The　combination　of　an　alternating　current　arc　reactor　and　a　fluidized　bed　has　been　developed　to　offer　a　new　route　for　the　surface　modification　of　carbon　nanoparticles.　In　this　method,　O-　and　N-doped　carbon　nanoparticles　were　successfully　obtained　after　treatment　under　different　plasma　atmospheres.　The　treated　and　untreated　particles　were　then　melt-blended　with　acrylonitrile-butadiene-styrene/ethylene-propylene-diene　monomer　composites　to　reinforce　the　mechanical　and　electrical　properties.　The　results　showed　that,　after　surface　modification,　polar　functional　groups　were　successfully　introduced　onto　the　surface　of　carbon　nanoparticles　but　the　crystalline　structure　had　been　changed.　Tensile　strength　and　impact　strength　of　ABS/EPDM　filled　with　treated　particles　have　been　remarkably　improved　since　the　incompatible　carbon　nanoparticles　could　be　imbedded　into　the　matrix　compatibly　after　modification　while　electrical　resistivity　showed　complex　variation　tendency.　©　2017