Flexible and Multifunctional Silk Textiles with Biomimetic Leaf-Like MXene/Silver Nanowire Nanostructures for Electromagnetic Interference Shielding, Humidity Monitoring, and Self-Derived Hydrophobicity
Flexible and Multifunctional Silk Textiles with Biomimetic Leaf-Like MXene/Silver Nanowire Nanostructures for Electromagnetic Interference Shielding, Humidity Monitoring, and Self-Derived Hydrophobicity
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具有仿生叶状 MXene/银纳米线纳米结构的柔性多功能丝绸纺织品，用于电磁干扰屏蔽、湿度监测和自衍生疏水性
DOI：
10.1002/adfm.201905197
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发表时间：
2019-09-01
影响因子：
19
通讯作者：
Yu, Zhong-Zhen
中科院分区：
文献类型：
--
作者：
Liu, Liu-Xin;Chen, Wei;Yu, Zhong-Zhen
尽管柔性和多功能纺织品在可穿戴电子产品和便携式设备应用中前景广阔，但主要问题是赋予纺织品多功能性，同时保持其固有的柔性和多孔特性。在此，展示了一种真空辅助逐层组装技术，可以在纺织品上保形沉积导电物质，以开发具有卓越电磁干扰（EMI）屏蔽性能、超疏水性和高度敏感湿度响应的多功能柔性纺织品。形成的叶状纳米结构由作为高导电骨架（静脉）的银纳米线（AgNW）和作为层的过渡金属碳化物/碳氮化物（MXene）纳米片组成。 MXene的存在可以保护AgNWs免受氧化，增强AgNWs与织物基底的结合，并且其官能团的转变导致自生疏水性。这种柔性多功能纺织品表现出0.8Ω sq(-1)的低方块电阻、在120μm的小厚度下X波段54dB的出色EMI屏蔽效率以及高度灵敏的湿度响应，同时保留了令人满意的孔隙率和渗透性。通过老化亲水性 MXene 涂层丝，实现了大于 140 度的大接触角的自生疏水性。可穿戴多功能纺织品在智能服装、湿度传感器、执行器和 EMI 屏蔽等领域的应用前景广阔。
Although flexible and multifunctional textiles are promising for wearable electronics and portable device applications, the main issue is to endow textiles with multifunctionalities while maintaining their innate flexible and porous features. Herein, a vacuum-assisted layer-by-layer assembly technique is demonstrated to conformally deposit electrically conductive substances on textiles for developing multifunctional and flexible textiles with superb electromagnetic interference (EMI) shielding performances, superhydrophobicity, and highly sensitive humidity response. The formed leaf-like nanostructure is composed of silver nanowires (AgNWs) as the highly conductive skeleton (vein) and transition metal carbide/carbonitride (MXene) nanosheets as the lamina. The presence of MXene protects AgNWs from oxidation and enhances the combination of AgNWs with the fabric substrate, and the transformation of its functional groups leads to self-derived hydrophobicity. The flexible and multifunctional textile exhibits a low sheet resistance of 0.8 omega sq(-1), outstanding EMI shielding efficiency of 54 dB in the X-band at a small thickness of 120 mu m, and highly sensitive humidity responses, while retaining its satisfactory porosity and permeability. The self-derived hydrophobicity with a large contact angle of >140 degrees is achieved by aging the hydrophilic MXene coated silk. The wearable multifunctional textiles are highly promising for applications in intelligent garments, humidity sensors, actuators, and EMI shielding.