Polymer nanocomposite

About: Polymer nanocomposite is a research topic. Over the lifetime, 8977 publications have been published within this topic receiving 297599 citations.

Fabrication of two-dimensional hybrid sheets by decorating insulating PANI on reduced graphene oxide for polymer nanocomposites with low dielectric loss and high dielectric constant

Abstract: Novel polyaniline decorated reduced graphene oxide (rPANI@rGO) two-dimensional (2D) hybrids sheets were successfully prepared by in situ polymerization of aniline on graphene oxide (GO) sheets and successive reduction by hydrazine. PANI is heavily reduced, thus it is electrically insulating. The hybrid sheets were used as a novel filler for high performance poly(methyl methacrylate) (PMMA) nanocomposites. Our results show that, when compared with the PMMA/rGO composites, the PMMA/rPANI@rGO nanocomposites not only show a high dielectric constant but also have low dielectric loss. For example, at 1000 Hz, a dielectric constant of 40 and a dielectric loss of 0.12 were observed in the PMMA/rPANI@rGO nanocomposite with rGO/PMMA volume ratio of 6%, whereas the dielectric constant and dielectric loss of PMMA/rGO composite with rGO/PMMA volume ratio of 6% are about 20 and 1250, respectively. More importantly, the dielectric properties of PMMA/rPANI@rGO nanocomposites can be tuned by controlling the addition of the hybrid sheets. The improved dielectric properties in PMMA/rPANI@rGO nanocomposites should originate from the isolation effect of rPANI on the rGO in PMMA matrix, which not only improves the dispersion of rGO but also hinders the direct electrical contact between rGO. This research sets up a novel route to polymer composites with high dielectric constants and low dielectric loss, and also expands the application space of graphene-based fillers.

Ultraviolet‐Assisted Direct‐Write Fabrication of Carbon Nanotube/Polymer Nanocomposite Microcoils

Abstract: [*] Prof. D. Therriault, L. L. Lebel Laboratory of Multi-scale Mechanics, Center for Applied Research on Polymers (CREPEC) École Polytechnique of Montreal C.P. 6079, succ. Centre-Ville, Montreal, QC H3C 3A7 (Canada) E-mail: daniel.therriault@polymtl.ca B. Aissa, Prof. M. A. E. Khakani Institut National de la Recherche Scientifique, INRS-Énergie, Matériaux et Télécommunications 1650 Blvd. Lionel-Boulet, Varennes, QC J3X 1S2 (Canada)

Mechanically robust, electrically conductive and stimuli-responsive binary network hydrogels enabled by superelastic graphene aerogels.

Abstract: The architecture of the nanofiller phase in polymer nanocomposites matters! Polymer hydrogels that can combine stimuli-responsiveness with excellent electrically conductivity and mechanical strength can be fabricated by incorporation of the polymer into an ultralight and superelastic graphene aerogel to form a binary network.

Mechanical properties and tensile fatigue of graphene nanoplatelets reinforced polymer nanocomposites

Abstract: Graphene nanoplatelets (GNPs) are novel nanofillers possessing attractive characteristics, including robust compatibility with most polymers, high absolute strength, and cost effectiveness. In this study, GNPs were used to reinforce epoxy composite and epoxy/carbon fiber composite laminates to enhance their mechanical properties. The mechanical properties of GNPs/epoxy nanocomposite, such as ultimate tensile strength and flexure properties, were investigated. The fatigue life of epoxy/carbon fiber composite laminate with GPs-added 0.25 wt% was increased over that of neat laminates at all levels of cyclic stress. Consequently, significant improvement in the mechanical properties of ultimate tensile strength, flexure, and fatigue life was attained for these epoxy resin composites and carbon fiber-reinforced epoxy composite laminates.

An organic cathode material based on a polyimide/CNT nanocomposite for lithium ion batteries

Abstract: In this paper, a 3,4,9,10-perylenetetracarboxylic dianhydride/carbon nanotube (PTCDA/CNT) nanocomposite and its corresponding polymer nanocomposite poly(3,4,9,10-perylenetetracarboxylic dianhydride ethylene diamine)/carbon nanotube (PI/CNT) were produced, which could be used as organic cathode materials for lithium ion batteries. Compared with PTCDA, PTCDA/CNT exhibited an enhanced rate capability, and the capacity was increased from 10 mA h g−1 to 115 mA h g−1 at 2 C. Polymerization can further increase the cycling stability of organic cathode materials. The capacity of the polymer nanocomposite PI/CNT remained at 93% after 300 cycles under a current of 100 mA g−1, while the capacity of PTCDA/CNT was only 74% after 300 cycles. The improved electrochemical properties of these materials were ascribed to increased electronic conductivity of PTCDA due to the formation of composites with CNTs, and their decreased solubility in the electrolyte due to polymerization.