Structure and Mechanical Performance of Poly(vinyl Alcohol) Nanocomposite by Incorporating Graphitic Carbon Nitride Nanosheets

Abstract

Owing to the high aspect ratio, the two-dimensional (2D) inorganic nanofillers have attracted extensive interest in the field of polymer reinforcement. In this work, graphitic carbon nitride (g-C3N4) nanosheets were obtained via thermal condensation of melamine and were then ultrasonically exfoliated in water, which was confirmed by atomic force microscopy (AFM) and TEM. Poly(vinyl alcohol) (PVA)/g-C3N4 nanocomposites were achieved by solution casting using water as the solvent. The structure and mechanical performance of PVA/g-C3N4 nanocomposites were studied. It was found that the g-C3N4 nanosheets were well dispersed in the PVA matrix. The introduction of g-C3N4 nanosheets increased the glass transition temperature and crystallinity of the nanocomposites, leading to the improved mechanical performance. Compared with the pure PVA, the PVA/g-C3N4 nanocomposite with 0.50 wt% g-C3N4 nanosheets showed ~70.7% enhancement in tensile strength, up from 51.2 MPa to 87.4 MPa.

Graphitic carbon nitride and polymers: a mutual combination for advanced properties

“…Lin and coworker fabricated g-C 3 N 4 /poly(vinyl alcohol) (PVA) nanocomposites by solution casting using water as solvent, demonstrating that the g-C 3 N 4 could be well dispersed in PVA matrix. 169 The introduction of g-C 3 N 4 nanosheets increased the glass transition temperature and crystallinity of the nanocomposites, leading to improved mechanical performance with B71% enhancement of tensile strength. 169 Very recently, Guo and coworkers synthesized g-C 3 N 4 on carbon fiber surfaces in situ in order to enhance interfacial properties of carbon fiber reinforced epoxy resin composites.…”

“…169 The introduction of g-C 3 N 4 nanosheets increased the glass transition temperature and crystallinity of the nanocomposites, leading to improved mechanical performance with B71% enhancement of tensile strength. 169 Very recently, Guo and coworkers synthesized g-C 3 N 4 on carbon fiber surfaces in situ in order to enhance interfacial properties of carbon fiber reinforced epoxy resin composites. 170 The g-C 3 N 4 on the carbon fiber surface greatly increased the roughness, the content of polar functional groups and wettability of carbon fibers.…”

Enhancement of physico-chemical, optical, dielectric and antimicrobial properties of polyvinyl alcohol/carboxymethyl cellulose blend films by addition of silver doped hydroxyapatite nanoparticles

“…Polymer nanocomposites are one of the most important materials in the academic and industrial areas, and are produced by dispersing nanofillers with one or more dimensions at nano-scale into the polymeric matrix [1]. Recently, researchers have been attracted to polymer nanocomposites over conventional microcomposites due to their wide applications in electromechanical systems and their large interfacial area per unit volume of the dispersion medium [2].…”

Bio-Based Eucommia ulmoides Gum Composites with High Electromagnetic Interference Shielding Performance

“…In order to avoid these issues, many novel materials with high EMI shielding performance were explored with the aim of addressing problems related to EMI and radiation [ 7 ]. Conductive polymer composites (CPCs) consisting of polymer and conductive fillers were explored as promising alternative EMI shielding materials; these materials are generally metal-based materials [ 8 , 9 , 10 , 11 , 12 ]. Research on CPCs was motivated by their low weight, flexibility, resistance to corrosion and good processability [ 13 , 14 , 15 , 16 ].…”