Characterization of functionalized graphene materials

Haydale Ltd. (Ammanford, UK) reports that it has developed a rapid, in-house characterization test method to confirm functionalization of graphene materials.

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Haydale Ltd. (Ammanford, UK) reports that it has developed a rapid, in-house characterization test method to confirm functionalization of graphene materials. Haydale notes that most particles, including surface-functionalized carbon nanoparticles, dispersed in an aqueous system, acquire a surface charge, principally either by ionization of surface groups, or adsorption of charged species. These surface charges modify the distribution of the surrounding ions, resulting in a layer around the particle that is different to the bulk solution. Haydale’s new dispersion stability method provides what is said to be a rapid, simple and repeatable test to confirm the effectiveness of its HDPlas graphene functionalization process. Further, the method is able to indicate the level of functional groups added and to discriminate between different functional groups. Complementary to traditional chemical characterization methods currently used by graphene industry, Haydale says its new dispersion stability tester provides an affordable and reliable quality control tool for functionalized graphene process development and manufacturing.