电子和γ辐照对淀粉:PVA薄膜性能的影响——辐照剂量的影响

IF 0.7 4区物理与天体物理 Q4 CHEMISTRY, INORGANIC & NUCLEAR

Nukleonika Pub Date : 2021-03-01 DOI:10.2478/nuka-2021-0001

K. Cieśla, Anna Abramowska

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引用次数: 2

摘要

摘要研究了电离辐射对可降解淀粉PVA薄膜功能性能的影响。该分析与包装产品(特别是食品)的材料的可能用途有关，这些产品预计将用于辐射净化，并与辐射处理对材料的潜在改性有关。我们之前的结果表明，电离辐射对薄膜性能的影响因特定成分(淀粉:聚乙烯醇比例或底物类型不同)而异，并取决于辐照条件。然而，这些研究只考虑了在伽马室或电子束中使用25千戈瑞剂量进行的照射。因此，本研究探讨了不同剂量辐照对所选淀粉:聚乙烯醇组成的影响。通过溶液浇铸得到淀粉:PVA质量比为45:55的薄膜，并在空气中使用快电子和在氮气中使用60Co伽马射线，分别施加5、10、20、25、30、50和75 kGy的剂量辐照。膜的组成(淀粉和PVA含量不同)与辐照后UV-VIS DRS光谱中特定波段的强度之间没有规律性的依赖关系。结果表明，膜中的淀粉和PVA组分在辐照下具有很强的相互作用，并且每种组分都发生了特定的反应。未辐照的淀粉:PVA比为45:55的薄膜与辐照剂量在5-75 kGy范围内的样品的拉伸强度和杨氏模量没有特别的差异。同样，在两种情况下，未辐照膜和辐照膜的膨胀能力没有差异。然而，可以推断，随着辐射剂量的增加，在水中的溶解度增加。结果表明，使用剂量直到25kgy范围内不会导致淀粉:PVA(45:55)薄膜的所有检测特性发生本质变化。因此，淀粉:聚乙烯醇(45:55)薄膜可被认为适合包装辐射去污食品。

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The influence of electron and gamma irradiation on the properties of starch:PVA films – the effect of irradiation dose

Abstract The paper discusses the effect of ionizing radiation on the functional properties of the biodegradable starch:PVA films. The analysis is related to the possible use of the material for packing the products (particularly, food) that are predicted for radiation decontamination and to the potential modification of the material by radiation treatment. Our previous results have shown that the influence of ionizing radiation on the films’ properties varied for the specific compositions (differing in starch:PVA ratio or the type of substrates) and depended on irradiation conditions. However, these studies considered only the irradiation performed in gamma chamber or in e-beam using a dose of 25 kGy. Therefore, the present study deals with the effect of the irradiations performed using various doses on the selected promising starch:PVA composition. The films characterized by starch:PVA weight ratio of 45:55 was obtained by solution casting and irradiated with fast electrons in air and with 60Co gamma rays in nitrogen applying the doses of 5, 10, 20, 25, 30, 50, and 75 kGy. No regular dependence has been noticed between the composition of films (differing in the starch and PVA content) and the intensities of the particular bands in the UV-VIS DRS spectra after irradiation. The results indicated strong interaction of the starch and PVA components in the films and the occurrence of specific reactions in each composition upon irradiation. No special differences were observed between tensile strength and Young’s modulus of the non-irradiated films characterized by the starch:PVA ratio equal to 45:55 and the samples irradiated using doses in the range of 5–75 kGy. Similarly, no differences were observed in both cases between the swelling capability of the non-irradiated and the irradiated films. However, it can be deduced that solubility in water increased when the radiation dose increased. The results show that using the doses till the range 25 kGy does not cause an essential change of all the examined properties of the starch:PVA (45:55) films. Accordingly, starch:PVA (45:55) films might be considered suitable for packing food predicted for radiation decontamination.

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来源期刊

Nukleonika 物理-无机化学与核化学

CiteScore

2.00

自引率

0.00%

发文量

审稿时长

4-8 weeks

期刊介绍： "Nukleonika" is an international peer-reviewed, scientific journal publishing original top quality papers on fundamental, experimental, applied and theoretical aspects of nuclear sciences. The fields of research include: radiochemistry, radiation measurements, application of radionuclides in various branches of science and technology, chemistry of f-block elements, radiation chemistry, radiation physics, activation analysis, nuclear medicine, radiobiology, radiation safety, nuclear industrial electronics, environmental protection, radioactive wastes, nuclear technologies in material and process engineering, radioisotope diagnostic methods of engineering objects, nuclear physics, nuclear reactors and nuclear power, reactor physics, nuclear safety, fuel cycle, reactor calculations, nuclear chemical engineering, nuclear fusion, plasma physics etc.