Nanocomposites based on plasma-polymerized carbon nanotubes and Nylon-6

Abstract

Unique properties of carbon nanotubes (CNTs) and Nylon-6 were combined to obtain nanocomposites through in situ polymerization. For this purpose, plasma-polymerized CNTs (CNTM) and raw CNTs were added to in situ polymerization of e-caprolactam and 6-aminocapropic acid to obtain nanocomposites with 2 and 4% wt/wt of nanotubes. The morphology, phase transitions, thermal stability, dispersion and electrical conductivity were investigated for all samples. Scanning electron microscopy images showed a homogeneous dispersion of CNTs; however, dispersion is known to be better in nanocomposites with CNTM. Furthermore, the crystallization temperature increased up to 50 1C, the melting temperature increased by 20 1C and the degradation temperature increased up to 70 1C for a 10% weight loss. This behavior suggests a synergistic effect for these nanocomposites. The electrical conductivity of nanocomposites with 4% wt/wt reached a maximum of 10 À4 S cm À1 , suggesting a semiconductive material. Finally, the method used in this work is effective for the dispersion of CNTs, and it can be used to form nanocomposites with improved properties compared with the Nylon-6 homopolymer.

A Multi‐Walled Carbon Nanotube Core with Graphene Oxide Nanoribbon Shell as Anode Material for Sodium Ion Batteries

“…The absence of these bands in the spectrum of MWCNT@GONR‐900 °C indicates successful removal of COOH group by the annealing step under argon. The aromatic CC stretch is observed at around 1582 cm −1 in the spectra of MWCNT@GONRs and 1635 cm −1 in the spectra of MWCNT . This shift might due to the changes in the MWCNT structure after unzipping processes…”

On-Demand Gas-to-Liquid Process To Fabricate Thermoresponsive Antimicrobial Nanocomposites and Coatings

“…The other bands between 800 and 1000 cm –1 could be explained as superimpositions between various SiO 2 peaks and Si–OH bonds. Meanwhile, CNTs mostly showed featureless spectrum in the tested IR range and demonstrated only a broad minor peak at around 1770 cm –1 , which was attributable to a CO vibration; these results were consistent with the spectra in a previous report . In Figure S2b, the bands for Ag-CNT@TRP and Ag-SP@TRP samples showed some vibration bands of Si–O, which were due to the presence of PDMS in TRP.…”

“…Meanwhile, CNTs mostly showed featureless spectrum in the tested IR range and demonstrated only a broad minor peak at around 1770 cm −1 , which was attributable to a CO vibration; these results were consistent with the spectra in a previous report. 35 In Figure S2b, the bands for Ag-CNT@TRP and Ag-SP@TRP samples showed some vibration bands of Si−O, which were due to the presence of PDMS in TRP. The spectra of both nanocomposites showed −CH 2 groups (1460 cm −1 ) and NH−CO groups (1550 cm −1 ) of PNIPAM, thereby implying that both supporting SNPs and CNTs were well incorporated with TRP during the ultrasonic reactions.…”

Toward Greener Chemistry Methods for Preparation of Hybrid Polymer Materials Based on Carbon Nanotubes

“…Regarding to preparation of polymer-CNTs hybrid materials, unlike microwaves and ultrasound technologies described earlier, plasma is mainly used for functionalization of CNTs in order to later use them in the preparation of hybrid materials by in-situ polymerization [52,53] and melt blending [54]. As described before, the surface modification of CNTs leads to improve the dispersion and interactions between CNTs and polymer matrix and represent a critical issue to enhance properties of polymer-CNTs hybrid materials; thus, this section is focused on the role of plasma-CNTs interactions in the functionalization of CNTs by polymer grafting, in order to exploit more efficiently the unique properties of CNTs (Green principles # 2, 6).…”