Nanocellulose-Zeolite Composite Films for Odor Elimination
2015 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 7, no 26, 14254-14262 p.Article in journal (Refereed) Published
Free standing and strong odor-removing composite films of cellulose nanofibrils (CNF) with a high content of nanoporous zeolite adsorbents have been colloidally processed. Thermogravimetric desorption analysis (TGA) and infrared spectroscopy combined with computational simulations showed that commercially available silicalite-1 and ZSM-5 have a high affinity and uptake of volatile odors like ethanethiol and propanethiol, also in the presence of water. The simulations showed that propanethiol has a higher affinity, up to 16%, to the two zeolites compared with ethanethiol. Highly flexible and strong free-standing zeolite CNF films with an adsorbent loading of 89 w/w% have been produced by Ca-induced gelation and vacuum filtration. The CNF-network controls the strength of the composite films and 100 mu m thick zeolite CNF films with a CNF content of less than 10 vol % displayed a tensile strength approaching 10 MPa. Headspace solid phase microextraction (SPME) coupled to gas chromatography mass spectroscopy (GC/MS) analysis showed that the CNF zeolite films can eliminate the volatile thiol-based odors to concentrations below the detection ability of the human olfactory system. Odor removing zeolite-cellulose nanofibril films could enable improved transport and storage of fruits and vegetables rich in odors, for example, onion and the tasty but foul-smelling South-East Asian Durian fruit.
Place, publisher, year, edition, pages
2015. Vol. 7, no 26, 14254-14262 p.
nanocellulose, zeolite, odor, composite, strength, colloidal processing, packaging
IdentifiersURN: urn:nbn:se:kth:diva-171892DOI: 10.1021/acsami.5b02252ISI: 000357963700011PubMedID: 26061093ScopusID: 2-s2.0-84936878296OAI: oai:DiVA.org:kth-171892DiVA: diva2:845985
QC 201508132015-08-132015-08-102015-10-28Bibliographically approved