#Non newtonian fluid portable#

This research investigated how the variation of temperature and shear rate affects the viscosity of ethanol gel propellants that use methyl cellulose as gellant and, in parts, use boron as energetic additive. By critically analyzing all the data obtained, a new temperature control was created, which proved to be extremely efficient, reducing the amount of scrap and electric energy consumed.

#Non newtonian fluid portable#

Through thermographic imaging and data collection with a portable device (Arduino UNO) connected to sensors and modules, experimental data related to the temperature distribution was analyzed together with the numerical analysis. The vulcanization and rheological properties of the rubber compound were studied to support numerical analysis data. To improve the production process of cap ply, a CFD (Computational Fluid Dynamics) analysis was performed to study the flow of the rubber compound inside the extruder head by using two different temperature controls. These defects compromise the overall quality of the tire, as well as its safety features to its user. When the extrusion phase of the rubber compound is poorly controlled, the cap ply belts show premature vulcanization or lack of impregnation signs. The cap ply is manufactured by a process where polyamide cords are impregnated with a rubber compound, which is extruded. Between the tire tread and steel belts, a cap ply layer is used to restrict the tire’s expansion due to centrifugal forces. They are a composite structure formed by multiple layers of different materials such as rubber compounds, steel wires and polyamide cords. Also, in the automotive industry, they play a key role. Tires are a highly relevant component in the industry of global mobility. These results show the feasibility of manufacturing a chitosan gel usable as a pill swallowing gel for patients with dysphagia. Lastly, all gels were physically stable after a month of storage in the stress condition. The chitosan gel delayed the tablet disintegration time by about 3–7 min and slightly affected the theophylline dissolution rate. Finally, using a theophylline tablet as a model tablet dosage form, we assessed the gel’s effect on drug disintegration and dissolution. Even though the reference product could carry the pill in the tube faster, the chitosan gel better covered the pill, making it more convenient to use. The developed chitosan gel had enhanced flow ability it allowed the pill to cross a 300 mm tube within 6 s, while the reference product took 3 s. The developed pill swallowing gel’s rheology was pseudoplastic with a viscosity of 73.74 ± 3.20 Pa⸱s. We found that the optimized gel formulation was 6.25% (w/w) chitosan with a molecular weight of 80–120 kDa dissolved in 1.2% acetic acid and 4% (w/w) glycerin.

We then added several portions of glycerin as the glidant of the formulation. We formulated gels by dissolving different concentrations of carboxymethyl cellulose and low or high molecular weight chitosan in solvents to find appropriate gel rheology properties. Therefore, this study aimed to develop and investigate pill swallowing aid gels prepared from carboxymethyl cellulose and chitosan. Existing products are expensive and do not suit all geriatric patients. Many pharmaceutical companies search for new products to serve as swallowing aids. Therefore, dysphagia might reduce compliance with oral drug administration in the aging population. It is common among the elderly with chronic diseases who need to take drugs for long periods. This work confirmed the presented laboratory-scale milling process as a promising method to study the processing of hydroxyapatite-filled slurries, as a first-step product, on the manufacture of hydroxyapatite microspheres for the powder bed fusion industry.ĭysphagia refers to difficulty swallowing certain foods, liquids, or pills. For the studied material, the use of a fast stirrer speed, smaller grinding media size, and higher solids concentration increased the energy efficiency. Milling chamber, bead wear, and energy consumption were evaluated and minimized, finding the most efficient operating parameter setting for the process. A Darvan C dispersant agent dosage of 2.1 mg m⁻² (active component) to the specific surface of the ceramic was found, through stability and rheological analyses, to be the most outstanding dosage for stabilizing the dispersion. This size range is preferable to produce spherical feedstock for powder bed fusion technologies through the atomisation process. Our goal is to find the optimal parameters to obtain particulate suspensions within a 0.2–1.5 μm particle size range. The present work deals with the use of stirred bead milling process to tune the hydroxyapatite particles size adjusting the process conditions.