Electrified single‐walled carbon nanotube/epoxy nanocomposite via vacuum shock technique: Effect of alignment on electrical conductivity and electromagnetic interference shielding

Abstract

Electrified and non‐electrified epoxy‐based nanocomposites holding highly and randomly aligned single‐walled carbon nanotube (SWCNT), respectively, were made by vacuum shock technique, where a DC electric field was used to align SWCNT. The alignment of SWCNTs in the electrified nanocomposites was verified via optical microscopy, SEM analysis, and Raman spectroscopy. Electrical characterization revealed that alignment of SWCNTs led to a significant improvement in electrical conductivity and electromagnetic interference shielding of the fabricated nanocomposites. For instance, the electrical conductivity of the electrified nanocomposites at 0.25 wt% and 0.60 wt% was 2.5 × 10−8 and 5.1 × 10−4 S·m−1, while the conductivity of non‐electrified nanocomposites was 1.1 × 10−11 and 5.6 × 10−5 S·m−1, respectively. With 3.0 mm thickness and 0.60 wt% SWCNT loading, the electrified and non‐electrified nanocomposites showed shielding effectiveness of 12.8 dB and 9.1 dB, respectively. These results revealed that electrification of SWCNT in epoxy‐based nanocomposites improved the level of conductive network formation, thereby enhancing electrical properties of the nanocomposites. POLYM. COMPOS., 39:E1139–E1148, 2018. © 2017 Society of Plastics Engineers

Polyethylenimine-based nanocarriers in co-delivery of drug and gene: a developing horizon

“…For instance, PEI grafted GO exhibited enhanced chemotherapy efficacy towards HeLa cells by sequential delivery of anticancer drugs and siRNA [81, 82] Aldehydes and ketones are similar in reactivity. The development of methods for the chemo selective reduction of aldehydes in the presence of ketones has therefore received considerable attention or by using additives such as thermoplastic, (PET, ABS, SAN), [83-85] nano tube [86, 87] resins [88, 89], graphen oxide  in Polymer composie  For X-ray radiation shielding [90] and and properties of nanocomposites, linear low density polyethylene, ethylene-co-vinyl acetate and nano clay particles by electron beam [91]. …”

Green synthesis of silver nanoparticles toward bio and medical applications: review study

“…What is more, usage of Ag NPs along with practical nanomaterials has attracted considerable attention due to their marvelous electrical conductivity. These kinds of additives can improve the conductivity of various kinds of matrices such as epoxy [106] or be used along with carbon nanotubes [107,108] as fillers for polymeric nanocomposites.…”

Modeling the Electromagnetic Scattering Characteristics of Carbon Nanotube Composites Characterized by 3-D Tomographic Transmission Electron Microscopy

“…Numerous techniques have been developed to fabricate CNT composites while controlling the aforementioned parameters [24]- [28]. In many cases, highly aligned CNTs are desired to improve the overall mechanical and electrical properties of the composite [28]- [30]. The 3D MWCNT composites studied in this work were fabricated using a process similar to the one summarized in Fig.…”