Nanogold-containing polyvinyl pyrrolidone/poly (N-vinylcaprolactam) hybrid microgel and preparation method thereof

A technology of polyvinylpyrrolidone and vinylcaprolactam, applied in the direction of nanotechnology, nanotechnology, metal processing equipment, etc., can solve the problem of limiting the selection of functional components, and achieve the effect of multi-selectivity

Pending Publication Date: 2022-03-11
沈阳先进涂层材料产业技术研究院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the traditional in-situ reduction method, in most cases, the external reducing agent cannot selectively react only with the gold precursor in the microgel, and when there is a gold precursor outside the microgel, it will lead to a large number of free gold nanoparticles.

Method used

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  • Nanogold-containing polyvinyl pyrrolidone/poly (N-vinylcaprolactam) hybrid microgel and preparation method thereof

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preparation example Construction

[0027] A preparation method of polyvinylpyrrolidone / polyN-vinylcaprolactam hybrid microgel containing nano-gold, comprising the steps of:

[0028] Step 1. Preparation of self-reducing polyvinylpyrrolidone / poly(N-vinylcaprolactam) composite microgel.

[0029] Take 100-300 parts of secondary distilled water, pour it into a three-necked flask, take vinylpyrrolidone, ethylene glycol dimethacrylate, azobisisobutylamidine hydrochloride, dissolve it in distilled water and pour it into the bottle , turn on the overhead stirrer to stir; pass through the nitrogen to fully exhaust the oxygen, and then put the reaction device into a constant temperature water bath for about 3-7 hours to react to obtain polyvinylpyrrolidone latex; take 200 parts of twice distilled water and 10-20 parts Pour polyvinylpyrrolidone latex into a three-necked flask; take the initiator persulfate or the mixed solution of tetramethylethylenediamine and ammonium persulfate, N-vinylcaprolactam, N,N'-methylene base ...

Embodiment 1

[0039]Put 3 parts of vinylpyrrolidone, 0.9 parts of ethylene glycol dimethacrylate, 0.25 parts of azobisisobutylamidine hydrochloride and 300 parts of distilled water into a three-necked flask, stir with a stirrer at 300 rpm / min; feed nitrogen into the system 15ml / min, to fully remove the oxygen in the system; place the bottle in constant temperature water at 60°C for 6 hours of reaction. The reaction process is protected by nitrogen. After the reaction, polyvinylpyrrolidone latex is obtained; 10 parts of polyvinylpyrrolidone latex and 200 parts of twice distilled water are poured into a three-necked flask; 5 parts of N-vinylcaprolactam, 0.2 parts of persulfuric acid Potassium, 1 part of N,N'-methylenebisacrylamide, dissolved in distilled water and poured into the bottle; stirrer at 300rpm / min, after removing the oxygen in the system, put the bottle into 70°C constant temperature water, and react 6 Hours, polyvinylpyrrolidone / poly(N-vinylcaprolactam) microgels were obtained. ...

Embodiment 2

[0042] Put 6 parts of vinylpyrrolidone, 0.8 parts of ethylene glycol dimethacrylate, 0.25 parts of azobisisobutylamidine hydrochloride and 300 parts of distilled water into a three-necked flask, stir with a stirrer at 200 rpm / min; feed nitrogen into the system 17ml / min to fully remove the oxygen in the system; place the bottle in constant temperature water at 60°C for 6 hours of reaction. The reaction process is protected by nitrogen. After the reaction, after the obtained polyvinylpyrrolidone latex is purified, 10 parts of polyvinylpyrrolidone latex and 200 parts of twice distilled water are poured into a three-necked flask; 8 parts of N-vinylcaprolactam, 0.34 1 part of potassium persulfate, 1.6 parts of N,N'-methylenebisacrylamide, dissolved in distilled water and poured into the bottle; stirrer at 200rpm / min, remove the oxygen in the system and put the bottle into 70℃ constant temperature water, React for 6 hours to obtain polyvinylpyrrolidone / poly(N-vinylcaprolactam) micro...

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Abstract

The invention belongs to the field of preparation of nano noble metal particle-containing hybrid microgel materials, and particularly relates to nano gold-containing polyvinyl pyrrolidone/poly (N-vinylcaprolactam) hybrid microgel and a preparation method of the nano gold-containing polyvinyl pyrrolidone/poly (N-vinylcaprolactam) hybrid microgel. The preparation method comprises the following steps: firstly, synthesizing polyvinyl pyrrolidone/poly (N-vinylcaprolactam) intelligent composite microgel through a seed soap-free emulsion polymerization method, and then reacting with a chloroauric acid (HAuCl4) solution by utilizing the reducibility of the polyvinyl pyrrolidone component in the microgel, so as to reduce gold ions into simple substance nanogold. And changing synthesis conditions and experimental formulas to obtain the hybrid microgels with different forms, different gold nanoparticle contents and different performances. In the final product, the size of the gold nanoparticles is 5-80 nm, and the size of the gold nanoparticles can be regulated and controlled through reaction conditions. The obtained hybrid microgel material organically combines the photo-thermal conversion capability of the gold nanoparticles and the temperature sensitivity of the microgel, and has special photosensitivity.

Description

technical field [0001] The invention belongs to the field of preparation of hybrid microgel materials containing nano-noble metal particles, in particular to a polyvinylpyrrolidone / polyN-vinylcaprolactam hybrid microgel containing nano-gold and a preparation method thereof, and the obtained hybrid microgel The specific properties exhibited by gel materials. Background technique [0002] Nano-gold refers to extremely fine gold particles with a particle size of 0.5-250nm. At this size, gold particles have special photothermal properties and catalytic properties that macroscopic gold does not have, and are compatible with environmentally sensitive microgels. After hybridization adsorption, the obtained product can have environmental sensitivity and catalytic performance at the same time, and can adjust various properties of nano-gold particles by adjusting the external environmental parameters where the microgel is located. [0003] Usually gold-loaded hybrid microgel material...

Claims

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Application Information

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IPC IPC(8): C08F226/10C08F226/06C08F222/14C08F222/38C08K3/08B22F9/24B22F1/0545B82Y40/00B82Y30/00
CPCC08F226/10C08F226/06C08K3/08B22F9/24B82Y40/00B82Y30/00C08K2003/0831C08K2201/011C08K2201/005C08F222/102C08F222/385
Inventor 王杨松付琬璐于帅刘春和孙洪涛许仙鹤李佳锡
Owner 沈阳先进涂层材料产业技术研究院有限公司
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