Hydrophobic low-density high-strength polystyrene microsphere and preparation method thereof

A technology of polystyrene microspheres and hydrophobic type, which is applied in chemical instruments and methods, earthwork drilling and production, wellbore/well parts, etc. It can solve the problems of inapplicability and poor hydrophobicity, and achieve high productivity and long-lasting Hydrophobic properties, the effect of simple process

Active Publication Date: 2021-01-29
CNOOC TIANJIN BRANCH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problems of poor hydrophobicity of polystyrene microspheres in the prior art and unsuitability in acid and alkali fluid environments, the present invention provides a long-lasting hydrophobic low-density high-strength polystyrene microspheres with stable and long-lasting hydrophobic properties. , suitable for acid and alkali fluid environment

Method used

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  • Hydrophobic low-density high-strength polystyrene microsphere and preparation method thereof
  • Hydrophobic low-density high-strength polystyrene microsphere and preparation method thereof
  • Hydrophobic low-density high-strength polystyrene microsphere and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] A preparation method of durable hydrophobic low-density high-strength polystyrene microspheres, the process is as follows

[0058] In step 1, 0.4 parts of polyvinyl alcohol are dissolved in 400 parts of deionized water to obtain an aqueous phase with a concentration of 0.1%.

[0059] In step 2, 20 parts of styrene, 5 parts of divinylbenzene, 5 parts of γ-methacryloxypropyl trimethoxysilane and 0.1 part of dibenzoyl peroxide are premixed to obtain an oil phase.

[0060] Step 3: Slowly add the oil phase to the water phase. During the addition process, control the stirring speed to 40rpm and the temperature to 40°C until all the oil phase is added to the water phase.

[0061] Step 4: After all the oil phase is added to the water phase, the stirring speed is controlled at 60 rpm, and the temperature is raised to 65°C in stages, and then reacted for 1 hour.

[0062] Step 5: Suction filtration and washing to obtain the spherical core.

[0063] Step 6, add 10 parts of potass...

Embodiment 2

[0067] A preparation method of durable hydrophobic low-density high-strength polystyrene microspheres, the process is as follows

[0068] Step 1. Dissolve 4 parts of cellulose ether in 400 parts of deionized water to obtain an aqueous phase with a concentration of 1%.

[0069] In step 2, 40 parts of styrene, 6 parts of divinylbenzene, 1 part of vinyltrimethoxysilane and 1.2 parts of azobisisobutyronitrile were premixed to obtain an oil phase.

[0070] Step 3: Slowly add the oil phase into the water phase. During the addition process, control the stirring speed at 100 rpm and the temperature at 60° C. until all the oil phase is added into the water phase.

[0071] Step 4: After all the oil phase is added to the water phase, the stirring speed is controlled at 130 rpm, and the temperature is raised to 100°C in stages, and then reacted for 5 hours.

[0072] Step 5: Suction filtration and washing to obtain the spherical core.

[0073] Step 6, add 10 parts of potassium-type silic...

Embodiment 3

[0077] A preparation method of durable hydrophobic low-density high-strength polystyrene microspheres, the process is as follows

[0078] Step 1. Dissolve 3 parts of sodium dodecylbenzenesulfonate in 200 parts of deionized water to obtain an aqueous phase with a concentration of 1.5%.

[0079] Step 2, premixing 26 parts of styrene, 5 parts of divinylbenzene, 3 parts of vinyltriethoxysilane and 0.25 parts of dibenzoyl peroxide to obtain an oil phase.

[0080] Step 3: Slowly add the oil phase into the water phase. During the addition process, control the stirring speed at 100 rpm and the temperature at 45° C. until all the oil phase is added into the water phase.

[0081] Step 4: After all the oil phase is added to the water phase, the stirring speed is controlled at 150 rpm, and the temperature is raised to 70° C. in stages for 2.5 hours of reaction.

[0082] Step 5: Suction filtration and washing to obtain the spherical core.

[0083] Step 6: Add 5 parts of potassium-type si...

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Abstract

In order to overcome the problems of poor hydrophobicity and inapplicability in acid and alkali fluid environments of polystyrene microspheres in the prior art, the invention discloses a durable hydrophobic low-density high-strength polystyrene microsphere. The durable hydrophobic low-density high-strength polystyrene microsphere comprises a sphere core, and a film layer coating the sphere core. The invention also discloses a preparation method of the durable hydrophobic low-density high-strength polystyrene microsphere. The preparation method comprises the following steps: preparing the sphere core, preparing low-temperature cured film-layer raw materials, coating the sphere core wih the film layer and the like. The durable hydrophobic low-density high-strength polystyrene microsphere provided by the invention has stable and durable hydrophobic performance and is applicable to acid and alkali fluid environments. The preparation method of the durable hydrophobic low-density high-strength polystyrene microsphere in the invention has the advantages of high yield, no organic solvent, simple technique and environment friendliness.

Description

technical field [0001] The invention relates to the technical field of functional polymer materials, in particular to a durable hydrophobic low-density and high-strength polystyrene microsphere and a preparation method thereof. Background technique [0002] As a polymer functional material, polystyrene microspheres have very broad application prospects in the fields of biomedicine, analytical chemistry, organic synthesis, and petroleum exploration. For example, polystyrene microspheres are used as proppants in oil and gas exploration, or polystyrene microspheres are used as hydrophobic materials in coatings. In the application of the above-mentioned polystyrene microspheres, they all need to have good hydrophobicity, acid resistance and alkali resistance. [0003] In the prior art, hydrophobic polystyrene microspheres are usually prepared by introducing functional monomers such as methyl methacrylate and tert-butylstyrene into the radical copolymerization system of styrene ...

Claims

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Application Information

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IPC IPC(8): C08J3/12C08F212/08C08F212/36C09K8/80C08L25/08
CPCC08J3/126C08F212/08C09K8/80C08J2325/08C08J2427/18C08F212/36
Inventor 龚云蕾李程浩宋立志袁辉任先艳郑华安吴绍伟廖云虎周泓宇万小进
Owner CNOOC TIANJIN BRANCH
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