uacoopera posted this:Ohmic heating reactor for chemical synthesis, the method and its applicationsIn ohmic heating electrical energy is dissipated in heat with a very high efficiency (electrodes in contact with the reaction medium), resulting in fast and uniform heating and in the increase of charged species movement. As in the case of the heating with microwave radiation, electrical energy is transformed into thermal energy. However, on contrary of heating with microwave radiation (penetration depth of microwave radiation in absorbing media is limited) the penetration depth is virtually unlimited and the extent of heating is regulated only by the spatial uniformity of electrical conductivity throughout the reaction medium and the time spent in the ohmic reactor. Thus, the direct scaling of the ohmic heating for the pilot or industrial scale shouldn’t have the limitations presented by microwave radiation heating. It is also possible to reduce reaction times and increase the energy efficiency of chemical reactions
Universidad de Alicante posted this:Natural hybrids nanopigments synthesis for multiple industrial applications.The Colour and Vision Research Group of the University of Alicante has been designed a new process to develop nano-structured hybrid nanopigments (from synthetic or natural dyes). These nanopigments confer improved optical, thermal, and mechanical properties when they were applied on composite materials. The nanoclays, dyes, and additives have been selected depending on the composite matrix source. Also, it has been selected the additives order in the process of synthesis, based on the material properties that would be going to improve. The parameters that could be control with this new system are: the adsorbed dye concentration, the degradation temperature of the reinforced dye, the degradation temperature of the final nanocomposite, the bending resistant modulus, and the UV-VIS colour fastness. Also, it can be controlled the optical properties as transparency and colouring power degree. It is looking for companies interested in commercial exploitation of these new colored nanomaterials.
Cracow University of Technology posted this:Suspension containing gold or silver nanoparticles or a mixture thereof and a production method thereofThe present invention relates to a process for the preparation of nanosilver and nanogold using an aqueous extract of dog rose, white grape and knotweed. Substances which were extracted from these plants act both as reducer of silver and gold ions and stabilizing agent of forming silver and gold nanodispersion, preventing them from agglomeration and inhibiting their growth, so that the resulting particle size does not exceed 100 nm.
Cracow University of Technology posted this:Novel transparent polymer nanocomposites based on PMMA and inorganic semiconductor nanoparticles for optoelectronics applicationsA method of preparing novel and transparent polymer nanocomposites based on a polymeric matrix of polymethyl methacrylate (PMMA) and the inorganic nanoparticles of zinc sulfide doped with manganese atoms (ZnS:Mn).
Cracow University of Technology posted this:Photopolymerization initiated by UV light - solutions for polymer coatings industryPhotopolymerization initiated by UV light - solutions for polymer coatings industry
Cracow University of Technology posted this:Building and Architectural Acoustics LaboratoryBuilding and Architectural Acoustics Laboratory (BAAL) is a part of Building Physics Lab. Our mission is to help architects and structural designers make their buildings acoustically better. We also help building material manufacturers to develop or improve acoustical performance in their products. We offer consulting services in the field of acoustics from the design phase until final building or product testing.
University of Vigo posted this:New non-destructive method for “in situ” monitoring of anticorrosive protection of organic coatingsThe main novelty of the device and procedure is the new portable sensor adaptable to virtually any surface. The device, fixable by vacuum to the surface under study, makes possible the measurement of the electrochemical interfacial impedance, that is the main parameter of interest for adherence quality and anti-corrosion performance.
University of Vigo posted this:Lateral connection system by removable clamps for I or H profilesThe presented system allows detachable lateral connections, at right angles, type ‘cross beam to column flange’ of I and H standard profiles made of steel. The system uses standard mounting clamps without previous specific machining operations (as may be welding or drilling).
University of Vigo posted this:Removable and reconfigurable system for corner connection of square tube profilesThis removable connection system can be adapted to the size of the section, by adjusting the length of the connecting bolts, using the same flanges. Is usable for a wide range of standard profiles, which avoids the need for a flange size for each profile section.
University of Vigo posted this:Removable system for continuous connection of square tube profilesThe removable system allows mounting on each profile separately, joining then in continuity with plates at the head of each of the flanges. The use of anti-buckling clamps prevents local buckling of the walls of the profiles, associated with tightening of flanges. Flanges have nerves to reduce stresses. The same flanges are valid for connecting different sized sections of square tube profiles.
University of Vigo posted this:New sustainable adsorbent for bleaching efficient industrial effluentsMany industries, such as those belonging to the textile, wine, and paper industry, consume huge volumes of water and, as a result, generate a large amount of contaminated water containing persistent colour pollutant compounds. These compounds represent an environmental and health threat due to their well-known associated problems, such as carcinogenicity, toxicity and mutagenicity. Furthermore, they entail a great environmental impact when discharged in aquatic environments, perceptible at very low concentrations, creating an undesirable visual impact, which, in many cases, does not meet the degree of conformity under the current directives on the wastewater treatment for industrial effluents (Directive 91/271 / EEC). The solution proposed by the research group Chemical Engineering at the University of Vigo, is the use as adsorbent of peat, or a similar lignocellulosic material, immobilized in calcium alginate beads. This process is efficient, cheap and environmentally friendly, unlike other processes and technologies. In fact, the utilization of peat instead of activated carbon as industrial adsorbent has the advantage that peat requires no activation, unlike activated carbon, reducing operating costs. In addition, the low cost of the adsorbent would be translated into significant economic benefits. Moreover, depending on the contaminant removed from the waste effluent, the exhausted adsorbent may be used as soil fertilizer at its end of life.
University of Vigo posted this:A novel mild and efficient method to prepare ε-Caprolactam precursor of Nylon 6ε-Caprolactam, the main precursor of the synthetic fibber Nylon 6, is prepared from cyclohexanone oxime by treatment with a new salt as promoter. This procedure requires mild reaction conditions and affords excellent levels of conversion and selectivity to obtain pure ε-caprolactam. No reaction by-products are formed. The new promoter salt is cheap, no corrosive, and easy to prepare. All these characteristics makes the procedure suitable for undustrial purposes.