有机相变蓄冷材料中碳纳米管添加剂性能实验研究

针对有机相变蓄冷材料导热系数低、传热性能差的缺点,采用向其中添加碳纳米管,通过超声分散法及添加分散剂制备稳定分散液来改善其导热性能。对分散剂的种类、碳纳米管的质量浓度、超声时间和分散剂的浓度对碳纳米管分散稳定性的影响及添加碳纳米管对导热性能的影响进行了实验研究。研究结果表明,分散剂对碳纳米管悬浮液的稳定性具有关键作用,十二烷基苯磺酸钠(SDBS)是一种比较理想的分散剂,碳纳米管稳定分散悬浮液的最佳制备条件为:碳纳米管质量浓度0.4 g/L;分散剂SDBS质量浓度0.2 g/L;超声时间80 min。通过在有机相变蓄冷材料加入碳纳米管可以有效增大其导热系数。

Experimental Study on the Performance of Organic Phase - Change Cold Storage Material with Carbon Nanotube Additives

According to the shortcomings of low thermal conductivity and poor heat transfer performance of the organic phase- change cold storage material, stable carbon nanotube suspension was prepared using ultrasound dis- persing method and adding dispersant to improve the heat conduction performance. Experimental study on the effects of the type of dispersants, carbon nanotube mass concentration, ultrasonic time and dispersant mass concentration of carbon nanotube dispersion stability and the effect of adding carbon nanotube on thermal conductivity enhancement was taken in this paper. The results of the study show that, dispersant plays a key role on carbon nanotubes suspension stability, and the sodium dodecyl benzene sulfonate （SDBS） is an ideal dispersant. The optimal preparation conditions for carbon nanotubes dispersed suspension are： carbon nanotube mass concentration of 0.4 g/L; dispersant mass concentration of SDBS 0.2 g/L; ultrasonic time of 80 min. The carbon nanotube additives can effectively increase the coefficient of heat conductivity of the organic phase - change material for cold storage.