生物聚合物作为剂量计——一个建议

R. F. Gennari, Gilson Goveia, J. Chubaci
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引用次数: 0

摘要

辐射研究在我们日常生活的各个领域取得了进展,尽管发生了一些事件,对几名研究人员的健康造成了损害。因此,如果有人想研究辐照对材料的影响,就必须使用可以量化所受辐射的设备。剂量计对电离辐射进行量化。到目前为止,电离辐射有许多应用,许多材料可用于剂量学目的。尽管如此,人们总是在不断地寻找新材料,专注于更有效的工艺或更少的环境影响。为了剂量学的目的,材料必须对辐射敏感。近年来,许多材料都成为了研究的主题,目标是环境友好:其中,我们可以提到生物聚合物,它具有可生物降解的巨大优势。商用固态剂量计使用银活化磷酸盐玻璃用于放射光致发光(RPL)目的。该剂量计具有很大的优点,因为它在读取剂量后不会丢失剂量信息。它可以被重复读取很多次,直到退火完成重置曝光条件。它可以重复使用几次。这种剂量计的商用名称为“GD-450”(千代田科技公司)。本课课组成功提出用硅酸盐玻璃代替磷酸盐玻璃作为RPL剂量计。面对玻璃烧结高温炉的需要,决定将生物聚合物作为RPL剂量计进行测试。一旦我们的目标是有一个再生剂量计,我们使用银作为一个敏感的辐射元素。本研究分别合成了含银和不含银的两种生物聚合物。所合成的生物聚合物以淀粉和胶原蛋白为高分子基础材料。生物聚合物分析是通过显微镜和光学光谱(UV-Vis-NIR)进行的。我们观察了辐照对掺银胶原蛋白生物聚合物吸收带的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
BIOPOLYMERS AS DOSIMETERS - A PROPOSAL
The radiation study has led to advances in various areas of our everyday lives despite that several events had occurred, causing health damage to several researchers. Thus, if somebody wants to study irradiation effects on materials must use equipment that quantifies the radiation received. Dosimeters do this quantification of ionizing radiation. There are numerous applications for ionizing radiation so far, and many materials can be used for dosimetric purposes. Despite that, there is always a constant search for new materials, focusing on more efficient processes or less environmental impact. For dosimetric purposes, the material has to be radiation sensitive. Many materials have been the subject of research recently, aiming to be environment friendly: among them, we can mention biopolymers that have the great advantage of being biodegradable. A commercial solid-state dosimeter uses silver-activated phosphate glass for radiophotoluminescence (RPL) purposes. This dosimeter has an enormous advantage since it does not lose the dose information after dose reading. It can be reread many times until annealing is done to reset the exposure condition. It can be reused several times. This dosimeter is commercially available as “GD-450” (Chiyoda Technol Corporation). Our research group successfully proposed using silicate glass instead of phosphate glass as RPL dosimeters. Face to the need for a high-temperature furnace for glass sintering, and it was decided to test biopolymers as RPL dosimeters. Once our goal was to have a regenerative dosimeter, we used silver as a sensible radiation element. This work it was synthesized two biopolymers with and without adding silver to them. The biopolymers synthesized used starch and collagen as polymer base material. The biopolymers analysis was done by microscopy and by optical spectrometry (UV-Vis-NIR). We observed irradiation effects on absorption bands from biopolymer of collagen doped with silver.
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