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Preparation method for high-toughness material of polypropylene/shear thickening fluid microcapsule

A polypropylene and microcapsule technology, applied in the directions of microcapsule preparation and microsphere preparation, can solve the problems of reducing the rigidity of polypropylene, deterioration of material processing performance and heat resistance, and restricting the use of polypropylene, so as to improve the rigidity, The effect of improving toughness

Inactive Publication Date: 2014-01-15
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of rubber elastomer will significantly reduce the rigidity of polypropylene, and make the processing performance and heat resistance of the material worse, which limits the use of polypropylene

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (a): In 200g of polypropylene glycol solution with a number-average molecular weight of 400, add nano-silica while stirring at a speed of 3000rpm with a high-speed shear emulsifier. The total amount of nano-silica added is 20g. After adding, continue to stir for 30 minutes to obtain a uniform shear thickening fluid for later use;

[0025] (b): Take 42g of the shear thickening fluid in (a), add 18g of water, and stir with a glass rod until it becomes a uniform and transparent liquid;

[0026] (c): Add 5.16g of emulsifier and 120ml of toluene to the above homogeneous solution, and stir at a speed of 10,000rpm for 15min under a high-speed stirrer to prepare a uniform white emulsion; then transfer the emulsion into a 250ml three-necked flask, ℃, under the condition that the stirrer rotates at 600rpm, slowly add 10ml of toluene solution with 2.16gMDI dissolved therein, and keep the reaction for 90min after the addition is complete; Washing with water three times, taking the...

Embodiment 2

[0029] (a): In 200g of polypropylene glycol solution with a number-average molecular weight of 400, add nano-silica while stirring at a speed of 3000rpm with a high-speed shear emulsifier. The total amount of nano-silica added is 20g. After adding, continue to stir for 30 minutes to obtain a uniform shear thickening fluid for later use;

[0030] (b): Take 42g of the shear thickening fluid in (a), add 18g of water, and stir with a glass rod until it becomes a uniform and transparent liquid;

[0031] (c): Add 5.16g of emulsifier and 120ml of xylene to the above homogeneous solution, under a high-speed stirrer, to

[0032] Stir at a speed of 13000rpm for 15min to prepare a uniform white emulsion; then transfer the emulsion into a 250ml three-necked flask, slowly add 10ml of toluene solution with 2.16g of HDI dissolved in it at 80°C and a stirrer with a rotation speed of 400rpm, and wait for complete addition After the completion of the reaction, the reaction was maintained for 9...

Embodiment 3

[0035] (a): In 200g of polypropylene glycol solution with a number-average molecular weight of 600, add nano-silica while stirring with a high-speed shear emulsifier at a speed of 3000rpm. The total amount of nano-silica added is 20g. After adding, continue to stir for 30 minutes to obtain a uniform shear thickening fluid for later use;

[0036] (b): Take 42g of the shear thickening fluid in (a), add 18g of water, and stir with a glass rod until it becomes a uniform and transparent liquid;

[0037] (c): Add 5.16g of emulsifier and 120ml of toluene to the above homogeneous solution, and stir at a speed of 6000rpm for 20min under a high-speed stirrer to prepare a uniform white emulsion; then transfer the emulsion into a 250ml three-necked flask, ℃, the speed of the stirrer is 800rpm, slowly add 10ml of toluene solution with 2.16gMDI dissolved in it, and keep the reaction for 90min after the addition is complete; Washing with water three times, taking the filter cake in the Buch...

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Abstract

The invention relates to a preparation method for a high-toughness material of a polypropylene / shear thickening fluid microcapsule. The method comprises the following steps: firstly, dispersing nano silicon dioxide in polypropylene glycol under a high-speed mixing effect of a high-speed shearing and emulsifying machine to obtain a shear thickening fluid; secondly, uniformly mixing the prepared shear thickening fluid with water according to a certain ratio to obtain a uniform solution; thirdly, adding an emulsifier and an organic solvent into the uniform solution and mixing through a mixer to obtain a uniform water-in-oil emulsion; fourthly, transferring the water-in-oil emulsion into a three-mouth flask and adding isocyanate for reaction to obtain a shear thickening fluid microcapsule; fifthly, carrying out melt blending on polypropylene and the shear thickening fluid microcapsule in one or a combination of more of an open mixer, an internal mixer and an extruder to obtain the high-toughness material of the polypropylene / shear thickening fluid microcapsule. Compared with a general toughening polypropylene material, the rigidity of polypropylene cannot be reduced while the toughness of polypropylene is enhanced, the heat resistance and the processing flowability of polypropylene are improved, and the shear thickening fluid microcapsule is changed into solid powder which is more convenient to form in comparison with liquid.

Description

technical field [0001] The invention relates to a preparation method of a polypropylene / shear thickening fluid microcapsule high-toughness material, in particular to a synthesis method of a shear thickening fluid microcapsule and a molding processing method of the material, and belongs to the technical field of polymer materials. Background technique [0002] Polypropylene (PP for short) is a thermoplastic high polymer obtained by polymerization of propylene monomer. It has excellent impact resistance, chemical resistance, transparency, electrical insulation and processability. Polypropylene is widely used in textiles, home appliances, packaging, automobiles and construction industries, and its consumption is increasing year by year. It is the fastest growing variety of general plastics, and its consumption is second only to high-density polyethylene and PVC. vinyl. Due to the excellent comprehensive performance and low production cost of polypropylene, a current trend is t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02C08L23/12C08L23/14C08L53/00C08K9/10
Inventor 潘泳康孟利良雷凯夏季卜扬帆何帅黄文娴朱瑾王钰涛季加进
Owner EAST CHINA UNIV OF SCI & TECH
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