Nanostructurally Controlled Hydrogel Based on Small-Diameter Native Chitin Nanofibers: Preparation, Structure, and PropertiesVisa övriga samt affilieringar
2016 (Engelska)Ingår i: ChemSusChem, ISSN 1864-5631, E-ISSN 1864-564XArtikel i tidskrift (Refereegranskat) Published
Resurstyp
Text
Abstract [en]
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.
Ort, förlag, år, upplaga, sidor
Wiley-VCH Verlagsgesellschaft, 2016.
Nyckelord [en]
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
Nationell ämneskategori
Kemiteknik
Identifikatorer
URN: urn:nbn:se:kth:diva-186753DOI: 10.1002/cssc.201501697ISI: 000378634800011Scopus ID: 2-s2.0-84963808495OAI: oai:DiVA.org:kth-186753DiVA, id: diva2:932464
Anmärkning
QC 20160601
2016-06-012016-05-132017-11-30Bibliografiskt granskad