A series of silica nanoscale materials（NIMs） were prepared through a facile acid-base neutralization. These silica derivatives consist of a nanosilica core, a charged corana（sulfonic acid SIT） attatched to the core, and an oppositely charged canopy （PEG-substituted tertiary amines） to balance the corona. By selecting proper canopy such as surface-functionalized, silica can behave viscous liquid in the absence of any solvent at room temperature. DSC results indicated the melting temperature and glass transition of the derivatives were slightly lower than those of the neat polymer canopy, indicating strong interaction between the core and PEG-substituted tertiary amine.
Nanoscale ionic materials（NIMS） based on carbon black（CB） were prepared through a facile method. Firstly, CB was oxidized in the mixture of nitric acid and sulfuric acid, resulting in a large amounts of -COOH on surface of CB. Then oxidized CB was grafted by polyetheramine through neutralization reaction between -COOH of CB and -NH_2- of polyetheramine, and CB derivatives were obtained. This surface- functionalized CB can behave as liquid at ambient temperature in the absence of solvent by carefully varying the components. FTIR and thermaogravimelric analysis confirmed that the successively grafting of polyetheramine. TEM revealed the monodisperse core-shell structure of CB derivatives particles. The viscoelasticity of CB derivatives were closely related to the molecular weight and loading of polyetheramine. The unique core- shell and ionic structure and flowability of these CB derivatives could guide our future work on obtaining NIMs with tunable and controllable properties and broaden its commercial applications.
