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A kind of preparation method of polyimide composite microsphere with hollow structure

A technology of composite microspheres and polyimide, which is applied in the preparation of microspheres, microcapsule preparations, etc., can solve the problems of high solvent consumption, difficult removal of thermal surfactants, and difficulty in controlling the morphology of microspheres. Avoid thermal properties, easy topography effects

Active Publication Date: 2016-08-17
HEILONGJIANG HEIKE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims to solve the problem that the existing method for preparing polyimide composite microspheres consumes a large amount of solvent, the shape of the microspheres is difficult to control, the solvent is easy to damage the internal structure of the part, and the problem introduced in the preparation process to avoid reducing the thermal performance of the material The problem that the surfactant is difficult to remove provides a method for preparing polyimide composite microspheres with a hollow structure

Method used

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  • A kind of preparation method of polyimide composite microsphere with hollow structure
  • A kind of preparation method of polyimide composite microsphere with hollow structure
  • A kind of preparation method of polyimide composite microsphere with hollow structure

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specific Embodiment approach 1

[0024] Specific embodiment one: the preparation method of the polyimide composite microsphere of a kind of hollow structure described in the present embodiment is to carry out according to the following steps:

[0025] 1. Mix the polystyrene microsphere solution and the pyrrole monomer under the condition of magnetic stirring, then add ferric chloride, and stir magnetically for 8h to 12h to obtain the polypyrrole-coated polystyrene composite microsphere solution, which will be obtained The solution of polypyrrole-coated polystyrene composite microspheres is subjected to centrifugation, and after centrifugation, the solid is washed with ethanol for 2 to 4 times and then dried to obtain polypyrrole-coated polystyrene composite microspheres; the polystyrene microspheres The solid content is 5%; The volume ratio of described polystyrene microsphere solution and pyrrole monomer is 1:(0.1~0.5); The volume ratio of the quality of described iron trichloride and polystyrene microsphere ...

specific Embodiment approach 2

[0036] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the volume ratio of polystyrene microspheres and pyrrole monomers in step 1 is 1:0.125. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0037] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the volume ratio of polystyrene microspheres and pyrrole monomers in step one is 1:0.2. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a method for preparing hollow polyimide composite microspheres, which relates to a method for preparing polyimide composite microspheres. The present invention aims to solve the problems of large solvent consumption in the preparation of polyimide composite microspheres in the existing method, difficulty in controlling the microsphere morphology, easy damage of solvents to part of the internal structure, and the introduction of The problem that the surfactant is difficult to remove. Methods: 1. coating; 2. preparing polyamic acid solution; 3. preparing polyamic acid composite microspheres; 4. preparing polyimide composite microspheres. The preparation method of the polyimide composite microspheres provided by the present invention can well control the morphology of the composite microspheres, can avoid the collapse of the polyimide shell, and can make the microspheres have a hollow structure to reduce the dielectric strength. constant properties. The invention is suitable for high-temperature-resistant and low-dielectric materials, wave-absorbing materials, catalyst carriers and the like.

Description

technical field [0001] The invention relates to a preparation method of polyimide composite microspheres. Background technique [0002] With the gradual development of nanoscience, many people focus their research on micro-scale structures. In fact, materials composed of micro-sized, ultra-fine powders hold great potential for functionality. Hollow microspheres have good application prospects in catalysis and functional materials because of their excellent characteristics such as low density and high specific surface area. [0003] The preparation of polyimide into micro-nano spheres will help to increase the specific surface area of ​​polyimide materials, increase its dispersibility in common organic solvents and even in water, and help reduce the processing difficulty of polyimide materials. At the same time, various specific micro-nano morphologies will endow this traditional special engineering plastic with broader application prospects. Based on the above reasons, po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/10C08G73/06B01J13/02
Inventor 方雪苏桂明姜海健马宇良陈明月姚立明张晓臣宋美慧
Owner HEILONGJIANG HEIKE TECH CO LTD
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