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Preparation method and application of polystyrene hollow microspheres

A polystyrene and styrene technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of no industrialized products, small particle size of hollow microspheres, environmental and human health damage, etc. Formation and maintenance, reduction of monomer usage, good safety and environmental protection

Active Publication Date: 2013-11-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the 21st century, researchers at home and abroad have conducted a lot of research and reports on polymer hollow microspheres, but overall, polymer hollow microspheres still have cumbersome preparation processes, difficulty in controlling the particle size of the spheres, and the thickness of the hollow spherical shell. It is difficult to effectively and accurately control the phase composition and other problems. At present, most of them are limited to the laboratory research stage, and there are no mature industrial products.
The oil phase composed of monomers does not require the use of organic solvents during the reaction, but because of the low viscosity of the monomers, it is easy to break the emulsification when forming the W1 / O phase, and the formed hollow microspheres are small in size; dissolved by polystyrene There are two main problems in forming the O phase in an organic solvent: (1) Due to the need to use an organic solvent during use, it is harmful to the environment and human health; (2) The viscosity of the oil phase is proportional to the concentration of polystyrene, so in When preparing the oil phase, the concentration of polystyrene should not be too high (generally no more than 15%), otherwise it will not be able to effectively disperse because the viscosity of the O phase is too high, so the single-pot output is low

Method used

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  • Preparation method and application of polystyrene hollow microspheres
  • Preparation method and application of polystyrene hollow microspheres

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Wash the computer packaging with polystyrene foam and dry it for later use;

[0040] 1) Prepare the oil phase: weigh 7.38g of the above-mentioned clean polystyrene foam, add 24.6g of styrene monomer and 0.738g of benzoyl peroxide, add 0.615g of ethylene glycol dimethacrylate, and 603.198g of Span , after mixing uniformly, the oil phase is obtained; wherein the weight of polystyrene is 30% of the weight of styrene monomer, and the initiator is 3.0% of the weight of styrene monomer; the weight of crosslinking agent is 2.5% of the weight of styrene monomer, emulsified The agent weight is 10% of the sum of polystyrene weight and styrene monomer weight, and the total mass of O phase is 36.531g;

[0041] 2) Configure the W1 phase: take 7.0 g of distilled water, add 0.035 g of sodium dodecylbenzene sulfonate, dissolve evenly and use it as the W1 phase, the weight of the emulsifier is 0.5% of the weight of the distilled water, and the total mass of the W1 phase is 7.035 g;

[...

Embodiment 2

[0047] Wash the computer packaging with polystyrene foam and dry it for later use;

[0048] 1) Prepare the oil phase: Weigh 0.63g of the above-mentioned clean polystyrene foam, add 31.5g of styrene monomer, 0.0063g of benzoyl peroxide, and 800.65g of Span, and mix evenly to prepare the oil phase. Polystyrene is 2% by weight of styrene, initiator is 0.02% by weight of styrene monomer, cross-linking agent is 0% by weight of styrene monomer, Span 80 is polystyrene and styrene monomer by weight 2% of the sum of the weights, the total mass of the oil phase is 32.78g;

[0049] 2) Configure the W1 phase: take 18.0 g of distilled water, add 1.44 g of sodium dodecyl sulfonate, dissolve evenly and use it as the W1 phase, the weight of the emulsifier is 8% of the weight of the distilled water, and the total mass of the W1 phase is 19.44 g;

[0050] 3) Configure W2 phase: add 0.156g gelatin, 0.11g sodium dodecylbenzenesulfonate and 0.02g sorbitan oleate into 130ml distilled water, stir w...

Embodiment 3

[0055] Wash the computer packaging with polystyrene foam and dry it for later use;

[0056] 1) Prepare the oil phase: weigh 4g of the above-mentioned clean polystyrene foam, add 100g of styrene monomer and 0.5g of benzoyl peroxide, add 3g of ethylene glycol dimethacrylate, 605.2g of Span, mix Obtain oil phase after being even; Wherein polystyrene weight 4% of styrene monomer weight, initiator is 0.5% of styrene monomer weight; Cross-linking agent weight is 3% of styrene monomer weight, emulsifier weight It is 5% of the sum of polystyrene weight and styrene monomer weight, and the sum of O phase mass is 112.7g;

[0057] 2) Configure the W1 phase: take 43g of distilled water, add 1.15g of sodium lauryl sulfate, 1.0g of OP-10, dissolve evenly and use it as the W1 phase, the weight of the emulsifier is 5% of the weight of the distilled water, and the total mass of the W1 phase is 45.15g;

[0058] 3) Configure W2 phase: add 32.1g of polyvinyl alcohol to 1070ml of distilled water, ...

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Abstract

The invention relates to a preparation method and an application of polystyrene hollow microspheres. According to the invention, polystyrene is dissolved into styrene monomer, such that an oil phase is prepared. The viscosity of the oil phase is controlled by controlling the concentration of polystyrene. In a W1 / O / W2 triple emulsion, initiation and polymerization of the styrene monomer, precipitation hardening of polystyrene, and the like are realized, such that the polystyrene hollow microspheres with the hollow structure are formed. The invention also relates to an application of the polystyrene hollow microspheres in drilling fluids and cementing fluids.

Description

technical field [0001] The invention relates to a polystyrene hollow microsphere, a preparation method and application thereof. More specifically, the present invention relates to the preparation of polystyrene hollow microspheres by encapsulation and their application in the drilling industry. Background technique [0002] Hollow microsphere materials have unique chemical and physical properties due to their special hollow structure. In recent years, they have attracted more and more attention and become a research hotspot in the field of materials. So far, inorganic materials, polymer materials, metal oxide materials and semiconductor materials (gallium oxide, gallium nitride), etc. have been tried to be prepared into hollow microsphere materials by domestic and foreign researchers, and these materials show the same appearance as the corresponding solid Special features of different materials. These hollow microsphere materials with special characteristics are expected t...

Claims

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Application Information

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IPC IPC(8): C08F112/08C08F2/26C08F2/30C08L25/06C09K8/035
Inventor 赵素丽陈铖常连玉林永学刘金华石秉忠
Owner CHINA PETROLEUM & CHEM CORP
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