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A kind of preparation method of PVDF/silica airgel film material

A silica and aerogel technology, which is applied in the manufacture of rayon, chemical characteristics of fibers, textiles and papermaking, etc., can solve the problems of difficult to prepare nanofibers, and achieve the effect of preventing environmental pollution and short cycle.

Active Publication Date: 2022-06-21
苏州热象纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While conventional spinning process is difficult to prepare nanofibers, electrospinning technology can prepare fibers ranging from tens to hundreds of nanometers, which is very suitable for fixing airgel particles and preparing downstream application products of airgel powder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0013] S1: Dissolve 10g PVDF in 60g N,N-dimethylformamide to form a PVDF precursor solution, and disperse 10g silica aerogel in 20g n-ethane to form a silica aerogel precursor solution;

[0014] S2: Using the electrospinning method, the PVDF precursor solution and the silica aerogel precursor solution prepared in step S1 are simultaneously spun to obtain a composite non-woven film of PVDF fiber and silica aerogel. The spinning voltage 13kV, receiving distance 15cm, spinning speed 10ml / hour;

[0015] S3: hot pressing the PVDF fiber and silica aerogel composite non-woven membrane obtained in step S2, the hot pressing temperature is 200 degrees, the pressure is 2 MPa, and the hot pressing time is 20 seconds to obtain PVDF / silica aerogel Adhesive composite film.

example 2

[0017] S1: Dissolve 10g PVDF in 40g N-methylpyrrolidone to form a PVDF precursor solution, and disperse 10g silica aerogel in 30g n-ethane to form a silica aerogel precursor solution;

[0018] S2: Using the electrospinning method, the PVDF precursor solution and the silica aerogel precursor solution prepared in step S1 are simultaneously spun to obtain a composite non-woven film of PVDF fiber and silica aerogel. The spinning voltage 15kV, receiving distance 20cm, spinning speed 15ml / hour;

[0019] S3: hot pressing the PVDF fiber and silica aerogel composite non-woven membrane obtained in step S2, the hot pressing temperature is 250 degrees, the pressure is 1 MPa, and the hot pressing time is 10 seconds to prepare PVDF / silica aerogel Adhesive composite film.

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Abstract

The invention discloses a method for preparing a PVDF / silicon dioxide airgel film material, which belongs to the field of nano thermal insulation materials. PVDF and silica airgel are prepared into spinning precursor solution, and the PVDF fiber / silica airgel non-woven film is prepared by electrospinning technology through two sets of needles, and then hot-pressed to form The PVDF / silicon dioxide airgel membrane material, the PVDF / silicon dioxide airgel membrane material prepared by the present invention has good flexibility and does not drop powder.

Description

technical field [0001] The invention relates to a preparation method of a PVDF / silica aerogel membrane material, and belongs to the field of nano thermal insulation materials. Background technique [0002] Aerogel is a network porous structure with high porosity, which is the best thermal insulation material among existing materials. Its powder particle size is generally above 10 microns, and its density is only 40 kg / m. 3 , so it will float in the air for a long time during use, resulting in dust pollution problems. At present, the aerogel felt on the market is a composite product of aerogel and glass fiber, and the powder is seriously lost during use. This is mainly because the glass fibers are too thick to hold the aerogel powder inside the felt. If the aerogel powder is to be completely fixed inside, nano-scale fibers are needed to well fix the aerogel in the membrane, otherwise it is easy to produce dust pollution. While conventional spinning process is difficult to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B30/02D01F6/48D01F1/10
CPCC04B30/02D01F6/48D01F1/10C04B14/064C04B16/0625
Inventor 侯远
Owner 苏州热象纳米科技有限公司
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