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Preparation method of PVDF/silicon dioxide aerogel membrane material

A technology of silica and airgel, which is applied in the manufacture of rayon, chemical characteristics of fibers, and artificial filaments of single-component halogenated hydrocarbons. It can solve the problems of difficult preparation of nanofibers, and achieve environmental pollution prevention and short cycle time. Effect

Active Publication Date: 2021-08-20
苏州热象纳米科技有限公司
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  • Summary
  • Abstract
  • Description
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  • 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 of PVDF in 60g of N,N-dimethylformamide to form a PVDF precursor solution, and disperse 10g of silica airgel in 20g of n-ethane to form a silica airgel precursor solution;

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

[0015] S3: Hot press the PVDF fiber and silica airgel 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 airgel Glue composite film.

example 2

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

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

[0019] S3: Hot press the PVDF fiber and silica airgel composite nonwoven 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, and the PVDF / silica airgel is obtained Glue composite film.

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Abstract

The invention discloses a preparation method of a PVDF / silicon dioxide aerogel membrane material, and belongs to the field of nano thermal insulation materials. According to the method, PVDF and silicon dioxide aerogel are prepared into a spinning precursor solution, a PVDF fiber / silicon dioxide aerogel non-woven membrane material is prepared through two sets of needle heads by adopting the electrostatic spinning technology, then the PVDF / silicon dioxide aerogel membrane material is formed through hot pressing, and the prepared PVDF / silicon dioxide aerogel membrane material is good in flexibility and free of powder falling.

Description

technical field [0001] The invention relates to a method for preparing a PVDF / silicon dioxide airgel membrane material, which belongs to the field of nano thermal insulation materials. Background technique [0002] Airgel is a network porous structure with high porosity. It is the best material for thermal insulation among existing materials. The particle size of its powder is generally above 10 microns. Because its density is only 40 kg / m 3 , so it will float in the air for a long time during use, causing dust pollution problems. The airgel felt currently on the market is a composite product of airgel and glass fiber, and the powder shedding is serious during use. This is mainly because the glass fibers are too thick to hold the airgel powder inside the mat. If the airgel powder is to be completely fixed inside, nano-scale fibers are needed to fix the airgel in the membrane well, otherwise dust pollution will easily occur. While conventional spinning process is difficult...

Claims

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Application Information

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Patent Type & Authority Applications(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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