Bacteriostatic Substrate by Conductivity Method and Electric Spark Discharge Method Combined with Electrospinning for Silver Dressing

Abstract

This study uses the conductivity method, Electric Spark Discharge Method, and the electrospinning technique to develop a better silver-based antibacterial agent. The preparation process is free of chemical substances and also conforms to the green energy-saving process. The silver iodide was prepared in an iodine agar medium by using the conductivity method. Multiple bacteriostasis experiments showed that the molds grew in the position with iodine of the culture medium after 6 days, as well as in the position with silver iodide after 10 days. The results prove that silver iodide has better bacteriostatic ability than povidone iodine. The nanosilver colloid was prepared in the PVA solution by using the Electric Spark Discharge Method. UV-Vis, Zetasizer, and SEM-EDX analyses proved that the PVA solution contained nanosilver colloid with good suspension stability. Finally, the electrospinning technique was used to spin the PVA solution with nanosilver colloid into the PVA nanofibrous membrane. According to UV-Vis analysis, the absorption peak of this nanofibrous membrane is about 415 nm, meaning this nanofibrous membrane contains nucleate nanosilver colloid, and is very suitable for antiseptic dressing.

Stability analysis of platinum nanoparticles prepared by ESDM in deionised water

“…Although it could increase the concentration of colloid, the average size of nanoparticles became larger. When the discharge began, the distance between anode and cathode approached gradually to 30 μm, which is arc discharge [16], as shown in Fig. 3.…”

“…Deionised water (DI water) was used as dielectric fluid, and platinum wire was used as material. Without adding any chemicals, platinum nanocolloid with an average size of <10 nm can be prepared in a green process [16]. The suspension stability (i.e.…”

A Study of Photocatalysis of Methylene Blue of TiO2 Fabricated by Electric Spark Discharge Method

“…As it only requires DI water and the metal to be prepared, it can be implemented at 1 atm and normal temperature [17,18]. Its principle is that when the distance between the upper and lower electrodes (metallic Ti in this paper) of an electrical discharge machine is 30 m, the outshoot on the Ti surface generates arc, which is known as electrical spark [19], as shown in Figure 1(a). As its temperature is as high as 8000 k [20], it melts the electrode surface and generates metal nanoparticles, as shown in Figure 1(b).…”

Novel electrical discharge machining system with real-time control and monitoring for preparing nanoiron colloid

“…Compared with the chemical method, this method has the advantages of the simple process, fast and green preparation. In recent years, many literatures have used this method to prepare nanometal colloid; [10][11][12][13] however, the device used in such research is an expensive industrial-grade electrical discharge machining (EDM), costing at least US$34,000; thus, how to improve the design of the EDM to reduce the cost of the machine and tools has become a subject that uses ESDM to prepare nanometals. These studies have mainly used visual inspection and manual adjustment to align electrodes.…”