Cucurbit[8]uril-Derived Graphene Hydrogels
Cucurbit[8]uril-Derived Graphene Hydrogels
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DOI：
10.1021/acsmacrolett.9b00717
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发表时间：
2019-12-01
影响因子：
7.015
通讯作者：
Scherman, Oren A.
中科院分区：
文献类型：
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作者：
Rana, Vijay K.;Tabet, Anthony;Scherman, Oren A.
均匀分布石墨烯（GR）基复合材料的规模化生产仍然是一个相当大的挑战。虽然GR-聚合物纳米复合材料可以大规模生产，但工艺限制导致对基质中疏水GR片的均匀性控制较差。这样的过程通常会导致难以控制稳定性和避免聚集，从而消除了纳米级GR可能带来的好处。在这里，我们报告了一种在水中剥落和稳定的GR分散体。利用葫芦b[8]介导的主-客体化学反应，获得了由均匀分布的GR和客体功能化大分子组成的超分子水凝胶。与不含CB[8]的相同体系相比，所获得的GR水凝胶具有更好的生物电性能。利用这种与生物衍生的大分子的超分子相互作用是一种很有前途的方法，可以稳定石墨烯在水中并避免氧化化学。
The scalable production of uniformly distributed graphene (GR)-based composite materials remains a sizable challenge. While GR-polymer nanocomposites can be manufactured at a large scale, processing limitations result in poor control over the homogeneity of hydrophobic GR sheets in the matrices. Such processes often result in difficulties controlling stability and avoiding aggregation, therefore eliminating benefits that might have otherwise arisen from the nanoscopic dimensions of GR. Here, we report an exfoliated and stabilized GR dispersion in water. Cucurbit[8]uril (CB[8])-mediated host-guest chemistry was used to obtain supramolecular hydrogels consisting of uniformly distributed GR and guest-functionalized macromolecules. The obtained GR hydrogels show superior bioelectrical properties over identical systems produced without CB[8]. Utilizing such supramolecular interactions with biologically derived macromolecules is a promising approach to stabilize graphene in water and avoid oxidative chemistry.