Nanostructurally Controlled Hydrogel Based on Small-Diameter Native Chitin Nanofibers: Preparation, Structure, and Properties
2016 (English)In: ChemSusChem, ISSN 1864-5631, E-ISSN 1864-564XArticle in journal (Refereed) PublishedText
Chitin nanofibers of unique structure and properties can be obtained from crustacean and fishery waste. These chitin nanofibers have roughly 4nm diameters, aspect ratios between 25-250, a high degree of acetylation and preserved crystallinity, and can be potentially applied in hydrogels. Hydrogels with a chitin nanofiber content of 0.4, 0.6, 0.8, 1.0, 2.0, and 3.0wt% were successfully prepared. The methodology for preparation is new, environmentally friendly, and simple as gelation is induced by neutralization of the charged colloidal mixture, inducing precipitation and secondary bond interaction between nanofibers. Pore structure and pore size distributions of corresponding aerogels are characterized using auto-porosimetry, revealing a substantial fraction of nanoscale pores. To the best of our knowledge, the values for storage (13kPa at 3wt%) and compression modulus (309kPa at 2wt%) are the highest reported for chitin nanofibers hydrogels.
Place, publisher, year, edition, pages
Wiley-VCH Verlagsgesellschaft, 2016.
Chitin, Compression, Hydrogel, Nanofibers, Rheology, Acetylation, Aspect ratio, Compaction, Gelation, Pore size, Colloidal mixtures, Compression modulus, Crystallinities, Degree of acetylation, Fishery wastes, Nano-scale pores, Secondary bonds, Structure and properties, Hydrogels
IdentifiersURN: urn:nbn:se:kth:diva-186753DOI: 10.1002/cssc.201501697ISI: 000378634800011ScopusID: 2-s2.0-84963808495OAI: oai:DiVA.org:kth-186753DiVA: diva2:932464
QC 201606012016-06-012016-05-132016-07-26Bibliographically approved