Transparent anhydride–cured epoxy nanocomposites reinforced with polyaniline stabilized nanosilica

Abstract

Transparent anhydride-bisphenol-A epoxy systems filled with pristine nanosilica were prepared and compared with the counterparts with the nanosilica coated with surface initiated polymerization (SIP) prepared phosphoric acid (H 3 PO 4 ) doped polyaniline (PANI). The rheological investigation on the bisphenol-A epoxy nanosuspensions demonstrated that the surface coating increased the interaction between the nanosilica and the resin matrix. The tensile strength of anhydride-epoxy (83.79 MPa) was increased to 87.00 and 88.78 MPa for the epoxy with the as-received and functionalized nanosilica, respectively. The real permittivity of the nanocomposites was increased after the introduction of PANI functionalized nanosilica. The H 3 PO 4 doped PANI decreased the heat release rate of epoxy from 563.0 to 508. 3 W g À1 , confirming the fire retardancy behavior of the PANI coating. The obtained cured anhydride-epoxy nanocomposites filled with nanosilica are highly transparent in visible light, and have potential applications in the optical field.Scheme 2 Curing process of the anhydride-epoxy system with an accelerator. View Article Online a DER epoxy cured using the following procedure: 90 1C B2 h, 120 1C B2 h, 150 1C B5 h. b DER epoxy cured using the following procedure: 100 1C B3 h, 140 1C B6 h.

Flexible hollow nanofibers: Novel one-pot electrospinning construction, structure and tunable luminescence–electricity–magnetism trifunctionality

“…Wang et al [31] prepared Fe 2 O 3 /[Eu(DBM) 3 (Bath)] (DBM = dibenzoylmethanate, Bath = bathophenanthroline)/PVP m agnetic-photoluminescent bifunctional composite nanofibers. Polyaniline (PANI) is one of the most important conducting polymers due to its high conductivity, good processibility and environmental stability, as well as its potential for a variety of applications [32][33][34][35][36][37][38][39][40][41]. Huang et al [42] synthesized Fe 3 O 4 /PANI composite nanofibers via micro-emulsion polymerization of aniline in the presence of Fe 3 O 4 NPs.…”

Fabrication of Novel Printable Electrically Conductive Adhesives (ECAs) with Excellent Conductivity and Stability Enhanced by the Addition of Polyaniline Nanoparticles

“…Therefore, PANI composites showed growing potential in such applications as thermoelectric materials [27], conductive materials [28], supercapacitors materials [29], and electromagnetic interference shielding materials [30]. Besides, PANI could also serve as the coupling agent to improve the thermal, mechanical, and flame retardant properties of epoxy resin [31,32,33,34]. However, epoxy resin is the most-common adhesive used in ECAs due to its excellent bonding property, good environmental resistance, and excellent thermal properties [12,13].…”

Enhanced dispersion and properties of a two-component epoxy nanocomposite using surface modified cellulose nanocrystals

“…Nanocomposites of epoxy utilizing various types of fillers can improve the mechanical, thermal, and electrical properties of neat epoxy resin. [39][40][41][42] There have been several previously reported CNC/epoxy nanocomposite studies utilizing some of the strategies stated above. [27,28,34,[43][44][45][46][47] However, there has not been a study that explores the effect of CNC surface modification on the dispersion and final properties of epoxy nanocomposite.…”