Thin-Film-Transistor Liquid-Crystal Display Waste Glass and Nano-SiO_2 as Substitute Sources for Metakaolin-Based Geopolymer

摘要

Thin-film-transistor liquid-crystal display (TFT-LCD) waste glass can be used as a raw material in the production of geopolymer because of its amorphous and also contains relatively large amounts of silicon and aluminum. The effects of nano-SiO_2 (NS) addition levels (0%-3%) with 1% increments and the geopolymer replacement levels of TFT-LCD waste glass (0%-40%) with 10% increments were analyzed quantitatively. The optimal geopolymer proportion was identified based on its mechanical characteristics and flexural strength. The geopolymer samples were also analyzed for changes in weight, and a thermogravimetric analyzer and ~(29)Si magic-angle spinning nuclear magnetic resonance to measure the short-range network ordering. The results of this study indicated that the TFT-LCD waste glass metakaolin (TWGM) geopolymer sample with 10% TFT-LCD waste glass and 1% NS exhibited greater strength and lower porosity than other samples. Understanding these characteristics is necessary to identify the mechanical strength, thermal stability, and the fundamental structure of a geopolymer system. Applying NS to a geopolymer enhances its compactness, improves its uniformity, and increases its strength. These results show that 10% TFT-LCD waste glass and 1% NS can be used as a partial substitute for metakaolin (MK) in geo-polymer materials.