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Polymer phase-change microsphere and preparation method thereof

A technology of phase-change microspheres and polymers, applied in chemical instruments and methods, heat exchange materials, etc., can solve the problems of high energy consumption, small particle size of hollow microspheres in wastewater and waste residue, small particle size of phase-change microspheres, etc. question

Inactive Publication Date: 2008-08-27
金小刚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The first object of the present invention is to overcome the defects and deficiencies of the existing microsphere preparation method, such as high energy consumption, generation of waste water and waste residue, and smaller particle size of hollow microspheres, to provide a method that does not produce waste water and waste residue, and has less energy consumption. Preparation method of polymer phase change microspheres which are easy to scale production, simple in process, and controllable in particle size
[0004] The second object of the present invention is to overcome the defects and deficiencies of the existing phase change microspheres with small particle size and poor acid and alkali resistance, and provide a kind of phase change material with large particle size and adsorbed inside the microsphere, which is acid and alkali resistant. Polymer phase change microspheres with good alkali and thermal insulation properties

Method used

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preparation example Construction

[0065] A kind of preparation method of polymer phase change microsphere of the present invention, i.e. emulsion polymerization method, comprises the following steps:

[0066] A. Preparation of seed emulsion:

[0067] Mix the mixed emulsifier into the water and stir evenly, then add the oil-absorbing polymer monomer and copolymer monomer, stir quickly to make the monomer fully emulsified, then raise the temperature to 60-80°C, add the initiator and keep it warm for 4-6 hours get the seed emulsion,

[0068] The weight part content of described raw material is:

[0069] Water 1500-2500

[0070] Mixed emulsifier 1.5-2.5

[0071] Oil-absorbing polymer monomer 2-20

[0072] Copolymer monomer 4-6

[0073] Initiator 0.5-1.5;

[0074] B. Preparation of oil-absorbing core polymer:

[0075] At 60-80°C, slowly drop the emulsion composed of oil-absorbing polymer monomer, copolymer monomer, mixed emulsifier and water into the seed emulsion, and add alkaline aqueous solution after ful...

Embodiment 1

[0128] 1. Add 2000 grams of water, 1.25 grams of OP-10 surfactant and 0.65 grams of SDS into a four-neck flask equipped with a reflux condensing device and a stirrer, and stir thoroughly to make the surfactant completely dissolve in water, and then add 10 grams of formazan Isobutyl acrylate, 15 grams of MMA (methacrylic acid), adjust the rotating speed to be 1100 rpm to fully emulsify the monomer, then heat up to 70°C and add 5 grams of 2% KPS solution, and carry out emulsion polymerization at 70°C , react for 4-6 hours to obtain seed emulsion. The particle size of the seed emulsion measured by a particle size analyzer is 0.012 microns

[0129] 2. Using the above-prepared emulsion as seeds, prepare oil-absorbing cores: heat the above-prepared emulsion to 70°C, slowly add 285 grams of MMA, 177.5 grams of isobutyl methacrylate, 145 1 gram of styrene, 8 grams of mixed emulsifier (the solution after mixing OP-10 and SDS and water in a ratio of 3:1:96), and 600 grams of water, wit...

Embodiment 2

[0134]1. Add 2000 grams of water, 1.25 grams of OP-10 surfactant and 0.65 grams of SDS into a four-neck flask equipped with a reflux condensing device and a stirrer, and stir thoroughly to make the surfactant completely dissolve in water, then add 20 grams of formazan Isobornyl acrylate, 15 grams of MMA, adjust the speed to 1100 rpm to fully emulsify the monomer, then raise the temperature to 70°C, add 7 grams of 2% KPS solution, and carry out emulsion polymerization at 70°C, reaction 4-6 hour to obtain seed emulsion. The particle size of the seed emulsion measured by a particle size analyzer is 0.014 micron. If the feed ratio is adjusted to 30 grams of isobornyl methacrylate and 5 grams of MMA, the seed emulsion with a particle size of 0.023 microns can be obtained.

[0135] 2. Using the above prepared emulsion as seeds, prepare a water-absorbing shell: heat the above prepared emulsion to 70°C, slowly add 165 grams of MMA, 260 grams of isobutyl methacrylate, 90 1 gram of sty...

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Abstract

The invention relates to a polymer phase transformation microsphere and a relative preparation method. The preparation method comprises using emulsion polymerization method or suspension polymerization method to synthesize oil absorbing type resin, absorbing organic phase transformation material in the presence of water, coating outer layer, atomizing and drying to obtain the heat capacity microsphere with phase transformation function. The invention has low energy consumption, controllable preparation, various products, better acid and alkali resistance, better heat insulation, better size adaptability, high stability, adjustable grain size of microsphere, high production efficiency, low pollution and simple operation, which is suitable for construction material and paint, with wide application and practical value.

Description

technical field [0001] The invention relates to a polymer material and a preparation method thereof, in particular to a polymer phase change microsphere and a preparation method thereof. Background technique [0002] Polymer functional microspheres have received very high attention in recent years. According to the retrieved information, it can be known that polymer functional microspheres are a polymer material with a special structure, and the particle size is between microns and nanometers. , has the characteristics of capsules and special functions, and has broad application prospects in biology, light, magnetism, nuclear physics, and electronics. This technology has been a research hotspot in recent years. Up to now, there are various methods for preparing polymer functional microspheres, among which emulsion polymerization is the main method, which has formed a relatively mature process because of its simple conditions and easy implementation. In order to obtain polym...

Claims

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Application Information

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IPC IPC(8): C08F220/10C08F212/08C08F226/06C08F218/08C08F2/22C08F2/18C08F8/00C08J3/12C08L33/04C08K5/01C09K5/06
Inventor 金小刚邓岩刚但毅
Owner 金小刚
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