Effect of Graphene Modification on Thermo-Mechanical and Microwave Absorption Properties of Polystyrene/Graphene Nanocomposites

Abstract

In the present study the effect of graphene percentage and graphene modification on the microwave absorption properties of the polystyrene/graphene nanocomposites was studied in detail. Acid modified graphene was prepared by the mixed acid route. Polystyrene/graphene nanocomposites with various percentages of graphene and modified graphene were prepared by solution mixing process. The dispersion of graphene sheets in the polystyrene matrix was analyzed by TEM and SEM and found to be uniform for the 1%, 2 wt% of graphene and 1 wt% of modified graphene loading. Microwave absorption of modified graphene containing nanocomposite was found to be superior among the nanocomposites. Incorporation of 1 wt% of ferrite particles enhanced the microwave absorption of the nanocomposite above all the nanocomposites, in the whole range of X-band, due to the effective cancellation of both electrical and magnetic components of the microwave. Incorporation of graphene enhanced the thermal and mechanical properties of the nanocomposites.

Post-Crosslinked Poly(<I>meta</I>-divinylbenzene) and Its Adsorption to Phenol from Aqueous Solutions

“…[1][2][3][4][5][6][7][8][9][10][11][12] In 1970's, Davankov et al prepared a types of novel hypercrosslinked polymers (HCPs) using a post-crosslinking method, 13 14 and these HCPs exhibit high Brunauer-Emmett-Teller (BET) surface area and unique pore structure, 15 16 which lead to excellent adsorption to aromatic compounds. Unfortunately, the synthetic procedure for the HCPs are confronted with some problems; the most serious one is utilization of the recognized carcinogen chloromethyl methyl ether (CMME) in the Friedel-Crafts reaction, which presents problems both in the production process and field application.…”