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Three-dimensional nanofiber composite membrane and preparation method thereof

A fiber composite and three-dimensional nanotechnology, applied in the field of textile materials, can solve the problems of uniformity and adhesion of fiber membranes, poor mechanical properties of nanofiber membranes, and difficulty in industrialization, and achieve easy industrial production, tight adhesion, and dispersion Good results

Inactive Publication Date: 2012-07-25
昆山汇维新材料有限公司
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, since the method of preparing nanofiber membranes by electrospinning is mainly suitable for polymers that can be solution-spun, this method has great limitations in the selection of materials when preparing nanofibers. In addition, the nanofiber membrane prepared by electrospinning has poor mechanical properties and is not easy to use alone. However, since the nanofiber membrane prepared by electrospinning is composed of continuous long fibers, and its thickness is difficult to control, if it is attached to If it is used on the substrate fabric, there will be great defects in the uniformity of the fiber film and the adhesion to the substrate fabric, which will affect the use effect. This has led to the limitation of the application field of the nanofibrous membrane prepared by this method
At present, there have been many reports on the preparation of nanofiber membranes by electrospinning technology. Not yet reported

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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preparation example Construction

[0015] A preparation method of a three-dimensional nanofiber composite film, the preparation method is carried out according to the following steps:

[0016] A The thermoplastic polymer nanofiber and the solvent are emulsified at room temperature at a speed of 10,000 rpm for 6-10 minutes to obtain a uniform and stably dispersed nanofiber emulsion at a ratio of 0.5-2:98-99.5 in mass ratio; wherein , thermoplastic polymer nanofibers are polyethylene terephthalate PET nanofibers or polycaprolactam PA6 nanofibers or polypropylene PP nanofibers or polylactic acid PLA or a copolymer of polyethylene glycol PVA and polyethylene PE PVA- One of the co-PE nanofibers, but according to different thermoplastic polymer nanofibers, the selected solvent is also different, which is a mixture of deionized water and isopropanol or formic acid or acetic acid.

[0017] B, the nanofiber emulsion prepared in step A is surface-coated on the surface of different substrate fabrics by scraping at normal ...

Embodiment 1

[0020] The nanofibers are polycaprolactam nanofibers, the solvent is a mixture of deionized water and formic acid, wherein the mass fraction of nanofibers in the mixture is 0.5%, and the base fabric is non-woven fabric.

[0021] 100 grams of polycaprolactam nanofibers are added in the mixed solution of 19900 grams of deionized water and formic acid, and after emulsification at a speed of 10000 rpm through an emulsifier at room temperature, obtain a uniform and stably dispersed polycaprolactam nanofiber emulsion, wherein The mass ratio of deionized water to formic acid in the mixed solution is 40:60, and the emulsified polycaprolactam nanofiber emulsion is surface-coated on the non-woven fabric, and the coating thickness is 1mm. After drying, three-dimensional polycaprolactam nanofibers can be obtained. Fiber / non-woven composite membrane material.

Embodiment 2

[0023] The nanofibers are polyethylene terephthalate nanofibers, the solvent is a mixture of deionized water and acetic acid, wherein the mass fraction of the nanofibers in the mixture is 1.5%, and the base fabric is a woven fabric.

[0024] Add 150 grams of polyethylene terephthalate nanofibers into a mixture of 9850 grams of deionized water and acetic acid, and emulsify at room temperature at a speed of 10,000 rpm for 9 minutes to obtain a uniform and stable dispersion of Polyethylene terephthalate nanofiber emulsion, wherein the mass ratio of deionized water and acetic acid in the mixed solution is 30:70, and the emulsified polyethylene terephthalate nanofiber emulsion is applied on the machine-made fabric Surface coating is carried out, and the coating thickness is 2mm. After drying, a three-dimensional polyethylene terephthalate nanofiber / woven fabric composite film material can be obtained.

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Abstract

The invention relates to a three-dimensional nanofiber membrane and a preparation method thereof, belonging to the field of textile materials. The three-dimensional nanofiber composite membrane comprises base material fabric and a surface membrane layer, wherein the surface membrane layer is a thermoplastic polymer nanofiber membrane formed by carrying out surface scrape coating on the base material fabric; and machine-made fabric, knitted fabric or non-woven fabric is adopted as the base material fabric. The three-dimensional nanofiber membrane has the advantages of even thickness, good dispersibility and mechanical property and large specific surface area, and can be widely applied to multiple fields of cleaning materials, biomedicines, sensors, radiation protection and the like. In addition, the preparation method provided by the invention is simple in technology, and industrial production is easy to realize.

Description

technical field [0001] The invention relates to a three-dimensional nanofiber composite film and a preparation method thereof, belonging to the field of textile materials. Background technique [0002] With the rapid development of nanomaterial technology, nanofiber technology has become the frontier and research hotspot of fiber science, and has been applied in electronics, mechanical biomedicine, chemical industry, textile and other industrial fields. The application of nanofiber technology in traditional industries It will certainly enhance traditional industries. Due to its special physical shape and structure, the nanofibrous membrane exhibits special properties in the following aspects: surface effect, small size effect, quantum size effect, and macroscopic quantum positive tunnel effect. This makes nanofibers widely used in clothing, food, medicine, energy, electronics, papermaking, aviation and other fields. In addition, nanofiber membranes can also be used for pur...

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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IPC IPC(8): B32B27/02B32B27/12
Inventor 王栋孙刚黄祖基王凯
Owner 昆山汇维新材料有限公司
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