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Thin film composed of polylactic acid fibers in nano-continuous porous structure and preparation method thereof

A polylactic acid fiber, porous structure technology, applied in the direction of fiber type, fiber processing, chemical instruments and methods, etc., can solve the problems of limitation and single pore size, and achieve the effect of good mechanical properties and good ductility.

Pending Publication Date: 2017-07-14
杭州安诺过滤器材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method has high requirements on the porous template and the solvent used for selective etching, and the resulting pore size is single and limited by the size of the template.

Method used

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  • Thin film composed of polylactic acid fibers in nano-continuous porous structure and preparation method thereof
  • Thin film composed of polylactic acid fibers in nano-continuous porous structure and preparation method thereof
  • Thin film composed of polylactic acid fibers in nano-continuous porous structure and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Dissolve 0.5 gram of polylactic acid and 1.5 gram of polyethylene oxide in chloroform and stir for 6 hours to form a 10% chloroform solution with a mass fraction of 1 / 3 of the mass ratio of polylactic acid / polyethylene oxide; Under the same electrospinning conditions, the spinning environment temperature is 10-35°C, and a polylactic acid / polyethylene oxide film with an average diameter of about 6 microns and a fiber-integrated thickness of 200 microns is prepared.

Embodiment 2

[0040] 0.67 grams of polylactic acid and 1.33 grams of polyethylene oxide were dissolved in chloroform and stirred for 6 hours to form a 10% chloroform solution with a mass fraction of 1 / 2 of the mass ratio of polylactic acid / polyethylene oxide; Under the same electrospinning conditions, the spinning environment temperature is 10-35°C, and a polylactic acid / polyethylene oxide film with an average diameter of about 6 microns and a fiber-integrated thickness of 200 microns is prepared.

Embodiment 3

[0042] Dissolve 1 gram of polylactic acid and 1 gram of polyethylene oxide in chloroform and stir for 6 hours to form a 10% chloroform solution with a mass fraction of 1 / 1 in the mass ratio of polylactic acid / polyethylene oxide; Under the same electrospinning conditions, the spinning environment temperature is 10-35°C, and a polylactic acid / polyethylene oxide film with an average diameter of about 6 microns and a fiber-integrated thickness of 200 microns is prepared.

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Abstract

The invention discloses a thin film composed of polylactic acid fibers in a nano-continuous porous structure and a preparation method thereof. The polylactic acid porous fiber thin film is prepared through two template methods including electrostatic spinning and crystallization-induced phase separation. The preparation method particularly includes the steps of: 1) according to certain weight ratio, dissolving polylactic acid and polyethylene oxide in a co-solvent and stirring the solution for 6 h at normal temperature to prepare a homogenous solution; 2) spinning the polymer solution into polylactic acid / polyethylene oxide composite fibers through a high voltage electrostatic technology; 3) soaking the composite fibers in a water solution, performing etching to remove the polyethylene oxide phase in the composite fibers, and dehydrating the composite fibers in a drying box to obtain an environment-friendly polylactic acid porous fiber cloth. The polylactic acid porous fiber cloth has high specific surface area due to micro and nano hierarchical pore structures therein. The fiber cloth has high fluid flux and excellent mechanical performance, and can be applied to the membrane separation fields, such as water treatment, air treatment, etc.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a hierarchical porous film composed of polylactic acid fibers with a nano-continuous porous structure and a preparation method for obtaining the product by combining electrospinning and crystallization-induced phase separation. Background technique [0002] In view of the widespread application of polymeric porous materials in water-oil separation, lithium-ion battery separators, and drug release, their preparation methods have attracted extensive attention. The preparation methods of polymer porous membranes include template method and assembly method. For example, in a typical template method, a template with a continuous pore structure is usually added with a target material by a special method, and then the template is removed by selective etching to obtain a porous structure. This method has high requirements on the porous template and the solvent used for selecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/05D06M11/30D04H3/009D04H3/011D04H3/03D01D5/00B01D67/00B01D71/48A61L31/06A61L31/14D06M101/32D06M101/30
CPCA61L31/06A61L31/146B01D67/0002B01D71/48D01D5/0023D04H3/009D04H3/011D04H3/03D06M11/05D06M11/30D06M2101/30D06M2101/32C08L67/04
Inventor 何美鋒林卫健
Owner 杭州安诺过滤器材有限公司
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