| 학회 |
한국고분자학회 |
| 학술대회 |
2004년 봄 (04/09 ~ 04/10, 고려대학교) |
| 권호 |
29권 1호, p.150 |
| 발표분야 |
복합재료 |
| 제목 |
Hybridization of MWNT and silver powder in polyurathane matrix for electromagnetic interference shielding applications |
| 초록 |
The as-received multi-walled nanotubes (MWNTs) are chemically modified with respect to various oxidative conditions, which include an acid concentration, treatment temperature, and treatment time. The conductivity of MWNT filled polyurethane (PU) composites produced by using the optimal condition is measured as a function of frequency with the content of MWNTs. The experimental results are analyzed using percolation theory. The volume resistivity of the PU composites filled with only MWNT can not satisfy the requirements for shielding materials for highly demanding applications. Thus, conductive polymeric composites are derived from PU matrix filled with MWNT and Ag powder. It is found that a small amount of the MWNT remarkably enhances the conductivity of the filler blend composites through bridging the gap between the Ag aggregates. Electromagnetic interference (EMI) shielding effectiveness (SE) of the filler blend composites is measured in the frequency range from 10 to 1000 MHz by using ASTM D4935-89. The measured SE of the filler blend composites could be controlled from about 60 dB to over 80 dB with the compositions of conductive fillers. |
| 저자 |
안경진1, 김윤진1, 김상철2, 정연춘3, 최형도4, 권종하4, 윤호규1
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| 소속 |
1고려대, 2(주)AMIC, 3서경대, 4ETRI 전자파환경연구팀 |
| 키워드 |
polyuirathane; carbon nanotube; conductivity; composites; Electromagnetic
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| E-Mail |
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