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Polymer grafting modified silicon dioxide nanosheet as well as preparation method and use thereof

A technology of silica and graft modification, which is applied in the field of rubber and plastic fillers, can solve the problems of not being able to significantly improve the interfacial behavior of polymers, uneven distribution, and difficulty in synergism, so as to improve the blending effect, improve the interfacial behavior, Significantly anisotropic effect

Active Publication Date: 2015-05-13
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These spherical fillers can more or less improve the performance of a single polymer when used, but they cannot significantly improve the interfacial behavior of the polymer during use, especially for the rapidly developing multi-component combined system, which has the disadvantages of uneven distribution and difficulty in synergy cannot be effectively resolved

Method used

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  • Polymer grafting modified silicon dioxide nanosheet as well as preparation method and use thereof
  • Polymer grafting modified silicon dioxide nanosheet as well as preparation method and use thereof
  • Polymer grafting modified silicon dioxide nanosheet as well as preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Add 0.2g of silica nanoflakes, 100mL of anhydrous toluene, and 1mL of methyltrimethoxysilane into a 250mL round-bottomed flask, react at 70°C for 18h, wash twice with toluene, and then wash twice with dry n-hexane to obtain Silanol-terminated silica nanoflakes. Add 0.2g of capped silica nanoflakes, 100mL of dichloromethane, 3mL of bromoacetyl bromide, and 4mL of triethylamine into a 250mL round-bottom flask, react at room temperature for 18h, and wash 5 times with dichloromethane to obtain silanol-capped bromine-grafted silica nanoflakes. Add 100mL cyclohexane, 50mL isoprene, 0.4mL 2.7mol / L n-butyllithium into a 250mL sealed and strictly dried round-bottomed flask, react at 25°C for 1 hour at a magnet speed of 500rpm, and use a vacuum pump to remove the residual monomers and solvents. Disperse 0.2g of dried silica nanoflakes into 100mL of cyclohexane, directly add to the above polymerization system, adjust the rotation speed to 700rpm, keep the temperature at 35°C, ad...

Embodiment 2

[0043] Add 0.2g of silica nanoflakes, 100mL of anhydrous toluene, and 1mL of methyltrimethoxysilane into a 250mL round-bottomed flask, react at 70°C for 18h, wash twice with toluene, and then wash twice with dry n-hexane to obtain Silanol-terminated silica nanoflakes. In a 250mL round-bottomed flask, add 0.2g of capped silica nanoflakes, 100mL of dichloromethane, 3mL of 3-isocyanate propene, and 4mL of triethylamine, react at room temperature for 18h, and wash 5 times with dichloromethane to obtain Silanol-terminated bromine-grafted silica nanoflakes. Add 100mL cyclohexane, 50mL butadiene, 0.4mL 2.7mol / L n-butyllithium into a 250mL sealed and strictly dried round-bottomed flask, and react for 1 hour at 25°C with a magneton rotation speed of 500rpm. bodies and solvents. Disperse 0.2g of dried silica nanoflakes into 100mL of cyclohexane, directly add to the above polymerization system, adjust the rotation speed to 700rpm, keep the temperature at 35°C, add 3mL of methanol after...

Embodiment 3

[0045] Add 0.2g of silica nanoflakes, 100mL of anhydrous toluene, and 1mL of methyltrimethoxysilane into a 250mL round-bottomed flask, react at 70°C for 18h, wash twice with toluene, and then wash twice with dry n-hexane to obtain Silanol-terminated silica nanoflakes. Add 0.2 g of capped silica nanoflakes, 100 mL of dichloromethane, 3 mL of bromoisobutyryl bromide, and 4 mL of triethylamine into a 250 mL round-bottomed flask, react at room temperature for 18 h, and wash 5 times with dichloromethane to obtain Si Hydroxy-terminated bromine-grafted silica nanoflakes. Add 100mL cyclohexane, 50mL styrene, 0.4mL 2.7mol / L n-butyllithium into a 250mL sealed and strictly dried round-bottomed flask, and react at 25°C for 1 hour at a magnet speed of 500rpm, and use a vacuum pump to remove residual monomers and solvents. Disperse 0.2g of dried silica nanoflakes into 100mL of cyclohexane, directly add to the above polymerization system, adjust the rotation speed to 700rpm, keep the tempe...

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Abstract

The invention belongs to the field of rubber and plastics filler, and particularly relates to silicon dioxide nanosheet surface grafting polymer by taking silicon dioxide as a base as well as a preparation method and use thereof. The polymer grafting modified silicon dioxide nanosheet can be single-face grafted or double-face grafted, and the same kind of polymers or different kinds of polymers can grafted on double faces. The sodium dioxide sheet grafted with rubber polymers has more obvious anisotropism compared with granule and other materials, so that alloying effect of rubber or rubber and plastic molecules, and a better basis can be provided for more effectively exerting synergism of different components.

Description

technical field [0001] The invention belongs to the field of rubber and plastic fillers, and in particular relates to a surface-grafted polymer of silicon dioxide nano-flakes based on silicon dioxide by using various chemical reactions, a preparation method and an application thereof. Background technique [0002] Now particles of various shapes are used as fillers to fill rubber, especially in the tire industry, nanoparticles have attracted much attention because of their large specific surface area, fillers can make the mechanical properties of rubber special Is a substantial improvement in tensile strength and abrasion resistance. At present, the fillers that have been widely used include: carbon black, white carbon black, cross-linked polystyrene, etc. These fillers have the problem of being difficult to disperse and agglomerating in large quantities while improving the mechanical properties. How to develop fillers that are beneficial to dispersion and can significantly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/04C08K9/06C08K3/36C09C1/28C09C3/10
Inventor 贺爱华姜秀波
Owner QINGDAO UNIV OF SCI & TECH
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