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Preparation method of graphite-aerogel double-layer even heating film
The invention discloses a preparation method of a graphite-aerogel double-layer even heating film, and relates to the technical field of even heating films. The preparation method comprises the following steps: (1) mixing hydrophobic silicon dioxide powder, sodium hydroxide and ethanol to obtain a modified sodium silicate solution; (2) adding the modified sodium silicate solution into an inorganic acid solution, and conducting filtering to obtain modified silica sol; (3) smearing the modified silica sol on a graphite flake with an acidic surface after etching, and conducting heating to obtain a graphite-modified silica gel composite film; and (4) carrying out solvent exchange on the graphite-modified silica gel composite film, and conducting drying to obtain the graphite-aerogel double-layer even heating film. The method has the beneficial effects that the surface temperature of the even heating film is more uniform, the surface of the graphite flake is etched, so that the adhesive force of the surface of the graphite flake and the modified silica sol is stronger, a specific heat conduction and insulation layer is formed, and in-plane rapid even heating is realized through in-plane directional heat conduction of graphite and a heat insulation function of aerogel.
本发明公开一种石墨‑气凝胶双层均热膜的制备方法，涉及均热模技术领域，本发明包括以下步骤：(1)将憎水二氧化硅粉末、氢氧化钠、乙醇混合，得到改性硅酸钠溶液；(2)将改性硅酸钠溶液加入无机酸溶液中，过滤，得到改性硅溶胶；(3)将改性硅溶胶涂覆到经过刻蚀后表面呈酸性的石墨片上，加热，获得石墨‑改性硅凝胶复合膜；(4)将石墨‑改性硅凝胶复合膜进行溶剂交换后干燥，即获得石墨‑气凝胶双层均热膜。本发明的有益效果在于：本发明中的均热膜表面温度更加均匀，石墨片表面经过刻蚀，使石墨片表面和改性硅溶胶的附着力更强，并且形成特定的导热和隔热层，通过石墨的面内定向导热和气凝胶的隔热功能来实现面内快速均热。
Preparation method of graphite-aerogel double-layer even heating film
The invention discloses a preparation method of a graphite-aerogel double-layer even heating film, and relates to the technical field of even heating films. The preparation method comprises the following steps: (1) mixing hydrophobic silicon dioxide powder, sodium hydroxide and ethanol to obtain a modified sodium silicate solution; (2) adding the modified sodium silicate solution into an inorganic acid solution, and conducting filtering to obtain modified silica sol; (3) smearing the modified silica sol on a graphite flake with an acidic surface after etching, and conducting heating to obtain a graphite-modified silica gel composite film; and (4) carrying out solvent exchange on the graphite-modified silica gel composite film, and conducting drying to obtain the graphite-aerogel double-layer even heating film. The method has the beneficial effects that the surface temperature of the even heating film is more uniform, the surface of the graphite flake is etched, so that the adhesive force of the surface of the graphite flake and the modified silica sol is stronger, a specific heat conduction and insulation layer is formed, and in-plane rapid even heating is realized through in-plane directional heat conduction of graphite and a heat insulation function of aerogel.
本发明公开一种石墨‑气凝胶双层均热膜的制备方法，涉及均热模技术领域，本发明包括以下步骤：(1)将憎水二氧化硅粉末、氢氧化钠、乙醇混合，得到改性硅酸钠溶液；(2)将改性硅酸钠溶液加入无机酸溶液中，过滤，得到改性硅溶胶；(3)将改性硅溶胶涂覆到经过刻蚀后表面呈酸性的石墨片上，加热，获得石墨‑改性硅凝胶复合膜；(4)将石墨‑改性硅凝胶复合膜进行溶剂交换后干燥，即获得石墨‑气凝胶双层均热膜。本发明的有益效果在于：本发明中的均热膜表面温度更加均匀，石墨片表面经过刻蚀，使石墨片表面和改性硅溶胶的附着力更强，并且形成特定的导热和隔热层，通过石墨的面内定向导热和气凝胶的隔热功能来实现面内快速均热。
Preparation method of graphite-aerogel double-layer even heating film
一种石墨-气凝胶双层均热膜的制备方法
ZHANG SHANGQUAN (author)
2021-08-27
Patent
Electronic Resource
Chinese
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