<br>超韧MXene/海藻酸钠复合纤维毡，具有出色的电磁干扰屏蔽和加热性能,Nano Letters

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超韧MXene/海藻酸钠复合纤维毡，具有出色的电磁干扰屏蔽和加热性能
Nano Letters ( IF 9.6 ) Pub Date : 2024-06-24 , DOI: 10.1021/acs.nanolett.4c01920
Guoxin Zhao ₁ , Chao Sui ₁ , Chenxi Zhao ₁ , Yushun Zhao _{1,

2} , Gong Cheng ₁ , Junjiao Li ₂ , Lei Wen ₁ , Weizhe Hao ₂ , Yuna Sang ₂ , Yingchun Zhou ₁ , Xiaodong He ₁ , Chao Wang _{1,

2}

Affiliation

用于智能纺织品和便携式设备的多功能 MXene 织物的开发引起了广泛关注。然而，对其结构设计和相关机械性能的研究非常有限。在此，制造了由 MXene/海藻酸钠 (SA) 纤维组成的超韧 MXene 纤维毡。毡的断裂强度和弯曲刚度分别可达97.8 MPa和1.04 N mm ² 。此外，使用经典的格里菲斯理论评估了毡的断裂韧性，得出临界应力强度因子为1.79

M P a \sqrt{m}

$M P a \sqrt{m}$
。此外，这种毛毡还具有出色的电热转换性能（2.5 V电压下可达119°C）、高低温和高温光热转换性能耐受性（-196至160°C）以及优异的电磁干扰性能。 (EMI) 屏蔽效能（X 波段为 54.4 dB）。这项工作为高性能 MXene 纺织品提供了新的结构设计概念，拓宽了其未来的应用。

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Supertough MXene/Sodium Alginate Composite Fiber Felts Integrated with Outstanding Electromagnetic Interference Shielding and Heating Properties

The development of multifunctional MXene-based fabrics for smart textiles and portable devices has garnered significant attention. However, very limited studies have focused on their structure design and associated mechanical properties. Here, the supertough MXene fiber felts composed of MXene/sodium alginate (SA) fibers were fabricated. The fracture strength and bending stiffness of felts can be up to 97.8 MPa and 1.04 N mm², respectively. Besides, the fracture toughness of felts was evaluated using the classic Griffith theory, yielding to a critical stress intensity factor of 1.79

M P a \sqrt{m}

$M P a \sqrt{m}$ . In addition, this kind of felt presents outstanding electrothermal conversion performance (up to 119 °C at a voltage of 2.5 V), high cryogenic and high-temperature tolerance of photothermal conversion performance (−196 to 160 °C), and excellent electromagnetic interference (EMI) shielding effectiveness (54.4 dB in the X-band). This work provides new structural design concepts for high-performance MXene-based textiles, broadening their future applications.

更新日期：2024-06-24

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