Аннотации:
In this study, α-cellulose was extracted from lignocellulosic simpor leaf residue
as a sustainable alternative to conventional cellulose sources. The extraction process involved the removal of hemicellulose, lignin, and other phytocompounds using alkali
(NaOH) treatment and bleaching with hydrogen peroxide (H2O2). The nanocrystalline
cellulose (NCC) was isolated from α-cellulose using sulfuric acid hydrolysis treatment
followed by ultrasonication. The extracted α-cellulose and isolated NCC were characterized using Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD),
thermogravimetric analysis (TGA), and dynamic light scattering (DLS). The obtained results confirmed that the extracted NCC exhibited characteristic cellulose functional groups
and a crystallinity index of 64.7%, indicating the effective removal of amorphous regions
through sulfuric acid hydrolysis. The thermal stability of the extracted cellulose increased
to 332 ◦C due to the elimination of extractives. DLS analysis showed that the extracted
NCC exhibited high colloidal stability in polar solvents, characterized by a zeta potential of
−70.8 mV and an average particle size of 251.7 nm. This study highlights an environmentally friendly approach for converting low-value biomass waste into high-value cellulose
materials with potential applications in sustainable packaging, biomedical applications
and composite reinforcement.
