Crab Chitin-Based 2D Soft Nanomaterials for Fully Biobased Electric Devices
Crab Chitin-Based 2D Soft Nanomaterials for Fully Biobased Electric Devices
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用于全生物基电子设备的基于蟹甲壳素的二维软纳米材料
DOI：
10.1002/adma.201606895
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发表时间：
2017
影响因子：
29.4
通讯作者：
Li Chaoxu
中科院分区：
文献类型：
--
作者：
You Jun;Li Mingjie;Ding Beibei;Wu Xiaochen;Li Chaoxu
2D纳米材料具有各种尺寸/形态相关的特性，适用于电子、光学、传感和驱动。然而，深入研究的无机2D纳米材料由于合成条件苛刻、成本高、细胞毒性和不可降解性，经常阻碍其在某些特定和工业领域的应用。奋进已被用于寻找具有生物相容性、可持续性和生物降解性的生物基2D纳米材料。据报道，疏水化诱导的界面组装的方法从海洋甲壳素产生前所未有的类型的纳米片。在此过程中，两层甲壳素聚集体组装成具有高纵横比的纳米片。这些纳米片具有超稳定性和两亲性，具有产生高度稳定的Pickering乳液的能力，内相高达83.4%，液滴尺寸高达140 μm，类似于氧化石墨烯。将乳化和碳化相结合可以进一步将这些2D前体转化为厚度低至3.8nm的碳纳米片。具有生物来源、导电性和在各种溶剂中的溶解性，所得的碳纳米片开始了开发海洋资源用于具有可持续性和生物降解性的完全生物基电气设备的新场景，例如，超级电容器、柔性电路和电子传感器。甲壳素和碳纳米片的混合膜还提供了绿色电子产品、可穿戴电子产品、可生物降解电路和生物装置中所需的导电组分的低成本和环境友好的替代品。
2D nanomaterials have various size/morphology‐dependent properties applicable in electronics, optics, sensing, and actuating. However, intensively studied inorganic 2D nanomaterials are frequently hindered to apply in some particular and industrial fields, owing to harsh synthesis, high‐cost, cytotoxicity, and nondegradability. Endeavor has been made to search for biobased 2D nanomaterials with biocompatibility, sustainability, and biodegradability. A method of hydrophobization‐induced interfacial‐assembly is reported to produce an unprecedented type of nanosheets from marine chitin. During this process, two layers of chitin aggregations assemble into nanosheets with high aspect ratio. With super stability and amphiphilicity, these nanosheets have super ability in creating highly stable Pickering emulsions with internal phase up to 83.4% and droplet size up to 140 μm, in analogue to graphene oxide. Combining emulsifying and carbonization can further convert these 2D precursors to carbon nanosheets with thickness as low as ≈3.8 nm. Having biologic origin, conductivity, and dispersibility in various solvents, resultant carbon nanosheets start a new scenario of exploiting marine resources for fully biobased electric devices with sustainability and biodegradability, e.g., supercapacitor, flexible circuits, and electronic sensors. Hybrid films of chitin and carbon nanosheets also offer low‐cost and environment‐friendly alternative of conductive components desirable in green electronics, wearable electronics, biodegradable circuits, and biologic devices.