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Method for preparing polystyrene hollow microspheres with high degree of sphericity

A technology of polystyrene and hollow microspheres, which is applied in the field of polymer processing and molding, can solve the problems of low yield of hollow microspheres, achieve the effects of increasing preparation costs, simple process, and increasing yield

Active Publication Date: 2014-11-19
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in the present invention is to provide a method for preparing high-sphericity polystyrene-like hollow microspheres for the problem of low yield of high-sphericity polystyrene-like hollow microspheres

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Polystyrene, hexane, and benzene were configured as an oil phase at a mass fraction of 4.0: 0.1: 95.9; polyvinyl alcohol, anhydrous calcium chloride, and water were configured as an external aqueous phase at a mass fraction of 1.0: 0.5: 98.5; three microinjections were used The pump injects the distilled water, the oil phase and the outer water phase into the inner water phase, the oil phase and the outer water phase pipeline of the coaxial emulsion generator respectively to prepare the composite emulsion particles coated with distilled water by the oil phase; the composite emulsion particles are collected in a In the rotary bottle of the outer water phase, put it into a rotary evaporator and heat it in a water bath to solidify at a temperature of 25 o C~60 o C, the rotation rate is 25 rpm~55 rpm, the curing time is 48 h~96 h; the cured microspheres are washed with distilled water and placed in an oven for 45 h o C is dried to obtain hollow microspheres with high spher...

Embodiment 2

[0025] Polystyrene, hexadecane and fluorobenzene are configured as an oil phase at a mass fraction of 8.0: 0.4: 89.4; polyvinyl alcohol, anhydrous calcium chloride and water are configured as an external water phase at a mass fraction of 1.5: 1.0: 97.5; three The micro-injection pump injects distilled water, oil phase and external water phase into the inner water phase, oil phase and outer water phase pipelines of the coaxial emulsion generator respectively to prepare composite emulsion particles coated with distilled water in the oil phase; the composite emulsion particles are collected in In the rotary bottle with the external water phase, put it into the rotary evaporator to heat and solidify in a water bath at a temperature of 25 o C~60 o C, the rotation rate is 25 rpm~55 rpm, the curing time is 48 h~96 h; the cured microspheres are washed with distilled water and placed in an oven for 45 h o C is dried to obtain hollow microspheres with high sphericity. The geometric si...

Embodiment 3

[0027] Polystyrene, low-molecular-weight polybutadiene and 1,2-dichloroethane are prepared as an oil phase at a mass fraction of 25.0: 1.0: 74.0; polyvinyl alcohol, anhydrous calcium chloride and water are prepared at a mass fraction of 4.0: 3.0: 93.0 Fractional configuration of the outer water phase; using three micro-injection pumps to inject distilled water, oil phase and outer water phase into the inner water phase, oil phase and outer water phase pipelines of the coaxial emulsion generator respectively, to prepare the composite oil phase coated distilled water Emulsion: collect the composite emulsion in a rotary bottle equipped with an external water phase, put it into a rotary evaporator, heat and solidify it in a water bath, and the temperature is 25 o C~60 o C, the rotation rate is 25 rpm~55 rpm, the curing time is 48 h~96 h; the cured microspheres are washed with distilled water and placed in an oven for 45 h o C is dried to obtain hollow microspheres with high spher...

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Abstract

The invention provides a method for preparing olystyrene hollow microspheres with high degree of sphericity. The method comprises the following steps of a, dissolving a polystyrene polymer and an additive in an organic solvent to obtain an oil phase; b, dissolving polyvinyl alcohol and anhydrous calcium chloride in distilled water to obtain an outer water phase; c, respectively injecting distilled water, the oil phase and the outer water phase into an inner water phase pipeline, an oil phase pipeline and an outer water phase pipeline in an axial emulsifiable granule generator by virtue of an injection pump and reacting to obtain distilled-water-in-oil-phase compound emulsifiable granules; d, collecting the compound emulsifiable granules in a rotary bottle in which the outer water phase is contained, placing in a rotary evaporator, heating in a water bath for curing; and e, cleaning the cured microspheres with distilled water, drying the microspheres in a drying oven to obtain the hollow microspheres with high degree of sphericity. The method disclosed by the invention is suitable for X-ray-driven symmetry research, laser inertial confinement fusion physical experiments and high-energy physical experiments.

Description

technical field [0001] The invention relates to a method for preparing high-sphericity polystyrene hollow microspheres, belonging to the field of polymer processing and molding. In this paper, sphericity is an index to measure the degree of sphericity of an object, and its value is the ratio of the difference between the maximum diameter and the minimum diameter to the average diameter. High sphericity means that the sphericity is better than 99.9%. High-sphericity polystyrene-like hollow microspheres can be used in X-ray-driven symmetry studies, inertial confinement fusion (ICF) and high-energy physics experiments, etc. Background technique [0002] With the increasing shortage of global energy and the increasing demand for energy, the experimental research of ICF, one of the most promising ways to realize controllable nuclear fusion, has attracted the attention of advanced countries such as the United States. In ICF physical experiments, polymer hollow microspheres can be...

Claims

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Application Information

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IPC IPC(8): C08J9/28C08L25/06C08L25/16C08L53/02
Inventor 刘梅芳陈素芬张占文李波刘一杨李靖苏琳李洁史瑞廷初巧妹黄勇冯建鸿
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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