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Method for preparing micron-level crosslinked polystyrene microsphere

A cross-linked polystyrene, micron-scale technology, applied in the field of preparation of micron-scale cross-linked polystyrene microspheres, can solve the problems of high toxicity of acetonitrile, and achieve the effect of simple and easy preparation method

Inactive Publication Date: 2010-09-01
LUDONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the precipitation polymerization method, the commonly used solvent is acetonitrile, but acetonitrile is highly toxic. The development of a new solvent system for precipitation polymerization has attracted great attention. Looking for an environmentally friendly solvent to replace acetonitrile can solve the toxicity of acetonitrile in the precipitation polymerization method. Big questions are especially important

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] 50 ml of ethanol, 0.1 ml of styrene, 0.4 ml of pentaerythritol tetraacrylate and 0.0057 g of azobisisobutyronitrile were mixed uniformly, the oscillation frequency was constant at 70 rpm, and the mixture was reacted at 70°C for 4 hours. The polymerized product was separated by centrifugation, washed with absolute ethanol, and dried to constant weight.

[0014] The obtained polystyrene microspheres have an average particle diameter of 0.59 micron and good monodispersity.

Embodiment 2

[0016] 50 ml of ethanol, 0.1 ml of styrene, 0.4 ml of pentaerythritol tetraacrylate and 0.0057 g of azobisisobutyronitrile were mixed uniformly, the oscillation frequency was constant at 30 rpm, and the mixture was reacted at 70°C for 4 hours. The polymerized product was separated by centrifugation, washed with absolute ethanol, and dried to constant weight.

[0017] The obtained polystyrene microspheres have an average particle diameter of 0.33 microns and good monodispersity.

Embodiment 3

[0019] 50 milliliters of ethanol, 0.05 milliliters of styrene, 0.45 milliliters of pentaerythritol tetraacrylate and 0.0059 grams of azobisisobutyronitrile were mixed uniformly, and the oscillation frequency was kept at 70 revolutions per minute, and reacted at 70 degrees Celsius for 4 hours. The polymerized product was separated by centrifugation, washed with absolute ethanol, and dried to constant weight.

[0020] The obtained polystyrene microspheres have an average particle diameter of 0.55 microns and good monodispersity.

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PUM

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Abstract

The invention discloses a method for preparing a micron-level crosslinked polystyrene microsphere. The method is characterized by comprising the following steps of: dissolving a styrene monomer, pentaerythritol tetra-acrylate serving as a crosslinking agent and azodiisobutyronitrile serving as an evocating agent in ethanol which is an environmentally-friendly solvent, vibrating at the constant temperature for reaction, performing centrifugal separation on polymerisate, washing the polymerisate with absolute ethanol, and drying to constant weight. Through the preparation method disclosed by the invention, the crosslinked polystyrene microsphere with good single dispersion and particle diameter range between 0.3 and 1 micron can be obtained and can be applied to the fields of biological medicament, chromatographic packing, chemical analysis and the like.

Description

technical field [0001] The invention relates to a method for preparing micron-scale cross-linked polystyrene microspheres, belonging to the field of polymer microsphere materials. Background technique [0002] With the development of science and technology, polymer microsphere materials are more and more widely used in the fields of standard metrology, medical immunity, bioengineering, analytical chemistry, information information, chemical industry and microelectronics. Micron-scale cross-linked polystyrene microspheres have high specific surface area, high mechanical strength, good surface reactivity, excellent hydrophobicity, non-biodegradability, good controllability of particle size, and will not be dissolved or swelled by general solvents, which is convenient for application It is a research hotspot in the field of polymer microsphere materials due to its advantages of recycling and recycling. [0003] Suspension polymerization, emulsion polymerization and dispersion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F222/14C08F2/06
Inventor 陈厚姜红燕曲荣君王春华
Owner LUDONG UNIVERSITY
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