| Abstract [eng] |
Modern industry and science are no longer imaginable without new and innovative materials that can open up a variety of possibilities for new processes. Recently, most of these innovations include micro- and nano-levels. These levels aim to change material characteristics or rotate structures that could be used in microhydraulics and other fields. In the production of these structures, it is important to ensure a stable production process, orderly structure and constant characteristics, therefore, the aim of this work is to produce an alumina nanomembrane and to perform laminar flow and acoustic pressure analyzes. A stand was made during the research. The purpose of the stand is to ensure the necessary conditions for the alumina nanomembrane production process. The object of the study: alumina nanomembrane. The purpose of the study: to produce an alumina nanomembrane for use in microhydraulic devices for filtration of microparticles. The results of the study: identified three main possible methods for controlling the flow of microhydraulic fluid: using a hydrostatic differential pressure, pump or a syringe pump. The production of the membrane requires proper preparation of the workpiece - a pure aluminum plate is used, which must be properly prepared by dry cleaning, annealing and polishing. The successfully obtained workpiece is subjected to anodizing and dry cleaning. An experimental alumina production stand was developed and tested for the anodizing process. It has been found that the produced alumina production stand cools five hundred milliliters of twenty degrees Celsius liquid to five degrees Celsius in ten minutes. After all the membrane manufacturing procedures, an alumina nanomembrane was produced. The alumina nanomembrane produced was found to consist of aluminum and oxygen. Using an electron microscope, the diameter of the alumina nanomembrane pores was determined, which averages two hundred nanometers in the finished workpiece. The average distance between the center of the pores is two hundred and fifty nanometers. After modulating the flow of the laminar flow, the results showed that the membrane flow per square meter at one Pascal pressure difference on different sides of the membrane is 0.0117526 l / min. Simulating the effect of acoustic pressure on the membrane, the particles focused in the center of the pair at a frequency of 3.7 GHz. It has been observed that at twice the frequency, two centering zones are formed in the pair. |
