Journal articles: 'Electrosteric stabilization'

1

Sung, An-Min, and Irja Piirma. "Electrosteric Stabilization of Polymer Colloids." Langmuir 10, no. 5 (May 1994): 1393–98. http://dx.doi.org/10.1021/la00017a014.

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Fritz, Gerhard, Volker Schädler, Norbert Willenbacher, and Norman J. Wagner. "Electrosteric Stabilization of Colloidal Dispersions." Langmuir 18, no. 16 (August 2002): 6381–90. http://dx.doi.org/10.1021/la015734j.

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3

Einarson, Maryann B., and John C. Berg. "Electrosteric Stabilization of Colloidal Latex Dispersions." Journal of Colloid and Interface Science 155, no. 1 (January 1993): 165–72. http://dx.doi.org/10.1006/jcis.1993.1022.

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4

Jacob, Jessie, Stéphane Grelier, Maïlys Grau, and Blandine Chorein. "Effect of Dispersing Agents on the Stability of Recycled Paints." Coatings 12, no. 11 (November 11, 2022): 1722. http://dx.doi.org/10.3390/coatings12111722.

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In a circular economy approach, paint waste is recycled and reformulated to be transformed into new paints. In this regard, the lifespan of recycled paints must be properly assessed and extended beyond their preliminary specifications. This study aimed to improve the stability of waterborne acrylic paints by adding dispersing agents. Seventeen dispersing agents were added to two formulations of recycled paints: one stable, and one showing signs of instability. Their stability was characterized by analytical centrifugation and quantification of the supernatant. Among the tested dispersing agents, four showed a significant improvement in stability in both tests. These dispersants belong to the four possible categories of stabilization mechanisms: electrostatic, steric, electrosteric, and controlled stabilization. Electrosteric dispersing agents are especially effective in both paints. The combination of two dispersants does not have a synergistic effect.

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Romero-Cano, M. S., A. Martín-Rodríguez, and F. J. de las Nieves. "Electrosteric Stabilization of Polymer Colloids with Different Functionality." Langmuir 17, no. 11 (May 2001): 3505–11. http://dx.doi.org/10.1021/la001659l.

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Hang, Jianzhong, Liyi Shi, Xin Feng, and Lin Xiao. "Electrostatic and electrosteric stabilization of aqueous suspensions of barite nanoparticles." Powder Technology 192, no. 2 (June 2009): 166–70. http://dx.doi.org/10.1016/j.powtec.2008.12.010.

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7

Willmann, Ann-Cathrin, Kai Berkenfeld, Thilo Faber, Herbert Wachtel, Georg Boeck, and Karl G. Wagner. "Itraconazole Nanosuspensions via Dual Centrifugation Media Milling: Impact of Formulation and Process Parameters on Particle Size and Solid-State Conversion as Well as Storage Stability." Pharmaceutics 14, no. 8 (July 22, 2022): 1528. http://dx.doi.org/10.3390/pharmaceutics14081528.

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Nanocrystal suspensions proved to be a potent enabling principle for biopharmaceutics classification system class II drugs with dissolution limited bioavailability. In the example of itraconazole (ITZ) as a model drug combined with electrosteric stabilization using hydroxypropyl cellulose (HPC-SL), sodium dodecyl sulfate (SDS) and polysorbate 80 (PS80), the impacts of formulation and process parameters of a dual centrifugal mill on material attributes such as particle size, zeta potential, particle morphology, storage stability and especially solid-state characteristics were evaluated. A minimal concentration of 0.9% (w/w) HPC-SL, 0.14% (w/w) SDS and 0.07% (w/w) PS80 was necessary for sufficient nanoparticle stabilization. Despite the minor effect of PS80, its presence was beneficial for electrosteric stabilization. Choosing lower stabilizer concentrations resulted in a pronounced increase in particle size due to agglomeration, which was confirmed by SEM imaging and a decrease in zeta potential in combination with an amorphization of the particles. Milling temperature had no significant impact on the particle size, whereas milling speed and the size of the milling beads used were found to have a strong impact on the critical material attributes such as particle size and polydispersity index. The smallest particle sizes could be obtained by using the smallest milling bead size. However, the smallest obtainable particle size could only be achieved by using two-fold stabilizer concentrations, as smaller particles exhibit a larger specific surface area.

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Shojai, F., A. B. A. Pettersson, T. Mäntylä, and J. B. Rosenholm. "Electrostatic and electrosteric stabilization of aqueous slips of 3Y–ZrO2 powder." Journal of the European Ceramic Society 20, no. 3 (March 2000): 277–83. http://dx.doi.org/10.1016/s0955-2219(99)00173-9.

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9

Yeap, Swee Pin, Abdul Latif Ahmad, Boon Seng Ooi, and JitKang Lim. "Electrosteric Stabilization and Its Role in Cooperative Magnetophoresis of Colloidal Magnetic Nanoparticles." Langmuir 28, no. 42 (October 15, 2012): 14878–91. http://dx.doi.org/10.1021/la303169g.

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Kong, Hyun-Joon, Stacy G. Bike, and Victor C. Li. "Development of a self-consolidating engineered cementitious composite employing electrosteric dispersion/stabilization." Cement and Concrete Composites 25, no. 3 (April 2003): 301–9. http://dx.doi.org/10.1016/s0958-9465(02)00057-4.

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SARRAF, Hamid, and Reinhard HERBIG. "Electrokinetic sonic amplitude measurement of concentrated alumina suspensions: Effect of electrosteric stabilization." Journal of the Ceramic Society of Japan 116, no. 1357 (2008): 928–34. http://dx.doi.org/10.2109/jcersj2.116.928.

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12

Rufier, Chantal, Mathias Reufer, Hervé Dietsch, and Peter Schurtenberger. "Single Step Hybrid Coating Process to Enhance the Electrosteric Stabilization of Inorganic Particles." Langmuir 27, no. 11 (June 7, 2011): 6622–27. http://dx.doi.org/10.1021/la200525u.

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Milkova, Viktoria. "Electrosteric stabilization of oil/water emulsions by adsorption of chitosan oligosaccharides—An electrokinetic study." Carbohydrate Polymers 265 (August 2021): 118072. http://dx.doi.org/10.1016/j.carbpol.2021.118072.

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14

Lee, Seungjun, Jaehoo Lee, and Nongmoon Hwang. "Effect of the Dispersion State in Y5O4F7 Suspension on YOF Coating Deposited by Suspension Plasma Spray." Coatings 11, no. 7 (July 9, 2021): 831. http://dx.doi.org/10.3390/coatings11070831.

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The stable Y5O4F7 suspension for dense yttrium oxyfluoride (YOF) coating by suspension plasma spraying (SPS) was developed. Electrostatically and electrosterically stabilized aqueous Y5O4F7 suspensions were prepared and compared with a commercially available Y5O4F7 suspension without dispersant. The wettability and dispersibility of the Y5O4F7 suspensions were evaluated in terms of the zeta potential, average particle size, and size distribution with electrophoretic light scattering (ELS) and dynamic light scattering (DLS). The viscosity was measured and the sedimentation was tested to examine the fluidity and stability of the Y5O4F7 suspensions. When electrostatic (BYK-154) and electrosteric (BYK-199) dispersants were added to the Y5O4F7 suspension, the isoelectric point (IEP) of Y5O4F7 particles in the suspension shifted to lower pH. The zeta potential of both of electrostatically and electrosterically stabilized Y5O4F7 suspensions were higher than ±40 mV at pH of 8.6, respectively, which were much higher than of the Y5O4F7 suspension without dispersant. Meanwhile, the average particle size of the electrosterically stabilized Y5O4F7 suspension was much smaller than that of the electrostatically stabilized one. The electrosteric stabilization had a great effect on improving the wettability and dispersibility of the Y5O4F7 suspension. The coating rate of the electrosterically stabilized Y5O4F7 suspension was the highest among the three tested suspensions. In addition, the YOF coating deposited with the electrosterically stabilized Y5O4F7 suspension had the highest hardness and the lowest porosity.

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15

Meyer, Anja, Kerstin Lenzner, and Annegret Potthoff. "Influence of Energy Input on Suspension Properties." Advances in Science and Technology 62 (October 2010): 141–46. http://dx.doi.org/10.4028/www.scientific.net/ast.62.141.

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Electrosteric stabilization of a commercially available boehmite powder in water was investigated to perform milling experiments and reduce the particle size to the nanoscale range. The effect of three sodium polyacrylate dispersants (Na-PA) with different molar masses (2,100, 8,000, 15,000 g/mol) on the suspension properties before and after milling experiments was assessed by electroacoustic measurements in comparison with rheological tests. A significant loss of the stabilizing effect of the sodium polyacrylates due to the application of mechanical energy was detectable. Measurements of the adsorbed amount of the dispersants after milling via detection of the COD in the background solution show a considerable desorption from the particle surface. Accessorily performed analyses of the molar mass of the polymers yielded a destruction of the polymer chains due to the mechanical energy.

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16

Zerafati Shoja, Fariba, Hudsa Majidian, and Leila Nikzad. "Effect of dispersion states (electrostatic/electrosteric stabilization) on particles arrangement in the yttria‐stabilized zirconia sediments." International Journal of Applied Ceramic Technology 18, no. 4 (April 22, 2021): 1174–82. http://dx.doi.org/10.1111/ijac.13766.

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17

Vorwerg, Lars, and Robert G. Gilbert. "Electrosteric Stabilization with Poly(Acrylic) Acid in Emulsion Polymerization: Effect on Kinetics and Secondary Particle Formation." Macromolecules 33, no. 18 (September 2000): 6693–703. http://dx.doi.org/10.1021/ma0003607.

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18

Amoresi, Rafael A. C., Vinícius Teodoro, Guilhermina F. Teixeira, Maximo S. Li, Alexandre Z. Simões, Leinig A. Perazolli, Elson Longo, and Maria A. Zaghete. "Electrosteric colloidal stabilization for obtaining SrTiO3/TiO2 heterojunction: Microstructural evolution in the interface and photonics properties." Journal of the European Ceramic Society 38, no. 4 (April 2018): 1621–31. http://dx.doi.org/10.1016/j.jeurceramsoc.2017.10.056.

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19

Pettersson, Alf, Gonzalo Marino, Antti Pursiheimo, and Jarl B. Rosenholm. "Electrosteric Stabilization of Al2O3, ZrO2, and 3Y–ZrO2 Suspensions: Effect of Dissociation and Type of Polyelectrolyte." Journal of Colloid and Interface Science 228, no. 1 (August 2000): 73–81. http://dx.doi.org/10.1006/jcis.2000.6939.

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20

Kong, Hyun Joon, Stacy G. Bike, and Victor C. Li. "Electrosteric stabilization of concentrated cement suspensions imparted by a strong anionic polyelectrolyte and a non-ionic polymer." Cement and Concrete Research 36, no. 5 (May 2006): 842–50. http://dx.doi.org/10.1016/j.cemconres.2006.02.012.

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21

Piacenza, Elena, Alessandro Presentato, Francesco Ferrante, Giuseppe Cavallaro, Rosa Alduina, and Delia F. Chillura Martino. "Biogenic Selenium Nanoparticles: A Fine Characterization to Unveil Their Thermodynamic Stability." Nanomaterials 11, no. 5 (May 1, 2021): 1195. http://dx.doi.org/10.3390/nano11051195.

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Among the plethora of available metal(loid) nanomaterials (NMs), those containing selenium are interesting from an applicative perspective, due to their high biocompatibility. Microorganisms capable of coping with toxic Se-oxyanions generate mostly Se nanoparticles (SeNPs), representing an ideal and green alternative over the chemogenic synthesis to obtain thermodynamically stable NMs. However, their structural characterization, in terms of biomolecules and interactions stabilizing the biogenic colloidal solution, is still a black hole that impairs the exploitation of biogenic SeNP full potential. Here, spherical and thermodynamically stable SeNPs were produced by a metal(loid) tolerant Micrococcus sp. Structural characterization obtained by Scanning Electron Microscopy (SEM) revealed that these SeNPs were surrounded by an organic material that contributed the most to their electrosteric stabilization, as indicated by Zeta (ζ) potential measurements. Proteins were strongly adsorbed on the SeNP surface, while lipids, polysaccharides, and nucleic acids more loosely interacted with SeNMs as highlighted by Fourier Transform Infrared Spectroscopy (FTIR) and overall supported by multivariate statistical analysis. Nevertheless, all these contributors were fundamental to maintain SeNPs stable, as, upon washing, the NM-containing extract showed the arising of aggregated SeNPs alongside Se nanorods (SeNRs). Besides, Density Functional Theory (DFT) calculation unveiled how thiol-containing molecules appeared to play a role in SeO32− bioreduction, stress oxidative response, and SeNP stabilization.

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22

Song, J., Y. N. Tan, D. Jańczewski, M. A. Hempenius, J. W. Xu, H. R. Tan, and G. J. Vancso. "Poly(ferrocenylsilane) electrolytes as a gold nanoparticle foundry: “two-in-one” redox synthesis and electrosteric stabilization, and sensing applications." Nanoscale 9, no. 48 (2017): 19255–62. http://dx.doi.org/10.1039/c7nr04697a.

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23

Thonglerth, P., P. Sujaridworakun, and O. Boondamnoen. "Preparation of ZnO Nanoparticles Water-based Dispersion." Journal of Physics: Conference Series 2175, no. 1 (January 1, 2022): 012029. http://dx.doi.org/10.1088/1742-6596/2175/1/012029.

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Abstract In this work, an attempt was made to stabilize ZnO NPs as water-based dispersion. The dispersing agents used are 3-glycidoxypropyltrimethoxysilane (GPTMS), polyvinyl alcohol (PVA) and oleic acid (OA). These dispersing agents were combined with sodium dodecyl sulfate (SDS) to facilitate better dispersion stability. Different wt% content of modified ZnO NPs such as 0.2, 0.4, 1 and 3% w/v was used at a fixed ratio of ZnO NPs:SDS:dispersing agent. The highest dispersion stability was achieved at 1% w/v content of modified ZnO NP, whereas some precipitate was observed at 3% w/v. The result reveals that sonication at 30 minutes produced the highest dispersion stability whereas extended sonication led to re-agglomeration of ZnO NPs. The optimum ratio of ZnO NPs:SDS:dispersing agent which produced about 98% dispersion stability was at 1:0.25:0.2. The zeta potential (ZP) values of ZnO NPs/GPTMS, ZnO NPs/PVA, and ZnO NPs/OA dispersions are -51, -29 and -15 mV, respectively. The ZP values was influenced by the electrical charge surrounding the particles which was also caused by the functional group of the dispersing agents. However, the stabilization mechanisms of modified ZnO NPs in water was complicated. It did not only depend on the electrostatic value but also on electrosteric stabilization caused by the steric effects hindering the dispersing agents. Interactions between the dispersing agents and ZnO NPs was confirmed through FTIR analysis.

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24

Piacenza, Elena, Alessandro Presentato, Marta Bardelli, Silvia Lampis, Giovanni Vallini, and Raymond J. Turner. "Influence of Bacterial Physiology on Processing of Selenite, Biogenesis of Nanomaterials and Their Thermodynamic Stability." Molecules 24, no. 14 (July 11, 2019): 2532. http://dx.doi.org/10.3390/molecules24142532.

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We explored how Ochrobactrum sp. MPV1 can convert up to 2.5 mM selenite within 120 h, surviving the challenge posed by high oxyanion concentrations. The data show that thiol-based biotic chemical reaction(s) occur upon bacterial exposure to low selenite concentrations, whereas enzymatic systems account for oxyanion removal when 2 mM oxyanion is exceeded. The selenite bioprocessing produces selenium nanomaterials, whose size and morphology depend on the bacterial physiology. Selenium nanoparticles were always produced by MPV1 cells, featuring an average diameter ranging between 90 and 140 nm, which we conclude constitutes the thermodynamic stability range for these nanostructures. Alternatively, selenium nanorods were observed for bacterial cells exposed to high selenite concentration or under controlled metabolism. Biogenic nanomaterials were enclosed by an organic material in part composed of amphiphilic biomolecules, which could form nanosized structures independently. Bacterial physiology influences the surface charge characterizing the organic material, suggesting its diverse biomolecular composition and its involvement in the tuning of the nanomaterial morphology. Finally, the organic material is in thermodynamic equilibrium with nanomaterials and responsible for their electrosteric stabilization, as changes in the temperature slightly influence the stability of biogenic compared to chemogenic nanomaterials.

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25

Save, Maud, Maggy Manguian, Christophe Chassenieux, and Bernadette Charleux. "Synthesis by RAFT of Amphiphilic Block and Comblike Cationic Copolymers and Their Use in Emulsion Polymerization for the Electrosteric Stabilization of Latexes." Macromolecules 38, no. 2 (January 2005): 280–89. http://dx.doi.org/10.1021/ma048487+.

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26

Alsudir, Samar, and Edward P. C. Lai. "Electrosteric stabilization of colloidal TiO2 nanoparticles with DNA and polyethylene glycol for selective enhancement of UV detection sensitivity in capillary electrophoresis analysis." Analytical and Bioanalytical Chemistry 409, no. 7 (December 15, 2016): 1857–68. http://dx.doi.org/10.1007/s00216-016-0130-8.

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27

Moskalewicz, Tomasz, Maciej Warcaba, Sławomir Zimowski, and Alicja Łukaszczyk. "Improvement of the Ti-6Al-4V Alloy’s Tribological Properties and Electrochemical Corrosion Resistance by Nanocomposite TiN/PEEK708 Coatings." Metallurgical and Materials Transactions A 50, no. 12 (October 10, 2019): 5914–24. http://dx.doi.org/10.1007/s11661-019-05484-7.

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Abstract In this work, polyetheretherketone-based TiN/PEEK708 nanocomposite coatings on oxygen hardened Ti-6Al-4V titanium alloy substrates were fabricated by using cathodic electrophoretic deposition and post-heat treatment. The microstructure of coatings was investigated by using scanning electron microscopy, transmission electron microscopy, and X-ray diffractometry. The scratch resistance, tribological properties, and electrochemical corrosion resistance were also studied. The results show that homogeneous TiN/PEEK708 coatings may be deposited from ethanol-based suspensions containing cationic chitosan polyelectrolyte, which provides electrosteric stabilization of the suspension. Heat treatment densified the coatings and changed the PEEK structure from amorphous to semi-crystalline. The coatings were characterized by very good scratch resistance, with no cohesive and adhesive cracks being observed up to the load of 30 N. They reduced the coefficient of friction from 0.70 for the baseline alloy and 0.65 for the oxygen hardened alloy to 0.30. They also significantly increased the wear resistance of the alloy during dry sliding contact with an alumina ball. The wear rate of the coated oxygen hardened alloy was about 70 and 650 times lower in comparison with the oxygen hardened and baseline alloy, respectively. The corrosion studies demonstrated that the baseline and oxygen hardened alloy have comparable corrosion resistance. The TiN/PEEK708 coating enhanced the electrochemical corrosion resistance of the alloy in the NaCl aqueous solution.

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28

Kumar, Sangeetha Ashok, Jaya Seeli Shankar, Siddan Gouthaman, and Bhuvana K. Periyasamy. "Effect of Electrosteric Stabilization of TiO2 Nanoparticles on Photophysical Properties of Organic/Inorganic Hybrid Nanocomposite." Materials Today Communications, February 2023, 105533. http://dx.doi.org/10.1016/j.mtcomm.2023.105533.

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29

Infante-Rivera, Jose, Victoria Campos, C. A. Guerrero-Salazar, Ubaldo Ortiz-Méndez, A. Olivas, and Selene Sepúlveda-Guzmán. "Colloidal dispersion of metal nanoparticles electrosterically stabilized with Carrageenan type κ and its application as hydrogel." MRS Proceedings 1453 (2013). http://dx.doi.org/10.1557/opl.2013.1130.

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ABSTRACTIn this work Carrageenan type κ was used as electrosteric stabilizer in order to prepare a biocompatible colloidal dispersion of novel metal nanoparticles. Gold and silver nanoparticles were synthesized by reducing the metal precursor using sodium borohydride in presence of Carrageenan type κ. The growth mechanism of metal nanoparticles and stabilization behavior by Carrageenan type κ was analyzed by UV-Vis spectroscopy and transmission electron microscopy. The morphology and particle size distribution were also studied as a function of reaction parameters and the particle size was dependent of the pH of the reaction media. The Ag nanoparticles with sphere-like morphology and average size of 10 nm were obtained. The morphology of Au nanoparticles was strongly affected by the pH value resulting in particles with snake-like morphology at alkaline conditions. The UV-Vis spectra showed that Ag nanoparticles were highly stable at alkaline conditions and for long period of time. Au nanoparticles dispersion showed a better stability for long period of time at acidic conditions. The nanoparticles dispersion electrosterically stabilized were used to prepare hydrogels by poured into a plastic mold and frozen with liquid nitrogen and then lyophilized. The morphology and thermal stability of resulting composites were analyzed by using scanning electronic microscopy and differential scanning calorimetry respectively. The degradation temperature of Carrageenan type κ was increased due to the presence of metal nanoparticles.

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Journal articles on the topic 'Electrosteric stabilization'

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