Статті
Постійне посилання колекціїhttps://dspace.nuft.edu.ua/handle/123456789/7522
Переглянути
4 результатів
Результати пошуку
Документ Energy parameters of the process of ultrafine grinding og medical and cosmetic components in the bead mill(2021) Hrininh, Kateryna; Gubenia, Oleksii; Chepeliuk, OlenaThe process of ultrafine grinding of components of medicines and cosmetics in a laboratory bead mill is considered. The purpose of the study is (1) to determine the energy parameters of the process of ultrafine grinding of medicinal and cosmetic components in a bead mill, as well as (2) to determine the dependences of changes in technological parameters. A suspension of castor oil and cosmetic pigment in a ratio of 60% oil and 40% pigment was used as a model body. A series of experiments was carried out, where the degree of grinding was determined using a microscope with a built-in camera and software, the temperature was measured with ds18b20 temperature sensors, the power was measured with a three-phase CNFAJ Intelligent Power Meter. When grinding the pigment "red 120" for a period of time from 0 to 45 minutes, the power decreases, the temperature of the "beads-product" system increases, and the particle size decreases. This process occurs most intensively in the first 5 minutes. Most of the energy is spent on the work, which is spent on mixing the system "beads-product", and the work, that is spent on heating the structural components of the product and the parts of the mill interacting with them, which, in turn, depend on rheological properties of the suspension.Документ Energy parameters of ultrafine grinding of pharmaceutical and cosmetic ingredients in the bead mill(2020) Hrininh, Kateryna; Gubenia, OleksiiThe energy parameters of the grinding process of the components of pharmaceutical and cosmetic preparations in a bead mill are considered. The purpose of research - to determine the energy parameters of ultrafine grinding of pharmaceutical and cosmetic ingredients in the bead mill. A series of experimenters was conducted where the degree of grinding was measured using USB Digital Microscope and software, the temperature was measured with a TPM-10 electronic thermometer, and the power was measured with a CNFAJ Intelligent Power Meter three-phase wattmeter. As a result of the study, we can conclude that most of the energy is spent on the work of mixing the beadproduct system and the work spent on heating the structural components of the product and the interacting parts of the mill, which, in turn, depend on the rheological properties of the suspension.Документ Formation of suspension structure in the process of grinding in bead mills(2020) Hrininh, Kateryna; Gubenia, Oleksii; Telychkun, YuliiaIt has been investigated the rheological properties of the suspension of farmaceutical and cosmetics preparates during grinding at an experimental laboratory bead mill of periodic action. The rheological characteristics have been investigated on a rotary viscometer Reotest 2. as a result of the research, the flow curve of the suspension during grinding has been constructed and it has been found that within the investigated range the product does not change the character of flow regardless of measurement time and temperature. Analysis of the curve of the suspension during grinding revealed features which explain formation of the structure. The dependence of the effective viscosity on the shear rate during grinding of the suspension is polynomial and confirms the non Newtonian character of the product and is defined as a linear plastic body. The investigated finished product has 6.5 time’s higher viscosity in relation to pure castor oil, which is explained by the high dry matter content (40 %) and the increase in the newly formed area. The viscosity of the suspension varies depending on the temperature: cooled to 20 °C, the finished product has a viscosity of 22.5% higher than immediately after the grinding process with a temperature of 34 °CДокумент Review of the working bodies of vertical bead mills(2019) Hrininh, Kateryna; Gubenia, Oleksii; Litovchenko, IgorIt is considered existing configurations of the working members of vertical bead mills for grinding cosmetic, pharmaceutical and food products by a wet method. In standard designs of rotors with disks and / or pins, due to the presence of centrifugal forces, there is a stagnant zone in which the movement of the beads and the product is practically not observed. As a result of which the product has an uneven particle size distribution and the time spent on the process increases. the configuration of the rotor with a reduced annular gap provides a reduction in the time of grinding of solid materials in suspension, with a smaller volume of the grinding chamber.