Intermolecular hydrogen bond ruptured by graphite with different lamellar number

Abstract

Intermolecular hydrogen bonds are formed through the electrostatic attraction between the hydrogen nucleus on a strong polar bond and high electronegative atom with an unshared pair of electrons and a partial negative charge. It affects the physical and chemical properties of substances. Based on this, we presented a physical method to modulate intermolecular hydrogen bonds for not changing the physical–chemical properties of materials. The graphite and graphene are added into the glycerol, respectively, by being used as a viscosity reducer in this paper. The samples are characterized by Raman and 1H-nuclear magnetic resonance. Results show that intermolecular hydrogen bonds are adjusted by graphite or graphene. The rheology of glycerol is reduced to varying degrees. Transmission electron microscopes and computer simulation show that the spatial limiting action of graphite or graphene is the main cause of breaking the intermolecular hydrogen bond network structure. We hope this work reveals the potential interplay between nanomaterials and hydroxyl liquids, which will contribute to the field of solid–liquid coupling lubrication.

A Solid–Liquid Composite Lubricating “Nano‐Snowboard” for Long‐Acting Treatment of Osteoarthritis

“…[37][38][39] Different from the macroscopic composite mode of solid film-liquid lubricant common in industry, Ma et al uniformly dispersed nanoscale single-layer graphene and multilayer graphite materials into glycerol and found that graphene and graphite retained the characteristics of solid lubricants in this system. [40] This phenomenon inspired us to modify the surface of graphene-like nano-MoS 2 material with a uniform liquid lubricating coating and inject it into the joint cavity. Macroscopically, the solid-solid friction between the articular surfaces is transformed into solid-liquid friction between the articular surfaces and the liquid lubricant, while microscopically, the interlayer solid-solid friction of MoS 2 is transformed into liquid-liquid friction between the hydration layers on the surface of the MoS 2 .…”