气凝胶
材料科学
焦耳加热
复合材料
光热治疗
硅酮
MXenes公司
纳米纤维
纳米复合材料
复合数
电磁屏蔽
涂层
纳米技术
作者
Xin Wei,Ming‐Guo Ma,Feng Chen
出处
期刊:ACS applied nano materials
[American Chemical Society]
日期:2021-07-02
卷期号:4 (7): 7234-7243
被引量:64
标识
DOI:10.1021/acsanm.1c01185
摘要
Aerogels with a larger specific surface area and lightweight property have aroused tremendous attention in recent years. Functional aerogel materials have shown applications in the fields of industry, environment, biomedicine, and so forth. Herein, multifunctional composite aerogels of cellulose nanofibers (CNFs), MXenes, and silicone have been achieved via a simple freeze-drying and post-coating process. CNFs with a one-dimensional nanostructure are employed for assisting the construction of three-dimensional frameworks to overcome the weak interlayer bonding force of MXene nanosheets. The resultant aerogel exhibits an electrical conductivity of ∼65.6 S m–1 and an EMI shielding of 39.5 dB. Meanwhile, the silicone coating makes MXene/CNF aerogel membranes hydrophobic, displaying an outstanding water-repellent feature, which is significant for maintaining a satisfactory lightweight of the aerogel in a wet environment. Especially, the silicone-coated MXene/CNF aerogel film also exhibits excellent Joule heating and photothermal performances. In particular, the aerogel shows a fast thermal response and a higher temperature range (30.2–141.4 °C in Joule heating and 30–91 °C in photothermal performance). Considering the characteristics of hydrophobicity, high EMI shielding efficiency, and superior Joule heating and photothermal performances, multifunctional silicone–MXene/CNF aerogel films will have promising applications in intelligent garments and EMI shielding fields.
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