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Composite graphene heat-conducting film and preparation method thereof
The invention provides a composite graphene heat-conducting film and a preparation method thereof, and the preparation method comprises the following steps: adding liquid-phase stripping method graphene, titanium dioxide nanosheets and a dispersing agent PVP (Polyvinyl Pyrrolidone) in a mass ratio of 100: (1-10): (10-20) into water, and stirring to obtain composite graphene slurry; coating a base material with the composite graphene slurry, feeding the coated base material into a tunnel furnace, and finally separating and rolling a film from the base material to obtain the composite graphene heat-conducting film. When the composite graphene heat-conducting film is prepared, liquid-phase stripping method graphene and titanium dioxide nanosheets are compounded, and the titanium dioxide nanosheets have relatively high electronegativity, so that the interaction between liquid-phase stripping method graphene sheet layers is enhanced; therefore, the liquid-phase stripping method graphene slurry can form a dense graphene film after being coated and dried in a tunnel furnace, the porosity is remarkably reduced, the orientation degree of graphene is also improved, and the in-plane heat conductivity is improved. Meanwhile, the preparation method is simple in process, low in energy consumption and easy for mass production.
本发明提供一种复合石墨烯导热膜及其制备方法，包括将质量比为100：(1‑10)：(10‑20)的液相剥离法石墨烯、二氧化钛纳米片和分散剂PVP加入水中搅拌，得到复合石墨烯浆料；先将复合石墨烯浆料涂布于基材上，再将涂布后的基材送入隧道炉，最后将薄膜与基材分离、收卷，得到复合石墨烯导热膜。通在制备复合石墨烯导热膜时，将液相剥离法石墨烯与二氧化钛纳米片复合，由于二氧化钛纳米片具有较高的电负性，增强了液相剥离法石墨烯片层间的相互作用，因而能够使液相剥离法石墨烯浆料在涂布经过隧道炉烘干后形成密实的石墨烯薄膜，使孔隙率显著降低，石墨烯的取向度也有所改善，因而，提高了面内热导率。同时，该制备方法工艺简单，能耗低，易于量产。
Composite graphene heat-conducting film and preparation method thereof
The invention provides a composite graphene heat-conducting film and a preparation method thereof, and the preparation method comprises the following steps: adding liquid-phase stripping method graphene, titanium dioxide nanosheets and a dispersing agent PVP (Polyvinyl Pyrrolidone) in a mass ratio of 100: (1-10): (10-20) into water, and stirring to obtain composite graphene slurry; coating a base material with the composite graphene slurry, feeding the coated base material into a tunnel furnace, and finally separating and rolling a film from the base material to obtain the composite graphene heat-conducting film. When the composite graphene heat-conducting film is prepared, liquid-phase stripping method graphene and titanium dioxide nanosheets are compounded, and the titanium dioxide nanosheets have relatively high electronegativity, so that the interaction between liquid-phase stripping method graphene sheet layers is enhanced; therefore, the liquid-phase stripping method graphene slurry can form a dense graphene film after being coated and dried in a tunnel furnace, the porosity is remarkably reduced, the orientation degree of graphene is also improved, and the in-plane heat conductivity is improved. Meanwhile, the preparation method is simple in process, low in energy consumption and easy for mass production.
本发明提供一种复合石墨烯导热膜及其制备方法，包括将质量比为100：(1‑10)：(10‑20)的液相剥离法石墨烯、二氧化钛纳米片和分散剂PVP加入水中搅拌，得到复合石墨烯浆料；先将复合石墨烯浆料涂布于基材上，再将涂布后的基材送入隧道炉，最后将薄膜与基材分离、收卷，得到复合石墨烯导热膜。通在制备复合石墨烯导热膜时，将液相剥离法石墨烯与二氧化钛纳米片复合，由于二氧化钛纳米片具有较高的电负性，增强了液相剥离法石墨烯片层间的相互作用，因而能够使液相剥离法石墨烯浆料在涂布经过隧道炉烘干后形成密实的石墨烯薄膜，使孔隙率显著降低，石墨烯的取向度也有所改善，因而，提高了面内热导率。同时，该制备方法工艺简单，能耗低，易于量产。
Composite graphene heat-conducting film and preparation method thereof
复合石墨烯导热膜及其制备方法
ZHOU MING (author) / PAN ZHUOCHENG (author) / PAN ZHIJUN (author)
2023-03-28
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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