摘要
石墨烯作为二维纳米碳质材料,具有超高的载流子迁移率、在非极性溶剂中具有良好的溶解性等优点。本文通过超声-固相剪切法以乙醇为有机溶液剥离膨胀石墨制备石墨烯,通过XRD、SEM、AFM的表征得到了片层大小约为20μm左右、厚度为4.7nm左右、层数在10层以下的石墨烯,并制备出水基/石墨烯导电油墨和电热膜,探究了电热膜宽度和厚度对发热效果的影响。结果表明:当其他条件不变,发热膜的宽度在140mm时,单个发热膜整体电阻的最低值;当长度和宽度一定时,发热膜厚度达到0.906mm后发热体的方阻趋于不变;单个发热体尺寸为140mm×200mm×0.906mm,其方阻约为21.8Ω/sq,整体平均阻值约为31.2Ω,在5V的直流电压下,加热30s,发热均匀恒温42℃。
Graphene,as a two-dimensional carbon nano material,has the advantages of ultra-high carrier mobility and good solubility in non-polar solvents.Graphene was prepared by exfoliating expanded graphite with ethanol as organic solution by ultrasonic solid-state shear method.Graphene with sheet size of about 20μm,thickness of about 4.7 nm and layers of less than 10 layers were obtained by XRD,SEM and AFM.The aqueous dispersion/graphene conductive ink and electrothermal film were prepared.The influence of the width and thickness of the electrothermal film on the heating effect was investigated.The results show that:when other conditions remain unchanged,when the width of the heating film is 140 mm,the overall resistance of a single heating film is the lowest;when the length and width of the heating film are fixed,the square resistance of the heating element tends to be unchanged when the thickness of the heating film reaches 0.906 mm;the size of the single heating body is 140 mm×200 mm×0.906 mm,the square resistance is about 21.8Ω/sq,and the overall average resistance is about 31.2Ω.Under the voltage of 5V,the heating temperature is 30℃s.The heating is uniform and the constant temperature is 42℃.
作者
王龑
孙嘉豪
李博
于淼
WANG Yan;SUN Jia-hao;LI Bo;YU Miao(School of materials science and engineering,Heilongjiang University of science and technology,Harbin 150027,China)
出处
《世界有色金属》
2020年第12期240-242,共3页
World Nonferrous Metals
基金
2019年黑龙江省大学生创业训练项目基金(《便携式石墨烯智能发热坐垫》)201910219025。
关键词
石墨烯
电热膜
超声-固相剪切法
方阻
Graphene
Electrothermal film
Ultrasonic-solid shear method
Square resistance
