Publicação
Ultrathin, strong, and highly flexible Ti3C2Tx MXene/bacterial cellulose composite films for high-performance electromagnetic interference shielding
| Resumo: | The fabrication of ultrathin films that are electrically conductive and mechanically strong for electromagnetic interference (EMI) shielding applications is challenging. Herein, ultrathin, strong, and highly flexible Ti3C2Tx MXene/bacterial cellulose (BC) composite films are fabricated by a scalable in situ biosynthesis method. The Ti3C2Tx MXene nanosheets are uniformly dispersed in the three-dimensional BC network to form a mechanically entangled structure that endows the MXene/BC composite films with excellent mechanical properties (tensile strength of 297.5 MPa at 25.7 wt % Ti3C2Tx) and flexibility. Importantly, a 4 μm thick Ti3C2Tx/BC composite film with 76.9 wt % Ti3C2Tx content demonstrates a specific EMI shielding efficiency of 29141 dB cm2 g−1, which surpasses those of most previously reported MXene-based polymer composites with similar MXene contents and carbon-based polymer composites. Our findings show that the facile, environmentally friendly, and scalable fabrication method is a promising strategy for producing ultrathin, strong, and highly flexible EMI shielding materials such as the freestanding Ti3C2Tx/BC composite films for efficient EMI shielding to address EMI problems of a fast-developing modern society. |
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| Autores principais: | Wan, Yizao |
| Outros Autores: | Xiong, Peixun; Liu, Jinzhi; Feng, Fangfang; Xun, Xiaowei; Gama, F. M.; Zhang, Quanchao; Yao, Fanglian; Yang, Zhiwei; Luo, Honglin; Xu, Yunhua |
| Assunto: | Thickness Coating materials Composites Electrical conductivity Two dimensional materials Ti3C2Tx MXene bacterial cellulose composite films biosynthesis electromagnetic interference shielding Ti C T MXene 3 2 x Ciências Naturais::Ciências Biológicas |
| Ano: | 2021 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso restrito |
| Instituição associada: | Universidade do Minho |
| Idioma: | inglês |
| Origem: | RepositóriUM - Universidade do Minho |
| Resumo: | The fabrication of ultrathin films that are electrically conductive and mechanically strong for electromagnetic interference (EMI) shielding applications is challenging. Herein, ultrathin, strong, and highly flexible Ti3C2Tx MXene/bacterial cellulose (BC) composite films are fabricated by a scalable in situ biosynthesis method. The Ti3C2Tx MXene nanosheets are uniformly dispersed in the three-dimensional BC network to form a mechanically entangled structure that endows the MXene/BC composite films with excellent mechanical properties (tensile strength of 297.5 MPa at 25.7 wt % Ti3C2Tx) and flexibility. Importantly, a 4 μm thick Ti3C2Tx/BC composite film with 76.9 wt % Ti3C2Tx content demonstrates a specific EMI shielding efficiency of 29141 dB cm2 g−1, which surpasses those of most previously reported MXene-based polymer composites with similar MXene contents and carbon-based polymer composites. Our findings show that the facile, environmentally friendly, and scalable fabrication method is a promising strategy for producing ultrathin, strong, and highly flexible EMI shielding materials such as the freestanding Ti3C2Tx/BC composite films for efficient EMI shielding to address EMI problems of a fast-developing modern society. |
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