Geopolymeric particles, fibers, shaped articles and methods of manufacture

摘要

Disclosed is a shaped geopolymeric particle having a predetermined configuration, comprising a geopolymer functional building block, wherein the geopolymer functional building block is derived from geopolymerization of a selected precursor formulation comprising an amorphous silicate, an alkali activator, and a rheology modifier, wherein the geopolymerization of the precursor formulation occurs at a non-elevated temperature of between about 50 and 600 degrees F such that the non-elevated temperature in conjunction with the preselected precursor formulation modify the viscoelastic behaviour of the precursor formulation so that the rate of geopolymerization can be controlled to provide sufficient time for shaping the geopolymer particle into the predetermined configuration. Also disclosed is a shaped geopolymeric particle comprising a geopolymer, wherein the shaped geopolymeric particle has one or more voids therein, wherein the shaped geopolymer particle is derived from geopolymerization of a precursor formulation comprising an aluminosilicate source, an alkali source, and a blowing agent, wherein the precursor formulation has a preselected viscosity so that the configuration of the shaped geopolymeric particle can be controlled during geopolymerization. Further disclosed is a geopolymer with less than about 1.00 g/cc and how to make it and fibres incorporating the geopolymer.