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Skin-core structure aerogel composite fibers as well as preparation method and application thereof

A composite fiber and skin-core structure technology, applied in fiber processing, fiber chemical characteristics, rayon manufacturing, etc., can solve the problems of airgel failure, uniform mixing, etc., and achieve complete preservation, uniform composite, and excellent thermal insulation performance Effect

Pending Publication Date: 2018-07-27
苏州同玄新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the defects of this process are also relatively prominent, such as airgel particles are light, it is difficult to mix evenly with polymer materials; generally polymers and aerogels have the same polarity, and polymers can easily enter the airgel pores when they melt, resulting in Airgel failure and other issues

Method used

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  • Skin-core structure aerogel composite fibers as well as preparation method and application thereof
  • Skin-core structure aerogel composite fibers as well as preparation method and application thereof
  • Skin-core structure aerogel composite fibers as well as preparation method and application thereof

Examples

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preparation example Construction

[0039] An aspect of the embodiments of the present invention provides a method for preparing a skin-core structure airgel composite fiber, which includes:

[0040] Using the skin-core composite spinning technology, the airgel particles and the polymer material in the molten state are compounded at the end of the spinneret hole, and the wire drawing and cooling are performed simultaneously to form a skin-core structure airgel composite fiber. The gel composite fiber includes a core comprising airgel particles, and a sheath covering the core, the sheath comprising a polymeric material.

[0041] In some embodiments, the preparation method includes: using skin-core composite spinning technology, extruding the airgel particles into the void formed by the polymer material to form a skin-core structure airgel composite fiber .

[0042] The principle of the preparation process of the present invention is: through the sheath-core composite spinning method, the fluidity of the airgel pow...

Embodiment 1

[0075] Using a two-component melt-blown nonwovens production line, PP (polypropylene, Sinopec T03-H) is used as the A component, and the cortex is melt-extruded at 190°C; at the same time, the silica airgel powder G200 ( Suzhou Tongxuan New Material Co., Ltd.) as component B, the core layer; using concentric spinneret holes, the airgel powder is extruded synchronously with PP in the form of a tube at 100 ° C, and the extrusion speed of PP is 0.1 g / hole / min, the extrusion speed of airgel powder is 0.02g / hole / min. The melted filaments are cooled by air flow to form PP airgel composite fibers.

[0076] The structure of the PP airgel composite fiber obtained in this example is concentric, the composite fiber diameter is 40 μm, the fiber wall thickness is 10 μm, the mass proportion of airgel particles in the composite fiber is about 15wt%, and the thermal conductivity of the composite fiber The coefficient is 0.02w / m·k, and the tensile strength of the composite fiber is enhanced b...

Embodiment 2

[0078] A two-component melt-blown nonwoven fabric production line is adopted, and PET (poly(ethylene glycol terephthalate), DuPont FR945 in the United States) is used as the A component, and the cortex is melt-extruded at 270°C; Dialuminum airgel powder is used as component B, the core layer; the airgel powder is extruded synchronously with PET in the form of a tube at 50°C by using a three-lobed spinneret hole, and the extrusion speed of PET is 0.1g / hole / min, the extrusion speed of the airgel powder is 0.01g / hole / min. The melted filaments are cooled by air flow to form PET airgel composite fibers.

[0079] The PET airgel composite fiber obtained in this example has a three-lobe structure, the diameter of the composite fiber is 30 μm, the fiber wall thickness is 8 μm, the mass ratio of the airgel particles in the composite fiber is about 10 wt%, and the thermal conductivity of the composite fiber The coefficient is 0.03w / m·k.

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Abstract

The invention discloses skin-core structure aerogel composite fibers as well as a preparation method and application thereof. The preparation method comprises the following steps: treating aerogel particles and a polymer material through a skin-core compound spinning method, and carrying out synchronous compounding on the aerogel particles and the polymer material with a molten state at the tail end of a spinneret orifice through a guide pipe structure or a slit structure; synchronously carrying out wire drawing and cooling to form the skin-core structure aerogel composite fibers, wherein theskin-core structure aerogel composite fibers comprises a core containing the aerogel particles and a skin layer covering the core and the skin layer comprises the polymer material. The preparation method disclosed by the invention has the advantages of simple production technology, uniform aerogel-polymer compounding, complete preservation of an aerogel structure, advanced production equipment andthe like; the obtained skin-core structure aerogel composite fibers have the characteristics of excellent heat insulation performance, heat preservation effect, sound isolation performance, adsorption and filtering performance, thermal stability, no dust, economical efficiency and environmental protection and the like, and have a great application potential in the fields of clothing, home textiles, industrial heat preservation, adsorption and filtering and the like.

Description

technical field [0001] The present invention relates to a method for preparing an airgel composite fiber, in particular to a skin-core structure polymer-aerogel composite fiber and its preparation method, as well as its application in synthesizing thermal insulation composite fibers and synthetic composite fiber products. The invention belongs to the technical field of synthetic fiber preparation. Background technique [0002] Airgel is called "blue smoke" or "solid smoke", which is a new ultra-light and porous nano-material with high specific surface area, high porosity, low density, ultra-high thermal insulation performance, and ultra-low dielectric constant As well as excellent properties such as low refractive index, it has broad application prospects in the fields of heat insulation, energy saving and environmental protection, petrochemical industry, drug release, aerospace and other fields. At present, airgel in the market is gradually out of military use, and is beco...

Claims

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Application Information

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IPC IPC(8): D01F8/06D01F8/18D01F8/14D01F8/12D01F8/08D01F8/10D01F8/16D01D5/34D01D5/253D01D5/24
CPCD01D5/24D01D5/253D01D5/34D01F8/06D01F8/08D01F8/10D01F8/12D01F8/14D01F8/16D01F8/18
Inventor 王璇林润俊
Owner 苏州同玄新材料有限公司
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