| Title: | Nanocellulose-Zeolite Composite Films for Odor Elimination |
| Author(s): | Keshavarzi N; Mashayekhy Rad F; Mace A; Ansari F; Akhtar F; Nilsson U; Berglund L; Bergstrom L; |
| Address: | "daggerDepartment of Materials and Environmental Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden. double daggerDepartment of Analytical Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden. parallelWallenberg Wood Science Center, Royal Institute of Technology, KTH, SE-10044 Stockholm, Sweden. section signDivision of Materials Science, Lulea University of Technology, Lulea, SE- 97187 Sweden" |
| Journal Title: | ACS Appl Mater Interfaces |
| ISSN/ISBN: | 1944-8252 (Electronic) 1944-8244 (Linking) |
| Abstract: | "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 mum 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" |
| Keywords: | Cellulose/*chemistry Colloids Nanocomposites/*chemistry Odorants/*prevention & control Sulfhydryl Compounds/chemistry/isolation & purification Volatile Organic Compounds/chemistry/isolation & purification Zeolites/*chemistry colloidal processing composite; |
| Notes: | "MedlineKeshavarzi, Neda Mashayekhy Rad, Farshid Mace, Amber Ansari, Farhan Akhtar, Farid Nilsson, Ulrika Berglund, Lars Bergstrom, Lennart eng Research Support, Non-U.S. Gov't 2015/06/11 ACS Appl Mater Interfaces. 2015 Jul 8; 7(26):14254-62. doi: 10.1021/acsami.5b02252. Epub 2015 Jun 24" |
