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Surface carboxyl functionalized polystyrene / nano silicon dioxide hybridization material and preparation thereof

A nano-silica, carboxyl functionalization technology, applied in the field of polymer materials

Inactive Publication Date: 2009-07-15
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the shortcomings of the ATRP system itself, there are still certain limitations in the synthesis of functional monomers containing amide and carboxyl groups, and the application of click chemistry to introduce special functional groups has better results.

Method used

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  • Surface carboxyl functionalized polystyrene / nano silicon dioxide hybridization material and preparation thereof
  • Surface carboxyl functionalized polystyrene / nano silicon dioxide hybridization material and preparation thereof
  • Surface carboxyl functionalized polystyrene / nano silicon dioxide hybridization material and preparation thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0056] (1) Terminal azido polystyrene / nano silica particles

[0057] Add 5g of nano-silica particles to a 50ml round bottom flask, dry 30ml of toluene, ultrasonically disperse for 30min, add 40mmol of aminopropyltriethoxysilane coupling agent, and heat to reflux for 10h. After the reaction is completed, it is centrifuged at 4800 rpm, washed with chloroform several times, and then washed several times with ethanol. Nanoparticles were dried in vacuum at 40℃ for 24h, and they were recorded as surface ammoniated silica particles (SiO 2 -NH 2 ). The above 1g SiO 2 -NH 2 The particles were dispersed in 30ml of anhydrous acetonitrile, stirred in an ice bath for 2h and then added dropwise 2mmol of triethylamine, continued stirring in the ice bath for 40 minutes and then added dropwise 2mmol of α-bromoisobutyl bromide, stirred in the ice bath for 6h and then reacted at room temperature Stir the reaction for 24 hours to complete the reaction, filter, and wash the product with saturated NaCl...

Embodiment 2

[0063] (1) Terminal azido polystyrene / nano silica particles

[0064] In a 50ml round-bottomed flask, add 5g of nano-silica particles, 30ml of absolute ethanol, ultrasonic dispersion for 30min, add 40mmol of aminopropyltrimethoxysilane coupling agent, and heat to reflux for 12h. After the reaction is completed, it is centrifuged at 4800 rpm, washed with chloroform several times, and then washed several times with ethanol. Nanoparticles were dried in vacuum at 40℃ for 24h, and they were recorded as surface ammoniated silica particles (SiO 2 -NH 2 ). The above 2g SiO 2 -NH 2 The particles were dispersed in 30-50ml chloroform, 4mmol of triethylamine was added dropwise after stirring for 4h in an ice bath, 4mmol of α-bromoisobutyl bromide was added dropwise after stirring for 60min in the ice bath, and the reaction was stirred in an ice bath for 8h before normal temperature Stir the reaction for 30 hours to complete the reaction, filter, and wash the product with saturated NaCl solutio...

Embodiment 3

[0070] (1) Terminal azido polystyrene / nano silica particles

[0071] In a 50ml round bottom flask, 5g of nano-silica particles were added, 30ml of dried toluene, ultrasonic dispersion for 30min, 40mmol of aminopropyltriethoxysilane coupling agent was added, and the mixture was heated to reflux for 9h. After the reaction is completed, it is centrifuged at 4800 rpm, washed with chloroform several times, and then washed several times with ethanol. Nanoparticles were dried in vacuum at 40℃ for 24h, and they were recorded as surface ammoniated silica particles (SiO 2 -NH 2 ). The above 1.5g SiO 2 -NH 2 The particles were dispersed in 45ml of anhydrous acetonitrile, stirred in an ice bath for 3h and then added 3mmol of triethylamine, continued stirring in the ice bath for 40min, and then added dropwise 3mmol of α-bromoisobutyl acyl bromide, stirred in an ice bath for 6h and then reacted at room temperature Stir the reaction for 24 hours to complete the reaction, filter, and wash the pro...

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Abstract

The invention discloses a method for preparing surface carboxylic group functional polystyrene / nano-silicon dioxide hybrid material by effectively combining click chemistry and ATRP; in the method, a silane coupling agent is adopted for linking an ATRP evocating agent to a SiO2 particle surface, and polystyrene (PSt) is grafted on the SiO2 particle surface by adopting the ATRP; then, carboxyl is led into a nano-silicon dioxide particle surface modified by the polystyrene by means of the click reaction, thus obtaining the surface carboxylic group functional polystyrene / nano-silicon dioxide hybrid material. After the infrared, nuclear magnetism and thermogravimetry mapping analysis, the surface carboxylic group functional polystyrene / nano-silicon dioxide hybrid material prepared by the invention has good thermal stability and dispersivity; in addition, as the carboxyl has wide reaction range and the characteristic of easy ionization, nano-particles has high reactive behavior so as to be widely applied to the fields such as high polymer material modifying agents, water treatment agents, catalysts, sensing agents and protein carriers.

Description

Technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a surface carboxyl functionalized polystyrene / nano-silica hybrid material and its preparation, in particular to an effective combination of click chemistry and atom transfer radical polymerization (ATRP) Method for functionalizing polystyrene / nano-silica hybrid materials with surface carboxyl groups. Background technique [0002] The properties of the material surface are an important part of the material properties, such as wetting, adsorption, etc. are related to the properties of the material surface. With the development of science and technology and the deepening of research in related fields, new requirements have been put forward for the design and preparation of new materials with special surface properties. Nanomaterials are an important research direction of materials science, and their applications involve many fields. In its application process, on the one hand, it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00C08F8/00
Inventor 王云普陈久存卢全颜小东李宏军魏铄蕴
Owner NORTHWEST NORMAL UNIVERSITY
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