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Polyimide-based high-thermal-conductivity graphite film as well as preparation method and application thereof
The invention relates to a polyimide-based high-thermal-conductivity graphite film and a preparation method and application thereof.The preparation method comprises the following preparation steps that S1, a diamine monomer, a dianhydride monomer and calcium phosphate react in a polar solvent, and a polyamide acid solution is obtained; s2, the polyamide acid solution obtained in the step S1 is subjected to film casting and imidization treatment, and a polyimide film is prepared; and S3, carbonizing and graphitizing the polyimide film obtained in the step S2 to obtain the polyimide-based high-thermal-conductivity graphite film. Compared with the prior art, the method has the advantages that calcium phosphate promotes molecular orientation in a polyamide film plane, ordered arrangement and accumulation of a graphite microcrystalline structure are facilitated during carbonization and graphitization, the graphitization degree is improved, lattice defects are reduced, the heat conductivity coefficient of the prepared polyimide-based graphite film is high, and the heat-conducting property can reach 1800 W/m.K.
本发明涉及一种聚酰亚胺基高导热石墨薄膜及其制备方法与应用，包括如下制备步骤：S1、将二胺单体、二酐单体、磷酸钙在极性溶剂中反应，得到聚酰胺酸溶液；S2、将S1步骤得到的聚酰胺酸溶液进行流延成膜、亚胺化处理，制得聚酰亚胺薄膜；S3、将S2步骤得到的聚酰亚胺薄膜经炭化、石墨化处理，得到聚酰亚胺基高导热石墨薄膜。与现有技术相比，本发明通过磷酸钙对聚酰胺薄膜面内的分子取向起到促进作用，在炭化和石墨化时有利于石墨微晶结构的有序排列和堆积，提高石墨化程度，降低晶格缺陷，制备得到的聚酰亚胺基石墨薄膜的导热系数高，导热性能可达1800W/m·K。
Polyimide-based high-thermal-conductivity graphite film as well as preparation method and application thereof
The invention relates to a polyimide-based high-thermal-conductivity graphite film and a preparation method and application thereof.The preparation method comprises the following preparation steps that S1, a diamine monomer, a dianhydride monomer and calcium phosphate react in a polar solvent, and a polyamide acid solution is obtained; s2, the polyamide acid solution obtained in the step S1 is subjected to film casting and imidization treatment, and a polyimide film is prepared; and S3, carbonizing and graphitizing the polyimide film obtained in the step S2 to obtain the polyimide-based high-thermal-conductivity graphite film. Compared with the prior art, the method has the advantages that calcium phosphate promotes molecular orientation in a polyamide film plane, ordered arrangement and accumulation of a graphite microcrystalline structure are facilitated during carbonization and graphitization, the graphitization degree is improved, lattice defects are reduced, the heat conductivity coefficient of the prepared polyimide-based graphite film is high, and the heat-conducting property can reach 1800 W/m.K.
本发明涉及一种聚酰亚胺基高导热石墨薄膜及其制备方法与应用，包括如下制备步骤：S1、将二胺单体、二酐单体、磷酸钙在极性溶剂中反应，得到聚酰胺酸溶液；S2、将S1步骤得到的聚酰胺酸溶液进行流延成膜、亚胺化处理，制得聚酰亚胺薄膜；S3、将S2步骤得到的聚酰亚胺薄膜经炭化、石墨化处理，得到聚酰亚胺基高导热石墨薄膜。与现有技术相比，本发明通过磷酸钙对聚酰胺薄膜面内的分子取向起到促进作用，在炭化和石墨化时有利于石墨微晶结构的有序排列和堆积，提高石墨化程度，降低晶格缺陷，制备得到的聚酰亚胺基石墨薄膜的导热系数高，导热性能可达1800W/m·K。
Polyimide-based high-thermal-conductivity graphite film as well as preparation method and application thereof
一种聚酰亚胺基高导热石墨薄膜及其制备方法与应用
YANG GUANGZHI (author) / WANG KUNFENG (author) / SHI KEWEI (author) / ZHOU YUDAN (author) / LI JING (author) / LIU QIRUI (author)
2024-12-06
Patent
Electronic Resource
Chinese
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