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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。
Abstract
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.
关键词
碳纳米管
/
环氧树脂
/
复合材料
/
性能
Key words
carbon nanotube
/
epoxy resin
/
composite
/
property
羧基化碳纳米管/环氧树脂复合材料的制备及其性能研究[J].
化工新型材料, 2023, 51(6): 90-93 DOI:10.19817/j.cnki.issn1006-3536.2023.06.017
[1] Iijima S.Helical microtubes of graphific carbon[J].Nature,1991,354:56-58.
[2] Andersson M,Alberius-Henning P,Jansson K,et al.Preparation of carbon nanotubes from CO and in situ formed nano-sized Pd particles[J].Journal of Materials Research,2000,155(8):1822-1827.
[3] Salvetat J P,Briggs G,Bonard J M,et al.Elastic and shear moduli of single-walled carbon nanotube ropes[J].Physical Review Letters,1999,82(5):944-947.
[4] 曹伟,宋雪梅,王波,等.碳纳米管的研究进展[J].材料导报,2007,21(1):77-82.
[5] 张明艳,王晨,吴子剑.碳纳米管-有机化蒙脱土多维纳米界面构筑及其对环氧树脂的增韧机制[J].复合材料学报,2018,35(7):1841-1849.
[6] Tans S J,Verschueren A,Dekker C.Room-temperature transistor based on a single carbon nanotube[J].Nature,1998,393:49-51.
[7] 胡松青,吕强,王志坤.碳纳米管/聚合物复合材料界面结合性能的研究进展[J].复合材料学报,2017,34(1):12-21.
[8] 张昊,蔡佩芝,赵东林,等.碳纳米管增强环氧树脂基复合材料的制备及其力学性能[J].北京化工大学学报(自然科学版),2011,38(1):62-67.
[9] Moniruzzaman M,Du F,Romero N,et al.Increased flexural modulus and strength in SWNT/epoxy composites by a new fabrication method[J].Polymer,2006,47(1):293-298.
[10] 张明艳,王登辉,吴子剑.改性碳纳米管/环氧树脂复合材料的介电性能[J].复合材料学报,2020,37(6):1285-1294.
[11] 于英俊,马传国,蒋杰.碳纳米管改性对环氧树脂复合材料热学和电学性能的影响[J].材料导报,2009,23(14):101-108.
基金资助
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)
