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PVDF (Polyvinylidene Fluoride)/PVA (Polyvinyl Acetate)/nanometer SiO2 composite membrane

A composite film and nanotechnology, applied in the field of blended materials, can solve the problems of high melt viscosity and poor thermal conductivity, and achieve the effects of good stain resistance, increased mechanical strength, and delayed aging.

Inactive Publication Date: 2013-05-08
青岛博益特生物材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its thermal conductivity is poor and its melt viscosity is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1 A kind of PVDF / PVA / nanometer SiO 2 Composite film

[0015] Weigh 8g PVDF, 2g PVA dissolved in 38g DMSO, stir at 80°C for 8h, and mix well. Weigh 1.5g nano-SiO 2 Powder, 0.5g titanate coupling agent, mixed evenly to form a film. The water flux of the obtained membrane is 2889L / m for the composite membrane 2 h, porosity 87.6%.

Embodiment 2

[0016] Embodiment 2 A kind of PVDF / PVA / nanometer SiO 2

[0017] Weigh 7g of PVDF and 3g of PVA in 38g of DMSO, stir at 80°C for 8h, and mix well. Weigh 2g nano-SiO 2 Powder, 0.6g titanate coupling agent, mixed evenly to form a film. The water flux of the obtained membrane is 2900L / m 2 h, porosity 91.6%.

Embodiment 3

[0018] Embodiment 3 A kind of PVDF / PVA / nanometer SiO 2 Composite film

[0019] Weigh 6g PVDF, 4g PVA dissolved in 38g DMSO, stir at 80°C for 8h, and mix well. Weigh 1.5g nano-SiO 2 Powder, 0.5g titanate coupling agent, mixed evenly to form a film. The water flux of the obtained membrane is 2855L / m 2 h, porosity 85.6%.

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Abstract

The invention discloses a PVDF (Polyvinylidene Fluoride) / PVA (Polyvinyl Acetate) / nanometer SiO2 composite membrane. PVA, PVDF and nanometer SiO2 are co-mixed to form the film, so that the mechanical strength and the ageing resistance of the membrane are improved; the composite membrane is provided with good strain resistance, flame resistance and low smoke; and in particular, the ageing of the membrane is delayed by virtue of the aging resistance under ultraviolet radiation. The PVDF (Polyvinylidene Fluoride) / PVA (Polyvinyl Acetate) / nanometer SiO2 composite membrane can be used as a solar cell back membrane with excellent performances, so that bad environments such as sand storms, hails and the like can be resisted.

Description

technical field [0001] The invention relates to the field of blended materials, in particular to a PVDF / PVA / nanometer SiO 2 Composite film. Background technique [0002] PVDF (Polyvinylidene Fluoride) is a homopolymer of vinylidene fluoride with the molecular formula -[CF 2 -CH 2 ] n -. PVDF has excellent weather resistance, low permeability to most gases and liquids, and anti-ultraviolet and nuclear radiation, heat resistance, corrosion resistance, aging resistance, high mechanical strength, good processing performance and long service life. However, its thermal conductivity is poor and its melt viscosity is high. [0003] PVA (polyvinyl alcohol, Polyvinyl Alcohol), the molecular formula is -[CH 2 -CHOH] n -. PVA is a water-soluble polyol polymer. PVA is non-toxic and tasteless, white flocculent or flaky solid, with high mechanical strength, good crystallinity, light transmittance, thermal stability and chemical stability. [0004] Nano silica is one of the extrem...

Claims

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Application Information

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IPC IPC(8): C08L27/16C08L29/04C08K3/36C08J5/18
Inventor 冯伊林李叶宋福来曹亮
Owner 青岛博益特生物材料股份有限公司
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