Nastuta Andrei Vasile, Asandulesa Mihai, Spiridon Iuliana, Varganici Cristian-Dragos, Huzum Ramona, Mihaila Ilarion
Physics and Biophysics Education Research Laboratory (P&B-EduResLab), Biomedical Science Department, Faculty of Medical Bioengineering, "Grigore T. Popa" University of Medicine and Pharmacy Iasi, M. Kogalniceanu Str., No. 9-13, 700454 Iasi, Romania.
"Petru Poni" Institute of Macromolecular Chemistry, 41A Gr. Ghica Voda Alley, 700487 Iasi, Romania.
Materials (Basel). 2024 Apr 17;17(8):1848. doi: 10.3390/ma17081848.
Polymers are essential in several sectors, yet some applications necessitate surface modification. One practical and eco-friendly option is non-thermal plasma exposure. The present research endeavors to examine the impacts of dielectric barrier discharge atmospheric pressure plasma on the chemical composition and wettability properties of acrylonitrile butadiene styrene surfaces subject to the action of additive manufacturing. The plasma source was produced by igniting either helium or argon and then adjusted to maximize the operational conditions for exposing polymers. The drop in contact angle and the improvement in wettability after plasma exposure can be due to the increased oxygen-containing groups onto the surface, together with a reduction in carbon content. The research findings indicated that plasma treatment significantly improved the wettability of the polymer surface, with an increase of up to 60% for both working gases, while the polar index increased from 0.01 up to 0.99 after plasma treatment. XPS measurements showed an increase of up to 10% in oxygen groups at the surface of He-plasma-treated samples and up to 13% after Ar-plasma treatment. Significant modifications were observed in the structure that led to a reduction of its roughness by 50% and also caused a leveling effect after plasma treatment. A slight decrease in the glass and melting temperature after plasma treatment was pointed out by differential scanning calorimetry and broadband dielectric spectroscopy. Up to a 15% crystallinity index was determined after plasma treatment, and the 3D printing process was measured through X-ray diffraction. The empirical findings encourage the implementation of atmospheric pressure plasma-based techniques for the environmentally sustainable manipulation of polymers for applications necessitating higher levels of adhesion and specific prerequisites.
聚合物在多个领域都至关重要，但有些应用需要进行表面改性。一种实用且环保的选择是进行非热等离子体处理。本研究旨在考察介质阻挡放电大气压等离子体对增材制造作用下的丙烯腈-丁二烯-苯乙烯表面的化学成分和润湿性的影响。通过点燃氦气或氩气产生等离子体源，然后进行调整以优化聚合物处理的操作条件。等离子体处理后接触角的降低和润湿性的改善可能是由于表面含氧基团增加以及碳含量减少。研究结果表明，等离子体处理显著提高了聚合物表面的润湿性，两种工作气体处理后的润湿性提高了多达60%，而等离子体处理后极性指数从0.01增加到0.99。X射线光电子能谱测量显示，氦等离子体处理的样品表面含氧基团增加了多达10%，氩等离子体处理后增加了多达13%。观察到结构发生了显著变化，导致粗糙度降低了50%，并且等离子体处理后产生了平整效果。差示扫描量热法和宽带介电谱指出等离子体处理后玻璃化温度和熔点略有降低。等离子体处理后测定的结晶度指数高达15%，并通过X射线衍射测量了3D打印过程。这些实证结果鼓励采用基于大气压等离子体的技术，对聚合物进行环境可持续的处理，以满足需要更高附着力和特定要求的应用。
