Готові списки джерел за темами / Macroporous Particle-Polymer

Добірка наукової літератури з теми "Macroporous Particle-Polymer"

Автор: Grafiati

Опубліковано: 6 вересня 2023

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Статті в журналах з теми "Macroporous Particle-Polymer"

Li, Zifu, and To Ngai. "Macroporous Polymer from Core−Shell Particle-Stabilized Pickering Emulsions." Langmuir 26, no. 7 (April 6, 2010): 5088–92. http://dx.doi.org/10.1021/la903546g.

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Milošević, M., N. Pejić, Ž. Čupić, S. Anić, and Lj Kolar-Anić. "Examinations of Cross-Linked Polyvinylpyridine in Open Reactor." Materials Science Forum 494 (September 2005): 369–74. http://dx.doi.org/10.4028/www.scientific.net/msf.494.369.

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Macroporous cross-linked copolymer of 4-vinylpyridine and 25% (4:1) divinylbenzene is analyzed under open conditions, that is in a continuous well-stirred tank reactor (CSTR). With this aim the appropriate bifurcation diagram is found and the behavior of the system with and without polymer in the vicinity of the bifurcation point is used for the polymer examinations. Two different granulations of polymer are considered. Moreover, some physicochemical characteristics of the polymer, such as specific surface area, skeletal and particle density, are determined.

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Wang, Qiang, Shi Dong Wang, Hui Min Zhao, and Shu Liang Zang. "Synthesis and Characterization of Rhenium Concerned Macroporous Adsorption Resin Microspheres." Advanced Materials Research 1048 (October 2014): 511–14. http://dx.doi.org/10.4028/www.scientific.net/amr.1048.511.

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The macroporous resin is one kind of new non-ionic organic high polymer absorbent with nearly 20 years development. It takes the styrene and the acrylic ester as the monomer, divinyl benzene as the crosslinking agent, the toluene and the xylene as aperture reagents. They intersectantly linked the polymerization to form the porous skeleton structure mutually. This experiment is the utilization of aerosol polymerization method in preparation of rhenium concerned polymeric adsorbent. On research of monomer and crosslinking agent allocated proportion, dispersing agent amount used, temperature and mixing speed control, the different monomer and the crosslinking agent separately affected the synthesis different macroporous polymeric adsorbent. Also we investigated the adsorption performance quality of the different macroporous polymeric adsorbent in order to make the best particle size.

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Li, Zifu, and To Ngai. "Correction to Macroporous Polymer from Core−Shell Particle-Stabilized Pickering Emulsions." Langmuir 26, no. 20 (October 19, 2010): 16186. http://dx.doi.org/10.1021/la1034118.

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Deng, Qin, James R. Hahn, Jennifer Stasser, Jeremy D. Preston, and Gary T. Burns. "Reinforcement of Silicone Elastomers with Treated Silica Xerogels: Silica—Silicone IPNs." Rubber Chemistry and Technology 73, no. 4 (September 1, 2000): 647–65. http://dx.doi.org/10.5254/1.3547611.

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Abstract The use of silylated xerogels as reinforcing fillers in silicone elastomers was investigated. The silylated xerogels used in this study were mesoporous solids with a high degree of surface treatment and an open, interconnected high porosity. Some macropores were also present in the original xerogel particle. During compounding the original size of the xerogel particles is reduced substantially by fracture through the macroporous regions. The mesoporous regions of the xerogel are retained and exist as a uniform dispersion of filler particles in the siloxane polymer phase. The absence of a bound rubber phase, and the presence of an open porosity in the xerogel suggests reinforcement occurs via a silica—silicone interpenetrating network. This creates additional chain restrictions which lead to increases in modulus and other mechanical properties.

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Myronchuk, Valeriy, Yuliya Dzyazko, Yurii Zmievskii, Anatoliy Ukrainets, Alexander Bildukevich, Ludmila Kornienko, Ludmila Rozhdestvenskaya, and Alexey Palchik. "Organic-inorganic membranes for filtration of corn distillery." Acta Periodica Technologica, no. 47 (2016): 153–65. http://dx.doi.org/10.2298/apt1647153m.

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Organic-inorganic membranes were obtained by modification of polymer microfiltration membrane with inorganic ion-exchangers, which form secondary porosity inside macroporous substrate (zirconium hydrophosphate) or simultaneously in the macroporous substrate and active layer, depending of the particle size (from ?50 nm up to several microns). Precipitation of the inorganic constituent is considered from the point of view of Ostwald-Freundlich equation. Such processes as pressing test in deionized water and filtration of corn distillery at 1-6 bar were investigated. Theoretical model allowing to establish fouling mechanism, was applied. It was found that the particles both in the substrate and active layer prevent fouling of the membrane with organics and provide rejection of colloidal particles.

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Lorenz, Marcel, Carolina Paganini, Giuseppe Storti, and Massimo Morbidelli. "Macroporous Polymer–Protein Hybrid Materials for Antibody Purification by Combination of Reactive Gelation and Click-Chemistry." Materials 12, no. 10 (May 14, 2019): 1580. http://dx.doi.org/10.3390/ma12101580.

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Clickable core-shell nanoparticles based on poly(styrene-co-divinylbenzene-co-vinylbenzylazide) have been synthesized via emulsion polymerization. The 38 nm sized particles have been swollen by divinyl benzene (DVB) and 2,2’-azobis(2-methylpropionitrile) (AIBN) and subsequently processed under high shear rates in a Z-shaped microchannel giving macroporous microclusters (100 µm), through the reactive gelation process. The obtained clusters were post-functionalized by “click-chemistry” with propargyl-PEG-NHS-ester and propargylglicidyl ether, yielding epoxide or NHS-ester activated polymer supports for bioconjugation. Macroporous affinity materials for antibody capturing were produced by immobilizing recombinant Staphylococcus aureus protein A on the polymeric support. Coupling chemistry exploiting thiol-epoxide ring-opening reactions with cysteine-containing protein A revealed up to three times higher binding capacities compared to the protein without cysteine. Despite the lower binding capacities compared to commercial affinity phases, the produced polymer–protein hybrids can serve as stationary phases for immunoglobulin affinity chromatography as the materials revealed superior intra-particle mass transports.

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Lamprou, Alexandros, Itır Köse, Zoé Peña Aguirre, Giuseppe Storti, Massimo Morbidelli, and Miroslav Soos. "Macroporous Polymer Particles via Reactive Gelation under Shear: Effect of Primary Particle Properties and Operating Parameters." Langmuir 30, no. 46 (November 12, 2014): 13970–78. http://dx.doi.org/10.1021/la502153j.

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Boehm, Anna K., Emanuel Ionescu, Marcus Koch, and Markus Gallei. "Combining Soft Polysilazanes with Melt-Shear Organization of Core–Shell Particles: On the Road to Polymer-Templated Porous Ceramics." Molecules 24, no. 19 (September 30, 2019): 3553. http://dx.doi.org/10.3390/molecules24193553.

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The preparation of ordered macroporous SiCN ceramics has attracted significant interest and is an attractive area for various applications, e.g., in the fields of catalysis, gas adsorption, or membranes. Non-oxidic ceramics, such as SiCN, own a great stability based on the covalent bonds between the containing elements, which leads to interesting properties concerning resistance and stability at high temperature. Their peculiar properties have become more and more important for a manifold of applications, like catalysis or separation processes, at high temperatures. Within this work, a feasible approach for the preparation of ordered porous materials by taking advantage of polymer-derived ceramics is presented. To gain access to free-standing films consisting of porous ceramic materials, the combination of monodisperse organic polymer-based colloids with diameters of 130 nm and 180 nm featuring a processable preceramic polymer is essential. For this purpose, the tailored design of hybrid organic/inorganic particles featuring anchoring sites for a preceramic polymer in the soft shell material is developed. Moreover, polymer-based core particles are used as sacrificial template for the generation of pores, while the preceramic shell polymer can be converted to the ceramic matrix after thermal treatment. Two different routes for the polymer particles, which can be obtained by emulsion polymerization, are followed for covalently linking the preceramic polysilazane Durazane1800 (Merck, Germany): (i) Free radical polymerization and (ii) atom transfer radical polymerization (ATRP) conditions. These hybrid hard core/soft shell particles can be processed via the so-called melt-shear organization for the one-step preparation of free-standing particle films. A major advantage of this technique is the absence of any solvent or dispersion medium, enabling the core particles to merge into ordered particle stacks based on the soft preceramic shell. Subsequent ceramization of the colloidal crystal films leads to core particle degradation and transformation into porous ceramics with ceramic yields of 18–54%.

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Blanford, C. F., A. Stein, and C. B. Carter. "Electron Microscopy of Hierarchical Materials." Microscopy and Microanalysis 5, S2 (August 1999): 820–21. http://dx.doi.org/10.1017/s1431927600017426.

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Recent innovations in materials chemistry have allowed the preparation of “hierarchical” ceramic and polymer materials that possess features on several different size scales. One of the newest hierarchical materials are ceramics that exhibit a three-dimensional ordered array of half-micron voids. These macroporous structures are synthesized from a liquid ceramic precursor and a polymer colloidal crystal template. This template is extracted by either thermal or chemical methods leaving a structure such as the porous zirconia particle shown in Fig. 1. The final structure of these materials may be thought of as the opposite of opal: the spheres here are the voids. Ordered arrays of dielectric material like these could potentially be used as photonic crystals that interact with visible light. For the microscopist, these materials create new opportunities to study interrelated aspects such as templating, crystallization, and phase transformations.Transmission electron microscopy (TEM) was carried out on a Philips CM30 TEM equipped with a LaB6 filament and operating at 300 kV.

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