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Preparation method of high-thermal-conductivity polyimide-based graphite film
The invention discloses a preparation method of a high-thermal-conductivity polyimide-based graphite film, which specifically comprises the following steps: pre-imidization is carried out by adopting a chemical imidization method, and then polyimide is prepared by adopting a low-temperature chemical method. And the graphite film is prepared through two stages of carbonization and graphitization. The method is simple in technological operation, high-temperature imidization is not needed in polyimide preparation in the preparation process, practicability is high, and energy is saved. And the prepared heat-conducting film is high in heat conductivity coefficient and easy to realize industrial production, and has industrial prospects. The polyimide film prepared by the method is complete in imidization and can be used for preparing a graphite film by high-temperature graphitization. Compared with a traditional polyimide film, the polyimide film is more suitable for being used as a base film for preparing a graphite film, the graphitization rate is increased, lattice defects are reduced, and the preparation method of the polyimide-based graphite film is a novel process.
本发明公开了一种高导热聚酰亚胺基石墨膜的制备方法，其具体制备方法包括以下步骤：采取化学亚胺法的方法进行预亚胺化，进而通过低温化学的方法制备聚酰亚胺。再通过碳化、石墨化两个阶段制得石墨膜。本发明工艺操作简单，制备过程中在聚酰亚胺制备不需要高温亚胺化，实用性强，节约能源。且制备得到的导热膜导热系数高，易于实现工业化生产，具有工业化前景。采用本方法制备的聚酰亚胺薄膜，亚胺化完全，可用于高温石墨化制备石墨膜。本发明的聚酰亚胺薄膜于传统聚酰亚胺薄膜更适合作为制备石墨膜的基膜，提高石墨化率和降低晶格缺陷，是一种新型工艺的聚酰亚胺基石墨膜制备方法。
Preparation method of high-thermal-conductivity polyimide-based graphite film
The invention discloses a preparation method of a high-thermal-conductivity polyimide-based graphite film, which specifically comprises the following steps: pre-imidization is carried out by adopting a chemical imidization method, and then polyimide is prepared by adopting a low-temperature chemical method. And the graphite film is prepared through two stages of carbonization and graphitization. The method is simple in technological operation, high-temperature imidization is not needed in polyimide preparation in the preparation process, practicability is high, and energy is saved. And the prepared heat-conducting film is high in heat conductivity coefficient and easy to realize industrial production, and has industrial prospects. The polyimide film prepared by the method is complete in imidization and can be used for preparing a graphite film by high-temperature graphitization. Compared with a traditional polyimide film, the polyimide film is more suitable for being used as a base film for preparing a graphite film, the graphitization rate is increased, lattice defects are reduced, and the preparation method of the polyimide-based graphite film is a novel process.
本发明公开了一种高导热聚酰亚胺基石墨膜的制备方法，其具体制备方法包括以下步骤：采取化学亚胺法的方法进行预亚胺化，进而通过低温化学的方法制备聚酰亚胺。再通过碳化、石墨化两个阶段制得石墨膜。本发明工艺操作简单，制备过程中在聚酰亚胺制备不需要高温亚胺化，实用性强，节约能源。且制备得到的导热膜导热系数高，易于实现工业化生产，具有工业化前景。采用本方法制备的聚酰亚胺薄膜，亚胺化完全，可用于高温石墨化制备石墨膜。本发明的聚酰亚胺薄膜于传统聚酰亚胺薄膜更适合作为制备石墨膜的基膜，提高石墨化率和降低晶格缺陷，是一种新型工艺的聚酰亚胺基石墨膜制备方法。
Preparation method of high-thermal-conductivity polyimide-based graphite film
一种高导热聚酰亚胺基石墨膜的制备方法
LIU YIDONG (author) / WENG MENGMAN (author) / ZHANG JISHENG (author) / MIN YONGGANG (author)
2022-11-18
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
High-thermal-conductivity polyimide composite graphite film and preparation method thereof
| European Patent Office | 2024
| European Patent Office | 2024