화학공학소재연구정보센터
학회 한국화학공학회
학술대회 2019년 봄 (04/24 ~ 04/26, 제주국제컨벤션센터)
권호 25권 1호, p.833
발표분야 재료(Materials)
제목 LDPE/GNP Insulating Nanocomposites for Effective Reduction of Space Charge Accumulation in HVDC Cables
초록 We have demonstrated a straightforward hydrophobic surface modification of graphene nanoplatelets (GNPs) through a defect-healing process to fabricate well-dispersed insulating low-density polyethylene (LDPE)/GNP nanocomposites, and have confirmed their effective suppression of space-charge accumulation. Without any organic modifiers, GNPs containing oxygen-based functional groups at the edges were successfully reduced at optimal high-temperature defect-healing condition, and modified to have hydrophobic surface properties similar to those of the LDPE matrix. The degree of dispersion and the reproducibility of the mechanically melt-mixed LDPE/GNP nanocomposites were immediately analyzed by thickness-normalized optical absorption measurement. In the LDPE matrix, below the percolation threshold concentration, well-dispersed GNP fillers effectively acted as trapping sites under high electric fields, resulting in the successful suppression of packet-like space-charge accumulation (field enhancement factor = 1.04 @ 0.1 wt% LDPE/GNP nanocomposite).
저자 박지선1, 김영선1, 박다슬1, 남진호2, 김윤진1
소속 1전자부품(연), 2LS전선
키워드 재료
E-Mail
원문파일 초록 보기