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p(aaem-st)-coated heart-shaped nano-palladium particle composite

A composite material, nano-palladium technology, applied in the field of nano-materials, can solve problems such as complex preparation system, difficult grain diffusion, and accelerated ion reduction speed, and achieve the effect of promoting thermal degradation and good thermal catalytic performance

Active Publication Date: 2021-03-30
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the palladium salt reaction solution in the presence of various media, polymer-coated nano-palladium particle composites are prepared by ultrasound, and nano-metal palladium particles are prepared by ultrasonic technology, which has a smaller particle size and more Narrow particle size distribution, but some of these methods use reducing agents, such as myristyltrimethylamine bromide, ascorbic acid, etc., which not only participate in chemical reactions, but also lead to faster ion reduction, and the formation of larger seeds, resulting in the formation of Diffusion of the crystal grains is difficult, agglomeration occurs, and the particle size of nano-palladium becomes larger; some scholars prepare nano-palladium particles under the protection of a certain inert atmosphere, but the preparation system becomes complicated.

Method used

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  • p(aaem-st)-coated heart-shaped nano-palladium particle composite
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  • p(aaem-st)-coated heart-shaped nano-palladium particle composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1) AAEM pretreatment: Weigh 10mL AAEM into a 60mL separatory funnel, wash AAEM 3 times with deionized water, remove the polymerization inhibitor in AAEM, and put the lower liquid into a clean Erlenmeyer flask for later use;

[0029] 2) Weigh 0.020gPdCl 2 , add 15mL deionized water once to dissolve, then add 0.8mL AAEM and 2mL styrene, add 25mL deionized water twice, stir well, then add 0.008g potassium persulfate;

[0030] 3) Ultrasonic treatment: the treatment conditions are mode φ22, working time 40min, ultrasonic 1s, intermittent 1s, power 36%, temperature 40°C, to obtain the reaction liquid;

[0031] 4) Washing and drying: slowly pour the reaction solution into a beaker filled with absolute ethanol, stir while pouring, and wash several times until the product changes from black flocculent precipitate to black powder, discard the supernatant, and leave The product was air-dried naturally, and sampled after grinding.

Embodiment 2

[0033] 1) AAEM pretreatment: Weigh 10mL AAEM into a 60mL separatory funnel, wash AAEM 4 times with deionized water, remove the polymerization inhibitor in AAEM, and put the lower liquid into a clean Erlenmeyer flask for later use;

[0034] 2) Weigh 0.080gPdCl 2 , add 25mL deionized water once to dissolve, then add 1.2mL AAEM and 8mL styrene, add 35mL deionized water twice, stir well, then add 0.015g azobisisobutyronitrile;

[0035] 3) Ultrasonic treatment: the treatment conditions are mode φ22, working time 50min, ultrasonic 1s, intermittent 1s, power 36%, temperature 43°C, to obtain the reaction solution;

[0036] 4) Washing and drying: slowly pour the reaction solution into a beaker filled with absolute ethanol, stir while pouring, and wash several times until the product changes from black flocculent precipitate to black powder, discard the supernatant, and leave The product was air-dried naturally, and sampled after grinding.

Embodiment 3

[0038] 1) AAEM pretreatment: Weigh 10mL AAEM into a 60mL separatory funnel, wash AAEM 3 times with deionized water, remove the polymerization inhibitor in AAEM, and put the lower liquid into a clean Erlenmeyer flask for later use;

[0039] 2) Weigh 0.050gPdCl 2 , add 20mL deionized water once to dissolve, then add 1.0mL AAEM and 5mL styrene, add 30mL deionized water twice, stir well, then add 0.012g potassium persulfate;

[0040] 3) Ultrasonic treatment: the treatment conditions are mode φ22, working time 60min, ultrasonic 1s, intermittent 1s, power 36%, temperature 45°C, to obtain the reaction solution;

[0041] 4) Washing and drying: slowly pour the reaction solution into a beaker filled with absolute ethanol, stir while pouring, and wash several times until the product changes from black flocculent precipitate to black powder, discard the supernatant, and leave The product was air-dried naturally, and sampled after grinding.

[0042] Preparation of P(AAEM-St) Composite

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Abstract

The invention discloses a preparation method of a P (AAEM-St) coated heart-shaped nano-palladium grain composite. The preparation method includes steps of weighing PdCl2 and dissolving by deionized water; then adding AAEM and styrene, adding deionized water to stir evenly; adding initiator; through ultrasound treatment, slowly pouring reaction fluid in a flask held with absolute ethyl alcohol, pouring while stirring, washing for many times until the product is changed from black flocculent to be black powder; removing supernatant liquid and naturally air-drying the rest product; grinding and then packaging. Under the conditions of not adding any reducing agent and emulsifier and also not applying nitrogen protection, the P (AAEM-St) coated heart-shaped nano-palladium grain composite is prepared. An interaction force is existed between two ketonic oxygen atoms and palladium atom in a base body P (AAEM-St) long chain, thus the palladium atom is induced to gather and form the heart-shapednano-palladium grain. The existence of the defect structure of the heart-shaped nano-palladium grain in the composite makes that the nano-palladium grain has good thermal catalyst performance; the thermal degradation of the base body P (AAEM-St) is promoted.

Description

technical field [0001] The invention relates to the technical field of nanometer materials, in particular to a method for preparing a P(AAEM-St)-coated heart-shaped nano-palladium particle composite material. Background technique [0002] Nano-metal / polymer composites are formed by dispersing nano-metal particles in a polymer matrix, and have the excellent characteristics of both nano-metal particles and polymers. The effect can have a special effect on the physical and chemical properties of the material, thus endowing the material with unique thermal properties, electrical properties, optical properties, mechanical properties, magnetic properties and superconducting properties, etc., which can be widely used in photonics and electronics , environmental science, biomedicine and information materials science and many other fields. [0003] Nano-palladium has attracted much attention as a good hydrogen storage material, conductive paste, especially heterogeneous catalytic ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F212/08C08F220/28C08K3/08
CPCC08F212/08C08K3/08C08F220/282
Inventor 高圣涛李毅
Owner ANHUI UNIV OF SCI & TECH