Strengthened epoxy resin with hyperbranched polyamine-ester anchored graphene oxide via novel phase transfer approach

Abstract

This work investigated the mechanical properties of epoxy resin composites embedded with graphene oxide (GO) using a novel two-phase extraction method. The graphene oxide from water phase was transferred into epoxy resin forming homogeneous suspension. Hyperbranched polyamine-ester (HBPE) anchored graphene oxide (GO HBPE ) was prepared by modifying GO with HBPE using a neutralization reaction. Fourier transform-infrared spectroscopy (FTIR), Raman spectroscopy, X-ray diffraction (XRD), and transmission electron microscopy (TEM) showed that the HBPE was successfully grafted to the GO surface. The mechanical properties and dynamic mechanical analysis (DMA) of the composites demonstrated that GO HBPE played a critical role in mechanical reinforcement owing to the layered structure of GO, wrinkled topology, surface roughness and surface area ascending from various oxygen groups of GO itself, and the inarching of HBPE and the reaction among GO, HBPE, and epoxy resin. The transferred GO HBPE /epoxy resin composites showed 69.1% higher impact strength, 129.1% more tensile strength, 45.3% larger modulus, and 70.8% higher strain compared to that of cured neat epoxy resin. The glass transition temperature (Tg) of GO HBPE /epoxy resin composites was increased from 135 to 141°C and their damping capacity was also improved from 0.71 to 0.91. This study provides guidelines for the fabrication of strengthened polymer composites using phase transfer approach.

Graphene Oxide as a Prospective Graft in Polyethylene Glycol for Enhancing the Toughness of Epoxy Nanocomposites

“…Wang et al studied the flame‐retardant property of epoxy containing a hybrid GO. Hyperbranched polyamine‐ester modified GO was used by Zhang et al to improve the mechanical, thermal, and damping properties of epoxy. Sahu et al modified GO with poly(allyl amine) (PAA) to enhance the mechanical properties of epoxy and observed only an enhancement of 87% in toughness.…”

Improved dielectric permittivity and retained low loss in layer-structured films via controlling interfaces

“…In recent years, enormous attention and research enthusiasm have been devoted to high dielectric (high-k) materials for their wide applications in actuators [1,2], antennas [3], capacitors [4][5][6][7], wave-transparent (or absorbing) devices [8][9][10][11][12][13], and other electronic devices [14][15][16][17][18][19][20][21][22]. Most conventional highk materials are ceramic or ceramic composites, but their applications are seriously restricted by their intrinsic frangibility, high density, poor plasticity, and low breakdown strength.…”

Synthesis of 3,4,5-trihydroxy-2-[(hydroxyimino) methyl] benzoic acid as a novel rust converter

“…Metal corrosion is a serious problem all over the world and therefore a number of methods and materials have been developed to minimize the corrosion processes and environment problems (1)(2)(3)(4)(5)(6). Among the frequently reported protection methods to prevent metal corrosion, such as organic or inorganic coating (7,8), electrochemical protection (9) and corrosion inhibition (10)(11)(12)(13), the most effective and economic technique is the application of coating, particularly anticorrosive coatings (14,15).…”