Fajstavr Dominik, Frýdlová Bára, Rimpelová Silvie, Kasálková Nikola Slepičková, Sajdl Petr, Švorčík Václav, Slepička Petr
Department of Solid State Engineering, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic.
Department of Biochemistry and Microbiology, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic.
Materials (Basel). 2022 Jan 22;15(3):839. doi: 10.3390/ma15030839.
A polydimethylsiloxane (PDMS) composite with multi-walled carbon nanotubes was successfully prepared. Composite foils were treated with both plasma and excimer laser, and changes in their physicochemical properties were determined in detail. Mainly changes in surface chemistry, wettability, and morphology were determined. The plasma treatment of PDMS complemented with subsequent heating led to the formation of a unique wrinkle-like pattern. The impact of different laser treatment conditions on the composite surface was determined. The morphology was determined by AFM and LCM techniques, while chemical changes and chemical surface mapping were studied with the EDS/EDX method. Selected activated polymer composites were used for the evaluation of antibacterial activity using Gram-positive () and Gram-negative () bacteria. The antibacterial effect was achieved against on pristine PDMS treated with 500 mJ of laser energy and PDMS-C nanocomposite treated with a lower laser fluence of 250 mJ. Silver deposition of PDMS foil increases significantly its antibacterial properties against , which is further enhanced by the carbon predeposition or high-energy laser treatment.
成功制备了一种含有多壁碳纳米管的聚二甲基硅氧烷（PDMS）复合材料。对复合箔进行了等离子体和准分子激光处理，并详细测定了它们的物理化学性质变化。主要测定了表面化学、润湿性和形态的变化。PDMS的等离子体处理辅以随后的加热导致形成独特的皱纹状图案。确定了不同激光处理条件对复合材料表面的影响。通过原子力显微镜（AFM）和激光共聚焦显微镜（LCM）技术确定形态，同时用能谱/能量色散X射线（EDS/EDX）方法研究化学变化和化学表面映射。使用革兰氏阳性（）和革兰氏阴性（）细菌对选定的活性聚合物复合材料进行抗菌活性评估。在用500 mJ激光能量处理的原始PDMS和用250 mJ较低激光通量处理的PDMS-C纳米复合材料上对实现了抗菌效果。PDMS箔的银沉积显著提高了其对的抗菌性能，碳预沉积或高能激光处理进一步增强了该性能。
