UV- and γ-sensitization of latent tracks in polyethylene terephthalate

Vilensky, A. I.; Zagorski, D.L.; Kabanov, V.Ya.; Mchedlishvili, B. V.

doi:10.1016/s1350-4487(03)00109-4

Cited by 20 publications

(14 citation statements)

References 6 publications

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“…Such groups may attach to macromolecules and thus accumulate inside the track and be responsible for the negative charges in the electrolyte‐soaked tracks . Moreover, some of the radiolysis products can be either released as small gas molecules or extracted as fragments with water from the polymer film . Summing up, we speculate that negatively charged pores form within the latent tracks that exhibit ionic transport.…”

Section: Resultsmentioning

confidence: 81%

“…It is well known that UV treatment sensitizes latent tracks for quick chemical etching in the conventional track‐etching method. Such effect has been suggested to result from UV induced photodecomposition of the damaged molecules in the latent track, in company with the release of gas molecules during UV exposure and the wash out of fragments during subsequent water immersion (Figure a). We anticipate that sufficient long UV treatment might help to form a nanochannel inside the latent track.…”

Section: Resultsmentioning

confidence: 99%

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Highly Selective Ionic Transport through Subnanometer Pores in Polymer Films

Yan

Liu

et al. 2016

Adv Funct Materials

204

189

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Novel transport phenomena through nanopores are expected to emerge as their diameters approach subnanometer scales. However, it has been challenging to explore such a regime experimentally. Here, this study reports on polymer subnanometer pores exhibiting unique selective ionic transport. 12 μm long, parallel oriented polymer nanopores are fabricated in polyethylene terephthalate (PET) films by irradiation with GeV heavy ions and subsequent 3 h exposure to UV radiation. These nanopores show ionic transport selectivity spanning more than 6 orders of magnitude: the order of the transport rate is Li+>Na+>K+>Cs+>>Mg2+>Ca2+>Ba2+, and heavy metal ions such as Cd2+ and anions are blocked. The transport can be switched off with a sharp transition by decreasing the pH value of the electrolyte. Structural measurements and molecular dynamics simulations suggest that the ionic transport is attributed to negatively charged nanopores with pore radii of ≈0.3 nm, and the selectivity is associated with the dehydration effect.

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Section: Resultsmentioning

confidence: 81%

Section: Resultsmentioning

confidence: 99%

Highly Selective Ionic Transport through Subnanometer Pores in Polymer Films

Yan

Liu

et al. 2016

Adv Funct Materials

204

189

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“…Bulk polymers with lower molecular weights will dissolve more rapidly because of their shorter chain lengths [3], resulting in a region with many chain ends. However, it is well established that polymers can be degraded by UV irradiation, and many previous studies have indicated that UV irradiation will affect the bulk etch and track etch responses and the sensitivity of CR-39 polymeric track detectors [4][5][6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Ultraviolet radiation-induced modifications of the optical and registration properties of a CR-39 nuclear track detector

Saad

Al-Faitory

Hussein

et al. 2015

Nuclear Instruments and Methods in Physics Research Section B:

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“…Polymeric etched track membranes are thin polymer films with discrete pores which are formed through a combination of heavy ion bombardment and chemical etching. The pore size, shape and density can be varied in a controllable manner 1, 2. Track membranes have diverse applications in biotechnology, medicine, ecology, etc 3…”

Section: Introductionmentioning

confidence: 99%

“…The pore size, shape and density can be varied in a controllable manner. 1,2 Track membranes have diverse applications in biotechnology, medicine, ecology, etc. 3 Modification of such membranes can extend their possible applications.…”

Section: Introductionmentioning

confidence: 99%

Influence of pore size and pore shape on thermo‐sensitive properties of poly[(ethylene terephthalate)‐graft‐(N‐isopropylacrylamide)] track membranes

Liu

Yang

Chen

et al. 2009

Polymer International

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BACKGROUND: The main aim of this work was to prepare poly[(ethylene terephthalate)‐graft‐(N‐isopropylacrylamide)] (PET‐graft‐NIPAAm) track membranes with various pore shapes and pore sizes, and to investigate the influence of pore shape and pore size on the thermo‐sensitive properties of the membranes. The PET‐graft‐NIPAAm track membranes were prepared using UV illumination, chemical etching and γ‐irradiation polymerization. Their thermo‐sensitive properties were investigated using conductimetry. RESULTS: PET track membranes with four kinds of pore shapes and sizes were prepared using chemical etching by changing the UV illumination time. After γ‐irradiation, NIPAAm was grafted into the etched PET track membranes both inside the pores and on the membranes. Conductimetric measurements showed that only membranes with appropriate pore shape and pore size had thermo‐sensitive properties. When the grafting ratio was 5 wt%, membranes with both small double cone‐shaped pores and with very large cylinder‐shaped pores showed no thermo‐sensitive properties. CONCLUSION: Along with the grafting ratio, the pore shape and pore size also have an influence on the thermo‐sensitive properties of PET‐graft‐NIPAAm track membranes. Copyright © 2009 Society of Chemical Industry

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UV- and γ-sensitization of latent tracks in polyethylene terephthalate

Cited by 20 publications

References 6 publications

Highly Selective Ionic Transport through Subnanometer Pores in Polymer Films

Highly Selective Ionic Transport through Subnanometer Pores in Polymer Films

Ultraviolet radiation-induced modifications of the optical and registration properties of a CR-39 nuclear track detector

Influence of pore size and pore shape on thermo‐sensitive properties of poly[(ethylene terephthalate)‐graft‐(N‐isopropylacrylamide)] track membranes

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