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      Polymeric Supports for Controlled Release of Ethylene for Food Industry


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          In modern fruit supply chain a common method to trigger ripening is to keep fruits inside special chambers and initiate the ripening process through administration of ethylene. Ethylene is usually administered through cylinders with inadequate control of its final concentration in the chamber. The aim of this study is the development of intelligent polymeric supports able to accurately regulate ethylene concentration in the atmosphere where fruits are preserved. Two different technologies were proposed: a polymeric (PEGDA) film and a polymeric (PLA) bag filled with inclusion complex of ethylene/α-cyclodextrin. The complex was prepared by molecular encapsulation which allows the entrapment of ethylene into the cavity of α-cyclodextrin. After encapsulation, ethylene can be gradually released from the inclusion complex and its release rate can be regulated by temperature and humidity. Intelligent polymeric film was prepared by dispersing inclusion complex into a thin polymeric film produced by UV-curing. Intelligent polymeric bag was made by inserting inclusion complex into heat sealed bag. The kinetics of ethylene release was studied for both systems, showing that it can effectively possible to control the release of ethylene within confined volume. Furthermore, modelling and simulations of ethylene release in a food container were made, demonstrating that it is possible to modulate release rate and, thus, control ripening.

          Most cited references18

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          Ethylene biosynthesis and action in tomato: a model for climacteric fruit ripening.

          Elucidating the mechanisms involved in ripening of climacteric fruit and the role that ethylene plays in the process are key to understanding fruit production and quality. In this review, which is based largely on research in tomato, particular attention is paid to the role of specific isoforms of ACC synthase and ACC oxidase in controlling ethylene synthesis during the initiation and subsequent autocatalytic phase of ethylene production during ripening. Recent information on the structure and role of six different putative ethylene receptors in tomato is discussed, including evidence supporting the receptor inhibition model for ripening, possible differences in histidine kinase activity between receptors, and the importance of receptor LeETR4 in ripening. A number of ethylene-regulated ripening-related genes are discussed, including those involved in ethylene synthesis, fruit texture, and aroma volatile production, as well as experiments designed to elucidate the ethylene signalling pathway from receptor through intermediate components similar to those found in Arabidopsis, leading to transcription factors predicted to control the expression of ethylene-regulated genes.
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            Kinetic Study and New Applications of UV Radiation Curing

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              Photoinitiated crosslinking polymerisation

              C Decker (1996)

                Author and article information

                International Polymer Processing
                Carl Hanser Verlag
                18 November 2016
                : 31
                : 5
                : 570-576
                1 Department of Applied Science and Technology, Politecnico di Torino, Torino, Italy
                2 Tecnogranda S.p.A., Dronero, Italy
                3 Department of Chemistry and NIS Interdepartmental Centre, Università degli Studi di Torino, Torino, Italy
                Author notes
                [* ] Correspondence address, Mail address: Roberto Pisano, Politecnico di Torino, Department of Applied Science and Technology, Corso Duca degli Abruzzi 24, 10129 Torino, Italy. E-mail: roberto.pisano@ 123456polito.it
                © 2016, Carl Hanser Verlag, Munich
                : 29 December 2015
                : 14 March 2016
                Page count
                References: 21, Pages: 7
                Special Issue Contributions

                Polymer science,Materials technology,Materials characterization,General engineering,Polymer chemistry


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