Preparation of Phlogopite-based Geopolymer and Its Surface Nonpolar Modification

Abstract

Phlogopite-based geopolymer was first prepared successfully under the activation of lye by compression molding at 50 MPa for 1 minute. The geopolymer was endowed with nonpolar surface via brushing modified liquid at room temperature. Swill-cooked dirty oil, whose main component was fatty acid, was used as nonpolar modifier. The raw materials and geopolymer samples were characterized by XRD, FT-IR and SEM. The compression strength of 7-day specimen run up to 36.8 MPa and its surface static water contact angle could reach 132°. The solubility of phlogopite powder directly affected the compressive strength of geopolymers and the evaluation index of mechanical strength of geopolymer based on the solubility of phlogopite powder was proposed.

Keywords

phlogopite / geopolymer / nonpolar modification / solubility / compression strength