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Electrostatic spraying nano-cobweb waterproof moisture-permeable film and preparation method thereof

A waterproof and moisture-permeable membrane, electrostatic spraying technology, applied in protective clothing, clothing, textiles and papermaking, etc., can solve the problems of low porosity, small coverage area, inability to meet waterproof and moisture-permeable, and achieve good structural integrity, increase The effect of coverage area

Active Publication Date: 2015-04-29
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These patents all use polymer solution for electrospinning. Although a spider web structure with small diameter and small pore size is prepared, the web structure prepared is a composite material with fibers as scaffolds and nano-spider webs between them, and its porosity is low. , The coverage area is small, it is difficult to obtain a material that is completely a spider web structure, and it cannot meet the needs of waterproof and moisture-permeable practical applications

Method used

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  • Electrostatic spraying nano-cobweb waterproof moisture-permeable film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for preparing an electrostatically sprayed nano-spider web waterproof and moisture-permeable membrane, the specific steps are:

[0028] (1) Dissolve calcium chloride in deionized water, and ultrasonic for 1 hour, then dissolve the polyurethane emulsion in deionized water containing calcium chloride, and stir continuously for 5 hours with a magnetic stirring device to prepare a uniform and stable Emulsion; in the uniform emulsion, the mass concentration of the polyurethane emulsion is 40%, and the content of calcium chloride is 0.01% of the total mass of the emulsion; the conductivity of the emulsion is 0.05mS / cm, and the surface tension is 10mN / cm;

[0029] (2) Spray using the electrostatic spray box 1 shown in the accompanying drawings, first pour the emulsion into the spray pipe through the electrostatic spray liquid supply system and the spray needle 3, the receiving substrate 4 is fabric, and the receiving distance is 10cm;

[0030] (3) Turn on the high-vol...

Embodiment 2

[0032] A method for preparing an electrostatically sprayed nano-spider web waterproof and moisture-permeable membrane, the specific steps are:

[0033] (1) Add sodium chloride to deionized water, and ultrasonic for 3 hours, then dissolve the polyacrylate emulsion in deionized water containing sodium chloride, place the above emulsion on a magnetic stirrer and stir continuously for 8 hours , be mixed with uniform, stable emulsion; In described homogeneous emulsion, the mass concentration of polyacrylate emulsion is 35%, and the content of sodium chloride is 15% of total mass of emulsion, and the conductivity of described emulsion is 4mS / cm , the surface tension is 50mN / cm.

[0034] (2) Use the electrostatic spray box 1 shown in the accompanying drawing to spray, first pour the emulsion into the spray pipe through the electrostatic spray liquid supply system and spray needle 3, the receiving substrate is metal mesh, and the receiving distance is 15cm;

[0035] (3) Turn on the h...

Embodiment 3

[0037] A method for preparing an electrostatically sprayed nano-spider web waterproof and moisture-permeable membrane, the specific steps are:

[0038] (1) Lithium chloride is added to deionized water, and ultrasonic for 6 hours, then the polystyrene emulsion is dissolved in deionized water containing lithium chloride, and the above emulsion is placed on a magnetic stirrer and continuously stirred for 6 hours , be mixed with uniform, stable emulsion; In described homogeneous emulsion, the mass concentration of polystyrene emulsion is 30%, and the content of lithium chloride is 1% of emulsion gross mass, and the conductivity of described emulsion is 4.1mS / cm, the surface tension is 26mN / cm.

[0039] (2) Use the electrostatic spray box 1 shown in the accompanying drawing to spray, first pour the emulsion into the spray pipe through the electrostatic spray liquid supply system and the spray needle 3, the receiving substrate is cellulose paper, and the receiving distance is 50cm;...

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Abstract

The invention relates to an electrostatic spraying nano-cobweb waterproof moisture-permeable film and a preparation method thereof, in particular to a processing technology for preparing a nano-cobweb waterproof moisture-permeable film with electrostatic spraying emulsion by counterblast blowing assisted wet formation. The method specifically includes: in the process of electrostatic spraying, blowing liquid droplets with counterblast in the direction parallel to the spraying direction of polymer emulsion droplets, enabling the droplets to be stressed and deformed during drying in an electric field so as to form a liquid film, and further performing phase separation to form a two-dimensional web material of a stabilized hexagonal mesh structure. The nano-cobweb waterproof moisture-permeable film has the advantages that the cobweb coverage area is 100%, structural integrity is good, average pore size is 10-200nm, and the porosity is more than or equal to 80%; the waterproof moisture-permeable film is resistant to water pressure which is more than or equal to 120kPa, moisture permeable flux is more than or equal to 15000g / m2 / d, and the waterproof moisture-permeable film has broad application prospect in the field of outdoor sportswear, field operation military uniform and the like.

Description

technical field [0001] The invention belongs to the technical field of electrostatic spraying, and relates to an electrostatically sprayed nano-spider web waterproof and moisture-permeable film and a preparation method thereof, in particular to a method for preparing a nano-spider web waterproof and moisture-permeable film by using an electrostatic spray emulsion that is blown by reverse airflow to assist in forming a web Processing Technology. Background technique [0002] People will inevitably encounter severe weather such as heavy rain and severe cold in the outdoor environment. Traditional clothing is easily soaked by rain and snow and has defects that sweat is difficult to discharge in time, which will cause discomfort such as stickiness, cold and even frostbite. Clothing with waterproof and moisture-permeable (perspiration wicking) functions has become one of the important ways to resist inclement weather. As the core material of waterproof and moisture-permeable fun...

Claims

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Application Information

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IPC IPC(8): D04H1/728D04H1/732D04H1/4382D04H1/4374D01D5/00A41D31/02
CPCA41D31/02A41D2600/00A41D2600/10D01D5/00D04H1/4374D04H1/4382D04H1/728D04H1/732
Inventor 丁彬生俊露李洋张世超赵景张龙威田海洋孙刚俞建勇
Owner DONGHUA UNIV
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