Novel functionalization treatment of MWCNTs for unmanned aerial vehicle structure

Abstract

Present typescript encompasses the influences of functionalization on the carbon nanotubes (CNTs) using acid oxidation which has been widely reported not only as a purification process but also as functionalization process because it is an effect on the outer surface on CNTs. Therefore, using strong acid effect and high power sonication in addition to the nature of the acid mixture (H2SO4/HNO3) with CNTs confirm that adequate volume of carboxyl groups decorate the outer surface, this functionalization process improve the dispersibility of the CNT in the response of the final dimension of the CNTs. Because of using a high temperature for a long time more than 6 hours. This work interested in the aspect ratio (L/D) and the final shape of the tubes by using a mild temperature process 50°C with concentration acid for not long time 5 hours, in an attempt to make experimental condition which guarantees good functionalization of the surface of MWNTs with minimizing the CNTs damage, The results were confirmed by Thermogravimetry Analysis (TGA), Raman Spectroscopy, Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) analysis. In addition to the functionalization process we try to save the loss in the weight during the filtration step, in addition to decrease the time during filtration of the materials after sonication. Where the results show that actually functionalization has been done with an adequate amount at this condition, and the dilution for 2 days before filtration have been approved to be easier and faster than direct filtration after treatment.

Mechanical analysis of functionalized MWCNTs reinforced biresin CR82 epoxy nanocomposite materials

“…The functionalization was carried out using a mixture of nitric acid and sulphuric acid as studied in previous work. 13 Peak at 1700–1730 cm −1 was appeared for functionalized sample through FT-IR spectroscopy, which attributed to carbonyl (C = O) and carboxyl (R-COOH) groups stretching vibration. The intensity values of the first two peaks band (ID, and IG) would give a direct indication, if the functional groups were introduced or not by qualified the induced-defect in the sample.…”

Mechanically stable membranes of polyacrylic acid‐grafted chitosan‐functionalized carbon nanotubes with remarkable water storage capacity in sandy soils

“…As seen, weak absorption bands characteristic for the C O stretching vibration of alcohols were observed at 1150 and 1215 cm −1 , as well as the C C and C H stretching vibrational bands at 1555 and 2950 cm −1 , respectively. 55,56 These results indicate the lack of sufficient surface functional groups for grafting and homogenous distribution of pristine MWCNTs into the polymer matrixes. After the oxidation process of MWCNTs, additional adsorption bands were emerged ( Figure 5, spectrum b).…”

Effect of functionalized multi-wall carbon nanotubes/Biresin CR82 epoxy nanocomposite on vibration attenuation of aluminum plate

“…% COOH-MWCNTs had been used after structural damping because of their high stiffness and low weight. The MWCNTs were functionalized with carboxylic groups (-COOH) to improve its dispersibility and interfacial bonding with epoxy resin as seen in our previous work (Alawy et al, 2019). This study aimed to use nanocomposite materials to decrease the undesirable vibration and decrease the stresses created in various applications in which plates are basic parts as discussed in the Introduction section; the rest of this article is sorted out as follows.…”