摘要
首先用混酸法对碳纳米管(CNTs)进行酸化,制得羧基化碳纳米管(C-CNTs)。以C-CNTs作为填料,采用溶剂混合法制备了羧基化碳纳米管/环氧树脂(C-CNTs/EP)复合材料,通过扫描电子显微镜、傅里叶变换红外光谱仪、电子万能试验机、宽频介电阻抗谱仪等对产物进行了表征和分析测试。结果表明:CNTs经羧基化后,长径比相对变小,搭接和缠绕程度相对降低,当C-CNTs质量分数为2%时,C-CNTs/EP复合材料的拉伸强度、弯曲强度、冲击强度分别比EP提高46.1%、27.1%和33.5%;玻璃化转变温度比EP提高8.6℃;当C-CNTs质量分数超过1%,C-CNTs/EP复合材料的介电常数随C-CNTs质量分数的增加而快速增大。
Carboxylated carbon nanotubes(C-CNTs)was obtained through mixed acid method,and then the C-CNTs/EP composite was prepared by solution blending using C-CNTs as fillers.The products were characterized and analyzed by scanning electron microscope,Fourier transform infrared spectrometer,electronic universal testing machine and broadband dielectric impedance spectrometer.The results showed that after carboxylation,the length to diameter ratio of CNTs was reduced,and lapping and twist degree also decreased.The tensile,bend and impact strength of the composite were 46.1%,27.1%and 33.5%higher than those of EP,respectively,and the glass transition temperature of the composite was increased by 8.6℃ compared to EP when the mass fraction of C-CNTs was 2%.When mass fraction of C-CNTs exceeded 1%,the dielectric constants of C-CNTs/EP composite increased fastly with the increase of C-CNTs mass fraction.
作者
赵阳
张永明
贺泽民
苗宗成
赵玉真
Zhao Yang;Zhang Yongming;He Zemin;Miao Zongcheng;Zhao Yuzhen(Xi'an Key Laboratory of Advanced Photo-Electronics Materials and Energy Conversion Device,School of Electronic Information,Xijing University,Xi'an 710123)
出处
《化工新型材料》
CAS
CSCD
北大核心
2023年第6期90-93,共4页
New Chemical Materials
基金
陕西省自然科学基础研究计划项目(2021JM-536、2021GY-205)
西京学院高层次人才基金(XJ21B02,XJ21B04)。
