π‐Plasmon absorbance films of carboxylic functionalized CNTs coupled with renewable PGP platforms

Abstract

π‐Plasmon absorbance films of carboxylic functionalized multiwall carbon nanotubes (CNTs) coupled with renewable and recycled polycaprolactone grafted pectin (PGP) platforms as successful alternative for ordinary nondegradable platforms were investigated. Characterization of the synthesized carboxylic functionalized CNTs was performed using 1H NMR and attenuated total reflectance Fourier transform infrared for structural identification, thermogravimetric analysis and derivative thermogravimetric analysis for thermal stability, and X‐ray powder diffraction for crystal structure, whereas the characterization of prepared PGP was done by means of attenuated total reflectance Fourier transform infrared for chemical structure, differential scanning calorimetry for melting endotherms of polycaprolactone and high crystalline structure of PGP, and thermogravimetric analysis and derivative thermogravimetric analysis for thermal stability of PGP. Fabrication of water‐dispersed carboxylic functionalized CNTs coupled with PGP films was performed by casting technique in the presence of Ca2+ as cross‐linker. The thin films were tested for π‐plasmon absorbance using UV‐Vis spectrometry. Different fractions of carboxylic functionalized CNTs and PGP films demonstrated π‐plasmon absorbance broad peaks at λmax = 232 nm, which corresponded to 5.36 eV. The fabrication of novel films from renewable recycled PGP platform and advanced carboxylic functionalized CNTs properties will be the key features for many of next forthcoming technologies. The PGP considered as environment‐friendly and easily degradable platforms will be a successful alternative for conventional nondegradable electronic platforms, and water‐dispersed carboxylic functionalized CNTs with advanced properties will be finding accelerating executive applications.

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“…240 nm result from the excitation of the π-electron systems which are apparent in all sp 2 hybridised carbon materials [29]. In agreement with the results presented in this study, the relative increase in peak absorbance of the C-MWNCT in comparison to the MWCNTs was also determined in other work [30,31]. It was suggested that the increase in absorbance for the C-MWCNTs occurred due to the π-plasmon bands resonating free electrons in the C-MWCNT structures.…”

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“…The increment in the intensity of peaks for O-CNTs was attributed to successful oxidation process, and similar peak angles for CNTs and O-CNTs demonstrate that the crystal structure was not affected by the oxidation process. 43 Our nanohybrid GO-OCNTs show two diffraction peaks 24.7 and 42.9 regardless of the ratio of GO to OCNTs (Fig. 4E).…”

“…Similarly, in a separate tube, 500 mg of oxidized carbon nanotubes (O-CNTs) was dispersed in 150 mL of 2.5% Tween-80 surfactant solution at 70 C to make waterdispersed CNT solution. 43 The water-dispersed solutions of GO and O-CNTs were mixed and slowly dropped in a calcium chloride solution to make 2% CaCl 2 concentration under 100 rpm stirring. For complete nucleation of the nanohybrid sample, the mixture was le stirring overnight at ambient temperature.…”

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“…The increase in the intensity of peaks for O-CNTs provides evidence for the successful oxidation process, and the identical peak angles for O-CNTs and CNTs prove that the crystal structure is not affected by the oxidation process. 50 Nanohybrid GO/O-CNTs shows two peaks at 24.7 and 42.9°, regardless of the ratio of GO to O-CNTs. These diffraction peaks correlate with the (002) and (100) crystal planes.…”

“…Similarly, in a separate tube, 0.5 g of oxidized carbon nanotubes (O-CNTs) was dispersed in 150 mL of 2.5% Tween 80 surfactant solution at 70 °C to make a water-dispersed CNT solution. 50 The dispersed solutions of GO and O-CNTs were slowly mixed and added dropwise into a CaCl 2 solution to make 2% CaCl 2 concentration under stirring (100 rpm). For complete nucleation of the nanohybrid sample, the mixture was left stirring overnight at ambient temperature.…”