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Shear thickening fluid microcapsule, reinforced high molecular material and preparation method and application of shear thickening fluid microcapsule and reinforced high molecular material

A polymer material and microcapsule technology, applied in the field of shear thickening fluid microcapsules, can solve the problems of poor processing fluidity and poor impact resistance, and achieve improved processing fluidity, good processing fluidity, excellent The effect of impact performance

Inactive Publication Date: 2014-10-01
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention is to overcome the defects of poor impact resistance and poor processing fluidity of polymer materials in the prior art, and provide a shear thickening fluid microcapsule, toughened polymer material and its preparation method and application

Method used

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  • Shear thickening fluid microcapsule, reinforced high molecular material and preparation method and application of shear thickening fluid microcapsule and reinforced high molecular material
  • Shear thickening fluid microcapsule, reinforced high molecular material and preparation method and application of shear thickening fluid microcapsule and reinforced high molecular material
  • Shear thickening fluid microcapsule, reinforced high molecular material and preparation method and application of shear thickening fluid microcapsule and reinforced high molecular material

Examples

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Effect test

Embodiment 1

[0046] A preparation method for shear thickening fluid microcapsules, comprising the steps of:

[0047] (1) In 190g of polyethylene glycol with a number average molecular weight of 400, add 10g of nano-silicon dioxide while stirring at a speed of 3000rpm with a high-speed shear emulsifier, shear emulsification for 30min, and ultrasonically defoam for 30min to obtain shear cut thickened fluid;

[0048] (2) 3g emulsifier (Span80 and Tween80 compounding, weight ratio is 3: 1) and 77g n-octane are mixed, under the 9000rpm rotating speed of high-speed shear emulsifier, add the shear that 20g step (1) makes Thicken the fluid, mix and stir for 15 to 20 minutes to obtain an emulsion;

[0049] (3) At 80°C and a stirring speed of 800rpm, add 32ml of cyclohexane dissolved with 6g of toluene diisocyanate into 67g of emulsion, react at 80°C for 90min, filter the reaction product with suction, and wash with ethanol Three times, and then dried in a vacuum oven at 80°C for 4 hours to obtain...

Embodiment 2

[0051] A preparation method for shear thickening fluid microcapsules, comprising the steps of:

[0052] (1) In 160g of polyethylene glycol with a number average molecular weight of 600, add 40g of nano-silica while stirring at a speed of 3000rpm with a high-speed shear emulsifier, emulsify by shearing for 30min, and ultrasonically defoam for 60min to obtain shear cut thickened fluid;

[0053] (2) 3g emulsifier (Span80 and Tween80 compounding, weight ratio is 2: 1) and 77g n-octane are mixed, under the 9000rpm rotating speed of high-speed shear emulsifier, add the shear that 20g step (1) makes Thicken the fluid, mix and stir for 15 to 20 minutes to obtain an emulsion;

[0054] (3) At 80°C and a stirring speed of 800rpm, add 32ml of cyclohexane dissolved with 6g of diphenylmethane diisocyanate into 70g of the emulsion, react at 80°C for 90min, and filter the reaction product with suction. Wash it three times with ethanol, and then dry it in a vacuum oven at 80°C for 4 hours to...

Embodiment 3

[0056] A preparation method for shear thickening fluid microcapsules, comprising the steps of:

[0057] (1) In 190g of polyethylene glycol with a number average molecular weight of 400, add 10g of nano silicon dioxide while stirring at a speed of 3000rpm with a high-speed shear emulsifier, emulsify by shearing for 30min, and ultrasonically defoam for 40min to obtain shear cut thickened fluid;

[0058] (2) 3g emulsifier (Span80 and Tween80 compound, weight ratio is 5: 1) and 77g n-octane are mixed, under the 9000rpm rotating speed of high-speed shear emulsifier, add the shear that 20g step (1) makes Thicken the fluid, mix and stir for 15 to 20 minutes to obtain an emulsion;

[0059] (3) At 80°C and a stirring speed of 800rpm, add 32ml of cyclohexane dissolved with 6g of toluene diisocyanate into 67g of emulsion, react at 80°C for 90min, filter the reaction product with suction, and wash with ethanol Three times, and then dried in a vacuum oven at 80°C for 4 hours to obtain. ...

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Abstract

The invention discloses a shear thickening fluid microcapsule, a reinforced high molecular material and a preparation method and an application of the shear thickening fluid microcapsule and the reinforced high molecular material. The preparation method of the shear thickening fluid microcapsule comprises the following steps: (1) mixing and stirring 20 parts of a shear thickening fluid, 75-79 parts of an organic solvent A and 1-5 parts of an emulsifier to obtain an emulsion, wherein the shear thickening fluid comprises a dispersion phase medium and dispersion phase particles in a weight ratio of (19 to1)-(4 to 1); and the emulsifier comprises Span 80 and Tween 80; and (2) mixing the emulsion with an organic solvent B containing isocyanate, wherein the weight ratio of the emulsion, isocyanate and the organic solvent B is (67-70) to (5-8) to 25; and reacting, filtering, washing and drying to obtain the shear thickening fluid microcapsule. The shear thickening fluid microcapsule can reinforce the high molecular material and improve the impact performance of the high molecular material, and meanwhile, the viscosity of the melt is not improved and the processing flowability of the high molecular weight can be improved.

Description

technical field [0001] The invention relates to a shear thickening fluid microcapsule, a toughening polymer material, a preparation method and application thereof. Background technique [0002] Shear Thickening Fluid (STF for short) is a kind of non-Newtonian fluid. The viscosity of the fluid is closely related to the shear rate. When the shear rate exceeds a certain critical value, its viscosity can increase sharply, which is called shear thickening. Shear thickening fluid is a new type of functional material composed of dispersed phase particles and dispersion medium. The dispersed phase particles can be naturally occurring minerals, or chemically synthesized polymers, such as silicon dioxide and other oxides, calcium carbonate, polystyrene, polymethyl methacrylate, etc. The shape of the particles includes spheres, ellipsoids, disk-shaped particles, etc. These particles can be stably dispersed in the solution through charge interaction, Brownian motion, absorption of sur...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/73C08G18/48C08K3/36C08L67/04C08L75/08
CPCC08G18/3206C08G18/4833C08G18/73C08G18/7614C08G18/7671C08K3/36C08K2201/011C08L67/04C08L75/08
Inventor 潘泳康雷凯唐颂超夏季孟利良王钰涛季加进张珊胡文秀
Owner EAST CHINA UNIV OF SCI & TECH
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