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A conductive knitted fabric reinforced composite film

A knitted fabric and enhanced technology, which is applied in the field of composite membranes and polymer separation membranes, can solve the problems of high preparation costs, and achieve the effects of low cost, good impact fatigue resistance, and high production efficiency

Active Publication Date: 2015-12-02
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the research on conductive films is generally limited to the field of inorganic films, and its preparation cost is relatively high. A few also have research on organic conductive films, such as patent CN102974227A, but there are few related studies on conductive films that combine traditional textiles with polymer films. to report

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • A conductive knitted fabric reinforced composite film
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A conductive knitted fabric reinforced composite membrane, comprising a polymer film and a conductive knitted fabric, the conductive knitted fabric is a support layer 2, embedded inside the polymer film layer, and the polymer film is divided into a polymer separation layer epithelial layer 1 and a The polymer separates the layers from the lower cortex 3, forming a sandwich structure.

[0024] The horizontal density of the conductive knitted fabric is 31.9 wales / 5cm, the longitudinal density is 90.5 wales / 5cm, the thickness is 0.38mm, and the surface specific resistance is 9.37Ω;

[0025] The casting solution of the polymer film is a uniform casting solution with a polymer concentration of 15% composed of 15gPVDF, 6gPEG-2000, and 79gDMF mixed solution;

[0026] The conductive knitted fabric reinforced composite membrane has a thickness of 0.549 mm and a water flux of 203.77 L / m at 0.1 MPa 2 h, the longitudinal tensile strength is 45.74N, and the surface specific resista...

Embodiment 2

[0031] A conductive knitted fabric reinforced composite membrane, comprising a polymer film and a conductive knitted fabric, the conductive knitted fabric is a support layer 2, embedded inside the polymer film layer, and the polymer film is divided into a polymer separation layer epithelial layer 1 and a The polymer separates the layers from the lower cortex 3, forming a sandwich structure.

[0032] The horizontal density of the conductive knitted fabric is 33.5 wales / 5cm, the longitudinal density is 49.8 wales / 5cm, the thickness is 1.02mm, and the surface specific resistance is 4.63Ω;

[0033] The casting solution of the polymer film is a uniform casting solution with a polymer concentration of 22% composed of 22gPVDF, 6gPEG-2000, and 72gDMF mixed solution;

[0034]The conductive knitted fabric reinforced composite membrane has a thickness of 0.795 mm and a water flux of 190.78 L / m at 0.1 MPa 2 h, the longitudinal tensile strength is 97.4N, and the surface specific resistanc...

Embodiment 3

[0037] A conductive knitted fabric reinforced composite membrane, comprising a polymer film and a conductive knitted fabric, the conductive knitted fabric is a support layer 2, embedded inside the polymer film layer, and the polymer film is divided into a polymer separation layer epithelial layer 1 and a The polymer separates the layers from the lower cortex 3, forming a sandwich structure.

[0038] The horizontal density of the conductive knitted fabric is 26.2 wales / 5cm, the longitudinal density is 55.1 wales / 5cm, the thickness is 0.42mm, and the surface specific resistance is 11.06Ω;

[0039] The casting solution of the polymer film is a uniform casting solution with a polymer concentration of 20% composed of 20gPVDF, 6gPEG-2000, and 74gDMF mixed solution;

[0040] The conductive knitted fabric reinforced composite membrane has a thickness of 0.592 mm and a water flux of 141.55 L / m at 0.1 MPa 2 h, the longitudinal tensile strength is 48.971N, and the surface specific resis...

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Abstract

The invention relates to a polymer separation membrane and specifically discloses a conductive knitted fabric reinforced composite membrane. The composite membrane comprises a polymer membrane and a conductive knitted fabric, wherein the conductive knitted fabric is used as a supporting layer and embedded into the layer of the polymer membrane so as to divide the polymer membrane into a polymer separating layer upper cortex and a polymer separating layer lower cortex, thereby forming a sandwich structure. According to the invention, the conductive knitted fabric is embedded into a polymer for the first time, so the polymer membrane is endowed with good conductive performance, pollutants are effectively prevented from entering into the membrane, a membrane pollution speed is slowed down, the service life of the membrane is prolonged, and the mechanical strength of the membrane is improved. Moreover, conductive yarns are widely available, a computerized flat knitting machine is used to fabricate a knitted fabric reinforced support body, process flow is simple, the advantages of convenience in changing structures, high production efficiency and low cost are obtained, and the knitted fabric reinforced support body has better impact fatigue resistance compared with a woven fabric.

Description

technical field [0001] The invention belongs to the field of sewage treatment and relates to a polymer separation membrane, in particular to a composite membrane with high strength and superior conductivity. Background technique [0002] With the rapid economic development and population expansion, the shortage of water resources has become a serious challenge faced by mankind. Sewage recycling is one of the important means to solve the shortage of water resources. It can not only eliminate the pollution of sewage to the environment, but also alleviate the contradiction between water demand and water supply, provide new water sources for industrial and agricultural development, and achieve significant environmental and economic benefits. and social benefits, so membrane technology is playing an increasingly important role as an emerging separation technology and an important means of operation. [0003] Membrane material preparation is a key link in the membrane technology ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/12B01D67/00B01D71/34
Inventor 李娜娜蔡璐宋广礼师艳丽陈斌
Owner TIANJIN POLYTECHNIC UNIV