| 학회 |
한국재료학회 |
| 학술대회 |
2020년 가을 (11/18 ~ 11/20, 휘닉스 제주 섭지코지) |
| 권호 |
26권 1호 |
| 발표분야 |
G. 나노/박막 재료 분과 |
| 제목 |
Bio-Inspired Artificial Nacre Films Based on non-oxidized graphene |
| 초록 |
Nacre-mimetics exhibit extraordinary strong and tough properties due to their unique multilevel hierarchical structure. Here, inspired by the nacre, we demonstrated a new type of ternary artificial nacre based on carboxymethyl cellulose (CMC) and Mn2+ cross linked non-oxidized graphene flakes (NOGFs) via self-assembled gel-film transformation. For this, we synthesized non-oxidized graphene (ID/IG ratio; 0.096) with large lateral sizes of more than 5 μm using ternary graphite intercalation compounds (t-GICs). Furthermore, a novel approach to disperse NOGFs with non-covalent functionalization of melamine (f-NOGFs), still preserving intrinsic material properties of NOGFs, was suggested. The tensile strength and toughness of f-NOGFs- Mn2+-CMC nacre film reached up to 595.62 MPa and 6.31 MJ·m-3 due to the synergistic effect of intermolecular hydrogen bond crosslinking and ion-crosslinking in f-NOGFs-Mn2+-CMC nacre film, respectively, which are superior to that of previously reported GO/rGO-based artificial nacre films. More interestingly, the flexible artificial nacre with f-NOGFs-Mn2+-CMC is superior to electrical conductivity (~ 161 KΩ/□) and flame retardant property through synergistic effects emerging from building blocks and interfacial interactions. This multifunctional graphene based artificial nacre film have promising potential in many applications, including aerospace, artificial muscle and flexible electrodes and flame retardant insulation. |
| 저자 |
Byoung Min Ko1, Hyun Jun Kim2, Sung Gyeong Jung3, Sung Ho Song4, Dongju Lee1, Kwang Young Jeong2
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| 소속 |
1Division of Advanced Materials Engineering, 2Kongju National Univ., 3Chungnam, 4Republic of Korea |
| 키워드 |
Graphene; chemical doping; electrical conductivity; work function; transparent electrode
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| E-Mail |
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