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Preparation method for novel PS-co-PVEA@SiO2

A technology of nano-silica and amino polymers, applied in the field of nano-materials, can solve the problems of complex synthetic process of amino-modified composite microspheres, low grafting rate of mercapto-modified composite microspheres, and insignificant adsorption effect, etc., to achieve Excellent stability, good dispersibility, and multiple action sites

Inactive Publication Date: 2013-12-04
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the grafting rate of thiol-modified composite microspheres is low, and the corresponding adsorption effect is not obvious.
The synthesis process of amino-modified composite microspheres is relatively complicated, firstly, the modification of nano-silica, secondly, GMA is further grafted on the surface of nano-silica, and finally, the ammoniation reaction is carried out. The process is complicated and there are many influencing factors.

Method used

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  • Preparation method for novel PS-co-PVEA@SiO2
  • Preparation method for novel PS-co-PVEA@SiO2
  • Preparation method for novel PS-co-PVEA@SiO2

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] First, ultrasonically disperse the double-bond-modified nano-silica (MPS-SiO 2 ) alcohol solution for 20 min, take 20 ml (0.4 g) into a 50 ml three-necked flask, then add 1 g of styrene, 1 g of 4-vinylphenyl N, N-diethylamine monomer, divinyl 40 mg of benzene, 60 mg of azobisisobutyronitrile, ultrasonically dispersed for 5 min. Nitrogen and oxygen discharge were repeated 5 times, the system was sealed, and placed in a water bath at 70 °C for 20 h. At the end of the reaction, the final product was repeatedly centrifuged, ultrasonically dispersed and washed, and vacuum-dried at 40 °C.

Embodiment 2

[0019] First, ultrasonically disperse the double-bond-modified nano-silica (MPS-SiO 2 ) alcohol solution for 20 min, take 20 ml (0.4 g) into a 50 ml three-necked flask, then add 1 g of styrene, 1 g of 4-vinylphenyl N, N-diethylamine monomer, and 40 g of divinylbenzene mg, polyvinylpyrrolidone 0.2 g, azobisisobutylcyanide 60 mg, ultrasonically dispersed for 5 min. Nitrogen and oxygen discharge were repeated 5 times, the system was sealed, and placed in a water bath at 70 °C for 20 h. At the end of the reaction, the final product was repeatedly centrifuged, ultrasonically dispersed and washed, and vacuum-dried at 40 °C.

Embodiment 3

[0021] First, ultrasonically disperse the double-bond-modified nano-silica (MPS-SiO 2 ) alcohol solution for 20 min, take 20 ml (0.4 g) and place it in a 50 ml three-necked flask, then add 1 g of styrene, 1 g of 4-vinylphenyl N, N-diethylamine monomer, and divinyl Benzene 20 mg, polyvinylpyrrolidone 0.2 g, azobisisobutyrocyanide 60 mg, ultrasonically dispersed for 5 min. Nitrogen and oxygen discharge were repeated 5 times, the system was sealed, and placed in a water bath at 70 °C for 20 h. At the end of the reaction, the final product was repeatedly centrifuged, ultrasonically dispersed and washed, and vacuum-dried at 40 °C.

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Abstract

The invention discloses a preparation method for PS-co-PVEA@SiO2, which is mainly characterized in that phenethylene, tetraphenylethylene-N, N-ethylethanamine (VEA), and divinyl benzene are used as raw materials, and MPS-SiO2 is used as seed to prepare PS-co-PVEA@SiO2 composite microsphere through the dispersion polymerization reaction principle. According to the invention, the average particle diameter of the PS-co-PVEA@SiO2 composite microsphere is 180 nm; the chelation function of a polymer layer and the advantage of mechanical stability of the silicon dioxide particle are combined; heavy metal can be efficiently absorbed, and recycling is adopted. The technical preparation process is relatively simple, and is without post-modified treating process. The manufactured PS-co-PVEA@SiO2 composite microsphere has uniform particle diameter, lager specific surface area, and can be widely used in the fields of electron, textiles, medical treatment and health, food, paint, plastic and the like.

Description

technical field [0001] The present invention relates to a novel amino polymer graft modified nano silicon dioxide (PS- co -PVEASiO 2 ) preparation method, belonging to the field of nanometer materials and technologies. Background technique [0002] In today's world, with the rapid development of social economy, the accompanying heavy metal pollution is becoming more and more serious. Among the heavy metal pollution, water pollution is the top priority. Water is an indispensable substance in people's daily life, providing a way for heavy metal ions to enter the human body. In major heavy metal pollution incidents in the world, the transmission medium is basically water. For example, Minamata disease occurred in Japan in 1953. In the method of removing heavy metals, the adsorption method is gradually favored by researchers, but the existing heavy metal adsorbents are easy to synthesize, and the synthesis process is easy to cause secondary pollution. It is difficult to reu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00
Inventor 汤建新孙静静戴佰林
Owner HUNAN UNIV OF TECH
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