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Graphene composite kaolin powder as well as preparation method and application thereof
The invention discloses graphene composite kaolin powder and a preparation method and application thereof.According to the preparation method, firstly, the surface of kaolin powder is subjected to graft modification through an amino silane coupling agent, so that the kaolin powder and graphene oxide have opposite electrical properties within a certain pH range, when the pH ranges from 2 to 3, the kaolin powder and the graphene oxide can be effectively self-assembled, and the graphene composite kaolin powder is prepared; the problems that two materials with negative electricity, namely graphene and kaolin powder, are difficult to uniformly mix and graphene is easy to agglomerate in a ceramic collective sintered by the kaolin powder are solved, so that the graphene composite kaolin heat-conducting ceramic material is relatively compact in microstructure and low in porosity, the graphene constructs a rapid heat conduction path in the ceramic, and the heat conduction efficiency is improved. And the thermal diffusion coefficient and the thermal conductivity of the composite material are increased.
本发明公开了一种石墨烯复合高岭土粉体及其制备方法和应用，本发明的制备方法首先通过氨基硅烷偶联剂对高岭土粉体表面进行接枝改性，使之在一定pH范围内与氧化石墨烯呈现相反的电性，当pH为2‑3时，二者能够有效进行自组装，克服了石墨烯与高岭土粉体两种带负电的材料难以混合均匀且石墨烯在高岭土粉体烧结的陶瓷集体中容易团聚的问题，使得石墨烯复合高岭土导热陶瓷材料微观形貌较为致密，孔隙率低，石墨烯在陶瓷内部构建了快速热传导路径，增加了复合材料的热扩散系数和导热率。
Graphene composite kaolin powder as well as preparation method and application thereof
The invention discloses graphene composite kaolin powder and a preparation method and application thereof.According to the preparation method, firstly, the surface of kaolin powder is subjected to graft modification through an amino silane coupling agent, so that the kaolin powder and graphene oxide have opposite electrical properties within a certain pH range, when the pH ranges from 2 to 3, the kaolin powder and the graphene oxide can be effectively self-assembled, and the graphene composite kaolin powder is prepared; the problems that two materials with negative electricity, namely graphene and kaolin powder, are difficult to uniformly mix and graphene is easy to agglomerate in a ceramic collective sintered by the kaolin powder are solved, so that the graphene composite kaolin heat-conducting ceramic material is relatively compact in microstructure and low in porosity, the graphene constructs a rapid heat conduction path in the ceramic, and the heat conduction efficiency is improved. And the thermal diffusion coefficient and the thermal conductivity of the composite material are increased.
本发明公开了一种石墨烯复合高岭土粉体及其制备方法和应用，本发明的制备方法首先通过氨基硅烷偶联剂对高岭土粉体表面进行接枝改性，使之在一定pH范围内与氧化石墨烯呈现相反的电性，当pH为2‑3时，二者能够有效进行自组装，克服了石墨烯与高岭土粉体两种带负电的材料难以混合均匀且石墨烯在高岭土粉体烧结的陶瓷集体中容易团聚的问题，使得石墨烯复合高岭土导热陶瓷材料微观形貌较为致密，孔隙率低，石墨烯在陶瓷内部构建了快速热传导路径，增加了复合材料的热扩散系数和导热率。
Graphene composite kaolin powder as well as preparation method and application thereof
一种石墨烯复合高岭土粉体及其制备方法和应用
CHEN DANQING (author) / LI XINZHUO (author) / CHEN GUOHUA (author)
2024-11-22
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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