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High-breathability super-hydrophobic polyvinyl alcohol nanofiber non-woven fabric, and preparation method and applications thereof

A nanofiber, polyvinyl alcohol technology, applied in the direction of fiber type, fiber processing, separation method, etc., can solve the problems of inability to store and transport, difficult to find application fields, and inability to use, achieve moderate strength, heat shrinkage resistance, production Environmentally friendly process, high porosity effect

Active Publication Date: 2015-03-25
JIANGXI XIAN CAI NANOFIBERS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this polyvinyl alcohol nanofiber is easily soluble in water and easily damaged by humid air, so it cannot be used in a humid environment, nor can it be stored and transported in a humid environment.
That is, such PVA nanofiber nonwovens can be produced environmentally friendly, but it is difficult to find application fields

Method used

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  • High-breathability super-hydrophobic polyvinyl alcohol nanofiber non-woven fabric, and preparation method and applications thereof
  • High-breathability super-hydrophobic polyvinyl alcohol nanofiber non-woven fabric, and preparation method and applications thereof
  • High-breathability super-hydrophobic polyvinyl alcohol nanofiber non-woven fabric, and preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: Preparation of PVA nanofiber nonwoven fabric modified by methyltrichlorosilane

[0018] (1) PVA electrospinning: Shanghai Ziyi Reagent Factory polyvinyl alcohol (average molecular weight Mw = 88000, intrinsic viscosity 1.20dL / g) 100g mixed with a mixed solvent composed of 700g distilled water and 200g absolute ethanol, and added 0.8g chloride Ammonium (in order to increase the conductivity of the solution), stirred and dissolved at 60° C. for 4 hours to form a transparent homogeneous solution with a mass concentration of 10%; the absolute viscosity of the solution is 1.8 Pa.s. The solution was electrospun in an electric field with an electric field strength of 250kV / m, and a stainless steel mesh belt with a width of 1 meter was used as a collector to collect polyamic acid nanofiber nonwovens, and the belt speed was 2.0m / min.

[0019] (2) Nanofiber surface hydrophobization treatment: dissolving the upper 15g methyltrichlorosilane in 985g cyclohexane to form...

Embodiment 2

[0021] Example 2: Preparation of Octadecyltrichlorosilane-modified PVA nanofiber nonwoven fabric

[0022] (1) PVA electrospinning: Shanghai Ziyi Reagent Factory polyvinyl alcohol (average molecular weight Mw=88000, intrinsic viscosity 1.20dL / g) 140g mixed with a mixed solvent composed of 530g distilled water and 330g absolute ethanol, and added 0.8g chlorinated Ammonium (in order to increase the conductivity of the solution), stirred and dissolved at 60° C. for 5 hours to form a transparent homogeneous solution with a mass concentration of 14%; the absolute viscosity of the solution was 3.0 Pa.s. The solution was electrospun in an electric field with an electric field strength of 200kV / m, and a stainless steel mesh belt with a width of 1 meter was used as a collector to collect polyamic acid nanofiber nonwovens, and the belt speed was 2.0m / min.

[0023] (2) Nanofiber surface hydrophobization treatment: dissolving the upper 15g octadecyl trichlorosilane in 985g sherwood oil to ...

Embodiment 3

[0025] Example 3: Preparation of PVA nanofiber nonwoven fabric modified by phenyltrichlorosilane

[0026] (1) PVA electrospinning: Shanghai Ziyi Reagent Factory polyvinyl alcohol (average molecular weight Mw=88000, intrinsic viscosity 1.20dL / g) 100g mixed with a mixed solvent composed of 550g distilled water and 350g absolute ethanol, and added 0.8g chloride Ammonium (in order to increase the conductivity of the solution), stirred and dissolved at 60° C. for 4 hours to form a transparent homogeneous solution with a mass concentration of 10%; the absolute viscosity of the solution was 2.0 Pa.s. The solution was electrospun in an electric field with an electric field strength of 250kV / m, and a stainless steel mesh belt with a width of 1 meter was used as a collector to collect polyamic acid nanofiber nonwovens, and the belt speed was 2.0m / min.

[0027] (2) Nanofiber surface hydrophobization treatment: dissolving the upper 15g phenyltrichlorosilane in 985g tetrahydrofuran to form...

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Abstract

The invention relates to a high-breathability super-hydrophobic polyvinyl alcohol nanofiber non-woven fabric, and a preparation method and applications thereof. The surface chemical structure of the polyvinyl alcohol nanofiber is shown in the specification, wherein R is aliphatic series alkyl or phenyl or methyl phenyl; n is equal to 1000-1000. The PVA nanofiber nonwoven fabric is environment-friendly in preparation technology, is low in material cost, has porosity, moderate strength and certain thermo-shrinkage resistance characteristic, is suitable for battery diaphragms of lithium ion batteries, filtering materials for air filtration, and the like, and is widely applied to lithium battery industry, and air filtration industry for haze pollution.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a polyvinyl alcohol nanofiber nonwoven fabric. Background technique [0002] Polyvinyl alcohol (PVA) is a water-soluble polymer, which can be electrospun to prepare electrospun nanofiber nonwovens through its aqueous solution, which is an environmentally friendly production method of polymer nanofiber nonwovens. However, this polyvinyl alcohol nanofiber is easily soluble in water and easily damaged by humid air, so it cannot be used in a humid environment, nor can it be stored and transported in a humid environment. That is, such PVA nanofiber nonwovens can be produced environmentally friendly, but it is difficult to find application fields. Contents of the invention [0003] The object of the present invention is to provide a kind of highly air-permeable, moisture-resistant PVA nanofiber nonwoven fabric. [0004] Another object of the present invention is to provide a method...

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): D06M13/517D01F6/50D01F1/10D01D5/00H01M2/16B01D39/08D06M101/24H01M50/409
CPCY02E60/10
Inventor 侯豪情王琦孔岐忠程楚云周小平
Owner JIANGXI XIAN CAI NANOFIBERS TECH
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