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Method for preparing mono-disperse polymer functional microspheres with photochemical method

A monodisperse, polymer technology, applied in the field of preparing monodisperse polymer functional microspheres, can solve the problems of uneven particle size, size, dispersibility, purity, resilience and thermal expansion that are difficult to meet requirements, and achieve polymerization reaction. The effect of rapidity, high production efficiency and low energy consumption

Inactive Publication Date: 2012-10-17
苏州异导光电材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing monodisperse polymer functional microspheres by photochemical method, which solves the problem of uneven particle size, size, dispersibility, purity, resilience, Thermal expansion is difficult to meet the needs and other problems

Method used

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  • Method for preparing mono-disperse polymer functional microspheres with photochemical method
  • Method for preparing mono-disperse polymer functional microspheres with photochemical method
  • Method for preparing mono-disperse polymer functional microspheres with photochemical method

Examples

Experimental program
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Effect test

Embodiment 1

[0054] The synthesis of embodiment 1 solid cross-linked polystyrene microspheres

[0055] Take by weighing 15g of styrene (St) treated with 5% NaOH solution, 7.5g of divinylbenzene (DVB) treated, 0.15g of sodium lauryl sulfate (SLS), 0.1g of Tween 80, polyethylene Pyrrolidone PVP-K90 3.0g, RAFT reagent N-carbazole dithioisobutyronitrile (CYCBD) 0.15g, photoinitiator 2, 4, 6 (trimethylbenzoyl) diphenylphosphine oxide (TPO) Add 0.15g, 60g ethanol, 60g ethylene glycol monoether, and 200g water into a 500ml single-necked flask, and use an ultrasonic homogenizer to sonicate for more than 30 minutes, and cool while sonicating to make a uniform and stable dispersion.

[0056] The dispersion liquid was transferred into a 500ml four-necked reaction bottle equipped with a condenser and a thermometer, stirred and vacuumed, filled with nitrogen to a constant pressure, and adjusted the nitrogen flow rate until small bubbles escaped intermittently. At room temperature, irradiate with a hom...

Embodiment 2

[0057] The synthesis of embodiment 2 porous cross-linked polystyrene microspheres

[0058] In the reaction raw material formulation in Example 1, 10 g of cyclohexane was added to obtain porous cross-linked polystyrene microspheres with a size of 1.0 μm. The operating steps are the same as in Example 1.

Embodiment 3

[0059] Example 3 Synthesis of amino-containing cross-linked polystyrene microspheres

[0060] In the reaction raw material formula in embodiment 1, add 3.0g epoxy vinyl ethers of methacrylic acid, can obtain the solid cross-linked polystyrene microsphere that size is 1.6 μ m and surface contains epoxy group, microsphere uses ethylenediamine After treatment, the amino group-containing cross-linked polystyrene microspheres can be obtained, which can be used to prepare conductive microspheres.

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Abstract

The invention discloses a method for preparing mono-disperse polymer functional microspheres with a photochemical method. According to the invention, under the regulation of a reversible addition-fragmentation chain transfer (RAFT) reagent, polymer functional microspheres with various sizes such as nano-grade sizes and micron-grade sizes, and with uniform particle sizes are synthesized by using the photochemical method. First, mono-functional group carbon-carbon double-bond monomers, multifunctional group carbon-carbon double-bond cross-linking agents, monomers containing functional groups, a dispersing agent, a stabilizing agent, the RAFT reagent, a photoinitiator, a pore-forming agent, and the like are added into a mixed solvent; the mixture is subjected to ultrasonic emulsification, such that a uniform and stable dispersion liquid is produced; the dispersion liquid is transferred into a reaction bottle, and is stirred; vacuum pumping is carried upon the reaction bottle, and nitrogen is filled into the reaction bottle until constant pressure is achieved; the reaction bottle is irradiated by using an ultraviolet lamp under room temperature for approximately 8 hours, and the reaction is then stopped; an obtained reaction liquid is subjected to centrifugal sedimentation, washing, and drying, such that the mono-disperse polymer functional microspheres with uniform particle sizes are obtained. The preparation method provided by the invention is advantaged in high production efficiency, and is energy-saving and environment-friendly. According to different requirements, thousands of specifications of mono-disperse microspheres with particle sizes of 5 nanometers to 1000 micrometers can be prepared. The method is widely applied in fields related to paints, adhesives, biomedicines, and electronic information.

Description

technical field [0001] The invention belongs to the technical field of polymer polymerization, and in particular relates to a method for preparing monodisperse polymer functional microspheres by using a photochemical method. Background technique [0002] Now, synthetic polymer microspheres can be endowed with functions such as magnetism, fluorescence, conductivity, charge, thermosensitivity, elasticity, photoresponsiveness, and molecular imprinting. Widely used in coatings, adhesives, biomedicine and electronic information related fields. Among them, monodisperse cross-linked polymer microspheres with uniform particle size are favored due to their excellent functions and high added value, and have become key research and development targets in developed countries and domestic scientific research institutions, especially in LCD manufacturing and biomedicine. [0003] In terms of LCD: 1. As a liquid crystal spacer (spacer), control the thickness of the liquid crystal layer to...

Claims

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Application Information

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IPC IPC(8): C08F212/08C08F212/36C08F2/48C08F2/38C08J9/28C08F220/14C08F222/14C08F220/06
Inventor 纪克兵
Owner 苏州异导光电材料科技有限公司
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