 This study investigates the use of typholatifolia, typho-SP, as a new raw material for the isolation of cellulose nanocrystals, CNCs, for future application in geopolymer cement. The CNCs were extracted from the stem fibers through alkali and bleaching treatments, followed by acid hydrolysis. The chemical composition of cellulose, hemicellulose, and lignin was 60.9%, 7%, and 5.7%, respectively. Transmission electron microscopy showed a reduction in particle size due to the loss of the amorphous portion of the typho-SP fiber. Thermographometric analysis revealed that CNCs have good thermal stability at 240 degrees Celsius, which is higher than raw ones. Based on these characteristics, it can be concluded that CNCs have potential as a reinforcement in geopolymer cement. This article was authored by Kurt Ramawarty, Shri Akrelia, Tofix ID, and others.