Preparation of dry ultra-porous cellulosic fibres: Characterization and possible initial uses
2013 (English)In: Carbohydrate Polymers, ISSN 0144-8617, E-ISSN 1879-1344, Vol. 92, no 1, 775-783 p.Article in journal (Refereed) Published
Dry ultra-porous cellulose fibres were obtained using a liquid exchange procedure in which water was replaced in the following order: water, methanol, acetone, and finally pentane: thereafter, the fibres were dried with Ar(g). The dry samples (of TEMPO-oxidized dissolving pulp) had a specific surface area of 130 m(2) g(-1) as measured using BET nitrogen gas adsorption. The open structure in the dry state was also revealed using field emission scanning electron microscopy. This dry open structure was used as a scaffold for in situ polymerization. Both poly(methyl methacrylate) and poly(butylacrylate) were successfully used as matrix polymers for the composite material (fibre/polymer), comprising approximately 20 wt% fibres. Atomic force microscopy phase imaging indicated a nanoscale mixing of the matrix polymer and the cellulose fibril aggregates and this was also supported by mechanical testing of the prepared composite where the open fibre structure produced superior composites. The fibre/polymer composite had a significantly reduced water absorption capacity also indicating an efficient filling of the fibre structure with the matrix polymer.
Place, publisher, year, edition, pages
2013. Vol. 92, no 1, 775-783 p.
Cellulose fibre, Composite, In situ polymerization, Liquid exchange, Open structure, Surface area
IdentifiersURN: urn:nbn:se:kth:diva-103402DOI: 10.1016/j.carbpol.2012.09.090ISI: 000313146900110ScopusID: 2-s2.0-84868215766OAI: oai:DiVA.org:kth-103402DiVA: diva2:559923
QC 20130218. Updated from submitted to published.2012-10-112012-10-112014-11-07Bibliographically approved