the composite membranes were explored by SEM, water flux, porosity, rejection rate, bubble point pore, tensile strength, and surface specific resistance. The results show that good adhesion between polyester core-spun yarn of stainless steel and PVDF composite membrane can be formed, while obvious interface separation with silver yarn or stainless steel fiber as fabrics can be identified. The water flux, porosity, bubble point pore of composite membrane supported by polyester core-spun yarn of stainless steel are larger than those of the other two composite membranes, but its rejection rate is lower. The thickness of the composite membrane supported by stainless steel fiber is the smallest, while its water flux, porosity, bubble point pore are lower, and its rejection rate is larger. Moreover, the limit stress of each composite membrane follows the sequence of silver yarn>polyester core-spun yarn of stainless steel>stainless steel fiber, which are all larger than the pure PVDF membrane. Among these three composite membranes, the one supported by silver yarn has the best electric conduction. In brief, the fabrics support body could not only enhance the mechanical strength of the PVDF membrane, but also make it conductive. Compared with the other two composite membranes, the one supported by polyester core-spun yarn of stainless steel shows the most stable structure and best permeability, which could be the optimal choice.

Keywords： composite membrane PVDF electric conduction enhancement

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李娜娜，付元静，常哲，等. 导电织物增强PVDF复合膜的制备与性能研究[EB/OL]. 北京：中国科技论文在线 [2016-11-02]. http://www.paper.edu.cn/releasepaper/content/201611-27.

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论文编号	201611-27
论文题目	导电织物增强PVDF复合膜的制备与性能研究
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