The Experts below are selected from a list of 21855 Experts worldwide ranked by ideXlab platform
Teofil Jesionowski - One of the best experts on this subject based on the ideXlab platform.
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Synthesis of Zinc Oxide in an Emulsion System and its Deposition on PES Nonwoven Fabrics
Fibres & Textiles in Eastern Europe, 2011Co-Authors: Teofil Jesionowski, Filip Ciesielczyk, Jadwiga Sójka-ledakowicz, Agnieszka Kołodziejczak-radzimska, Joanna Olczyk, J. SielskiAbstract:Zinc oxide precipitated from an Emulsion System was characterised by a narrow particle size distribution and large specific surface area. The product was subjected to morphological and dispersive evaluations, and its application possibilities were indicated. The precipitated zinc oxide can be used as a surface modifier of different types of textile products mainly because it shows considerable barrier properties protecting against UV radiation and antibacterial activity. These new properties open possibilities for many new applications.
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PHYSICOCHEMICAL AND STRUCTURAL PROPERTIES OF TiO2 PRECIPITATED IN AN Emulsion System
Physicochemical Problems of Mineral Processing, 2010Co-Authors: Katarzyna Siwińska-stefańska, Andrzej Krysztafkiewicz, Filip Ciesielczyk, Dominik Paukszta, Jadwiga Sójka-ledakowicz, Teofil JesionowskiAbstract:Precipitation of titania using titanium(IV) sulphate(VI) as the precursor in the Emulsion System has been studied. Tytanpol ® R-210 of the rutile type structure was used as a standard. The basic physicochemical parameters of the titanium dioxide such as bulk density, the absorption capacity of water, paraffin oil and dibutyl phthalate have been determined along with the moisture content and oil number. Morphology and dispersive characteristics of the titanium dioxide precipitated have been evaluated by the SEM and NIBS techniques. The TiO2 powders have been also studied by XRD and colorimetric method. In the Emulsion System proposed titania of rutile structure has been successfully precipitated. It has been established that the properties of the titanium dioxide obtained depend not only on the composition of the Emulsion but also on the amount of the emulsifier applied.
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influence of aminosilane surface modification and dyes adsorption on zeta potential of spherical silica particles formed in Emulsion System
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2003Co-Authors: Teofil JesionowskiAbstract:Abstract Studies were performed on the synthesis of spherical silica in an Emulsion System. The obtained silica was subjected to surface modification using N-2-(aminoethyl)-3-aminopropyltrimethoxysilane in order to increase adsorptive properties of the silica surface. On surfaces of the unmodified silica material and the aminosilane-functionalised silica C.I. Reactive Blue 19 and C.I. Acid Red 18 were adsorbed. The obtained silica and its derivatives were subjected to physicochemical evaluation: particle size and polydispersity were examined, specific surface area (BET) was determined, surface composition was defined using elemental analysis. The principal aim of the studies was to define electrokinetic (zeta) potential and determination of its alterations as a function of pH in all types of the tested silica colloids. For the purpose the technique of electrophoretic light scattering (ELS) was applied. Effect of ionic strength on stability of tested colloids was also examined. The tested aminosilane was found to exert critical influence on values of zeta potential and, thus, on values of isoelectric point (i.e.p.). The modified silicas reached peak stability within the pH range of 2–4 manifesting zeta potential within the range of (−20) to (−45) mV.
T. Haeiwa - One of the best experts on this subject based on the ideXlab platform.
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Preparation of porous thin-film polymethylsiloxane microparticles in a W/O Emulsion System
Polymer Journal, 2015Co-Authors: Shozi Mishima, Tomohiko Okada, Toshio Sakai, Ryutaro Kiyono, T. HaeiwaAbstract:Porous thin-film polymethylsiloxane microparticles have been prepared successfully from octyltrichlorosilane and methyltrichlorosilane in W/O Emulsion System by using several oil phases and changing the amount of the silanes or a surfactant Span 60.
Lianzhou Jiang - One of the best experts on this subject based on the ideXlab platform.
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impact of ultrasonic treatment on an Emulsion System stabilized with soybean protein isolate and lecithin its emulsifying property and Emulsion stability
Food Hydrocolloids, 2017Co-Authors: Shuang Bi, Baokun Qi, Zhongjiang Wang, Min Zhang, Yang Li, Lianzhou JiangAbstract:Abstract The present study aims to investigate the impact of ultrasonic treatment on the emulsifying property and Emulsion stability of an Emulsion System stabilized with soybean protein isolate (SPI) and lecithin. Ultrasonic parameters used were ultrasonic powers of 150, 300, and 450 W and ultrasonic durations of 12 and 24 min. Emulsifying properties of Emulsions were all improved with different extents after ultrasonic treatments. The Emulsion treated at 150 W & 24 min showing the best emulsifying property and Emulsion stability than the rest. However, the higher ultrasonic power of 450 W gave negative effects on Emulsion stability, with increased particle size and decreased absolute ζ-potential values due to protein aggregation. Prolonged ultrasonic duration from 12 to 24 min resulted in a more stable Emulsion under the ultrasonic power of 150 W. However, for ultrasonic powers of 300 and 450 W, the additional ultrasonic energy from prolonging ultrasonic duration from 12 to 24 min generated negative effects to Emulsion stability.
Engel G. Vrieling - One of the best experts on this subject based on the ideXlab platform.
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The synthesis of gigantic hollow silica spheres from an EO76PO29EO76 based butanol-water Emulsion System
Bulletin of the Chinese ceramic society, 2007Co-Authors: Y. Quan, Qianyao Sun, Z. Liu, Engel G. VrielingAbstract:Gigantic hollow silica spheres with hierarchical particle porosity were obtained from an EO76PO29EO76 based Emulsion System in combination with the inexpensive sodium silicate as the silica source,which is unique in its extremely rapid silica condensation and in the resulting hierarchical morphology.The samples were characterized by SEM,TEM,BET,optical microscopy,SAXS and 29Si MAS NMR.
Weiguo Song - One of the best experts on this subject based on the ideXlab platform.
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Enhancing reaction rate in a Pickering Emulsion System with natural magnetotactic bacteria as nanoscale magnetic stirring bars
Chemical science, 2018Co-Authors: Xin Zhou, Changyou Chen, Changyan Cao, Tao Song, Hengquan Yang, Weiguo SongAbstract:Pickering Emulsion is emerging as an advanced platform for catalysis because of the large oil/water interface area for reaction and its superior efficiency. How to enhance the mass transportation within the micro-droplets is the biggest obstacle in further improving the efficiency of the Pickering Emulsion System. In this study, we propose and solve this problem for the first time using natural magnetotactic bacteria as nanoscale magnetic stirring bars, which can be encapsulated into each micro-droplet and used to stir the solution to accelerate the mass transportation under an external magnet, and thus significantly enhance the reaction rate of Pickering Emulsion. Taking the epoxidation of cyclooctene in the Pickering Emulsion System as a demonstration, the reaction rate was enhanced three times with nanoscale magnetic stirring bars compared to that of traditional Pickering Emulsion, and was even thirty times higher than that of conventional stirrer-driven biphasic Systems. We envision that this strategy will bring biphasic reactions with fundamental innovations toward more green, efficient and sustainable chemistry.