摘要
为了解决碳纤维流散性不理想的问题,提升碳纤维烟幕材料的分散效果,利用粉体综合特性测试仪对比测试石墨、长度分别为18μm、1.5 mm的碳纤维原材料的流动性指数和喷流性指数,并通过添加流散剂的物理方式和表面包覆SiO_(2)的化学方式对长度分别为18μm、1.5 mm的有胶碳纤维进行改性。结果表明:长度分别为18μm、1.5 mm的碳纤维在有胶或无胶状态下的流散性能均未达到理想值;经过添加流散剂的物理改性方式能够显著且有效地提高长度分别为18μm、1.5 mm的有胶碳纤维的流散性能,其流动性指数和喷流性指数随着流散剂含量增加而不断增大;经过表面包覆SiO_(2)的化学改性方式良好地改善长度为18μm的有胶碳纤维的流散性能,但由于液体表面张力的影响未能有效提升长度为1.5 mm的有胶碳纤维的流散性能。
In order to solve the problem of poor fluidity of carbon fiber and improve the dispersion effect of carbon fiber smoke screen material,the fluidity index and jet index of graphite,18μm carbon fiber and 1.5 mm carbon fiber were compared by using the powder comprehensive characteristic tester.Then,18μm and 1.5 mm glued carbon fibers were modified by adding dispersant and coating SiO_(2).The results show that the dispersion properties of 18μm and 1.5 mm carbon fibers with or without glue don’t reach the ideal value.Physical modification by adding dispersant can significantly and effectively improve the dispersibility of 18μm and 1.5 mm glued carbon fibers,and its fluidity index and jet index increase with the increase of dispersant content.The chemical modification method by coating with SiO_(2) can improve the dispersion performance of 18μm bonded carbon fiber,but it can’t effectively improve the dispersion performance of 1.5 mm bonded carbon fiber due to the influence of liquid surface tension.
作者
孙悦悦
王玄玉
董文杰
姚伟召
刘志龙
SUN Yueyue;WANG Xuanyu;DONG Wenjie;YAO Weizhao;LIU Zhilong(Pyrotechnic Department,Institute of NBC Defense of PLA Army,Beijing 102205,China)
出处
《中国粉体技术》
CAS
CSCD
2022年第3期44-49,共6页
China Powder Science and Technology
基金
装备预研项目,编号:30110020502。
关键词
碳纤维
流散性能
流散剂
表面包覆
改性
carbon fiber
dispersion performance
dispersant
surface coating
modification
