多壁碳纳米管水泥基复合材料电热融冰性能研究

Research on Electrothermal Ice Melting Characteristics of Multi Walled Carbon Nanotube Cement-based Composite Materials

为了研究碳纳米管水泥基复合材料的电热融冰性能,采用碳纳米管掺量为0.05%的水泥基复合材料,研究其不同龄期的电阻率,并进行融冰实验模拟,测试其不同电压和不同试件尺寸下的融冰质量。结果表明:碳纳米管水泥基复合材料的电阻率随着龄期的增大而增大;融冰质量随着试件尺寸和施加电压的增大而增大,给试件施加60 V电压时的融冰质量比无电压时增加48.1%。碳纳米管掺量为0.05%的水泥基复合材料的电热特性受龄期、试件尺寸和电压的影响,外加电压为60 V时材料的融冰性能优良,可以在200 min内融化60 g左右的冰块。

In order to study the electrothermal ice melting characteristics of carbon nanotube cement-based composites,a cement based composite material with a carbon nanotube content of 0.05%was used to experimentally study its electrical resistivity at different ages.Then,ice melting experiments were conducted to simulate and test its ice melting quality under different voltages and specimen sizes.The results show:the electrical resistivity of carbon nanotube cement-based composites increases with age;the quality of ice melting increases with the size of the specimen and the increase of the applied voltage.The ice melting quality increases by 48.1%when a 60 V voltage is applied to the specimen compared to when there is no vol tage.From this,it can be seen that the electric heating characteristic s of cement-based composites with a carbon nanotube content of 0.05%are influenced by age,specimen size,and voltage.When an external voltage of 60 V is applied,the material has the best ice melting ability,which can melt about 60 g of ice within 200 minutes.