高硅氧玻璃纤维改性泡沫炭复合材料的制备与性能  

Preparation and Properties of High Silica Glass Fiber Modified Carbon Foam Composites

作　　者：赵建伟 王斌 叶子萌 侯林伟 王恒 卜天时 ZHAO Jian-wei;WANG Bin;YE Zi-meng;HOU Lin-wei;WANG Heng;BU Tian-shi(School of Materials Science and Engineering,Xi'an Polytechnie University,Xi'an 710048,Shaanxi,China)

机构地区：[1]西安工程大学材料工程学院,陕西西安710048

出　　处：《合成纤维》2022年第12期60-64,I0011,共6页Synthetic Fiber in China

基　　金：陕西省科技厅重点研发计划项目(2020NY-154);陕西省教育厅重点科学研究计划协同创新中心项目(20JY027);陕西省大学生创新创业训练计划项目(202110709004)。

摘　　要：为了提高传统泡沫炭的力学性能和电磁屏蔽效能,分别以碳纳米管(CNTs)改性酚醛树脂为主要碳源,酚醛空心微球为闭孔相,短切高硅氧玻璃纤维作为添加相,制备了不同高硅氧玻璃纤维含量的多孔泡沫炭复合材料。通过扫描电子显微镜、万能试验机和网络分析仪,研究了玻璃纤维含量对泡沫炭复合材料的微观结构、力学性能、电磁屏蔽效能的影响。结果表明:引入质量分数0.9%的CNTs,泡沫炭复合材料的压缩强度最高,达21.3 MPa,较纯泡沫炭提升了16%;而玻璃纤维的加入并没有明显改善泡沫炭复合材料的压缩强度,但提高了其断裂韧性。质量分数8%的玻璃纤维掺杂泡沫炭复合材料的电磁屏蔽效能最好,在8.2~12.4 GHz下的均值为74 dB,较纯泡沫炭提升了76%。In order to improve the mechanical properties and electromagnetic shielding efficiency of traditional carbon foams,porous carbon foam composites with different contents of chopped glass fibers were prepared,using CNTs modified resin as the main carbon source,phenolic hollow microspheres as closed phase,and chopped high silica glass fibers as fillers.Scanning electron microscope,universal testing machine and network analyzer were employed to investigate the influence of content of chopped high silica glass fibers on the microstructure,mechanical properties and electromagnetic shielding effectiveness of carbon foam composites,respectively.The results show that the carbon foam composites modified by CNTs with a mass fraction of 0.9%exhibite the highest compressive strength,up to 21.3 MPa,which is 16%higher than that of pure carbon foams.Compressive strength of composites can not be improved significantly,while the addition of glass fiber did not significantly improve the compressive strength of carbon foam composites,but increased the fracture toughness.The electromagnetic shielding efficiency of carbon foam composites doped with glass fiber with mass fraction of 8%is the best,the average electromagnetic shielding efficiency is 74 dB at 8.2~12.4 GHz,which is 76%higher than that of pure carbon foam.

关 键 词：高硅氧玻璃纤维 泡沫炭 电磁屏蔽 压缩强度 

分 类 号：TB332[一般工业技术—材料科学与工程]