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Polymeric nanofiber-based aerogel material and preparation method thereof

A technology of nanofibers and polymers, which is applied in the field of polymer nanofiber-based airgel materials and its preparation, can solve the problems of single airgel raw materials, and achieve a safe and healthy preparation process, simple process flow, and good mechanical properties Effect

Active Publication Date: 2016-10-12
武汉维晨科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shortcoming of this invention is that the raw material for preparing airgel is relatively single

Method used

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  • Polymeric nanofiber-based aerogel material and preparation method thereof
  • Polymeric nanofiber-based aerogel material and preparation method thereof

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preparation example Construction

[0049] A preparation method of a polymer nanofiber-based airgel material, comprising the following preparation steps:

[0050] 1) Preparation of polymer nanofibers: After mixing the thermoplastic polymer and cellulose acetate butyrate uniformly, the polymer nanofiber precursors are prepared by melt extrusion and drafting; the polymer nanofiber precursors are subjected to Acetone extraction to remove cellulose acetate butyrate to obtain polymer nanofibers;

[0051] In order to better realize the technical solution of the present invention, the thermoplastic polymer is one of polyesters, polyamides or polyolefin copolymers.

[0052] Further, the polyester is one of PET, PTT, PBT, and PBAT, the polyamide is one of PA6, PA66, PA12, and PA1010, and the polyolefin copolymer is PVA-co- One of PE, PE-co-GMA.

[0053] Wherein, the mass percentage of thermoplastic polymer and cellulose acetate butyrate is preferably 20:80.

[0054] 2) Preparation of polymer nanofiber dispersion: add ...

Embodiment 1

[0063] 1) Preparation of polymer nanofiber: get 20g polyester copolymer, preferably PET (also can be a kind of in PTT, PBT or Ecoflex) in the present embodiment, after mixing evenly with 80g cellulose acetate butyrate, The polymer nanofiber precursor is prepared by melt extrusion and drafting of a twin-screw extruder; and cellulose acetate butyrate is used as a matrix; the polymer nanofiber precursor is extracted with acetone to remove the cellulose acetate butyrate matrix, obtaining polymer nanofibers;

[0064] 2) Preparation of polymer nanofiber dispersion: add the polymer nanofibers prepared in step 1) to 50 g of water, and the mass percentage of polymer nanofibers and water is 1:99, and shear by an emulsifier, wherein, shear The speed is 5000r / min, and a uniformly dispersed polymer nanofiber dispersion is obtained;

[0065] 3) Preparation of polymer nanofiber-based airgel material: adding polyvinyl alcohol crosslinking agent to the polymer nanofiber dispersion prepared in...

Embodiment 2

[0067] 1) Preparation of polymer nanofibers: take 20g of polyamide copolymer, preferably PA66 in this embodiment, mix it with 80g of cellulose acetate butyrate evenly, melt extrude through a twin-screw extruder, and draw to prepare polymer nanofiber precursors; and cellulose acetate butyrate as a matrix; the polymer nanofiber precursors are extracted with acetone, and the cellulose acetate butyrate matrix is ​​removed to obtain polymer nanofibers;

[0068] 2) Preparation of polymer nanofiber dispersion: mix 90g of ethanol with 10g of water to obtain a water-based solvent, add the polymer nanofibers prepared in step 1) into the water-based solvent, and the mass percentage of polymer nanofibers and water-based solvent is 5 : 95, sheared by an emulsifier, wherein the shear speed is 8000r / min, to obtain a uniformly dispersed polymer nanofiber dispersion;

[0069] 3) Preparation of polymer nanofiber-based airgel material: adding a polyethylene glycol crosslinking agent to the polym...

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Abstract

The invention discloses a polymeric nanofiber-based aerogel material and a preparation method thereof, and belongs to the fields of aerogel materials and preparation methods thereof. The preparation method comprises the steps that a thermoplastics polymer and cellulose acetate butyrate are subjected to melt blending, drawing, extracting and the like to prepare polymeric nanofibers, the polymeric nanofibers are added into water or a water solvent prepared from water and an organic solvent to generate polymeric nanofiber dispersion liquid, a cross-linking reaction is conducted to obtain cross-linked polymeric nanofiber suspension liquid, freeze drying is conducted on the cross-linked polymeric nanofiber suspension liquid, and then the polymeric nanofiber-based aerogel material is prepared. The polymeric nanofiber-based aerogel material prepared through the method has the advantages of being obvious in nanofiber porous structure, good in mechanical property and the like. The material prepared through the method can be applied to the fields of air filtration, thermal insulation, adsorption and the like directly or by being composited with other materials.

Description

technical field [0001] The invention belongs to the field of airgel materials and preparation methods, and in particular relates to a polymer nanofiber-based airgel material and a preparation method thereof. Background technique [0002] Airgel is the dried product of hydrogel or organic gel, which is currently the lightest solid material in the world. It has a nano-scale pore structure with a specific surface area of ​​500-1200m 2 g -1 , The porosity reaches over 90%. This special structure endows airgel with many excellent properties, making it have a bright future in thermal insulation, sound insulation, catalysis, adsorption and so on. Its applications can involve aerospace, construction, biochemistry, oil spills and many other fields. [0003] Due to the porous structure of airgel and its nano-scale pores, the skeleton strength of airgel is low, resulting in low toughness, poor mechanical properties, and unstable structure of airgel, so its practical application is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/14C08L67/02C08L77/02C08L77/06C08L23/08C08L51/06C08J9/28C08J3/24
CPCC08J3/24C08J9/28C08J2205/026C08J2301/14C08L1/14C08L67/02C08L77/06C08L77/02C08L23/0853C08L51/06
Inventor 刘琼珍王栋陈佳慧鲁振坦王博刘轲李沐芳
Owner 武汉维晨科技有限公司
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