Relevant bibliographies by topics / Colloidal silica

Academic literature on the topic 'Colloidal silica'

Author: Grafiati

Published: 4 June 2021

Last updated: 10 March 2023

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Journal articles on the topic "Colloidal silica"

BAHADUR, J., D. SEN, S. MAZUMDER, BHASKAR PAUL, and ARSHAD KHAN. "EVAPORATION DRIVEN SELF ASSEMBLY OF NANOPARTICLES DURING SPRAY DRYING: VOLUME FRACTION DEPENDENT PACKING." International Journal of Nanoscience 10, no. 04n05 (August 2011): 995–99. http://dx.doi.org/10.1142/s0219581x11008484.

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Hierarchically structured micrometric mesoporous silica spheres have been synthesized by evaporation driven self assembly of silica colloids under slow drying condition. The inter particle correlation inside grains has been investigated by small-angle neutron scattering. In a slow drying regime, droplets shrink isotropically leading to spherical dried grains. However, the packing of nanoparticles depends on the initial colloidal concentration. The packing of the nanoparticles for low colloidal concentration is uniform throughout the grain but at higher concentration of the colloids, dried grains possess nonuniform radial packing of the nano-particles. The average packing fraction of the nanoparticles decreases with increasing colloidal concentration due to modification in viscosity of the colloidal dispersion prior to drying.

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Williamson, B. J., J. J. Wilkinson, P. F. Luckham, and C. J. Stanley. "Formation of coagulated colloidal silica in high-temperature mineralizing fluids." Mineralogical Magazine 66, no. 4 (August 2002): 547–53. http://dx.doi.org/10.1180/0026461026640048.

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AbstractRecent experimental studies have suggested that colloidal silica can form in high-T (300 to >700°C) hydrothermal fluids (Wilkinson et al., 1996). Natural evidence in support of this was found by Williamson et al. (1997) who proposed a colloidal (gel) silica origin for <50 μm irregularly-shaped inclusions of quartz contained in greisen topaz from southwest England. Confocal and microprobe studies, presented here, strengthen this argument although rather than forming a gel in the hydrothermal fluid, it is suggested that the colloidal silica aggregated as a viscous coagulated colloid, with much of its volume (<10 to 30 vol.%) consisting of metal (mainly Fe) -rich particles. This is evident from the largely solid nature of metal-rich shrinkage bubbles contained at the margins of the inclusions of quartz which shows that the material forming the inclusions contained much less liquid than would be expected in a silica gel. These findings may have important implications for models of ore formation since the precipitation of a coagulated colloid could inhibit hydrothermal fluid transport and cause co-deposition of silica and entrained ore-forming elements. The mode of formation of the colloidal silica and further implications of the study are discussed.

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Bergstein, T. G., L. C. Bicudo, L. Rodello, R. R. Weiss, and S. D. Bicudo. "Kinematic and spermatic recovery after selection by centrifugation in colloid solutions of ovine cryopreserved semen." Arquivo Brasileiro de Medicina Veterinária e Zootecnia 68, no. 6 (December 2016): 1539–47. http://dx.doi.org/10.1590/1678-4162-8912.

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ABSTRACT Frozen and thawed ovine semen undergo morphological and functional changes that prevent or decrease the efficiency of fertilization. Sperm selection methods seek to improve the quality and viability of the fertilizing materials. Four sperm selection methods were employed, using two silica colloidal solutions coated with silane (silica colloidal-silane) or by polyvinylpyrrolidone (silica colloidal-PVP), and varying the volume of colloidal solution. Sperm kinematic and sperm recovery were evaluated by means of CASA. The protocols using silica colloidal-silane showed higher total motility (TM), progressive motility (PM) and percentage of rapid sperm (%RAP) compared to the methods employing silica colloidal-PVP and to the samples prior to sperm selection. The silica colloidal-PVP had greater sperm recovery compared to the silica colloidal-silane. Only the method using 4mL of silica colloidal-PVP was not efficient in selecting samples with better quality compared to the samples analyzed prior to sperm selection. The methods using lower volumes of colloidal solution did not differ from those using higher volumes and the best results were shown by the method with 1mL silica colloidal-silane. The results found in the study indicated greater efficiency of the silica colloidal-silane solution for sperm selection of thawed ovine semen when compared to selection using silica colloidal-PVP. The method using 1mL of silica colloidal-silane was equally efficient to the method with higher volume, presenting itself as an alternative to process samples with lower sperm concentration.

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Chuang, S. H., T. C. Chang, C. F. Ouyang, and J. M. Leu. "Colloidal silica removal in coagulation processes for wastewater reuse in a high-tech industrial park." Water Science and Technology 55, no. 1-2 (January 1, 2007): 187–95. http://dx.doi.org/10.2166/wst.2007.054.

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Four experiments of coagulation and flocculation were conducted to investigate the characteristics of colloidal silica removal in a high-tech industrial wastewater treatment plant for reclamation and reuse of the effluent. Experimental results illustrated that poly-aluminium chloride (PACl) showed higher performances on colloidal silica removal than alum. Interestingly, the two coagulants demonstrated the same capacity on silica removal. The specific silica removal capacity was approximately 0.135 mg SiO2/mg Al2O3 when the dosage of coagulants was in the range 30–150 mg/L Al2O3. In addition, the silica was reduced significantly at the condition of pH above 8. Experimental data implied that precipitation of aluminium flocs was the major mechanism for colloid silica removal in PACl and alum coagulation, besides, charge adsorption was also important for improving removal efficiency. Moreover, the addition of polyacrylic acid (PAA) as a flocculant could slightly advance silica removal in the PACl coagulation. The combined PACl/PAA/flocs coagulation was effective for the removal of colloidal silica, soluble COD, and turbidity and also suitable as a pretreatment unit in wastewater reclamation and reuse processes.

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Jin, Weifeng, Ying Tao, and Rongzhong Cheng. "Coupled Effect of Carbon Nanotubes and Crushing on Shear Strength and Compression of Calcareous Sand Seeped by Colloidal Silica." Geofluids 2022 (August 12, 2022): 1–17. http://dx.doi.org/10.1155/2022/9335126.

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Colloidal silica, which has a low viscosity, can seep quickly through sand and subsequently form silica gel to stabilize the sand. The addition of carbon nanotubes can improve the strength of the sand-gel composite. However, previous literature has not investigated the coupled effect of carbon nanotubes and sand crushing on the strength and compression of colloidal-silica-stabilized calcareous sand. So we prepared 86 specimens with 2 different concentrations of colloidal silica and 9 different contents of carbon nanotubes. Then, we performed triaxial shearing and isotropic compression tests based on the triaxial system. The test results show the following: (1) The same carbon nanotube content at the higher concentration of colloidal silica results in higher shear strength, but increasing crushing makes the shear strengths, respectively, caused by 10 wt% and 40 wt% colloidal silica dispersed with carbon nanotubes tend to be the same. (2) The optimal content of carbon nanotubes, which leads to the maximum shear strength, is distributed differently in different concentrations of colloidal silica; i.e., as crushing increases, the optimal carbon nanotube content drifts from 0.03 wt% to 0.10 wt% in 10 wt% colloidal silica, while 40 wt% colloidal silica stabilizes the optimal carbon nanotube content around 0.08 wt%. (3) Compared with carbon nanotubes in 10 wt % colloidal silica, carbon nanotubes in 40 wt% colloidal silica cause higher cohesion rather than internal friction angle, which is the mechanism of higher shear strength at higher colloidal silica concentration with the same carbon nanotube content. (4) For isotropic compression, minimal compression is caused by 40 wt% colloidal silica plus 0.1 wt% carbon nanotubes.

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Jin, Weifeng, Ying Tao, Xin Wang, and Zheng Gao. "The Effect of Carbon Nanotubes on the Strength of Sand Seeped by Colloidal Silica in Triaxial Testing." Materials 14, no. 20 (October 15, 2021): 6119. http://dx.doi.org/10.3390/ma14206119.

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Colloidal silica can quickly seep through sand and then form silica gels to cement sand particles. To improve the strength of sand seeped by colloidal silica, carbon nanotubes were dispersed in the colloidal silica to form carbon-nanotube-reinforced sand-gel composites. Then triaxial tests were performed to explore how carbon nanotube content affects shear strength. The test results showed that: (1) with the increase of colloidal silica concentration, the shear strength significantly increased with the same carbon nanotube content (especially the low concentration of 10 wt. % colloidal silica, which showed almost no reinforcing effect with carbon nanotubes) while 40 wt. % colloidal silica plus 0.01 wt. % carbon nanotube caused the maximum increase of shear strength by up to 93.65%; (2) there was a concentration threshold of colloidal silica, above which the shear strength first increased to the peak value and then decreased with increasing carbon nanotube content (and we also established a formula to predict such phenomenon); and (3) SEM images showed that carbon nanotubes were connected as several ropes in the micro-cracks of the silica gel, resulting in greater macroscopic shear strength. Our new method of mixing carbon nanotubes and colloidal silica to seep through sand can contribute to sandy ground improvement.

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Gu, Shuang Na, Ying Shi, Liang Yong Wang, Wei Li Liu, and Zhi Tang Song. "Modification of Colloidal Silica with Sodium Aluminate." Applied Mechanics and Materials 468 (November 2013): 39–42. http://dx.doi.org/10.4028/www.scientific.net/amm.468.39.

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Colloidal silica modified by sodium aluminate was examined. The particle size of Al-modified colloidal silica was slightly increased with increase of the sodium aluminate concentration, but colloidal silica may aggregate or gel under high concentration. Zeta potential was more negative and thermal stability was significantly improved through modification. The Al-modified colloidal silica was highly stable at pH 3-6.

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Kim, Do Hyun, Hyung Mi Lim, Sang Mok Kim, Byoung Man Kim, Dae Sung Kim, and Seung Ho Lee. "Effect of Colloidal Silica Contents in the Organic-Inorganic Hybrid Coatings on the Physical Properties of the Film on the Metal Surface." Solid State Phenomena 124-126 (June 2007): 655–58. http://dx.doi.org/10.4028/www.scientific.net/ssp.124-126.655.

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The coatings composed of colloidal silica, methyltrimethoxy silane (MTMS), water, and acid catalysts have been prepared with variation of colloidal silica contents from 0 to 20 %. All the coatings were prepared and coated on the aluminum plate under the same condition except the contents of colloidal silica, and the compensating contents of MTMS and water with fixed molar ratio of MTMS and water to be 3. The physical properties were compared in terms of hardness, adhesion strength, corrosion, wear resistance, and thermo gravimetry analysis, etc. The pencil hardness was drastically increased with the addition of 5% colloidal silica particles and was further increased slightly by increase of additional silica. The corrosion resistance of the coating film against alkali solution was improved by increasing colloidal silica content, however, the acid resistance was less affected by the content of colloidal silica.

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Solihin, Eso, Anni Yuniarti, Apong Sandrawati, and Zaenal Mutaqin. "APLIKASI PUPUK SI ORGANIK DENGAN PUPUK N,P,K DALAM MENINGKATKAN P DAN SI TANAH PADA INCEPTISOL JATINANAGOR TERHADAP RESPON TANAMAN HANJELI (Coix lacryma Jobi L.)." Agric 30, no. 1 (July 31, 2018): 51–56. http://dx.doi.org/10.24246/agric.2018.v30.i1.p51-56.

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The objective of this research was to determine the effect of combinations of N, P, K and organic silica fertilizers In Soil P and Si and growth Of Job’s Tears (Coix Lacryma Jobi L.). This research began on May 2017 to October 2017. This research has been done in experimental of Faculty Agricultural, Padjadjaran University Jatinangor. The experiment was in Randomized Block Design (RCBD) consisting of ten treatments with three replications; (A) Control, (B) NPK standard, (C) NPK + ¼ Silica Emulsion, (D) NPK + ½ Silica Emulsion, (E) NPK + ¾ Silica Emulsion, (F) NPK + 1 Emulsion of Ash Silica , (G) NPK + ¼ Nano Colloidal Silica, (H) NPK + ½ Nano Colloidal Silica, (I) NPK + ¾ Nano Colloidal Silica, (J) NPK + 1 Nano Colloidal Silica. The results showed that there was effect of Si fertilizer on soil P and plant growth. Treatment (J) NPK + 1 Colloidal Nano Silica gives Hanjeli the highest yield 5 MST, 7 MST, 9 MST and 11 MST with plant height 3.58 cm, 10.58 cm, 17.17 cm and 18.00 cm

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Yan, Qing Song, Xu Xiong, Gang Lu, Hong Wan, Can Cheng Liu, Fang Wang, and Xun Zou. "Comparison of Dimensional Accuracy for Different Investment Casting Shells and Binders Based on Selective Laser Sintering." Applied Mechanics and Materials 120 (October 2011): 243–47. http://dx.doi.org/10.4028/www.scientific.net/amm.120.243.

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The dimensional accuracy of shells and binders of investment casting which incorporation with selective laser sintering is investigated. The results show that the dimensional accuracy of colloidal silica is higher than that of ethyl silicate, and the dimensional variation rate of investment casting shells produced with colloidal silica is much lower than ethyl silicate shells. Moreover, colloidal silica possesses better performance on environmental protection and production cost control. These indicate that the comprehensive properties of colloidal silica are better than that of ethyl silicate. Meanwhile, the average dimensional variation rate of the single colloidal silica shell and the ethyl silicate-colloidal silica alteration shell was almost identical and it was much lower than that of the other shells which were produced in this study. This means two kinds of shells are optimized in all five types of shells studied in the aspect of dimensional accuracy. The unique properties of two shells show clearly direction to choose the type of shell.

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Dissertations / Theses on the topic "Colloidal silica"

Gill, Michael. "Polyaniline-silica colloidal nanocomposites." Thesis, University of Sussex, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239632.

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The work presented in this thesis provides a new route to a colloidal form of polyaniline, which uses colloidal silica as a dispersant. We obtained stable colloidal dispersions of polyaniline-silica composite particles with a 'raspberry' morphology. Compressed pellets of these particles exhibit solid-state conductivities of 1O-!_10-2 S crrr l, which is approximately 1-2 orders of magnitude lower than that of polyaniline bulk powder. This novel colloidal form of polyaniline has significantly improved processability compared to conventionally synthesised polyaniline. The synthesis and chemical characterisations are presented for various polyaniline-silica colloidal nanocomposites. The quantity of polyaniline incorporated into the nanocomposite particles can be controlled by varying the diameter of the silica dispersant, approximately 20% and 60 % polyaniline content being obtained using 120 nm and 10 nm diameter silica respectively. The average particle size ranges of nanocomposites was found to be 150 to 700 nm and 330 to 560 nm, as determined by transmission electron microscopy (TEM) and disc centrifuge photosedimentometry (DCP) respectively. The nanomorphology and surface composition of the polyanilinesilica particles were determined by small angle X-ray scattering (SAXS) and X-ray photoelectron spectroscopy (XPS) respectively. The average inter-particle separation distance of the silica particles within the polyaniline-silica raspberries was determined by SAXS to be 4 nm, a dimension equivalent to molecular polyaniline. The XPS data suggests that the surface of the particles is silica rich, this is consistant with their long term colloidal stability in 1.2 mole dm-3 HCl. The kinetics of polymerisation was studied using 1H NMR spectroscopy to monitor the disappearance of aniline monomer. Polymerisation rates during the synthesis of polyaniline-silica nanocomposites were appreciably faster than the corresponding precipitation polymerisations carried out in the absence of silica dispersants, due primarily to an increase in the second auto-catalytic step of the reaction. Rate constants were determined for both these types of synthesis; the values obtained for the precipitation polymerisations were in reasonably good agreement with literature values.

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Corradi, Roberto. "Conducting polymer-silica colloidal composites." Thesis, University of Sussex, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263866.

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Ramli, Nor Hanuni. "Ultrafiltration of polydisperse colloidal silica." Thesis, Swansea University, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.678552.

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Yuan, Zheng. "Impact of Colloidal Silica on Silicone Oil-Silica Mixed Antifoams." University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1491562587653182.

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Spencer, Laura Marie. "Evaluation of sand treated with colloidal silica gel." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/37131.

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Liquefiable soils are common at ports due to the use of hydraulic fills for construction of waterfront facilities. Liquefaction-induced ground failure can result in permanent ground deformations that can cause loss of foundation support and structural damage. This can lead to substantial repair and/or replacement costs and business interruption losses that can have an adverse effect on the port and the surrounding community. Although numerous soil improvement methods exist for remediating a liquefaction-prone site, many of these methods are poorly suited for developed sites because they could damage existing infrastructure and disrupt port operations. An alternative is to use a passive remediation technique. Treating liquefiable soils with colloidal silica gel via permeation grouting has been shown to resist cyclic deformations and is a candidate to be used as a soil stabilizer in passive mitigation. The small-strain dynamic properties are essential to determine the response to seismic loading. The small-to-intermediate strain shear modulus and damping ratio of loose sand treated with colloidal silica gel was investigated and the influence of colloidal silica concentration was determined. The effect of introducing colloidal silica gel into the pore space in the initial phase of treatment results in a 10% to 12% increase in the small-strain shear modulus, depending on colloidal silica concentration. The modulus reduction curve indicates that treatment does not affect the linear threshold shear strain, however the treated samples reduce at a greater rate than the untreated samples in the intermediate-strain range above 0.01% cyclic shear strain. It was observed that the treated sand has slightly higher damping ratio in the small-strain range; however, at cyclic shear strains around 0.003% the trend reverses and the untreated sand begins to have higher damping ratio. Due to the nature of the colloidal silica gelation process, chemical bonds continue to form with time, thus the effect of aging on the dynamic properties is important. A parametric study was performed to investigate the influence of gel time on the increase in small-strain shear modulus. The effect of aging increases the small-strain shear modulus after gelling by 200 to 300% for the 40-minute-gel time samples with a distance from gelation (time after gelation normalized by gel time) of 1000 to 2000; 700% for the 2-hour-gel time sample with a distance from gelation of 1000; and 200 to 400% for the 20-hour-gel time samples with a distance from gelation of 40 to 100. The treatment of all potentially liquefiable soil at port facilities with colloidal silica would be cost prohibitive. Identifying treatment zones that would reduce the lateral pressure and resulting pile bending moments and displacements caused by liquefaction-induced lateral spreading to prevent foundation damage is an economic alternative. Colloidal silica gel treatment zones of varying size and location were evaluated by subjecting a 3-by-3 pile group in gently sloping liquefiable ground to 1-g shaking table tests. The results are compared to an untreated sample. The use of a colloidal silica treatment zone upslope of the pile group results in reduced maximum bending moments and pile displacements in the downslope row of piles when compared to an untreated sample; the presence of the treatment zone had minimal effect on the other rows of piles within the group.

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Weisen, Albree Rae. "Thermorheological Dynamics of Glycerol-Based Colloidal Silica Suspensions." University of Akron / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=akron1626785313712582.

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Sinclair, Luke Alexander. "Development of a silica scaling test rig." Thesis, University of Canterbury. Mechanical Engineering, 2012. http://hdl.handle.net/10092/7002.

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One of the most significant problems faced in the geothermal power industry is that of scaling due to amorphous silica. The silica can deposit out of super-saturated brine in monomeric form and as colloidal particles. Deposition can occur at problematic rates on pipe surfaces and in the rocks of the re-injection wells. Currently there are a number of methods for controlling deposition but the fundamental mechanisms that govern the transport and attachment of silica are not well understood. Many field experiments on silica scaling have been conducted but, due to differences in brine chemistry and operational conditions, the results are hard to compare. Many laboratory experiments have also been performed but these are difficult to correlate with the field experiments. Previous research has found that hydrodynamics are important for the deposition of colloidal particles and inertial impaction was proposed to be the dominant transport mechanism. These results were analysed and, in contradiction, the dominant transport mechanism of the particles was theoretically expected to be that of diffusion. A series of experiments were planned that could test the effect of hydrodynamics on colloidal silica deposition in cylindrical pipe flow. Three parameters were to be varied in the experiment: particle size (10nm and 100nm), Reynolds number (750 - 23,600) and viscous boundary layer thickness (0.06 - 0.38mm). To perform this experimentation, a Silica Scaling Test Rig was designed, built and commissioned. A method for producing synthetic brine was developed which can provide sols that are stable for at least one month and have a particle size of 10-20nm. Silica deposition has successfully been obtained in three preliminary experiments using the rig. Without the exclusion of air from the rig significant corrosion occurs in the mild steel test piece. Protrusions that were likely to be silica deposits were found to be co-located with the corrosion, suggesting that one process promotes the other. Neither deposition nor corrosion was found on the pipe’s weld seam and heat affected zone. Corrosion was prevented using an oxygen exclusion system and two amorphous silica deposition structures were observed: a flat plate-like structure and a globular structure that consisted of 1-5μm diameter globules that built up on each other. Other field and laboratory experiments have produced globular structures similar to those found in this research. To perform the planned experimentation, future work is required: the silica deposition rate must be increased, colloidal silica sol stability must be improved, and some modifications must be made to the rig.

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Le, Thai Van. "Silica colloidal crystals as new materials for biomolecule separations." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 117 p, 2007. http://proquest.umi.com/pqdlink?did=1251902811&Fmt=7&clientId=79356&RQT=309&VName=PQD.

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Lesaine, Arnaud. "Structural and mechanical properties of dried colloidal silica layers." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS597/document.

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Le séchage d’une suspension colloïdale produit une couche solide plus ou moins poreuse. Ce processus intervient dans de nombreuses applications, telles que le procédé sol-gel ou la fabrication de laques et de peintures. Durant le séchage, l’évaporation du solvant entraîne la rétraction du matériau ; des contraintes importantes peuvent alors apparaître dans les couches colloïdales, les rendant susceptibles de se fracturer. Il est ainsi crucial de comprendre l’influence de paramètres de contrôle tels que la vitesse de séchage, l’épaisseur de la couche ou la taille de particule sur les propriétés mécaniques et de structure du matériau final. Dans cette thèse, nous avons utilisé des suspensions de Ludox (silice colloïdale) comme système modèle afin d’étudier l’effet de la vitesse de séchage sur les propriétés du matériau solide obtenu. Dans une première partie, nous avons mis en œuvre des mesures de porosité, ainsi que de microscopie à force atomique et de diffraction de rayons X, afin de caractériser l’effet de la vitesse de séchage sur les propriétés de structure des couches sèches. Nous avons mis en évidence l’importance de la polydispersité des suspensions initiales, ainsi que des phénomènes d’agrégation de particules, sur la structure et la compacité du matériau obtenu. Dans une deuxième partie, des mesures de constantes élastiques par propagation d’ultrasons nous ont permis de déterminer l’élasticité tensorielle (i.e. le module de compressibilité et celui de cisaillement) des couches colloïdales. Ces modules élastiques dépendent de la porosité du matériau ainsi que de la taille des particules de silice. Les données expérimentales ont été comparées aux prédictions de deux schémas d’homogénéisation (Mori-Tanaka et auto-cohérent), ainsi qu’au modèle de Kendall pour le module d’Young, qui prend en considération une énergie d’adhésion entre les particules. Enfin, nous avons déterminé la résistance à la fracture des couches colloïdales à l’aide de tests d’indentation Vickers. Cette résistance à la fracture, mesurée à la fin du séchage, est mise en relation avec la vitesse d’évaporation, la porosité du matériau, ainsi que la densité de fractures observées pendant le processus d’évaporation du solvant
Drying a colloidal suspension results in the formation of a more or less porous solid layer. This procedure is central to many applications such as sol-gel processes, the design of paints and lacquers... As the solvent evaporation induces shrinkage of the material, large stresses can develop in these layers, making them prone to fracture. A crucial challenge is thus to understand the role of the control parameters, such as drying rate, film thickness and particle size, on the structural and mechanical properties of the final layer. In this thesis work, Ludox (colloidal silica) was used as a model system to study the effect of the drying rate on the structural and mechanical properties of the resultant solid. The effect of the drying rate on the structural properties of the dry layers was studied using porosity measurements as well as atomic force microscopy and small-angle X-ray scattering. We could evidence the importance of initial suspension dispersity and particle aggregation on the structure of the dry layers. Using ultrasound measurements, we determined the tensorial elasticity (bulk and shear moduli) of the dry layers. The elastic moduli can be related to the material porosity and the particle size. Thus, the experimental data was used to test several homogeneization schemes (Mori-Tanaka and self-consistent) as well as Kendall's model for the Young’s modulus, which considers the effect of adhesive forces between particles. Finally, hardness and fracture toughness of the materials were inferred from Vickers indentation tests. The fracture properties of the layers in their dry, final state were related to their packing fraction, the evaporation rate, and the density of the cracks formed during the desiccation process

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Hamderi, Murat Gallagher Patricia M. "Pilot-scale modeling of colloidal silica delivery to liquefiable sands /." Philadelphia, Pa. : Drexel University, 2010. http://hdl.handle.net/1860/3285.

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Books on the topic "Colloidal silica"

1924-, Bergna Horacio E., and Roberts William O. 1936-, eds. Colloidal silica: Fundamentals and applications. Boca Raton, FL: Taylor and Francis, 2005.

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Walldal, Charlotte. Interactions between colloidal silica and polymers. Göteborg, Sweden: Göteborg University, Faculty of Science, 2000.

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Bergna, Horacio E., ed. The Colloid Chemistry of Silica. Washington DC: American Chemical Society, 1994. http://dx.doi.org/10.1021/ba-1994-0234.

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1924-, Bergna Horacio E., American Chemical Society. Division of Colloid and Surface Chemistry., American Chemical Society Meeting, and Ralph K. Iler Memorial Symposium (1990 : Washington, D.C.), eds. The Colloid chemistry of silica: Developed from a symposium sponsored by the Division of Colloid and Surface Chemistry, at the 200th National Meeting of the American Chemical Society, Washington, DC, August 26-31, 1990. Washington, DC: American Chemical Society, 1994.

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Hench, L. L. Sol-gel silica: Properties, processing, and technology transfer. Westwood, N.J., U.S.A: Noyes Publications, 1998.

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Royal Society of Chemistry (Great Britain), ed. Silica-based materials for advanced chemical applications. Cambridge: RSC Pub., 2009.

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Bouzid, Menaa, ed. Bioencapsulation in silica-based nanoporous sol-gel glasses. Hauppauge, N.Y: Nova Science Publishers, 2009.

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A, Brandreth Dale, ed. Small particles technology. New York: Plenum Press, 1998.

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Roberts, William O., and Horacio E. Bergna. Colloidal Silica. Taylor & Francis Group, 2020.

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(Editor), Horacio E. Bergna, and William O. Roberts (Editor), eds. Colloidal Silica: Fundamentals and Applications (Surfactant Science). CRC, 2005.

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Book chapters on the topic "Colloidal silica"

Cannell, David S., and Claude Aubert. "Aggregation of Colloidal Silica." In On Growth and Form, 187–97. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-5165-5_12.

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Velazquez, M., and S. C. Danforth. "Pressure Filtration of Monosized Colloidal Silica." In Surface and Colloid Science in Computer Technology, 87–105. Boston, MA: Springer US, 1987. http://dx.doi.org/10.1007/978-1-4613-1905-4_5.

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Sunkara, Hari Babu, Jagdish M. Jethmalani, and Warren T. Ford. "Solidification of Colloidal Crystals of Silica." In ACS Symposium Series, 181–91. Washington, DC: American Chemical Society, 1995. http://dx.doi.org/10.1021/bk-1995-0585.ch014.

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Pontoni, D., T. Narayanan, and A. R. Rennie. "Nucleation and growth kinetics of colloidal silica." In Trends in Colloid and Interface Science XVI, 227–30. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/b11860.

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Bogush, G. H., and C. F. Zukoski. "The Colloidal Chemistry of Growing Silica Spheres." In Ceramic Microstructures ’86, 475–83. Boston, MA: Springer US, 1987. http://dx.doi.org/10.1007/978-1-4613-1933-7_49.

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Khabibullin, Amir, and Ilya Zharov. "Responsive Nanoporous Silica Colloidal Films and Membranes." In Intelligent Stimuli-Responsive Materials, 265–91. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118680469.ch8.

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Giesche, Herbert. "Medical andTechnological Application of Monodispersed Colloidal Silica Particles." In Medical Applications of Colloids, 174–304. New York, NY: Springer New York, 2008. http://dx.doi.org/10.1007/978-0-387-76921-9_5.

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Payne, Charles C. "Applications of Colloidal Silica: Past, Present, and Future." In Advances in Chemistry, 581–94. Washington DC: American Chemical Society, 1994. http://dx.doi.org/10.1021/ba-1994-0234.ch029.

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Krishnan, Jiji, and Shruti Shukla. "Mechanical Behaviour of Sand Treated with Colloidal Silica." In Lecture Notes in Civil Engineering, 467–79. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-6086-6_38.

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Conference papers on the topic "Colloidal silica"

Weck, Johann M., Lea M. Wassermann, and Amelie Heuer-Jungemann. "DNA origami and DNA origami silica hybrids for biomedical applications." In Colloidal Nanoparticles for Biomedical Applications XVI, edited by Marek Osiński and Antonios G. Kanaras. SPIE, 2021. http://dx.doi.org/10.1117/12.2578358.

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FALAMAKI, C. "MICROWAVE HYDROTHERMAL PARTICLE GROWTH OF COLLOIDAL SILICA." In Proceedings of the International Symposium on Solid State Chemistry in China. WORLD SCIENTIFIC, 2002. http://dx.doi.org/10.1142/9789812776846_0070.

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Jiménez-Villar, Ernesto, Anderson A. V. Gomes, Niklaus U. Wetter, Jessica Dipold, Valdeci Mestre, and Christian T. Dominguez. "Random laser in ordered colloidal suspensions." In Latin America Optics and Photonics Conference. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/laop.2022.w1b.2.

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Random lasing is achieved in an ordered photonic colloidal (TiO2@Silica) suspension. Stronger correlation in the scatterers’ (TiO2@Silica) position, induced by stronger and longer-range Coulomb interaction improves light localization and random laser performance.

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MacChesney, John B. "Optical fiber fabrication from formed bodies of colloidal silica." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1989. http://dx.doi.org/10.1364/oam.1989.fq1.

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Fibers made by the now standard vapor deposition processes have achieved performance levels limited only by the intrinsic properties of the fused silica which comprise them. Yet there is active exploration of other means of preparing optical waveguides. These are directed toward achieving ultimate economy while maintaining adequate performance. The strategy is to form silica into a waveguide configuration at low temperatures starting with submicroscopic silica particles (10-100 nm). The porous silica body once formed is then vitrified by viscous sintering like the soot formed by OVD or MCVD.

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Amme, M., H. Lang, and M. Sto¨ckl. "Different Pathways of Secondary Phase Formation Induced by Colloidal and Dissolved Silica During the Dissolution of UO2 Nuclear Fuel in Leaching Tests." In ASME 2003 9th International Conference on Radioactive Waste Management and Environmental Remediation. ASMEDC, 2003. http://dx.doi.org/10.1115/icem2003-4504.

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We investigated the different dissolution behaviour of UO2 nuclear fuel material in waters containing silica in two different physical and chemical forms (dissolved ions and as SiO2 colloids, respectively) at elevated temperatures (95 °C in autoclaves). It was investigated if SiO2 colloids can act as carrier material for U ions during a interface geochemical dissolution process, a process that might possibly enhance the mobilization of uranium. Herefore, leaching / dissolution tests were conducted in batch reactors, using both dissolved Si (sodium metasilicate solution), as well as synthetic SiO2 colloids (100 nm diameter). Solid materials were examined with scanning electron microscopy (SEM-EDX) after the tests and ICP-OES was used for analysis of concentrations of U and Si in solutions. Thermodynamic calculations were applied for modelling the surface charges of the solid materials. Results show that a treatment with colloidal SiO2 has different effects on the surfaces than a leaching in dissolved silicate solutions. In the presence of colloids, well-crystallized secondary phases containing U and Si (most obviously uranyl silicates) were found on the surfaces, which were attacked by the treatment. This was not the case when dissolved Si was used. SiO2 colloids were partly found to remain on the surfaces after 1000 h at 95 °C. Dissolved U concentrations decreased with increasing Si content in the systems, especially so when colloidal Si was used. Ultrafiltration showed that the greatest part of the dissolved U was associated with Si colloids. A surface charge model suggests that the different effects are due to the development of electrostatic interactions between the UO2 and SiO2 surfaces.

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Fujiwara, Eric, Matheus K. Gomes, Marco C. P. Soares, Matheus S. Rodrigues, Egont A. Schenkel, and Carlos K. Suzuki. "Characterization of Colloidal Silica by Optical Fiber Sensor." In 2018 SBFoton International Optics and Photonics Conference (SBFoton IOPC). IEEE, 2018. http://dx.doi.org/10.1109/sbfoton-iopc.2018.8610896.

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Spencer, Laura, Glenn J. Rix, and Patricia Gallagher. "Colloidal Silica Gel and Sand Mixture Dynamic Properties." In Geotechnical Earthquake Engineering and Soil Dynamics Congress IV. Reston, VA: American Society of Civil Engineers, 2008. http://dx.doi.org/10.1061/40975(318)101.

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Gallagher, Patricia M., and Yuanzhi Lin. "Column Testing to Determine Colloidal Silica Transport Mechanisms." In Geo-Frontiers Congress 2005. Reston, VA: American Society of Civil Engineers, 2005. http://dx.doi.org/10.1061/40783(162)15.

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Eling, Charlotte J., Nicolas Laurand, Naresh-Kumar Gunasekar, Paul R. Edwards, and Robert W. Martin. "Silica Coated Colloidal Semiconductor Quantum Dot Supracrystal Microlasers." In 2022 IEEE Photonics Conference (IPC). IEEE, 2022. http://dx.doi.org/10.1109/ipc53466.2022.9975748.

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Patel, Zina, Jacob M. Berlin, and Wafa Abidi. "Nanoparticle-neural stem cells for targeted ovarian cancer treatment: optimization of silica nanoparticles for efficient drug loading." In Colloidal Nanoparticles for Biomedical Applications XIII, edited by Xing-Jie Liang, Wolfgang J. Parak, and Marek Osiński. SPIE, 2018. http://dx.doi.org/10.1117/12.2316599.

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Reports on the topic "Colloidal silica"

Hunt, J., S. Ezzedine, W. Bourcier, and S. Roberts. Applications of Geothermally-Produced Colloidal Silica in Reservoir Management - Smart Gels. Office of Scientific and Technical Information (OSTI), June 2013. http://dx.doi.org/10.2172/1088442.

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Lundy, D. Z., J. C. Hunter-Cevera, and G. J. Moridis. Susceptibility of polysiloxane and colloidal silica to degradation by soil microorganisms. Office of Scientific and Technical Information (OSTI), November 1997. http://dx.doi.org/10.2172/578622.

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Ramaye, Y., V. Kestens, J. Charoud-Got, S. Mazoua, G. Auclair, T. J. Cho, B. Toman, V. A. Hackley, and T. Linsinger. Certification of Standard Reference Material® 1992 / ERM®-FD305 Zeta Potential – Colloidal Silica (Nominal Mass Fraction 0.15 %). National Institute of Standards and Technology, November 2020. http://dx.doi.org/10.6028/nist.sp.260-208.

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Ramaye, Y., V. Kestens, J. Charoud-Got, S. Mazoua, G. Auclair, T. J. Cho, B. Toman, V. A. Hackley, and T. Linsinger. Certification of Standard Reference Material® 1993 / ERM®-FD306 Zeta Potential – Colloidal Silica (Nominal Mass Fraction 2.2 %). National Institute of Standards and Technology, November 2020. http://dx.doi.org/10.6028/nist.sp.260-209.

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Huang, Cihang, Yen-Fang Su, and Na Lu. Self-Healing Cementitious Composites (SHCC) with Ultrahigh Ductility for Pavement and Bridge Construction. Purdue University, 2021. http://dx.doi.org/10.5703/1288284317403.

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Cracks and their formations in concrete structures have been a common and long-lived problem, mainly due to the intrinsic brittleness of the concrete. Concrete structures, such as rigid pavement and bridge decks, are prone to deformations and deteriorations caused by shrinkage, temperature fluctuation, and traffic load, which can affect their service life. Rehabilitation of concrete structures is expensive and challenging—not only from maintenance viewpoints but also because they cannot be used for services during maintenance. It is critical to significantly improve the ductility of concrete to overcome such issues and to enable better infrastructure quality. To this end, the self-healing cementitious composites (SHCC) investigated in this work could be a promising solution to the aforementioned problems. In this project, the team has designed a series of cementitious composites to investigate their mechanical performances and self-healing abilities. Firstly, various types of fibers were investigated for improving ductility of the designed SHCC. To enhance the self-healing of SHCC, we proposed and examined that the combination of the internal curing method with SHCC mixture design can further improve self-healing performance. Three types of internal curing agents were used on the SHCC mixture design, and their self-healing efficiency was evaluated by multiple destructive and non-destructive tests. Results indicated a significant improvement in the self-healing capacity with the incorporation of internal curing agents such as zeolite and lightweight aggregate. To control the fiber distribution and workability of the SHCC, the mix design was further adjusted by controlling rheology using different types of viscosity modifiers. The team also explored the feasibility of the incorporation of colloidal nano-silica into the mix design of SHCC. Results suggest that optimum amounts of nano-silica have positive influence on self-healing efficiency and mechanical properties of the SHCC. Better hydration was also achieved by adding the nano-silica. The bonding strength of the SHCC with conventional concrete was also improved. At last, a standardized mixing procedure for the large scale SHCC was drafted and proposed.

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Seright, R., and F. Martin. Fluid diversion and sweep improvement with chemical gels in oil recovery processes. [Four types of gels: resorcinol-formaldehyde; colloidal silica; Cr sup 3+ (chloride)-xanthan; and Cr sup 3+ (acetate)-polyacrylamide]. Office of Scientific and Technical Information (OSTI), September 1992. http://dx.doi.org/10.2172/7233798.

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Beam, Jeremiah. Actinide (III/IV) - Silica Colloids in the WIPP. Office of Scientific and Technical Information (OSTI), November 2022. http://dx.doi.org/10.2172/1897411.

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Essmann, Hannes, Ryan Bock, V. K. Pujari, and F. F. Lange. Shape Forming via Colloidal Isopressing: Reformulating a Commerical Silicon Nitride Slurry with a Commercial Silane. Fort Belvoir, VA: Defense Technical Information Center, May 2003. http://dx.doi.org/10.21236/ada414748.

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