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Hydrophilic PVDF material and preparation method thereof

A hydrophilic, PTFE1% technology, applied in the field of hydrophilic PVDF material and its preparation, can solve the problems of complex chemical modification process, unguaranteed durability, difficult implementation, etc., to achieve good outdoor weather resistance, change Fundamental performance, the effect of excellent hydrophilicity

Inactive Publication Date: 2010-07-21
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The effect of surface modification mainly occurs on the surface of the membrane, and the durability cannot be guaranteed. The chemical modification process is complicated and difficult to implement. Compared with the two methods, the method of blending modification is easy to operate and plays a role in the protection of materials. To improve fundamental performance, it is imperative to develop a new method of blending modified PVDF

Method used

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  • Hydrophilic PVDF material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The mass ratio of raw materials is: PVDF 90%, SAN 10%, of which the SAN grade is SAN-178, and the content of acrylonitrile monomer is 26%;

[0021] The prepared raw materials were melted and kneaded into a homogeneous blend in a torque rheometer, where the set temperature of the torque rheometer was 180°C and the rotational speed was 60 rpm. The test results are shown in Table 1.

Embodiment 2

[0023] The mass ratio of raw materials is: PVDF 80%, SAN 20%, of which the SAN grade is SAN-178, and the content of acrylonitrile monomer is 26%;

[0024] The prepared raw materials were melted and banburyed into a homogeneous blend in a torque rheometer. The set temperature of the torque rheometer was 200°C and the rotational speed was 60 rpm. The results of the test are shown in Table 1.

Embodiment 3

[0026] The mass ratio of raw materials is: PVDF 70%, SAN 30%, of which the SAN grade is SAN-168, and the content of acrylonitrile monomer is 33%;

[0027] The prepared raw materials were melted and banburyed into a homogeneous blend in a torque rheometer, where the set temperature of the torque rheometer was 180°C, and the rotational speed was 100 rpm. The test results are shown in Table 1.

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Abstract

The invention discloses a hydrophilic PVDF material and a preparation method thereof. The water contact angle is reduced to about 70 degrees and the hydrophilicity of the PVDF material is greatly improved. The hydrophilic PVDF material is made by the following raw materials in weight percentage: 60 to 90 percent of PVDF, 10 to 40 percent of SAN, 0 to 30 percent of PMMA, 0 to 1 percent of PTFE, and 0 to 1 percent of kaolin, wherein, the SAN is a multipolymer of acrylonitrile and styrene.

Description

technical field [0001] The invention relates to a PVDF material and a preparation method thereof, more specifically to a hydrophilic PVDF material and a preparation method thereof. Background technique [0002] PVDF, or polyvinylidene fluoride, is a semi-crystalline material with good physical and chemical properties, such as high strength, good toughness, corrosion resistance, good outdoor weather resistance, and good chemical stability, so it is used in many fields Has been widely used. In particular, the PVDF molecular structure contains -C-F-bonds with high bond energy, which endows this material with good temperature resistance, corrosion resistance, and solvent resistance. Only N, N-dimethylformyl (DMF), Strong polar organic solvents such as dimethylacetamide (DMAC) can dissolve it. Therefore, PVDF is a membrane material with excellent performance. In recent years, my country has developed PVDF flat microporous membranes, hollow fiber membranes, and flat ultrafiltra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/16C08L25/12C08K3/34B29B7/00C08L33/12C08L27/18
Inventor 张军马文中陈双俊王晓琳夏琴赵学娟
Owner NANJING TECH UNIV