Investigating the effect of gliding discharge plasma on polystyrene and Polyamide6 by positron annihilation lifetime spectroscopy

IF 1.6 3区工程技术 Q3 CHEMISTRY, INORGANIC & NUCLEAR Applied Radiation and Isotopes Pub Date : 2024-08-26 DOI:10.1016/j.apradiso.2024.111482

Mahdiyeh Bakhtiyari Ramezani , Effat Yahaghi

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Abstract

Polymers are widely used today and the changes in their properties are investigated by different methods such as plasma irradiation. One of the most important methods for modifying polymers is cold plasma, by which the surface properties of the polymers can be changed under atmospheric pressure. In this study, the effect of plasma on Polystyrene (PS) and Polyamide 6 (PA6) samples was investigated. Surface and depth changes of the PS and PA6 have been investigated by various experimental techniques such as Fourier Transform Infrared (FTIR), X-ray Diffraction (XRD), Field Emission Scanning Electron Microscope (FESEM), Contact Angle (CA), and Positron Annihilation Lifetime Spectroscopy (PALS). The results of Attenuated Total Reflectance (ATR)-FTIR show that the chemical bonds of PA6 have been changed, and preserved in PS in the depths. The XRD results show that there are no volume changes for chemical bands. The FESEM analysis results reveal that the plasma causes digging and creates roughness on the surface. The CA measurement confirms the FESEM results and points out an increase in hydrophobicity after plasma processing. The PALS results indicate that the free volumes of the matter are changed after plasma irradiation in the depths of PS and PA6. In addition, the plasma also causes changes in the micrometer depth.

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利用正电子湮灭寿命光谱学研究滑行放电等离子体对聚苯乙烯和聚酰胺 6 的影响

聚合物如今被广泛使用，人们通过不同的方法（如等离子体辐照）研究其特性的变化。冷等离子体是聚合物改性最重要的方法之一，通过它可以在大气压力下改变聚合物的表面特性。本研究调查了等离子体对聚苯乙烯（PS）和聚酰胺 6（PA6）样品的影响。通过傅立叶变换红外光谱 (FTIR)、X 射线衍射 (XRD)、场发射扫描电子显微镜 (FESEM)、接触角 (CA) 和正电子湮没寿命光谱 (PALS) 等多种实验技术研究了 PS 和 PA6 的表面和深度变化。衰减全反射（ATR）-FTIR 结果表明，PA6 的化学键发生了变化，并在深度中保留在 PS 中。XRD 结果表明，化学带没有发生体积变化。FESEM 分析结果表明，等离子体造成了表面的挖掘和粗糙。CA 测量证实了 FESEM 的结果，并指出等离子处理后疏水性增加。PALS 结果表明，在 PS 和 PA6 的深处，等离子辐照后物质的自由体积发生了变化。此外，等离子体还导致微米深度发生变化。

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来源期刊

Applied Radiation and Isotopes 工程技术-核科学技术

CiteScore

3.00

自引率

12.50%

发文量

406

审稿时长

13.5 months

期刊介绍： Applied Radiation and Isotopes provides a high quality medium for the publication of substantial, original and scientific and technological papers on the development and peaceful application of nuclear, radiation and radionuclide techniques in chemistry, physics, biochemistry, biology, medicine, security, engineering and in the earth, planetary and environmental sciences, all including dosimetry. Nuclear techniques are defined in the broadest sense and both experimental and theoretical papers are welcome. They include the development and use of α- and β-particles, X-rays and γ-rays, neutrons and other nuclear particles and radiations from all sources, including radionuclides, synchrotron sources, cyclotrons and reactors and from the natural environment. The journal aims to publish papers with significance to an international audience, containing substantial novelty and scientific impact. The Editors reserve the rights to reject, with or without external review, papers that do not meet these criteria. Papers dealing with radiation processing, i.e., where radiation is used to bring about a biological, chemical or physical change in a material, should be directed to our sister journal Radiation Physics and Chemistry.