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Preparation method of graphene heat-conducting thick film
The invention discloses a preparation method of a graphene heat-conducting thick film. The preparation method comprises the following steps of spraying a graphene oxide dispersion liquid on a base film by adopting a thermal spraying method, drying to form a composite film of the graphene oxide layer and the base film layer, reducing the graphene oxide layer, carrying out carbonization and graphitization on the composite film, and pressing the carbonized and graphitized composite film into the graphene heat-conducting thick film. The graphene oxide film and the artificial graphite layer prepared from PI (polyimide) are compounded and are subjected to heat treatment together, so that the problem of layering of an existing thick film is solved, the thicker graphene composite film with high thermal conductivity can be prepared, the thickness can reach 300 microns, layering and powder falling are avoided, and the bending resistance is high.
本发明公开了一种石墨烯导热厚膜的制备方法，包括以下步骤：采用热喷涂法将氧化石墨烯分散液喷涂于基膜上；干燥，形成氧化石墨烯层与基膜层的复合膜；对氧化石墨烯层进行还原；对复合膜进行碳化和石墨化；将碳化和石墨化的复合膜压制成石墨烯导热厚膜。本发明通过氧化石墨烯膜和由PI（聚酰亚胺）制备的人工石墨层进行复合，并一起进行热处理，解决了现有厚膜分层的问题，可制备出较厚的高导热的石墨烯复合膜，厚度可达300微米，且不分层不掉粉，耐弯折性能高。
Preparation method of graphene heat-conducting thick film
The invention discloses a preparation method of a graphene heat-conducting thick film. The preparation method comprises the following steps of spraying a graphene oxide dispersion liquid on a base film by adopting a thermal spraying method, drying to form a composite film of the graphene oxide layer and the base film layer, reducing the graphene oxide layer, carrying out carbonization and graphitization on the composite film, and pressing the carbonized and graphitized composite film into the graphene heat-conducting thick film. The graphene oxide film and the artificial graphite layer prepared from PI (polyimide) are compounded and are subjected to heat treatment together, so that the problem of layering of an existing thick film is solved, the thicker graphene composite film with high thermal conductivity can be prepared, the thickness can reach 300 microns, layering and powder falling are avoided, and the bending resistance is high.
本发明公开了一种石墨烯导热厚膜的制备方法，包括以下步骤：采用热喷涂法将氧化石墨烯分散液喷涂于基膜上；干燥，形成氧化石墨烯层与基膜层的复合膜；对氧化石墨烯层进行还原；对复合膜进行碳化和石墨化；将碳化和石墨化的复合膜压制成石墨烯导热厚膜。本发明通过氧化石墨烯膜和由PI（聚酰亚胺）制备的人工石墨层进行复合，并一起进行热处理，解决了现有厚膜分层的问题，可制备出较厚的高导热的石墨烯复合膜，厚度可达300微米，且不分层不掉粉，耐弯折性能高。
Preparation method of graphene heat-conducting thick film
一种石墨烯导热厚膜的制备方法
JIN CHUANG (author) / LI WEIGANG (author)
2022-01-07
Patent
Electronic Resource
Chinese
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