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• W2405740053 abstract "The combination of ion track technology and chemical etching as a tool to enhancepolymer gas properties such as permeability and selectivity is regarded as an avenue to establish technology commercialization and enhance applicability. Traditionally, permeability and selectivity of polymers have been major challenges especially for gas applications. However, it is important to understand the intrinsic polymer properties in order to be able to predict or identify their possible ion-polymer interactions thus facilitate the reorientation of existing polymer structural configurations. This in turn can enhance the gas permeability and selectivity properties of the polymers. Therefore, the choice of polymer is an important prerequisite. Polyethylene terephthalate (PET) belongs to the polyester group of polymers and has been extensively studied within the context of post-synthesis modification techniques using swift heavy ion irradiation and chemical treatment which is generally referred to as ‘track-etching’. The use of track-etched polymers in the form of symmetrical membranes structures to investigate gas permeability and selectivity properties has proved successful. However, the previous studies on track-etched polymers films have been mainly focused on the preparation of symmetrical membrane structure, especially in the case of polyesters such as PET polymer films. Also, polyolefins such as polymethyl pentene (PMP) have not been investigated using swift heavy ions and chemical etching procedures. In addition, the use of ‘shielded’ material on PET and PMP polymer films prior to swift heavy ion irradiation and chemical etching to prepare asymmetrical membrane structure have not been investigated. The gas permeability and selectivity of the asymmetrical membrane prepared from swift heavy ion irradiated etched 'shielded' PET and PMP polymer films have not been determined. These highlighted limitations will be addressed in this study. The overall objective of this study was to prepare asymmetric polymeric membranes with porous surface on dense layer from two classes of polymers; (PET and PMP) in order to improve their gas permeability and selectivity properties. The research approach in this study was to use a simple and novel method to prepare anasymmetric PET and PMP polymer membrane with porous surface and dense layerby mechanical attachment of ‘shielded’ material on the polymer film before swiftheavy ion irradiation. This irradiation approach allowed for the control of swiftheavy ion penetration depth into the PET and PMP polymer film during irradiation.The procedure used in this study is briefly described. Commercial PET and PMPpolymer films were mechanically ‘shielded’ with aluminium and PET foilsrespectively. The ‘shielded’ PET polymer films were then irradiated with swiftheavy ions of Xe source while ‘shielded’ PMP polymer films were irradiated withswift heavy ions Kr. The ion energy and fluence of Xe ions was 1.3 MeV and 106respectively while the Kr ion energy was 3.57 MeV and ion fluence of…" @default.
• W2405740053 created "2016-06-24" @default.
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• W2405740053 date "2015-01-01" @default.
• W2405740053 modified "2023-09-25" @default.
• W2405740053 title "Swift heavy ion irradiation of polyester and polyolefin polymeric film for gas separation application" @default.
• W2405740053 hasPublicationYear "2015" @default.
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