Surface Modification of Sulfur-Assisted Reduced Graphene Oxide with Poly(phenylene sulfide) for Multifunctional Nanocomposites

Abstract

The sulfur on the sulfur-assisted reduced graphene oxide (SrGO) surface provides the origin of poly(phenylene sulfide) PPS-grafting via SNAr mechanism. In-situ polymerization from sulfur on SrGO afforded surface modification of SrGO, resulting in enhanced dispersibility in PPS. The tensile strength, electrical and thermal conductivities, and flame retardancy of PPS-coated SrGO were efficiently enhanced using highly concentrated SrGO and masterbatch (MB) for industrial purposes. Three-dimensional X-ray microtomography scanning revealed that diluting MB in the PPS resin afforded finely distributed SrGO across the PPS resin, compared to the aggregated state of graphene oxide. For the samples after dilution, the thermal conductivity and flame retardancy of PPS/SrGO are preserved and typically enhanced by up to 20%. The proposed PPS/SrGO MB shows potential application as an additive for reinforced PPS due to the ease of addition during the extrusion process.

Preparation and Properties of Boron Nitride or Aluminum Nitride Reinforced Glass Fiber/Modified Polyphenylene Sulfide Composites

“…A simple and effective strategy for improving the thermal conductivity of polymers is the addition of high thermal conductivity fillers [9][10][11][12], such as silicon carbide [13,14], alumina [15], boron nitride (BN) [16][17][18][19], aluminum nitride (AlN) [20,21], carbon nanotubes [22,23], graphene [24][25][26], entering the polymer matrix to form thermal conductivity paths and networks to enhance thermal conductivity [27]. Among these fillers, BN and AlN are widely used due to their excellent thermal conductivity and insulation.…”