• 文献标题:   Biomimetically Inspired Highly Homogeneous Hydrophilization of Graphene with Poly(L-DOPA): Toward Electroconductive Coatings from Water-Processable Paints
  • 文献类型:   Article
  • 作  者:   KUZIEL A, DZIDO G, JEDRYSIAK RG, KOLANOWSKA A, JOZWIAK B, BEUNAT J, KORCZENIEWSKI E, ZIEBA M, TERZYK AP, YAHYA N, THAKUR VK, KOZIOL KK, BONCEL S
  • 作者关键词:   graphene, covalent functionalization, waterprocessing, poly ldopa, hydrophilization, electroconductive coating
  • 出版物名称:   ACS SUSTAINABLE CHEMISTRY ENGINEERING
  • ISSN:   2168-0485
  • 通讯作者地址:  
  • 被引频次:   1
  • DOI:   10.1021/acssuschemeng.2c00226
  • 出版年:   2022

▎ 摘  要

Water-based processing of graphene-typically considered as physicochemically incompatible with water in the macroscale-emerges as the key challenge among the central postulates of green nanotechnology. These problematic concerns are derived from the complex nature of graphene in the family of sp(2)-carbon nanoallotropes. Indeed, nanomaterials hidden under the common "graphene" signboard are very rich in morphological and physicochemical variants. In this work, inspired by the adhesion chemistry of mussel biomaterials, we have synthesized novel, water-processable graphene-polylevodopa (PDOPA) hybrids. Graphene and PDOPA were covalently amalgamated via the "growth-from" polymerization of L-DOPA (L-3,4-dihydroxyphenylalanine) monomer in air, yielding homogeneously PDOPA-coated (23 wt %) (of thickness 10-20 nm) hydrophilic flakes. The hybrids formed >1 year stable and water-processable aqueous dispersions and further conveniently processable paints of viscosity 0.4 Pa center dot s at 20 s(-1) and a low yield stress tau(0) up to 0.12 Pa, hence exhibiting long shelf-life stability and lacking sagging after application. Demonstrating their applicability, we have found them as surfactant-like nanoparticles stabilizing the larger, pristine graphene agglomerates in water in the optimized graphene/graphene-PDOPA weight ratio of 9:1. These characteristics enabled the manufacture of conveniently paintable coatings of low surface resistivity of 1.9 k Omega sq(-1) (0.21 Omega center dot m) which, in turn, emerge as potentially applicable in textronics, radar-absorbing materials, or electromagnetic interference shielding.