Extraction and characterization of cellulose nanocrystals from brown seaweed Dictyota bartayreisana, J.V.Lamouroux

For the first time, cellulose nanocrystal (CNC) was derived from the biomass of brown seaweed Dictyota bartayresiana , undergoing a comprehensive process of extraction and transformation. The structural analysis, conducted via Transmission Electron Microscopy (TEM), affirmed that the resulting CNCs displayed an average width of approximately 26 nm and a length extending to 520nm long. X-ray Diffraction (XRD) analysis indicated that these extracted CNCs constituted around 62%. Fourier Transform Infrared (FTIR) spectral analysis confirmed the successive removal of non-cellulosic components through chemical treatments. Elemental analysis (CHNS) validated the presence of sulphate groups, accounting for 0.59%. Thermogravimetric Analysis (TGA) results unveiled the superior thermal stability of the extracted CNCs.