Preparation method of anisotropic particles with variable morphology

An anisotropic and variable technology, applied in the field of synthesis of anisotropic asymmetric composite particles, can solve problems such as poor fluidity

Inactive Publication Date: 2013-12-25
天津知顺科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the problem of poor fluidity in the processing process caused by the complex synthesis process and high cross-linking of the current preparation of anisotropic composite particles, and provides a simple, environmentally friendly and easy-to-process preparation method

Method used

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  • Preparation method of anisotropic particles with variable morphology
  • Preparation method of anisotropic particles with variable morphology
  • Preparation method of anisotropic particles with variable morphology

Examples

Experimental program
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Effect test

Embodiment example 1

[0025]

[0026] According to the above ratio, a certain amount of silane coupling agent 3-(methacryloyloxy)propyltrimethoxysilane was dissolved in 160.0g deionized water, and added to the reactor, after stirring for 30 minutes, 20.0 g seed monomer styrene, feed nitrogen into the whole process, reflux and condense, add 0.12g initiator potassium persulfate after the system reaches 70°C, and polymerize for 7 hours to obtain the seed emulsion;

[0027]

[0028] Take 11.5g of the seed emulsion obtained in step (a), add 80.0g of deionized water, after ultrasonic dispersion, start stirring, add the second monomer acrylonitrile, swell at room temperature for half an hour, and wait until the reaction temperature of the system rises to 75°C Add 0.024g of initiator potassium persulfate, feed nitrogen into the whole process, reflux condensation, and polymerize for 5 hours; the emulsion is decompressed and dried at low temperature to constant weight, and non-spherical composite partic...

Embodiment example 2-5

[0031] In the implementation cases 2-5, the amount of the silane coupling agent was changed to 1.0 g, 3.0 g, 4.0 g, and 8.0 g respectively, and the rest of the steps were the same as in the implementation case 1. The transmission electron micrograph of the composite particle prepared by implementation case 2-3 is Figure 2-3 .

[0032] analyze Figure 2-3 It can be seen that when the dosage of the silane coupling agent is 1.0g or 3.0g, the protrusions of the composite particles gradually become larger.

Embodiment example 6-7

[0034] In Example 6-7, the silane coupling agent was changed to tetraethoxysilane and 3-aminopropyltriethoxysilane respectively, and the rest of the steps were the same as Example 1.

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PUM

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Abstract

The invention relates to a preparation method of anisotropic particles with variable morphology. The method comprises the following steps: firstly utilizing silanol hydrophilic groups produced by hydrolysis of a silane coupling agent to prepare a series of seeds with different hydrophilicities, then enabling the seeds to be swollen by monomers incompatible to the hydrophilic groups, and controlling the phase separation degree according to different phase separation degrees of polymers, which are induced by different interfacial tensions and incompatible to the hydrophilic groups so as to obtain the composite particles with the variable morphology. The composite particles contain organic-inorganic-organic phase non-spherical composite particles, which have an important significance for developing novel multi-component materials. The composite particles prepared by the preparation method disclosed by the invention are amphipathic, and can be used as compatibilizers, emulsifiers and the like for modifying mixtures of the incompatible polymers. The synthesis process is simple and easy to operate, clean, environment-friendly and easy to realize large-scale production; furthermore, the preparation method has universality and is suitable for other polymer systems which are mutually incompatible.

Description

technical field [0001] The invention belongs to the synthesis of anisotropic asymmetric composite particles, in particular to a method for preparing anisotropic composite particles with variable shapes. technical background [0002] Anisotropic composite particles generally refer to particles with asymmetric shape, chemical composition and / or performance, and non-uniform distribution, also known as Janus particles or asymmetric particles. Such particles can be composed of inorganic-inorganic, inorganic-organic, and organic-organic components, and their preparation methods are also various. The main preparation methods of anisotropic composite particles commonly reported in the literature are: microfluidic method, Template self-assembly method, dispersion polymerization method, emulsion polymerization method, etc. Such particles have shown attractive application prospects in optical biosensors, electronic displays, functional probes, self-assembly, surfactants, etc., and thu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F220/18C08F212/12C08F220/44C08F230/08C08F2/22
Inventor 赫川牛群李玉丹
Owner 天津知顺科技有限公司
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