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High-waterproof moisture-permeable film and preparation method thereof

A waterproof and moisture-permeable membrane, hydrophilic modification technology, applied in the manufacture of rayon, single-component polyester rayon, fiber processing and other directions, can solve the problems of difficult to handle, difficult to biodegrade the waterproof and breathable membrane, to increase the Hydrophilic, good performance, wide application effect

Pending Publication Date: 2020-10-16
FUJIAN HENGAN HLDG CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, in view of the above content, the present invention provides a high waterproof and moisture-permeable membrane and its preparation method, which solves the problems that the existing waterproof and breathable membrane is difficult to biodegrade and is not easy to handle after being discarded.

Method used

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Examples

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Embodiment 1

[0032] A highly waterproof and moisture-permeable membrane, consisting of the following raw materials in parts by weight: 10 parts of hydrophilic modified polylactic acid, 5 parts of modified carbon nanotubes, 6 parts of polydimethylsiloxane, 0.8 parts of polyvinyl alcohol, organic 90 parts of solvent, the organic solvent is a mixed solvent composed of tetrahydrofuran, ethanol, and petroleum ether, and the mass ratio is 3:2:5.

[0033] The hydrophilic modified polylactic acid is made of polylactic acid and 4-amino-1-butanol, and the specific preparation steps are: dissolving polylactic acid in an ethanol solution, the mass fraction of polylactic acid in the solution is 10%, and then 4-amino-1-butanol was added dropwise, reacted at 60°C for 4h, cooled and placed at -20°C for 12h, suction filtered and freeze-dried to obtain hydrophilic modified polylactic acid. The weight-average molecular weight of the polylactic acid is 1×10 4 , the mass ratio of polylactic acid to 4-amino-1-...

Embodiment 2

[0043] A highly waterproof and moisture-permeable membrane, which is composed of the following raw materials in parts by weight: 15 parts of hydrophilic modified polylactic acid, 6 parts of modified carbon nanotubes, 9 parts of polydimethylsiloxane, 1.2 parts of polyvinyl alcohol, organic 120 parts of solvent, the organic solvent is a mixed solvent composed of tetrahydrofuran, ethanol, and petroleum ether, and the mass ratio is 3:2:5.

[0044] The hydrophilic modified polylactic acid is made of polylactic acid and 4-amino-1-butanol, and the specific preparation steps are: dissolving polylactic acid in an ethanol solution, the mass fraction of polylactic acid in the solution is 10%, and then 4-amino-1-butanol was added dropwise, reacted at 60°C for 6h, cooled and placed at -20°C for 12h, suction filtered and freeze-dried to obtain hydrophilic modified polylactic acid. The weight average molecular weight of described polylactic acid is 5 * 10 4 , the mass ratio of polylactic ac...

Embodiment 3

[0054] A highly waterproof and moisture-permeable membrane, consisting of the following raw materials in parts by weight: 20 parts of hydrophilic modified polylactic acid, 8 parts of modified carbon nanotubes, 12 parts of polydimethylsiloxane, 1.5 parts of polyvinyl alcohol, organic 150 parts of solvent, the organic solvent is a mixed solvent composed of tetrahydrofuran, ethanol, and petroleum ether, and the mass ratio is 3:2:5.

[0055] The hydrophilic modified polylactic acid is made of polylactic acid and 4-amino-1-butanol, and the specific preparation steps are: dissolving polylactic acid in an ethanol solution, the mass fraction of polylactic acid in the solution is 10%, and then 4-amino-1-butanol was added dropwise, reacted at 60°C for 8h, cooled and placed at -20°C for 12h, suction filtered and freeze-dried to obtain hydrophilic modified polylactic acid. The weight-average molecular weight of the polylactic acid is 1×10 5 , the mass ratio of polylactic acid to 4-amino-...

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Abstract

The invention relates to the technical field of high polymer materials, and provides a high-waterproof moisture-permeable film and a preparation method thereof. The high-waterproof moisture-permeablefilm is prepared from, by weight, 10-20 parts of hydrophilic modified polylactic acid, 5-8 parts of modified carbon nanotubes, 6-12 parts of polydimethylsiloxane, 0.8-1.5 parts of polyvinyl alcohol and 90-150 parts of an organic solvent. The biodegradable polymer polylactic acid is selected as the raw material, so that the problems that in the prior art, a waterproof breathable film is difficult to biodegrade and difficult to treat after being discarded are solved, and meanwhile, electrostatic spinning and other technical means are combined, so that the prepared film material has excellent waterproof and moisture permeable performance, and the mechanical property is also improved.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a highly waterproof and moisture-permeable membrane and a preparation method thereof. Background technique [0002] Medical protective clothing refers to the protective clothing used by medical personnel and people entering specific medical and health areas. It can effectively resist the penetration of blood, harmful ultrafine dust, and germs, and provide people with good protection. At present, the fabrics of medical protective clothing generally include three types: high-density fabrics, coated fabrics and laminated composite fabrics. Among them, high-density fabrics have poor water penetration resistance but excellent moisture permeability, coated fabrics have excellent water penetration resistance but poor moisture permeability, and only laminated composite fabrics can simultaneously exhibit excellent water penetration resistance and moisture permeability. Laminate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/643D04H1/728D04H1/435D06C7/00D01F6/92D01F1/10C08G63/91D06M101/32
CPCD06M15/643D04H1/728D04H1/435D06C7/00D01F6/92D01F1/10C08G63/912D06M2101/32
Inventor 汤国开黄阿玲
Owner FUJIAN HENGAN HLDG CO LTD
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