Synthetic Multifunctional Graphene Composites with Reshaping and Self-Healing Features via a Facile Biomineralization-Inspired Process
Synthetic Multifunctional Graphene Composites with Reshaping and Self-Healing Features via a Facile Biomineralization-Inspired Process
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DOI：
10.1002/adma.201803004
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发表时间：
2018-08-23
影响因子：
29.4
通讯作者：
Zhu, Hongwei
中科院分区：
文献类型：
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作者：
Lin, Shuyuan;Zhong, Yujia;Zhu, Hongwei
由于石墨烯是一种具有优异机械、电学、热学和光学性能的二维碳材料，有效制备石墨烯宏观组装体对于石墨烯片的潜在大规模应用具有重要意义。石墨烯宏观组装体的常规制备方法需要严格的条件，并且一旦形成，组装体就无法编辑、重塑或回收。在此，受生物矿化过程的启发，设计了一种由氧化石墨烯/聚丙烯酸/无定形碳酸钙（GO-PAA-ACC）组成的可成型、可多次操作和可回收的凝胶状复合材料的可行方法。这种GO-PAA-ACC材料可以在室温下轻松合成，并在制备过程中形成交联网络结构。值得注意的是，它具有可拉伸性、可延展性、可自修复性，并且在潮湿状态下易于加工，但在干燥状态下坚韧且坚硬。此外，这两种状态可以通过调节含水量轻松切换，表现出可回收性，可用于3D打印形成各种结构。此外，GO-PAA-ACC 可以进行功能化或加工以满足各种特定的应用要求（例如能量存储、执行器）。本工作中GO-PAA-ACC复合材料的制备方法也为其他材料的通用宏观组装提供了一种新的策略，成本低、效率高、便于广泛应用。
Since graphene is a type of 2D carbon material with excellent mechanical, electrical, thermal, and optical properties, the efficient preparation of graphene macroscopic assemblies is significant in the potentially large-scale application of graphene sheets. Conventional preparation methods of graphene macroscopic assemblies need strict conditions, and, once formed, the assemblies cannot be edited, reshaped, or recycled. Herein, inspired by the biomineralization process, a feasible approach of shapeable, multimanipulatable, and recyclable gel-like composite consisting of graphene oxide/poly(acrylic acid)/amorphous calcium carbonate (GO-PAA-ACC) is designed. This GO-PAA-ACC material can be facilely synthesized at room temperature with a cross-linking network structure formed during the preparation process. Remarkably, it is stretchable, malleable, self-healable, and easy to process in the wet state, but tough and rigid in the dried state. In addition, these two states can be readily switched by adjusting the water content, which shows recyclability and can be used for 3D printing to form varied architectures. Furthermore, GO-PAA-ACC can be functionalized or processed to meet a variety of specific application requirements (e.g., energy-storage, actuators). The preparation method of GO-PAA-ACC composite in this work also provides a novel strategy for the versatile macroscopic assembly of other materials, which is low-cost, efficient, and convenient for broad application.