Bica Ioan, Iacobescu Gabriela-Eugenia
Advanced Environmental Research Institute, West University of Timisoara, Bd. V. Parvan, Nr. 4, 300223 Timisoara, Romania.
Department of Physics, University of Craiova, Str. A. I. Cuza, Nr. 13, 200585 Craiova, Romania.
Materials (Basel). 2023 Feb 28;16(5):1995. doi: 10.3390/ma16051995.
In the present work, we report that the manufacturing of new environmentally friendly and low-cost materials with electrical conductivity can be roughly and finely tuned by an external magnetic field for technical and biomedical applications. With this aim in mind, we prepared three types of membranes based on cotton fabric impregnated with bee honey, carbonyl iron microparticles (CI), and silver microparticles (SmP). In order to study the influence of the metal particles and the magnetic field on the electrical conductivity of membranes, electrical devices were made. Using the "volt-amperometric" method, it was found that the electrical conductivity of the membranes is influenced by the mass ratio (mCI: mSmP) and by the B values of the magnetic flux density. It was observed that in the absence of an external magnetic field, adding microparticles of carbonyl iron mixed with silver microparticles in mass ratios (mCI: mSmP) of 1:0, 1:0.5, and 1:1 causes the electrical conductivity of the membranes based on cotton fabrics impregnated with honey to increase 2.05, 4.62, and 7.52 times, respectively, compared with that of the membrane based on cotton fabrics impregnated with honey alone. When applying a magnetic field, the electrical conductivity of the membranes with microparticles of carbonyl iron and silver increases with increasing magnetic flux density . We conclude that the membranes are very good candidates for the fabrication of devices to be used in biomedical applications due to the possibility of remote, magnetically induced release of the bioactive compounds from honey and silver microparticles into the area of interest during medical treatment.
在本研究中，我们报告了对于技术和生物医学应用而言，具有导电性的新型环保低成本材料的制造可通过外部磁场进行粗略和精细调节。出于这一目的，我们制备了三种基于浸渍有蜂蜜、羰基铁微粒（CI）和银微粒（SmP）的棉织物的膜。为了研究金属颗粒和磁场对膜导电性的影响，制作了电气装置。使用“伏安法”发现，膜的导电性受质量比（mCI: mSmP）和磁通密度的B值影响。观察到在没有外部磁场的情况下，添加质量比（mCI: mSmP）为1:0、1:0.5和1:1的羰基铁微粒与银微粒混合物，会使基于浸渍有蜂蜜的棉织物的膜的导电性分别比仅基于浸渍有蜂蜜的棉织物的膜提高2.05倍、4.62倍和7.52倍。施加磁场时，含有羰基铁和银微粒的膜的导电性随磁通密度增加而增加。我们得出结论，由于在医疗过程中生物活性化合物有可能从蜂蜜和银微粒中通过磁诱导远程释放到感兴趣区域，这些膜是制造用于生物医学应用的装置的非常好的候选材料。
