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A kind of preparation method of conductive knitted fabric reinforced composite film

A knitted fabric and reinforced technology, which is applied in the field of composite film preparation, can solve the problem of high preparation cost, and achieve the effects of low cost, simple process flow and convenient organization process.

Active Publication Date: 2015-12-09
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 high. A few also have researches on organic conductive films, such as patent CN102974227A, but there are few reports on the combination of traditional textile and polymer films to prepare conductive films.

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 kind of preparation method of conductive knitted fabric reinforced composite film
  • A kind of preparation method of conductive knitted fabric reinforced composite film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Weave a 75D / 36f ordinary polyester yarn and a 70D silver-plated yarn into a weft flat needle support body on a computerized flat knitting machine. It is 90.5 rows / 5cm, the thickness is 0.38mm, and the surface specific resistance is 9.37Ω.

[0022] (2) Mix 15g PVDF, 6g PEG-2000, and 79g DMF with a stirring speed of 250r / min, and fully dissolve PVDF and PEG-2000 at 90°C for 3 hours to obtain a uniform casting solution with a polymer concentration of 15%, and place it at 70 ℃ in a water bath until the air bubbles are completely removed.

[0023] (3) Cast the polymer casting solution obtained in step (2) on the top of a clean glass plate, scrape a certain thickness of the polymer plate primary film on the glass plate at a constant speed with a scraper, and knit the weft flat needle woven in step 1 The support body was embedded in it, quickly immersed in a coagulation bath of distilled water at 20° C., and soaked for 48 hours to obtain a conductive knitted fabric reinfo...

Embodiment 2

[0028] (1) Weave a 75D / 36f ordinary polyester yarn and a 70D silver-plated yarn into a double rib support on a computerized flat knitting machine. The process parameters are: the transverse density is 33.5 longitudinal rows / 5cm, and the longitudinal density is 49.8 rows / 5cm, thickness 1.02mm, surface specific resistance 4.63Ω.

[0029] (2) Mix 22g PVDF, 6g PEG-2000, and 72g DMF with a stirring speed of 250r / min, and fully dissolve PVDF and PEG-2000 at 90°C for 3 hours to obtain a uniform casting solution with a polymer concentration of 22%, and place it at 70 ℃ in a water bath until the air bubbles are completely removed.

[0030](3) Cast the polymer film casting solution obtained in step (2) on the top of a clean glass plate, scrape a certain thickness of the polymer plate primary film on the glass plate at a uniform speed with a scraper, and use the double-layered film woven in step (1) The ribbed support was embedded in it, quickly immersed in a coagulation bath of distill...

Embodiment 3

[0033] (1) Weave a 75D / 36f ordinary polyester yarn and a 70D silver-plated yarn into a single-sided tuck support on a computerized flat knitting machine. The density is 55.1 rows / 5cm, the thickness is 0.42mm, and the surface specific resistance is 11.06Ω.

[0034] (2) Mix 20g PVDF, 6g PEG-2000, and 74g DMF with a stirring speed of 250r / min, and fully dissolve PVDF and PEG-2000 at 90°C for 3 hours to obtain a uniform casting solution with a polymer concentration of 20%, and place it at 70 ℃ in a water bath until the air bubbles are completely removed.

[0035] (3) cast the cast film solution obtained in step (2) on the top of a clean glass plate, scrape a certain thickness of the polymer plate primary film on the glass plate at a uniform speed with a scraper, and weave the single-sided set film in step (1) The ring support was embedded in it, and quickly immersed in a 20°C distilled water coagulation bath for 48 hours to obtain a conductive knitted fabric reinforced composite ...

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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Abstract

The invention discloses a preparation method for a conductive knitted fabric reinforced composite membrane. The method comprises the following steps: knitting conductive knitted fabric support bodies of different yarn varieties, coil density and structures by using a computerized flat knitting machine; preparing a membrane casting solution from PVDF, a solvent and an additive according to a certain proportion and carrying out membrane preparation; and embedding the support bodies into a flat primary membrane and carrying out curing by using a soaking-precipitation transformation method so as to obtain the conductive knitted fabric reinforced composite membrane. The invention has the following advantages: the composite separation membrane with high strength and superior conductivity is prepared, conductivity of the separation membrane is greatly improved, sufficient electric field intensity can be obtained through application of small voltage, so energy consumption is reduced, anti-fouling performance of the composite membrane is effectively improved, and the method has wide application prospects and good commercial values.

Description

technical field [0001] The invention belongs to the field of sewage treatment, relates to a polymer separation membrane preparation technology, in particular to a preparation method of 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 preparati...

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