Gas-phase crosslinking of the lignin on the nanoscale fumed silica surface

Abstract

A method for the polymerization modification of nanoscale fumed silica by crosslinking a lignin layer adsorbed on a nanosilica surface under a gas dispersion medium is described. A mixture of phenol and formaldehyde in the presence of HCl proved to be the most effective crosslinking agent. It has been suggested that the crosslinking of lignin molecules occurs by a mechanism similar to the production of phenol-formaldehyde resins.

Keywords

• fumed nanosilica
• lignin
• polymerization modification
• adsorption modification
• mechanical treatment
• gas-phase crosslinking