Composite nano epoxy functional polymer/SiO2 particle and its prepn process

An epoxy-functional and epoxy-functional technology, applied in the field of epoxy-functional polymer/SiO2 composite nanoparticles and its preparation, can solve difficult surface functionalization, low grafting rate and grafting efficiency, coating layer Eliminate problems such as shedding, and achieve the effects of simple operation, high chemical reactivity, and enhanced interface compatibility

Inactive Publication Date: 2004-01-21
TSINGHUA UNIV
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  • Application Information

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Problems solved by technology

[0004] The purpose and task of the present invention is to provide a kind of epoxy functional polymer / SiO 2 Composite nanoparticles and preparation method thereof, the method is by adding common polymer / SiO 2 The introduction of epoxy functional groups on the surface of composite nanoparticles enables them to have the ability to chemically react with the matrix, thereby maximizing the interfacial compatibility between the composite particles and the matrix, and finally showing various good properties in practical applications. It can not only solve the problem that the coating layer of coated nanoparticles in the past is easy to fall off, but also solve the problems of low grafting rate and grafting efficiency in the preparation of grafted nanoparticles and the difficulty in realizing the surface functional problem

Method used

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  • Composite nano epoxy functional polymer/SiO2 particle and its prepn process
  • Composite nano epoxy functional polymer/SiO2 particle and its prepn process
  • Composite nano epoxy functional polymer/SiO2 particle and its prepn process

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Embodiment 1

[0036] Embodiment 1: Zhoushan Tomorrow Company produces the average particle diameter of 10 ± 5nm, and the specific surface area is 640m 2 / g nano-SiO 2 After treating with 5wt% KH-570 silane type coupling agent produced by Nanjing Shuguang Chemical Factory, weigh 4 parts and add it to 100 parts of styrene monomer, stir and ultrasonically disperse evenly. Add 370 parts of deionized water, 6 parts of sodium dodecylsulfonate and 0.75 parts of nonylphenol polyoxyethylene ether into a four-necked bottle equipped with mechanical stirring, reflux condenser, nitrogen protection and thermometer, and heat up to 40 °C After stirring and dissolving, add monomer and SiO at 50°C 2 mixture. Then, add 70% of the initiator aqueous solution made up of 0.5 parts of ammonium persulfate and 75 parts of deionized water, raise the temperature to 82°C and react for 1 hour, then add methacrylic acid shrinkage dropwise at a rate of 1 drop per 5 seconds. Glyceride (GMA) 10 parts. After the dropwise...

Embodiment 2

[0037] Embodiment 2: SiO 2 The addition amount of GMA is reduced to 0.5 part by 4 parts, and the consumption of KH-570 is 1wt%, and GMA addition amount is changed into 0.01 part simultaneously, all the other formulas are identical with example 1. Monomer and SiO 2 The mixture was added to the system at 50°C, the reaction was carried out at 70°C for 2 hours, and then GMA was added dropwise. The yield, grafting rate and grafting efficiency of the obtained product are 94.7%, 19622% and 98.1% respectively, and the particle size distribution is 60-70nm.

Embodiment 3

[0038] Embodiment 3: SiO 2 The addition amount of the compound increases to 30 parts by 4 parts, and the consumption of KH-570 is 10wt%, and all the other formulas are identical with example 1. The reaction was carried out for 2 hours after the completion of the GMA dropwise addition. The yield, grafting rate and grafting efficiency of the obtained product are 92.1%, 329% and 89.6% respectively, and the particle size distribution is 60-70nm.

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Abstract

The present invention prepares composite nano epoxy functional polymer / SiO2 particle with the materials including inorganic nano SiO2 particle, organic olefine monomer, olefine monomer with epoxy radical second crosslinking agent and through emulsion polymerization or suspension polymerization in water medium in the presence of emulsifier and initiator. The composite particle has the characterized structure comprising inorganic nano SiO2 particle as core, organic polyolefin as shell and epoxy functional radical on the surface; and has particle size smaller than 100 nm, chemical bond connection between the core and the shell and epoxy functional radical with very high chemical reaction activity. The present invention has wide application in developing nano technology.

Description

technical field [0001] Epoxy functional polymer / SiO related to the present invention 2 Composite nanoparticles and a preparation method thereof belong to the technical field of polymer materials. Background technique [0002] The development and preparation of polymer-based inorganic nanocomposites by using inorganic nanoparticles is a hot field in the research of new polymer materials. The method of preparing polymer / inorganic composite nanoparticles is not only able to maintain the nanometer size of the particles, but also has the characteristics of both inorganic nanoparticles and organic polymers, and can be adjusted in particle structure and particle size. , particle surface physical and chemical properties and other aspects have a very high degree of design freedom, so it has always been valued by people. [0003] In the preparation of polymer / inorganic composite nanoparticles, the inventors have prepared olefin polymer / SiO 2 Composite nanoparticles (patent applicat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/44C08F24/00C08K3/36
Inventor 于建曾重郭朝霞
Owner TSINGHUA UNIV
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