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Hybrid Janus nano-particles obtained through polymer grafting modification as well as preparation method and application thereof

A nanoparticle and polymer technology, which is applied in the field of rubber and plastic fillers, can solve the problems of difficult dispersion and a large number of aggregation during processing.

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

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 a large amount of aggregation during processing while improving the mechanical properties.

Method used

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  • Hybrid Janus nano-particles obtained through polymer grafting modification as well as preparation method and application thereof
  • Hybrid Janus nano-particles obtained through polymer grafting modification as well as preparation method and application thereof
  • Hybrid Janus nano-particles obtained through polymer grafting modification as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 100mL cyclohexane, 50mL isoprene, 0.4mL 2.7mol / L n-butyllithium to a 250mL sealed and strictly dried round-bottomed flask. The magnetron rotates at 500rpm and reacts at 25℃ for 1h. Vacuum the residue. Monomers and solvents. Disperse 0.2g of dried Janus nanoparticles into 100mL of cyclohexane, add 1mL of tetrahydrofuran, and directly add to the above polymerization system, adjust the speed to 700rpm, keep the temperature at 35℃, add 3mL of methanol after 15h, centrifuge and then ultrasonically disperse In toluene, soak in a high-speed centrifuge for 3 hours to separate, repeat more than 10 times to ensure that there is no residual free polymer, and centrifuge to obtain figure 1 The filler described.

Embodiment 2

[0033] Add 100mL cyclohexane, 35mL butadiene, 0.4mL 2.7mol / L n-butyllithium to a 250mL sealed and strictly dry round bottom flask. The magnetron rotates at 500rpm and reacts at 25℃ for 1h. Use a vacuum pump to clean the remaining monomer. Body and solvent. Disperse 0.2g of dried Janus nanoparticles into 100mL of cyclohexane, add 1mL of tetrahydrofuran, and directly add to the above polymerization system, adjust the speed to 700rpm, keep the temperature at 35℃, add 3mL of methanol after 15h, centrifuge and then ultrasonically disperse In toluene, soak in a high-speed centrifuge for 3 hours to separate, repeat more than 10 times to ensure that there is no residual free polymer, and centrifuge to obtain figure 1 The filler described.

Embodiment 3

[0035] Add 100mL cyclohexane, 50mL butadiene, 9mL distilled styrene, 0.5mL 2.7mol / L 4-cyclohexane isobutyl lithium into a 250mL sealed and strictly dry round bottom flask, the magnetron rotation speed is 500rpm, 25 React at ℃ for 1 hour, use a vacuum pump to remove residual monomers and solvents, disperse 0.2g of dried Janus nanoparticles into 100mL of cyclohexane, add 1mL of tetrahydrofuran, and directly add to the above polymerization system, adjust the speed to 700rpm, and keep the temperature Add 3mL methanol after 15h at 35℃, centrifuge and then ultrasonically disperse in toluene, soak in a high-speed centrifuge for 3h, repeat more than 10 times to ensure that there is no residual free polymer. figure 1 The filler described.

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Abstract

The invention belongs to the field of rubber and plastic filler and particularly relates to polystyrene / silicon dioxide organic-inorganic hybrid Janus nano-particles grafted with polymers on the surface by utilizing a plurality of chemical reactions as well as a preparation method and an application thereof. According to the preparation method of the hybrid Janus nano-particles obtained through polymer grafting modification, the single spherical surface or dual spherical surfaces of the Janus nano-particles comprising polystyrene spheres and silicon dioxide spheres which are connected through chemical bonds are grafted with the polymers, wherein the dual spherical surfaces are grafted with the same or different polymers; after a rubber material is filled with the polystyrene / silicon dioxide organic-inorganic hybrid Janus nano-particles grafted with polymers, the dispersity is good, the stress at definite elongation and the general storage modulus of the rubber material are increased, the abrasive resistance, tearing resistance, strength and elongation at break are all obviously improved. Especially for different rubber blended systems, the Janus nano-particles grafted with different rubber molecules can remarkably improve the mixing effect of different rubbers, so that the general property of multi-element rubber can be given a full play.

Description

Technical field [0001] The invention belongs to the field of rubber and plastic fillers, and in particular relates to a polystyrene / silica organic-inorganic hybrid Janus particle surface grafted polymer by utilizing various chemical reactions, and a preparation method and application thereof. Background technique [0002] Now particles of different shapes are used as fillers to fill rubber, especially in the tire industry. Nanoparticles have attracted attention because of their large specific surface area. Filling of fillers into rubber can make the mechanical properties of rubber particularly The tensile strength and wear resistance are greatly improved. At present, a large number of fillers have been used: carbon black, white carbon black, cross-linked polystyrene, etc. These fillers not only improve the mechanical properties, but also produce the problem of being difficult to disperse and agglomerate during processing. How to develop a filler that is not only beneficial to di...

Claims

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Application Information

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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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