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Polyimide-based high-thermal-conductivity graphite film
The invention discloses a polyimide-based high-thermal-conductivity graphite film, and relates to the technical field of graphite film preparation. The polyimide-based high-thermal-conductivity graphite film is prepared by the following steps: carrying out polycondensation on a dianhydride monomer containing 1,4,5,8-naphthalene tetracarboxylic anhydride and a diamine monomer in an aprotic polar solvent to obtain polyamide acid, then carrying out film casting and imidization treatment to obtain a polyimide film, and carrying out carbonization treatment and graphitization treatment to obtain the high-thermal-conductivity graphite film. According to the preparation method, inorganic auxiliaries are not added in the preparation process of the polyimide-based graphite film, the dianhydride monomer 1,4,5,8-naphthalenetetracarboxylic anhydride with the regular molecular structure is used for inducing graphitization transformation of polyimide in the carbonization and graphitization process from the molecular structure, the crystallinity is good, the technological process steps are saved, and the prepared graphite film is smooth and regular in surface. The appearance defects caused by non-uniform dispersion, overlarge particle size and the like of added inorganic auxiliaries in the prior art are avoided, the heat conductivity is good, and high heat caused by operation of electronic components can be effectively conducted when the polyimide-based high-thermal-conductivity graphite film is used as a heat dissipation component of the electronic components and communication equipment.
本发明公开了一种聚酰亚胺基高导热石墨膜，涉及石墨膜制备技术领域，是将含1,4,5,8‑萘四甲酸酐的二酐单体与二胺单体在非质子极性溶剂中缩聚得到聚酰胺酸，然后经流延成膜、亚胺化处理得到聚酰亚胺薄膜，再经碳化处理和石墨化处理得到高导热石墨膜。本发明在聚酰亚胺基石墨膜的制备过程中不添加无机助剂，而是从分子结构出发，利用规整分子结构的二酐单体1,4,5,8‑萘四甲酸酐来诱导聚酰亚胺在碳化石墨化过程中的石墨化转变，结晶度好，节省工艺流程步骤，制备的石墨膜表面光滑规整，避免现有技术中添加无机助剂分散不均、颗粒尺寸过大等带来的外观缺陷，且其导热性好，用作电子元器件及通讯设备的散热部件，能够有效传导电子元器件运行带来的高热量。
Polyimide-based high-thermal-conductivity graphite film
The invention discloses a polyimide-based high-thermal-conductivity graphite film, and relates to the technical field of graphite film preparation. The polyimide-based high-thermal-conductivity graphite film is prepared by the following steps: carrying out polycondensation on a dianhydride monomer containing 1,4,5,8-naphthalene tetracarboxylic anhydride and a diamine monomer in an aprotic polar solvent to obtain polyamide acid, then carrying out film casting and imidization treatment to obtain a polyimide film, and carrying out carbonization treatment and graphitization treatment to obtain the high-thermal-conductivity graphite film. According to the preparation method, inorganic auxiliaries are not added in the preparation process of the polyimide-based graphite film, the dianhydride monomer 1,4,5,8-naphthalenetetracarboxylic anhydride with the regular molecular structure is used for inducing graphitization transformation of polyimide in the carbonization and graphitization process from the molecular structure, the crystallinity is good, the technological process steps are saved, and the prepared graphite film is smooth and regular in surface. The appearance defects caused by non-uniform dispersion, overlarge particle size and the like of added inorganic auxiliaries in the prior art are avoided, the heat conductivity is good, and high heat caused by operation of electronic components can be effectively conducted when the polyimide-based high-thermal-conductivity graphite film is used as a heat dissipation component of the electronic components and communication equipment.
本发明公开了一种聚酰亚胺基高导热石墨膜，涉及石墨膜制备技术领域，是将含1,4,5,8‑萘四甲酸酐的二酐单体与二胺单体在非质子极性溶剂中缩聚得到聚酰胺酸，然后经流延成膜、亚胺化处理得到聚酰亚胺薄膜，再经碳化处理和石墨化处理得到高导热石墨膜。本发明在聚酰亚胺基石墨膜的制备过程中不添加无机助剂，而是从分子结构出发，利用规整分子结构的二酐单体1,4,5,8‑萘四甲酸酐来诱导聚酰亚胺在碳化石墨化过程中的石墨化转变，结晶度好，节省工艺流程步骤，制备的石墨膜表面光滑规整，避免现有技术中添加无机助剂分散不均、颗粒尺寸过大等带来的外观缺陷，且其导热性好，用作电子元器件及通讯设备的散热部件，能够有效传导电子元器件运行带来的高热量。
Polyimide-based high-thermal-conductivity graphite film
一种聚酰亚胺基高导热石墨膜
SUN SHANWEI (Autor:in) / MEI YAPING (Autor:in) / WANG FENG (Autor:in) / SHI ENTAI (Autor:in)
08.02.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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