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Polymer graft modification composite hollow micro-bead and preparation thereof

A technology of hollow microbeads and graft modification, which is applied in the treatment of dyed polymer organic compounds, etc., can solve the problems of improvement, decrease in yield, and increased difficulty of preparation process, so as to suppress defect structures, improve compressive strength, highly operable effect

Inactive Publication Date: 2009-05-20
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the introduction of these high melting point components will cause a significant increase in the melting temperature of the hollow microspheres, which not only increases the cost of the hollow microspheres, but also increases the difficulty of its preparation process, reduces the yield, and even makes it difficult to obtain ideal hollow microspheres. bead
[0014] It can be seen from the above that these methods have certain limitations, and it is difficult to significantly improve the surface properties and compressive strength of hollow microspheres at the same time.

Method used

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  • Polymer graft modification composite hollow micro-bead and preparation thereof
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  • Polymer graft modification composite hollow micro-bead and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The first step of hollow microbead coupling treatment: first add the coupling agent methacryloxypropyltrimethoxysilane (KH570) into the ethanol solution. Wherein, the coupling agent content is 25%, the water content is 5%, and the ethanol content is 70%. In order to stabilize the coupling agent, the pH of the solution was adjusted to 4-5 with acetic acid in advance. 10 g of hollow glass microspheres were added into the ethanol solution under magnetic stirring, and reacted at 50° C. for 1 hour. Filter, wash with ethanol and acetone successively, and then put it into a hot air drier at 120°C for heat treatment for 2 hours, so that the coupling agent can fully react with the surface of the hollow glass microspheres, thereby introducing double bonds on the surface of the hollow microspheres to obtain Hollow glass microspheres treated with coupling agent (referred to as HGM-KH570).

[0050] The second step of graft polymerization of coupled microbeads: adding the hollow mi...

Embodiment 2

[0062] The first step of hollow microbead coupling treatment: first add vinyltrimethoxysilane coupling agent (A-171) into the ethanol solution. Wherein, the coupling agent content is 0.5%, the water content is 0.5%, and the ethanol content is 99%. In order to stabilize the coupling agent, the pH of the solution was adjusted to 3-4 with hydrochloric acid in advance. 10 g of hollow glass microspheres were added into the ethanol solution under magnetic stirring, and reacted at 80° C. for 8 hours. Filter, wash with acetone, and then put it into a rotary evaporator at 80 ° C for 5 hours of heat treatment, so that the coupling agent can fully react with the surface of the glass beads, thereby introducing double bonds on the surface of the beads to obtain the coupling agent-treated Hollow glass microspheres (referred to as HGM-A171).

[0063] The second step of coupled microbead graft polymerization: the hollow microspheres and the polymer monomer methyl methacrylate that have been...

Embodiment 3

[0073] The first step of hollow microbead coupling treatment: first add vinyltriethoxysilane coupling agent (A-151) into the ethanol solution. Wherein, the coupling agent content is 10%, the water content is 10%, and the ethanol content is 80%. In order to stabilize the coupling agent, the pH of the solution was adjusted to 5-6 with sulfuric acid in advance. 10 grams of hollow glass microspheres were added into the ethanol solution under magnetic stirring, and reacted at 25° C. for 5 hours. Filtrate, wash with ethanol, and then heat-treat it in a boiling drier at 150°C for 0.5 hours to make the coupling agent fully react with the surface of the hollow glass microspheres, thereby introducing double bonds on the surface of the hollow microspheres to obtain the coupling agent Processed hollow glass microspheres (referred to as HGM-A151).

[0074]The second step of coupling microbead graft polymerization: the hollow microspheres and the polymer monomer ethyl acrylate through cou...

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Abstract

The invention relates to a complex hollow microsphere of polymer grafting modification and a preparation method thereof, and pertains to the technical field of surface modification of hollow microsphere. The method provides the complex hollow microsphere of polymer grafting modification and the preparation method thereof aiming at the disadvantages that the surface properties and the compressive strength of the hollow microsphere up to now are hard to be improved simultaneouly. The complex hollow microsphere causes the compressive strength and the compatibility with matrix to be greatly improved by graft polymer on a surface, and can also inhibit defect structure in the surface of the complex hollow microsphere. The method is simple, easy to be operated, and low in cost. The complex hollow microsphere of polymer grafting modification is applied to complex material as light intensified filling.

Description

technical field [0001] The invention relates to the technical field of surface modification of hollow microspheres, in particular to composite hollow microspheres obtained by grafting polymers on the surface of hollow microspheres and a preparation method thereof. Background technique [0002] Hollow glass or ceramic microspheres are a new inorganic non-metallic spherical micropowder material with multifunctional properties such as small particle size, spherical shape, light weight, heat insulation, sound insulation, high temperature resistance, and wear resistance. Therefore, they are widely used in the aerospace industry and other civil fields. has a wide range of uses. [0003] Hollow glass microspheres can generally be divided into two categories, one is sorted from fly ash; the other is artificially synthesized. Fly ash microbeads are obtained by sorting the fly ash produced in the power generation process of thermal power plants. Due to poor sphericity, low purity an...

Claims

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Application Information

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IPC IPC(8): C08F292/00C09C3/10
Inventor 潘顺龙张敬杰杨岩峰宋广智罗世凯邓建国
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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