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Janus fabric membrane based on polylactic acid and preparation method and application of Janus fabric membrane

A polylactic acid, fabric film technology, applied in textiles and papermaking, one-component synthetic polymer rayon, one-component polyester rayon, etc., to achieve the effect of firm bonding, thermal comfort and good breathability

Active Publication Date: 2020-11-13
BEIJING INST OF CLOTHING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Polylactic acid (PLA) is a polymer synthesized from lactic acid. It is non-toxic, non-irritating and has good biocompatibility. It has a wide range of sources and is environmentally friendly. It is a completely biodegradable aliphatic polyester. The fabric made is comfortable to wear and has good wearability. Janus membrane refers to the membrane material with asymmetric morphology or chemical composition on both sides of the membrane. In a broad sense, asymmetric Janus membrane refers to the membrane material with different properties on both sides, such as moisturizing Humidity, etc., using polylactic acid to prepare a waterproof and breathable Janus fabric membrane has no public reports

Method used

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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  • Janus fabric membrane based on polylactic acid and preparation method and application of Janus fabric membrane
  • Janus fabric membrane based on polylactic acid and preparation method and application of Janus fabric membrane
  • Janus fabric membrane based on polylactic acid and preparation method and application of Janus fabric membrane

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preparation example Construction

[0038] According to the present invention, a kind of preparation method of the Janus fabric film based on polylactic acid is provided, the method may further comprise the steps:

[0039] Step 1, preparing a modified polylactic acid fabric layer.

[0040] According to the present invention, step 1, preparation of modified polylactic acid fabric layer comprises:

[0041] Step 1.1, pretreating the polylactic acid fabric to obtain the pretreated polylactic acid fabric;

[0042] Step 1.2, preparing inorganic particles on the pretreated polylactic acid fabric.

[0043] The inventors found that ultraviolet protection is more important to people's healthy life, non-toxic, tasteless nano-titanium dioxide particles have a good shielding effect on ultraviolet rays, nano-titanium dioxide particles can effectively absorb ultraviolet light to generate hole-electron pairs, and have a good effect on ultraviolet light. It has good scattering effect, will not decompose and change color under ...

Embodiment 1

[0103] Cut the polylactic acid fabric into a size of 10cm×10cm, wash it several times with deionized water and 10g / L sodium hydroxide solution, and dry it to obtain a polylactic acid fabric treated with sodium hydroxide solution, which is called PLA (NaOH) fabric. spare;

[0104] Add water to Tris to form a Tris pH buffer solution with a concentration of 10 mM, add dopamine powder to the Tris pH buffer solution to form a dopamine-Tris buffer solution with a concentration of 0.5 g / L, and adjust its pH value to 8.5 with hydrochloric acid;

[0105] Immerse the PLA (NaOH) fabric in the dopamine-Tris buffer solution and stir for 24 hours, take it out, wash it with absolute ethanol, and dry it at 60°C for 2 hours to obtain a pretreated polylactic acid fabric, which is designated as PLA-PDA fabric;

[0106] Add 1mL deionized water to 500mL absolute ethanol to obtain mixed solution I;

[0107] Add 20 mL of n-butyl titanate dropwise to the mixed solution I, and the mixed solution II i...

Embodiment 2

[0112] Repeat the process of Example 1, the difference is that the spinning time is 4min, and other processes are the same as in Example 1 to obtain the Janus fabric membrane.

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Abstract

The invention discloses a Janus fabric membrane based on polylactic acid and a preparation method and application of the Janus fabric membrane. The Janus fabric membrane comprises a modified polylactic acid fabric layer and a polylactic acid nanofiber membrane layer, wherein the modified polylactic acid fabric layer side is a super hydrophilic side, the polylactic acid nanofiber membrane layer side is a hydrophobic side, the modified polylactic acid fabric layer comprises a polylactic acid fabric layer and nano titanium dioxide, and preferably also comprises polydopamine, and the polylactic acid nanofiber membrane layer is obtained by electrospinning of a polylactic acid electrospinning precursor spinning solution. The Janus fabric membrane has unidirectional water permeability, excellentair permeability and moisture permeability, and excellent UV protection performance, can be used as waterproof and breathable protective clothing, and has good wearing comfort.

Description

technical field [0001] The invention relates to the field of functional materials, in particular to a polylactic acid-based Janus fabric membrane and its preparation method and application. Background technique [0002] With the continuous improvement of people's living standards, textiles need to have specific functions under special conditions while meeting the needs of dressing. In a specific environment, textiles with waterproof and breathable properties have great application value. [0003] Polylactic acid (PLA) is a polymer synthesized from lactic acid. It is non-toxic, non-irritating and has good biocompatibility. It has a wide range of sources and is environmentally friendly. It is a completely biodegradable aliphatic polyester. The fabric made is comfortable to wear and has good wearability. Janus membrane refers to the membrane material with asymmetric morphology or chemical composition on both sides of the membrane. In a broad sense, asymmetric Janus membrane re...

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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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/37D06M11/46D06M11/38D01F6/62D01D5/00D06M101/32
CPCD06M15/37D06M11/46D06M11/38D01F6/625D01D5/003D01D5/0084D06M2101/32D06M2200/25
Inventor 张秀芹吴晶谷英姝王锐马慧玲任宝娜杨莹雪闵胜男
Owner BEIJING INST OF CLOTHING TECH
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