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Heat-conducting composite graphite film and preparation method thereof
The invention provides a heat-conducting composite graphite film which comprises chopped fibers, the average diameter of the chopped fibers is 9-12 micrometers, and the length of the chopped fibers is within the range of 1.5-6 mm; the chopped fibers are mesophase pitch-based carbon fibers subjected to surface modification, the mesophase pitch-based carbon fibers are obtained by spinning mesophase pitch raw materials with the mesophase content value being 100% and then conducting graphitization treatment at the high temperature of 2800-3200 DEG C, and the grain size La of the mesophase pitch-based carbon fibers is greater than 22.4 nm. The preparation method comprises the following steps: performing surface treatment on the chopped fibers; mixing and reacting the chopped fibers with a dianhydride monomer, a diamine monomer and a solvent pair; and carrying out imidization treatment, carbonization and high-temperature graphitization treatment. The heat-conducting composite graphite film disclosed by the invention has the advantages of good heat-conducting property, good bending resistance and the like.
本发明提供一种导热复合石墨膜，其中包括短切纤维，所述短切纤维的平均直径为9‑12微米，长度在1.5‑6毫米范围内；所述短切纤维为表面改性处理后的中间相沥青基碳纤维，中间相沥青基碳纤维是中间相含量值为100％的中间相沥青原料纺丝后再经过2800‑3200℃高温石墨化处理所得，其晶粒尺寸La大于22.4nm。制备方法包括：短切纤维的表面处理；短切纤维与二酐单体、二胺单体、溶剂对的混合反应；亚胺化处理、炭化、高温石墨化处理。本发明的导热复合石墨膜具有导热性能好，抗弯折性能好等优势。
Heat-conducting composite graphite film and preparation method thereof
The invention provides a heat-conducting composite graphite film which comprises chopped fibers, the average diameter of the chopped fibers is 9-12 micrometers, and the length of the chopped fibers is within the range of 1.5-6 mm; the chopped fibers are mesophase pitch-based carbon fibers subjected to surface modification, the mesophase pitch-based carbon fibers are obtained by spinning mesophase pitch raw materials with the mesophase content value being 100% and then conducting graphitization treatment at the high temperature of 2800-3200 DEG C, and the grain size La of the mesophase pitch-based carbon fibers is greater than 22.4 nm. The preparation method comprises the following steps: performing surface treatment on the chopped fibers; mixing and reacting the chopped fibers with a dianhydride monomer, a diamine monomer and a solvent pair; and carrying out imidization treatment, carbonization and high-temperature graphitization treatment. The heat-conducting composite graphite film disclosed by the invention has the advantages of good heat-conducting property, good bending resistance and the like.
本发明提供一种导热复合石墨膜，其中包括短切纤维，所述短切纤维的平均直径为9‑12微米，长度在1.5‑6毫米范围内；所述短切纤维为表面改性处理后的中间相沥青基碳纤维，中间相沥青基碳纤维是中间相含量值为100％的中间相沥青原料纺丝后再经过2800‑3200℃高温石墨化处理所得，其晶粒尺寸La大于22.4nm。制备方法包括：短切纤维的表面处理；短切纤维与二酐单体、二胺单体、溶剂对的混合反应；亚胺化处理、炭化、高温石墨化处理。本发明的导热复合石墨膜具有导热性能好，抗弯折性能好等优势。
Heat-conducting composite graphite film and preparation method thereof
一种导热复合石墨膜及其制备方法
LI WENLONG (author) / FAN XIAO (author) / XIONG PING (author) / CHEN JUE (author) / CHEN DE (author)
2021-09-07
Patent
Electronic Resource
Chinese
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