用羟乙基纤维素(HEC)改善短碳纤维的分散性

实验采用HEC作为分散剂,采用旋转搅拌方式在其水溶液中对短碳纤维进行分散.对HEC的质量浓度、搅拌速度及搅拌时间对短碳纤维分散率的影响进行了研究,通过SEM表征了短碳纤维在分散前后的镀铜效果.结果表明:短碳纤维经HEC分散后,分散性明显改善.HEC在水中的浓度要适中,过高或过低,短碳纤维的分散效果不显著;搅拌速度的提升和分散时间的延长会提高短碳纤维的分散率.当HEC质量浓度为1.5 g/L,搅拌速度为800 r/min,搅拌时间为30 min时,短碳纤维的分散率达到98%.分散处理过的短碳纤维镀铜层更加完整均匀,无黑心现象.

Improvement of Dispersibility of Short Carbon Fibers by Hydroxyethl Cellulose(HEC)

Using HEC as a dispersant,the short carbon fibers were dispersed by rotary stir.The effects of HEC concentration,stirring speed and stirring time on short carbono fibers were studied.The microstructure of copper coating before and after dispersion of short carbon fibers was characterized by SEM.The results showed that after dispersion treatment,the dispersibility of short carbon fibers is significantly improved.The concentration of HEC in the water must keep moderate.The dispersion of short carbon fibers is not obvious when the concentration of HEC is too high or too low in the water.The dispersion ratio of short carbon fibers increases with the increasing stirring speed and time.When the stirring speed is controlled at 800 r/min and the stirring time is 30 minutes,the dispersion ratio of short carbon fibers rises to 98% at HEC concentration of 1.5 g/L.Copper coating layers of dispersed carbon fibers turn to smooth and uniform.