20.500.12556/DKUM-91737 Isolation and characterization of nanocellulose from Polypodiophyta fern using chemo-mechanical method Nanocellulose is considered a promising and sustainable biomaterial, with excellent properties of biorenewability with improved mechanical properties. As a unique natural biopolymer, it has been applied to many different industries, where efficient and environmentally friendly productions are in demand. For the first time, ferns from the class Polypodiopsida were used for the isolation of cellulose fibers, which was performed using a chemo-mechanical method. As chemical treatment plays a crucial role in the isolation of nanocellulose, it affects the efficiency of the extraction process, as well as the properties of the resulting nanocellulose. Therefore, mechanical fibrillation was performed via grinding, while the chemical process consisted of three different treatments: alkali treatment, bleaching, and acid hydrolysis. In three different experiments, each treatment was separately prolonged to investigate the differing properties of isolated nanocellulose. Structural analysis and morphological analysis were investigated by SEM, EDS, FT-IR, and DLS. The thermal stability of cellulose fibers was investigated by TGA/DSC. The morphology of obtained nanocellulose was confirmed via SEM analysis for all samples, with particles ranging from 20 nm up to 600 nm, while the most consistent sizes were observed for NC3, ranging from 20 to 60 nm. FT-IR spectra showed prominent absorption peaks corresponding to cellulose, as well as the absence of absorption peaks, corresponding to lignin and hemicellulose. The EDS confirmed the elemental purity of nanocellulose, while TGA/DSC indicated higher thermal stability of nanocellulose, compared to untreated fern, which started to degrade earlier than nanocellulose. Such characteristics with unique properties make nanocellulose a versatile biomaterial for the industrial production of cellulosic materials. nanocellulose isolation Polypodiophyta fern chemo-mechanical method biomaterial biopolymers nanoceluloza izolacija kemijsko-mehanske lastnosti biomateriali biopolimeri true true false MDPI Angleški jezik Slovenski jezik https://www.mdpi.com/2313-7673/9/10/624 © 2024 by the authors Članek v reviji 2025-01-31 10:25:52 2025-01-31 10:25:53 2025-02-01 03:19:32 0000-00-00 00:00:00 2024 0 0 16 str. iss. 10, [article no.] 624 Vol. 9 Oct. 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2024-10-10 2024-10-11 2024-10-14 620.3 212094723 10.3390/biomimetics9100624 2313-7673 biomimetics-09-00624.pdf biomimetics-09-00624.pdf 1 1C74F3A837569A91878F7DE47D19125C a4cdf9b57ffa169a4eb3b0438f90d929f738e26bdd165fdb42620ee41aecb4da 9517582b-dfb5-11ef-ae92-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=188363 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0