Nanocellulose-Zeolite Composite Films for Odor Elimination
(English)Manuscript (preprint) (Other academic)
Free standing and strong odor-removing composite films of cellulose nanofibrils (CNF) with a high content of nanoporous zeolite adsorbents have been produced by colloidal processing. Thermogravimetric desorption analysis (TGA) and infrared spectroscopy combined with computational simulations showed that three commercially available zeolites- silicalite, ZSM5 and zeolite Y, have a high affinity and uptake of important odors like ethanethiol and propanethiol, also in the presence of water. Highly flexible and strong free standing zeolite-CNF films with a thickness up to 115 μm and an adsorbent loading above 80 w/w% were obtained by gelation and vacuum filtration. Zeolite-CNF films displayed high mechanical strength of up to 10 MPa. Headspace solid phase microextraction (SPME) coupled to gas chromatography- mass spectroscopy (GC-MS) analysis showed that the CNF-zeolite films can eliminate volatile thiol-based odors to concentrations below the detection ability of the human olfactory system. The odor-removing performance of the zeolite-cellulose nanofibril films could enable improved transport and storage of fruits and vegetables rich in odors, e.g. onion and the tasty but foul-smelling South-East Asian Durian fruit.
Research subject Materials Chemistry
IdentifiersURN: urn:nbn:se:su:diva-109195OAI: oai:DiVA.org:su-109195DiVA: diva2:763460