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The invention belongs to the field of heat-conducting graphite materials, and particularly relates to a high-heat-conducting graphite film prepared through a high-temperature carbonization and graphitization process, and a preparation method and application of the high-heat-conducting graphite film. The invention provides a preparation method of a graphite film. The preparation method comprises the following steps: firstly, preparing a modified aromatic oxadiazole wet film; performing biaxial stretching on the obtained wet film, and drying to obtain a dry modified aromatic polyoxadiazole film; and finally, carrying out high-temperature carbonization and graphitization treatment on the dry-state modified aromatic polyoxadiazole film to obtain the graphite film. Wherein the structural formula of the modified polyaryloxadiazole is shown in the specification, and x: y: z is equal to (0.95 to 0.55): (0.05 to 0.45): (0.01 to 0.10). The thickness of the prepared graphite film is 20-200 [mu] m, the density is 1.85-2.2 g/cm < 3 >, and the heat conductivity coefficient is 1400-1800 W/(mK). # imgabs0 #
本发明属于导热石墨材料领域，具体涉及一种通过高温碳化与石墨化过程制备的高导热石墨膜及其制备方法和应用。本发明提供一种石墨膜的制备方法：先制得改性聚芳噁二唑的湿态膜；再将所得湿态膜通过双轴拉伸并干燥制得干态改性聚芳噁二唑薄膜；最后将干态改性聚芳噁二唑薄膜通过高温碳化和石墨化处理制得所述石墨膜；其中，所述改性聚芳噁二唑的结构式如下，其中，x：y：z＝(0.95～0.55)：(0.05～0.45)：(0.01～0.10)。本发明所制备的石墨膜的厚度为20‑200μm，密度为1.85‑2.2g/cm3，导热系数为1400‑1800W/(mK)。#imgabs0#
The invention belongs to the field of heat-conducting graphite materials, and particularly relates to a high-heat-conducting graphite film prepared through a high-temperature carbonization and graphitization process, and a preparation method and application of the high-heat-conducting graphite film. The invention provides a preparation method of a graphite film. The preparation method comprises the following steps: firstly, preparing a modified aromatic oxadiazole wet film; performing biaxial stretching on the obtained wet film, and drying to obtain a dry modified aromatic polyoxadiazole film; and finally, carrying out high-temperature carbonization and graphitization treatment on the dry-state modified aromatic polyoxadiazole film to obtain the graphite film. Wherein the structural formula of the modified polyaryloxadiazole is shown in the specification, and x: y: z is equal to (0.95 to 0.55): (0.05 to 0.45): (0.01 to 0.10). The thickness of the prepared graphite film is 20-200 [mu] m, the density is 1.85-2.2 g/cm < 3 >, and the heat conductivity coefficient is 1400-1800 W/(mK). # imgabs0 #
本发明属于导热石墨材料领域，具体涉及一种通过高温碳化与石墨化过程制备的高导热石墨膜及其制备方法和应用。本发明提供一种石墨膜的制备方法：先制得改性聚芳噁二唑的湿态膜；再将所得湿态膜通过双轴拉伸并干燥制得干态改性聚芳噁二唑薄膜；最后将干态改性聚芳噁二唑薄膜通过高温碳化和石墨化处理制得所述石墨膜；其中，所述改性聚芳噁二唑的结构式如下，其中，x：y：z＝(0.95～0.55)：(0.05～0.45)：(0.01～0.10)。本发明所制备的石墨膜的厚度为20‑200μm，密度为1.85‑2.2g/cm3，导热系数为1400‑1800W/(mK)。#imgabs0#
High-thermal-conductivity graphite film as well as preparation method and application thereof
一种高导热石墨膜及其制备方法和应用
2024-04-30
Patent
Electronic Resource
Chinese
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