苯乙烯丙烯酸树脂为墨粉主要组分，其导热性能提升可显著提高墨粉导热性能，进而延长打印、复印机使用寿命。通过在苯乙烯丙烯酸树脂中添加碳纳米管、石墨烯高导热单一或复合填料，在苯乙烯丙烯酸树脂构建连通导热网络以提高其导热性能。当苯乙烯丙烯酸树脂中添加0.75wt%多壁碳纳米管时，其导热系数可提高至0.1644 W/(m?K)，增幅为31.31%；添加1.0wt%羧基改性多壁碳纳米管时，苯乙烯丙烯酸树脂导热系数可提高至0.1751 W/(m?K)，增幅为39.86%；在苯乙烯丙烯酸树脂添加多壁羧基改性碳纳米管和石墨烯混合填料时，苯乙烯丙烯酸树脂导热系数可提升至0.2093 W/(m?K)，增幅达到67.17%。表明碳纳米管和石墨烯混合填料可在苯乙烯丙烯酸树脂中形成有效的导热网络，从而显著提高苯乙烯丙烯酸树脂导热性能。

Styrene acrylic resin is the main component of toner. The thermal conductivity of toner could be improved significantly by increasing the thermal conductivity of styrene acrylic resin. Then, the life of printer and copier could be extended. By adding single or hybrid high thermal conductivity fillers of carbon nanotubes and graphene into styrene acrylic resin, a connected thermal conductivity network was constructed in styrene acrylic resin to improve the thermal conductivity. When 0.75wt% multi-walled carbon nanotubes (MWCNTs) were added into styrene acrylic resin, the thermal conductivity of styrene acrylic resin composite was increased from 0.1252 W/(m?K) to 0.1644 W/(m?K) with an increasing of 31.31%. When 1.0wt% MWCNTs-COOH was added into styrene acrylic resin, the thermal conductivity of styrene acrylic resin composites was increased to 0.1751 W/(m?K) with an increasing of 39.86%. When MWCNTs-COOH and graphene were added into styrene acrylic resin, the thermal conductivity of styrene acrylic resin composites was increased to 0.2093 W/(m?K) with increasing of 67.17%, which indicated the hybrid fillers (MWCNTs-COOH and graphene) formed connected thermal conductivity network in styrene acrylic resin. Thus, the thermal conductivity of styrene acrylic resin composite was improved significantly.