The objective of this work is to develop porous maize stalk cellulose fiber-reinforced geopolymer composites for heat insulation on the bottom side of an electric stove using the solid impregnation method. Heat loss measurement is conducted using an infrared thermometer. Moreover, the temperature effect on the composites is investigated. The maize stalk cellulose fibers are very essential to anticipate the cracking phenomenon generated by high temperatures. The degradation of the fibers causes the formation of small cavities in the matrix, and thus leads to high temperatures. The experimental result shows that it takes 22 minutes to boil water using the proposed electric stove, whereas it takes 29 minutes using the existing local electric stove. By using the proposed electric stove to boil water, 113,793,148.104 KWh of energy per year at the national level can be saved.

Natural composite material has been successfully fabricated employing sugar cane bagasse as reinforcement and natural rubber as a matrix. The goal of this study was to characterize and analyze this composite material by varying parameters such as fiber weight fraction and type, and fiber surface treatments. Optimization of the properties was carried out by applying various experimental techniques to determine the viscosity, curing torque, and abrasion wear, as well as mechanical, morphological, and thermal properties. The finding showed the viscosity, specific gravity, and curing torque increased with increasing bagasse content. Similarly, the braking force, tensile strength, and modulus of elasticity have shown remarkable improvements with the addition of the bagasse reinforcement. Sodium hydroxide-treated fibers and bagasse ash fillers have demonstrated superior properties compared to untreated fiber-rubber composites. Better dispersion and morphological properties were also obtained when using sodium hydroxide-treated bagasse reinforcement and bagasse ash, and thus are recommendations of this study for use in rubber composites.