高导热石墨烯/萘甲醇复合薄膜的制备及其在LED上的应用

Preparation of graphene/naphthalene methanol composite film with high thermal conductivity and its potential in LED

石墨烯由于具有超高的导热性能,在热管理上有着广阔的应用前景。从修复结构缺陷出发,以氧化石墨烯为原料,有机小分子萘甲醇为修复剂,采用蒸发自组装法制备氧化石墨烯/萘甲醇(GO/NMT)复合薄膜,然后经过高温石墨化得到石墨化–石墨烯/萘甲醇(g-GO/NMT)薄膜。通过SEM、FT-IR、XRD、拉曼对制备的复合薄膜进行结构分析,并对其导热性能进行测试,当NMT的添加量为15%时,薄膜热导率达856.476 W/(m·K),比石墨化–石墨烯(g-GO)薄膜的热导率提高了35%;通过对商用LED灯芯实际散热进行测试,g-GO膜的表面温度高达33.7℃,而g-GO/NMT复合膜的温度较低,仅为31.5℃。研究结果表明,g-GO/NMT复合膜具有更好的散热性能和更有效的热管理能力。

Graphene has broad application prospects in thermal management due to its ultra-high thermal conductivity.In order to repair the structural defects,graphene oxide/naphthalene(GO/NMT)methanol composite films were prepared by evaporation self-assembly method with graphene oxide as raw material and naphthalene methanol as repair agent.Graphitized-graphene/naphthalene methanol(g-GO/NMT)films were prepared by high temperature graphitization.The structure of the composite film was analyzed by SEM,FT-IR,XRD and Raman.When the addition of NMT was 15%,the thermal conductivity of the film was 856.476 W/(m·K),which was 35%higher than that of g-GO film.The actual heat dissipation test of commercial LED wick showed that the surface temperature of g-GO film was as high as 33.7℃,while the temperature of g-GO/NMT composite film was 31.5℃.The results show that g-GO/NMT composite film has better heat dissipation performance and more effective heat management ability.