Nanocellulose鈥揨eolite Composite Films for Odor Elimination

详细信息    查看全文

• 作者：Neda Keshavarzi ; Farshid Mashayekhy Rad ; Amber Mace ; Farhan Ansari ; Farid Akhtar ; Ulrika Nilsson ; Lars Berglund ; Lennart Bergstr枚m
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：July 8, 2015
• 年：2015
• 卷：7
• 期：26
• 页码：14254-14262
• 全文大小：508K
• ISSN：1944-8252

文摘

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鈥揅NF 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 渭m thick zeolite鈥揅NF 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鈥搈ass spectroscopy (GC/MS) analysis showed that the CNF鈥搝eolite films can eliminate the volatile thiol-based odors to concentrations below the detection ability of the human olfactory system. Odor removing zeolite鈥揷ellulose 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.