Effect of heating time of silica gel extraction from rice husk ash toward fire propagation rate for paper coating
Himawan Hadi Sutrisno Riza Wirawan Andralisa Febriyani Desi Ambarwati
Universitas Negeri Jakarta
Abstract
Silica is one of chemical elements, which contains a high thermal characteristic compared to other substances. Therefore, this element is frequently utilized as an additional element that can withstand fire propagation rate by providing heating variation in silica production such as 15 minutes, 30 minutes, 45 minutes and one hour of heating time. It gives an impact toward the thermal characteristic from the production process of the silica gel with KOH solvent. The thermal characteristic is tested by using a thermogravimetric analysis. Meanwhile, in order to discover a decrease of the fire propagation rate, a test is conducted with flammability test with paper medium coated by the silica gel. From TGA result, in 300°C temperature, the silica gel heated in the equipment does not experience many changes of mass, although when the temperature is increased to 600°C, there is still a relatively high residual material compared to the initial mass. The test result using TGA and flammability test shows that the silica gel extracted from the rice husk ash by using KOH solvent with 15 minutes of heating time contains a good thermal characteristic compared to other variants. Meanwhile, a sample of paper, which has been soaked with 15 minutes of time variant produces more residuals compared to other samples
Keywords: Silica, Rice Husk Ash, Thermal
Topic: Mechanical Engineering