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Janus structure polymer-based nano-metal catalyst as well as preparation method and application thereof

A technology of structural polymers and nano-metals, which is applied in the direction of catalyst activation/preparation, preparation of organic compounds, organic compound/hydride/coordination complex catalysts, etc. It can solve the problems of chemical composition partitioning and microstructure precise control technology. Improvement and other issues, to achieve good emulsification effect, shorten the preparation time, and good stability

Active Publication Date: 2021-07-23
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Methods such as interface protection, microfluidic synthesis, self-assembly and seed emulsion polymerization can be used to prepare Janus materials, but the precise control technology of chemical composition partitioning and microstructure needs to be further improved

Method used

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  • Janus structure polymer-based nano-metal catalyst as well as preparation method and application thereof
  • Janus structure polymer-based nano-metal catalyst as well as preparation method and application thereof
  • Janus structure polymer-based nano-metal catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Weigh 0.13g sodium lauryl sulfate, 125mL H 2 O is dissolved in the reactor under room temperature with mechanical stirring, while adding 10.42g styrene and 0.33g divinylbenzene, and continuously feeding N 2 After 30 minutes, the temperature of the reaction system was raised to 80°C, and the mixed solution of 0.19g potassium persulfate and 19mL water was slowly added dropwise, and the polymerization was carried out at constant temperature for 10 hours. After the reaction was completed, the reaction solution was cooled to room temperature, and 60 mL of H 2 O, 6.04g p-chloromethyl styrene, 0.12g divinylbenzene, continue to swell for 4h and then raise the temperature to 60°C, and add dropwise 0.24g potassium persulfate, 0.18g NaHSO 3 with 15mL H 2 The mixed solution of O, continuous reaction 5h obtains seed emulsion;

[0044] Weigh 10g of the above seed emulsion, 10g of H 2 O and 0.33g sodium lauryl sulfate in a reactor, mechanically stirred until sodium lauryl sulfate ...

Embodiment 2

[0047] Weigh 0.13g sodium lauryl sulfate, 125mL H 2 O is dissolved in the reactor under room temperature with mechanical stirring, while adding 10.42g styrene and 0.33g divinylbenzene, and continuously feeding N 2 After 30 minutes, the temperature of the reaction system was raised to 80°C, and the mixed solution of 0.19g potassium persulfate and 19mL water was slowly added dropwise, and the polymerization was carried out at constant temperature for 10 hours. After the reaction was completed, the reaction solution was cooled to room temperature, and 60 mL of H 2 O, 6.04g p-chloromethyl styrene, 0.12g divinylbenzene, continue to swell for 4h and then raise the temperature to 60°C, and add dropwise 0.24g potassium persulfate, 0.18g NaHSO 3 with 15mL H 2 The mixed solution of O, continuous reaction 5h obtains seed emulsion;

[0048] Take by weighing 20g above-mentioned seed emulsion, 20g H 2 O and 0.66g sodium lauryl sulfate in a reactor, mechanically stirred until the sodium ...

Embodiment 3

[0050] Weigh 0.22g sodium lauryl sulfate, 125mL H 2 O was dissolved in the reactor under mechanical stirring at room temperature, while adding 20.83g styrene, 0.33g divinylbenzene, and continuously feeding N 2 After 30 minutes, the temperature of the reaction system was raised to 80°C, and the mixed solution of 0.4g potassium persulfate and 30mL water was slowly added dropwise, and the polymerization was carried out at constant temperature for 12h. After the reaction was completed, the reaction solution was cooled to room temperature, and 100 mL of H 2 O, 12.2g p-chloromethyl styrene, 0.25g divinylbenzene, continue to swell for 6h and then raise the temperature to 60°C, and add dropwise 0.24g potassium persulfate, 0.18g NaHSO 3 with 15mLH 2 The mixed solution of O is continuously reacted for 8h to obtain the seed emulsion;

[0051] Take by weighing 20g above-mentioned seed emulsion, 40g H 2 O and 1.32g sodium lauryl sulfate in the reactor, mechanical stirring until sodium ...

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Abstract

The invention discloses a Janus structure polymer-based nano-metal catalyst and a preparation method and application thereof. A Janus structure polymer carrier is obtained through a seed emulsion polymerization method by means of the characteristic that polymer nanoparticles are high in designability, and the Janus structure polymer-based nano-metal catalyst is obtained through activation, metal ion impregnation exchange and metal ion in-situ reduction. Nano-metal is immobilized on the surface of a Janus structure polymer carrier to obtain the Janus structure polymer-based nano-metal catalyst, the preparation method of the catalyst is simple and controllable, and the feasibility of large-scale production is achieved; and selective loading of noble metal on the surface of the carrier is realized. The catalyst provided by the invention is applied to heterogeneous reaction, can stabilize Pickering emulsion, and has excellent catalysis and recycling effects.

Description

technical field [0001] The present invention relates to a kind of Janus structure polymer-based nanometer metal catalyst and its preparation method and application. Background technique [0002] Precious metals are expensive and scarce in reserves, and are widely used in reactions such as hydrogenation / dehydrogenation, oxidation / reduction, and asymmetric synthesis due to their high catalytic activity and selectivity. Generally speaking, in order to improve the efficiency of the use of precious metals, they are usually supported on various functional materials (including polymers, metal oxides, zeolites, carbon materials, etc.), but no matter what kind of support is used, its Compared with the homogeneous catalyst, the catalytic activity in the reaction needs to be further improved. [0003] As a new emulsification technology using nano-micron particles as a stabilizer, Pickering emulsion has become a research hotspot in the fields of chemical industry, materials, food scien...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/28B01J31/06B01J37/02B01J37/16B01J37/32C07C213/02C07C215/76C08F212/08C08F212/36C08F212/14
CPCB01J31/28B01J31/06B01J37/0201B01J37/16B01J37/32C07C213/02C08F212/08B01J2231/641B01J35/393B01J35/23C07C215/76C08F212/36C08F212/18Y02P20/584
Inventor 王建黎周雪邹思远刘小波张浩
Owner ZHEJIANG UNIV OF TECH
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