Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran.
Faculty of Physics, University of Tabriz, Tabriz, Iran.
Sci Rep. 2023 Jan 18;13(1):983. doi: 10.1038/s41598-023-27484-9.
Plasma treatment of polymeric materials is a cost-effective and efficient technique to modify the surface and change the constituent unit configuration. This research investigates the effects of argon DC glow discharge plasma on pure and DR1 dye-loaded polyamide 6 polymer films and stabilization of dye on the surface. Plasma breaks some bonds and activates the surface through creating reactive structures such as free radical sites on the surface and increases tertiary amides on the surface of polymer. Besides, this process alters surface topographical characteristics and conformation of azobenzene dye which are effective on the durability of the dye on the surface. Plasma causes interactions of the dye with the polymer and immobilizes the dye on the polymer. On the other hand, these interactions lead to changes in the dye's optical and geometric isomeric activity and stability. This work studies the chemical and morphological changes of polyamide 6 by plasma with AFM and spectroscopic methods. Furthermore, the aging of nylon 6 films loaded with DR1 dye is measured, and the conformational changes of the dye are investigated. Plasma stabilizes the dye on the polymer surface through making changes of chemical and physical properties on the surface components.
等离子体处理聚合物材料是一种经济有效的技术，可以改变表面并改变组成单元的结构。本研究探讨了氩气直流辉光放电等离子体对纯和 DR1 染料负载聚酰胺 6 聚合物薄膜的影响，以及染料在表面的稳定性。等离子体通过在表面上形成自由基等活性结构来打破一些键并激活表面，增加聚合物表面上的叔酰胺。此外，该过程改变了偶氮苯染料的表面形貌特征和构象，这对染料在表面上的耐久性有影响。等离子体使染料与聚合物相互作用，并将染料固定在聚合物上。另一方面，这些相互作用导致染料光学和几何异构活性和稳定性的变化。本工作通过原子力显微镜和光谱方法研究了等离子体对聚酰胺 6 的化学和形貌变化。此外，还测量了负载 DR1 染料的尼龙 6 薄膜的老化情况，并研究了染料的构象变化。等离子体通过改变表面成分的化学和物理性质来稳定染料在聚合物表面上。
