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Preparation of moisture controllable polymer composite film and its application

A technology of composite film and polymer is applied in the field of preparation of moisture permeable and controllable polymer composite film to achieve the effects of reasonable function, simple production and excellent performance.

Inactive Publication Date: 2007-10-03
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there have been no reports and patents on the preparation of waterproof and moisture-permeable films and fabrics by introducing poly(N-propylacrylamide) hydrogel into the hydrophilic shape memory polyurethane system at home and abroad.

Method used

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  • Preparation of moisture controllable polymer composite film and its application

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0037]In the polymer composite film prepared by the physical mixing method of the present invention, the trigger temperatures of the prepared hydrophilic shape memory polyurethane and poly(N-isopropylacrylamide) hydrogel systems are both set at 32°C. The prepared poly(N-isopropylacrylamide) hydrogel is in the state of moisture absorption and swelling, and is pulverized into tiny particles through a ball mill, and its average particle size distribution is between 450 and 550 nm, and is added to the 5wt.% water-based polyurethane dilution solution, stirred with a magnetic stirrer for 8 minutes to make it fully mixed, then poured into the template, evaporated water slowly at a low temperature at 20°C, and stood still to form a film. The thickness of the film is 35μm, and the square meter weight is 20g / m 2 , and its moisture permeability effect is shown in the table below.

[0038] polymer composite film

(film thickness) / (square meter weight)

(0.035mm) / (20g / ...

example 2

[0042] polymer composite film

example 3

[0044] polymer composite film

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Abstract

This invention relates to a preparation method of wet-penetrating polymer laminate film. The steps includes: (1) physical mixing: dry poly- ( N - isopropyl acrylamide) systematic hydrogel, add to aquosity form memory polyurethane system, magnetic stirring (3) copolymerization: TDI (MDI), polyester (ether) soft piece, dihydroxy methylmalonic acid DMPA and catalyzer takes polycondensation reaction to generate prepolymer with NCO end. Add N - isopropyl acrylamide water solution, initiator, cross-linking agent and accelerator, carry out copolymerization reaction; (3) graft: put film at middle of radio frequency coupler electrode, and put the polyurethane film hand led by plasms body in air for 1 to 2 hours, immerge film in 5 to 10 wt percent monomer water solution. Inlet nitrogen, UV-irradiation for 15 to 30 min at low temperature, closeness place, obtain polyurethane film of graft ( N - isopropyl acrylamide) hydrogel.

Description

technical field [0001] The invention belongs to the field of preparation and application of intelligent polymers and functional composite materials, and in particular relates to the preparation and application of a controllable moisture permeability polymer composite film. Background technique [0002] The emergence of shape-memory polyurethane has opened up a new research space for the development of waterproof and moisture-permeable films or fabrics, and has raised the waterproof and moisture-permeable performance to a new level, that is, the intelligent stage. The principle is that the shape memory polyurethane material is at the glass transition temperature T g In the region, due to the intensification of the micro-Brownian motion of the molecular chain, the inter-molecular gap increases significantly, that is, the free volume of the membrane increases, resulting in a qualitative mutation in the moisture permeability, and its moisture permeability changes with the change...

Claims

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Application Information

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IPC IPC(8): C08J7/18C08J5/18C08F281/00
Inventor 黄鹤张丹毛志平严灏景于伟东
Owner DONGHUA UNIV
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