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Temperature-sensitive polyvinylidene fluoride/precious metal nanoparticle hybrid membrane and preparation method thereof

A polyvinylidene fluoride, nanoparticle technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, etc., can solve the problem of poor pollution resistance, polyvinylidene fluoride Ethylene does not have problems such as catalytic properties and temperature sensitivity, and achieves the effects of easy industrialization, simple equipment and simple process

Inactive Publication Date: 2014-06-18
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the existing polyvinylidene fluoride (PVDF) membrane does not have catalytic properties and temperature sensitivity, and the pollution resistance is not good.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Preparation of temperature sensitive polymer gel: take 5.0g monomer N-isopropylacrylamide (NIPAM), 2.0g (meth)acrylic acid monomer, 0.05g initiator azobisisobutyronitrile (AIBN), 0.3g cross-linking agent N, N'-methylenebisacrylamide (MBAA) and 500ml absolute ethanol, pass N 2 After 30 minutes, the system was sealed and reacted at a constant temperature of 70°C for 8 hours; the solution after the reaction was centrifuged, precipitated, and vacuum-dried at 60°C for 24 hours to obtain a solid product PNIPAM gel;

[0023] (2) Preparation of temperature-sensitive polymer gel / gold nanoparticle hybrid: disperse 4 g of the PNIPAM gel obtained in step (1) into 20 mL of ethanol, add 0.05 g of gold chloride and 0.1 g of sodium borohydride, and keep the temperature at 20 ° C React for 24 hours, centrifuge, precipitate, and vacuum dry at 60°C for 24 hours to obtain a PNIPAM gel / gold nanoparticle hybrid;

[0024](3) Preparation of casting solution: the PVDF powder and the PNIPAM...

Embodiment 2

[0027] (1) with embodiment 1;

[0028] (2) Preparation of intelligent polymer gel / palladium nanoparticle hybrid: disperse 4 g of PNIPAM gel obtained in step (1) into 20 mL of ethanol, add 0.05 g of palladium chloride and 0.1 g of sodium borohydride, at 20 ° C React at constant temperature for 24 hours, centrifuge, precipitate, and vacuum dry at 60°C for 24 hours to obtain a PNIPAM gel / palladium nanoparticle hybrid;

[0029] (3) Preparation of casting solution: the PVDF powder and the PNIPAM gel / palladium nanoparticle hybrid prepared in step (2) were dispersed in N,N-dimethylformamide (DMF) in different blending ratios, 65 Stir at ℃ to obtain a completely transparent solution, leave it to stand under vacuum for degassing for 2h, and obtain the PNIPAM gel / gold nanoparticle hybrid content of 0wt%, 0.5wt%, 10wt%, 20wt%, 30wt% and 40wt%, mass Concentration is the casting liquid of 16wt%;

[0030] (4) Preparation of temperature-sensitive PVDF / precious metal nanoparticle hybrid fil...

Embodiment 3

[0032] (1) with embodiment 1;

[0033] (2) Preparation of intelligent polymer gel / silver nanoparticle hybrid: disperse 4 g of the PNIPAM gel obtained in step (1) into 20 mL of ethanol, add 0.05 g of silver nitrate and 0.1 g of sodium borohydride, and keep the temperature at 20 ° C React for 24 hours, centrifuge, precipitate, and vacuum dry at 60°C for 24 hours to obtain a PNIPAM gel / silver nanoparticle hybrid;

[0034] (3) Preparation of casting solution: the PVDF powder and the PNIPAM gel / silver nanoparticle hybrid prepared in step (2) were dispersed in N, N-dimethylformamide (DMF) in different blending ratios, 65 Stir at ℃ to obtain a completely transparent solution, leave it to stand under vacuum for degassing for 2h, and obtain PNIPAM gel / silver nanoparticle hybrid content of 0wt%, 0.5wt%, 10wt%, 20wt%, 30wt% and 40wt%, mass Concentration is the casting liquid of 16wt%;

[0035] (4) Preparation of temperature-sensitive PVDF / precious metal nanoparticle hybrid film: Pour t...

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Abstract

The invention relates to a temperature-sensitive polyvinylidene fluoride / precious metal nanoparticle hybrid membrane and a preparation method thereof. With combination of hydrophilicity and temperature sensitive of a polymer gel, high catalytic activity of precious metal nanoparticles, and corrosion resistance and good film-forming property of polyvinylidene fluoride, the hybrid membrane with good anti-pollution ability, temperature-sensitive catalytic activity and separation property is prepared. The temperature-sensitive polyvinylidene fluoride / precious metal nanoparticle hybrid membrane can be used for catalyzing a reduction reaction of nitro in amino nitrobenzene, nitrophenol, nitrobenzene, methyl nitrobenzene, dimethyl nitrobenzene, cyano nitrobenzene, chloronitrobenzene, vinyl nitrobenzene, nitrocyclohexane and other molecules to transform nitro into amino.

Description

technical field [0001] The invention relates to a temperature-sensitive polyvinylidene fluoride (PVDF) / noble metal nanoparticle hybrid membrane and a preparation method thereof, in particular to a temperature-sensitive high molecular polymer gel / noble metal nanoparticle hybrid and polyvinylidene fluoride The polyvinylidene fluoride / noble metal nanoparticle hybrid membrane obtained by blending ethylene (PVDF) and having membrane pores and catalytic activity adjustable with temperature and a preparation method thereof belong to the field of polymer science and technology. Background technique [0002] Polyvinylidene fluoride (PVDF) has excellent aging resistance and UV resistance, and has good chemical stability. It is not corroded by strong oxidants such as acids and alkalis and halogens at room temperature. It also has excellent thermal stability and mechanical strength. It is a Separation membrane material with good comprehensive performance. At present, PVDF separation me...

Claims

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Application Information

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IPC IPC(8): C08L27/16C08L33/24C08L33/14C08K3/08C08F220/54C08F220/06C08F220/34C08J5/18B01D71/34B01D69/02B01D67/00B01J31/26B01J31/28
Inventor 陈熙陈莉何洋毕世胤杨青盛慧滢
Owner TIANJIN POLYTECHNIC UNIV
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