Smoleń Paweł, Czujko Tomasz, Komorek Zenon, Grochala Dominik, Rutkowska Anna, Osiewicz-Powęzka Małgorzata
Institute of Materials Science and Engineering, Military University of Technology, Gen. Sylwestra Kaliskiego Str. 2, 00-908 Warsaw, Poland.
Smart Nanotechnologies S.A., Karola Olszewskiego Str. 25, 32-566 Alwernia, Poland.
Materials (Basel). 2021 Jun 16;14(12):3325. doi: 10.3390/ma14123325.
This paper investigates the effect of multiwalled carbon nanotubes on the mechanical and electrical properties of epoxy resins and epoxy composites. The research concerns multiwalled carbon nanotubes obtained by catalytic chemical vapor deposition, subjected to purification processes and covalent functionalization by depositing functional groups on their surfaces. The study included the analysis of the change in DC resistivity, tensile strength, strain, and Young's modulus with the addition of carbon nanotubes in the range of 0 to 2.5 wt.%. The effect of agents intended to increase the affinity of the nanomaterial to the polymer on the aforementioned properties was also investigated. The addition of functionalized multiwalled carbon nanotubes allowed us to obtain electrically conductive materials. For all materials, the percolation threshold was obtained with 1% addition of multiwalled carbon nanotubes, and filling the polymer with a higher content of carbon nanotubes increased its conductivity. The use of carbon nanotubes as polymer reinforcement allows higher values of tensile strength and a higher strain percentage to be achieved. In contrast, Young's modulus values did not increase significantly, and higher nanofiller percentages resulted in a drastic decrease in the values of the abovementioned properties.
本文研究了多壁碳纳米管对环氧树脂及环氧复合材料的力学性能和电学性能的影响。该研究涉及通过催化化学气相沉积法获得的多壁碳纳米管，这些碳纳米管经过了纯化过程，并通过在其表面沉积官能团进行共价功能化。该研究包括分析在添加0至2.5 wt.%范围内的碳纳米管时，直流电阻率、拉伸强度、应变和杨氏模量的变化。还研究了旨在提高纳米材料与聚合物亲和力的试剂对上述性能的影响。添加功能化多壁碳纳米管使我们能够获得导电材料。对于所有材料，添加1%的多壁碳纳米管时达到了渗流阈值，用更高含量的碳纳米管填充聚合物会提高其导电性。使用碳纳米管作为聚合物增强材料能够实现更高的拉伸强度值和更高的应变百分比。相比之下，杨氏模量值没有显著增加，更高的纳米填料百分比导致上述性能值急剧下降。
