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AuthorMohan T.
AuthorChirayil C.J.
AuthorNagaraj C.
AuthorBracic M.
AuthorSteindorfer T.A.
AuthorKrupa I.
AuthorAl Maadeed M.A.A.
AuthorKargl R.
AuthorThomas S.
AuthorKleinschek K.S.
Available date2022-02-27T09:30:33Z
Publication Date2021
Publication NamePolymers
ResourceScopus
Identifierhttp://dx.doi.org/10.3390/polym13060939
URIhttp://hdl.handle.net/10576/27446
AbstractIn this study, we report the isolation of cellulose nanocrystals (CNCs) from Isora plant fibers by sulfuric acid hydrolysis and their assembly on hydrophilic cellulose and silicon-di-oxide (SiO2) surfaces via a layer-by-layer (LBL) deposition method. The isolated CNCs were monodis-persed and exhibited a length of 200-300 nm and a diameter of 10-20 nm, a negative zetapotential (34-39 mV) over a wide pH range, and high stability in water at various concentrations. The multi-layered structure, adsorbed mass, conformational changes, and anticoagulant activity of sequen-tially deposited anionic (sulfated) CNCs and cationic polyethyleneimine (PEI) on the surfaces of cellulose and SiO2 by LBL deposition were investigated using a quartz crystal microbalance tech-nique. The organization and surface features (i.e., morphology, thickness, wettability) of CNCs ad-sorbed on the surfaces of PEI deposited at different ionic strengths (50-300 mM) of sodium chloride were analysed in detail by profilometry layer-thickness, atomic force microscopy and contact angle measurements. Compared to cellulose (control sample), the total coagulation time and plasma deposition were increased and decreased, respectively, for multilayers of PEI/CNCs. This study should provide new possibilities to fabricate and tailor the physicochemical properties of multilayer films from polysaccharide-based nanocrystals for various biomedical applications.
SponsorAcknowledgments: The authors acknowledge Volker Ribitsch (retired) from the University of Graz/Austria for his support and valuable discussion for this manuscript. The authors also acknowledge the financial support from the Slovenian National Research Agency ARRS (Grant No. J4-1764).
Languageen
PublisherMDPI AG
SubjectAtomic force microscopy
Cellulose
Cellulose derivatives
Cellulose nanocrystals
Contact angle
Crystal structure
Ionic strength
Medical applications
Morphology
Multilayer films
Multilayers
Physicochemical properties
Polyethylenes
Silica
Silicon oxides
Sodium chloride
Sodium metallography
Textile fibers
Anticoagulant activities
Biomedical applications
Cellulose nanocrystal (CNCs)
Hydrophilic cellulose
Layer by layer deposition
Layer-by-layer approaches
Multi-layered structure
Sulfuric acid hydrolysis
Deposition
Anatomy
Cellulose Derivatives
Contact Angle
Crystal Structure
Ionic Strength
TitleAnticoagulant activity of cellulose nanocrystals from isora plant fibers assembled on cellulose and sio2 substrates via a layer-by-layer approach
TypeArticle
Issue Number6
Volume Number13
dc.accessType Open Access


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