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Journal articles on the topic 'Surface-Modification of silica nanoparticles'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Jenie, Aisyiyah S. N., Fransiska S. H. Krismastuti, Yudia P. Ningrum, et al. "Geothermal silica-based fluorescent nanoparticles for the visualization of latent fingerprints." Materials Express 10, no. 2 (2020): 258–66. http://dx.doi.org/10.1166/mex.2020.1551.

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The development of silica nanoparticles from the waste of geothermal power plants and their subsequent modification using a fluorescent dye, rhodamine 6G (R-6G), has been reported. The optimum specific surface area of the silica nanoparticles before modification was 289.2 m2 g–1. After modification, the intrinsic properties of the fluorescent silica nanoparticles were studied, and the results showed that they were in their amorphous phase, with a particle size of 5–10 nm. We proposed that the interaction between R-6G and the silica nanoparticle surface was due to the hydrogen bonding, using th

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2

Pelto, Jani, Tony Munter, Outi Härkki, and Juha Sarlin. "Surface Modification of Nanosilica for PP Composites." Materials Science Forum 714 (March 2012): 91–98. http://dx.doi.org/10.4028/www.scientific.net/msf.714.91.

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Due to its high purity, favourable surface chemistry and huge specific surface area, fumed silica nanoparticlesare suitable inorganic nanoscopic templates for organic modification and nanocomposite studies. Polypropylene offers good properties with low or moderate cost for many technical applications, such as for solid dielectrics. Polypropylene and hydrophilic silica nanoparticles have inherently dissimilar surface chemistries and organic modification of the silica is usually needed to achieve good mixing and nanocomposite properties. Thetarget is to study robust grafting methods which can be

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3

Ellateif, Tayseir M. Abd, Saikat Mitra, T. Murugesan, and Khairun Azizi Azizli. "Preparation and Characterization of Hydrophobic Silica Zirconium Nanoparticles." Applied Mechanics and Materials 625 (September 2014): 503–8. http://dx.doi.org/10.4028/www.scientific.net/amm.625.503.

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Hydrophobic silica nanoparticles were synthesized by silica sols modified with different percentage of zirconium sol using liquid modification. The hydrophobicity test demonstrated that silica zirconium nanoparticles are more hydrophobic as they showed 1% to 5% weight gain compared to 8% for pure silica nanoparticles. The synthesized silica nanoparticles were characterized using different techniques to investigate the effect of zirconium modification on silica nanoparticles characteristics. Structure and composition of unmodified silica nanoparticles and modified one were studied using FTIR; t

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4

Kil, Dae-Sup, Hee-Dong Jang, Han-Kwon Chang, et al. "Surface Modification Silica Nanoparticles by Aerosol Self Assembly." Korean Journal of Materials Research 20, no. 2 (2010): 78–81. http://dx.doi.org/10.3740/mrsk.2010.20.2.78.

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5

Park, Jung Tae, Jin Ah Seo, Sung Hoon Ahn, Jong Hak Kim, and Sang Wook Kang. "Surface modification of silica nanoparticles with hydrophilic polymers." Journal of Industrial and Engineering Chemistry 16, no. 4 (2010): 517–22. http://dx.doi.org/10.1016/j.jiec.2010.03.030.

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6

Dai, Caili, Shilu Wang, Yuyang Li, et al. "The first study of surface modified silica nanoparticles in pressure-decreasing application." RSC Advances 5, no. 76 (2015): 61838–45. http://dx.doi.org/10.1039/c5ra09883a.

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7

Brassard, Jean Denis, Dilip K. Sarkar, and Jean Perron. "Surface Modification and Functionalization of Oxide Nanoparticles for Superhydrophobic Applications." Advanced Materials Research 409 (November 2011): 469–73. http://dx.doi.org/10.4028/www.scientific.net/amr.409.469.

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Oxide nanoparticles have tremendous technological applications in the present days in diverse fields. In this study, the surface modification and functionalization of hydrophilic silica (SiO2) and zinc oxide (ZnO) nanoparticles were performed to obtain superhydrophobicity. Monodispersive nanoparticles of SiO2were prepared by Stöber process using tetraethoxysilane (Si (OC2H5)4) as a precursor and ammonium hydroxide as a catalyst in a ethanolic solution. The surface modification of the silica nanoparticles were performed using fluoroalkylsilane (FAS-17: C16H19F17O3Si) molecules to obtain fluorin

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8

Lee, A.-Rang, Kibeom Nam, Byeong Jun Lee, et al. "Hepatic Cellular Distribution of Silica Nanoparticles by Surface Energy Modification." International Journal of Molecular Sciences 20, no. 15 (2019): 3812. http://dx.doi.org/10.3390/ijms20153812.

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The cellular distribution of silica nanoparticles (NPs) in the liver is not well understood. Targeting specific cells is one of the most important issues in NP-based drug delivery to improve delivery efficacy. In this context, the present study analyzed the relative cellular distribution pattern of silica NPs in the liver, and the effect of surface energy modification on NPs. Hydrophobic NP surface modification enhanced NP delivery to the liver and liver sinusoid fFendothelial cells (LSECs). Conversely, hydrophilic NP surface modification was commensurate with targeting hepatic stellate cells

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9

Wahyuningsih, Kendri, Sri Yuliani, and Hoerudin Hoerudin. "Characteristics of Silica Nanoparticles from Rice Husk as Influenced by Surface Modification with Used Solvent Containing Silane." Journal of Engineering and Technological Sciences 53, no. 4 (2021): 210403. http://dx.doi.org/10.5614/j.eng.technol.sci.2021.53.4.3.

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Silica extracted from rice husk (silica nanoparticles, Si-NP RHA) has great potential for industrial use, particularly as filler in the rubber industry. However, silica is poorly dispersed in the matrix and needs to be modified by a silane linking agent (bis-(3-triethoxysilylpropyl) tetrasulfane (TESPT)) to improve its mixing properties. As a result, a large amount of used solvent containing silane TESPT is produced. This study aimed to evaluate the surface modification of silica nanoparticles from rice husk employing this used solvent and to characterize the particles’ physical properties. Si

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10

Jung, Hak-Sung, Doo-Sik Moon, and Jin-Kyu Lee. "Quantitative Analysis and Efficient Surface Modification of Silica Nanoparticles." Journal of Nanomaterials 2012 (2012): 1–8. http://dx.doi.org/10.1155/2012/593471.

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Aminofunctional trialkoxysilanes such as aminopropyltrimethoxysilane (APTMS) and (3-trimethoxysilylpropyl)diethylenetriamine (DETAS) were employed as a surface modification molecule for generating monolayer modification on the surface of silica (SiO2) nanoparticles. We were able to quantitatively analyze the number of amine functional groups on the modified SiO2nanoparticles by acid-base back titration method and determine the effective number of amine functional groups for the successive chemical reaction by absorption measurements after treating with fluorescent rhodamine B isothiocyanate (R

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11

Li, Shidong, Yeap Hung Ng, Hon Chung Lau, Ole Torsæter, and Ludger P. Stubbs. "Experimental Investigation of Stability of Silica Nanoparticles at Reservoir Conditions for Enhanced Oil-Recovery Applications." Nanomaterials 10, no. 8 (2020): 1522. http://dx.doi.org/10.3390/nano10081522.

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To be effective enhanced oil-recovery (EOR) agents, nanoparticles must be stable and be transported through a reservoir. However, the stability of a nanoparticle suspension at reservoir salinity and temperature is still a challenge and how it is affected by reservoir rocks and crude oils is not well understood. In this work, for the first time, the effect of several nanoparticle treatment approaches on the stability of silica nanoparticles at reservoir conditions (in the presence of reservoir rock and crude oil) was investigated for EOR applications. The stability of nanoparticle suspensions w

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12

Mitarotonda, Romina, Martín Saraceno, Marcos Todone, et al. "Surface chemistry modification of silica nanoparticles alters the activation of monocytes." Therapeutic Delivery 12, no. 6 (2021): 443–59. http://dx.doi.org/10.4155/tde-2021-0006.

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Aim: Nanoparticles (NPs) interaction with immune system is a growing topic of study. Materials & methods: Bare and amine grafted silica NPs effects on monocytes/macrophages cells were analyzed by flow cytometry, MTT test and LIVE/DEAD® viability/cytotoxicity assay. Results: Bare silica NPs inhibited proliferation and induced monocyte/macrophages activation (increasing CD40/CD80 expression besides pro-inflammatory cytokines and nitrite secretion). Furthermore, silica NPs increased cell membrane damage and reduced the number of living cells. In contrast, amine grafted silica NPs did not alte

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13

Tian, Jianwen, Haoxuan Zhang, Meiying Liu, et al. "A bioinspired strategy for surface modification of silica nanoparticles." Applied Surface Science 357 (December 2015): 1996–2003. http://dx.doi.org/10.1016/j.apsusc.2015.09.171.

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14

Yan, Huiqiong, Xiuqiong Chen, Chaoling Bao, Shuxian Wu, Songming He, and Qiang Lin. "Alginate derivative-functionalized silica nanoparticles: surface modification and characterization." Polymer Bulletin 77, no. 1 (2019): 73–84. http://dx.doi.org/10.1007/s00289-019-02736-9.

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15

Yoo, Jeseung, Yongbeom Kim, Suyong Kwon, Joohyun Lee, and Young-Soo Seo. "Surge-Resistant Nanocomposite Enameled Wire Using Silica Nanoparticles with Binary Chemical Compositions on the Surface." Journal of Nanomaterials 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/231672.

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We developed polyesterimide (PEI) nanocomposite enameled wires using surface-modified silica nanoparticles with binary chemical compositions on the surface. The modification was done using silanes assisted by ultrasound, which facilitated high density modification. Two different trimethoxysilanes were chosen for the modification on the basis of resemblance of chemical compositions on the silica surface to PEI varnish. The surface-modified silica was well dispersed in PEI varnish, which was confirmed by optical observation and viscosity measurement. The glass transition temperature of the silic

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16

Barros, Caio H. N., Henry Devlin, Dishon W. Hiebner, Stefania Vitale, Laura Quinn, and Eoin Casey. "Enhancing curcumin's solubility and antibiofilm activity via silica surface modification." Nanoscale Advances 2, no. 4 (2020): 1694–708. http://dx.doi.org/10.1039/d0na00041h.

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17

Li, Sha-Sha, Zao Tian, De-Zhan Tian, Lei Fang, Yu-Wei Huang, and Jing Xu. "Preparation and Surface Modification of Magnetic Fe3O4 Nanoparticles." Advanced Science, Engineering and Medicine 12, no. 2 (2020): 131–36. http://dx.doi.org/10.1166/asem.2020.2479.

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In this work, the coprecipitation method was used to prepare the magnetic Fe3O4 nanoparticles which were characterized by X-ray diffraction (XRD), vibrating sample magnetometer (VSM), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The particle size and saturation magnetization of Fe3O4 nanoparticles were significant effected by temperature and the precipitant's precipitation time. Under the reaction temperature of 40 °C and the dropping time of 10 h, the size and the saturation magnetization of magnetic Fe3O4 nanoparticles were 9.4 nm and 37.5 emu/g, severally.

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18

Qu, Qin, and Shan Tang Liu. "Coating Time Effect on Surface Structures of Silica-Encapsulated Gold Nanoparticles." Advanced Materials Research 79-82 (August 2009): 935–38. http://dx.doi.org/10.4028/www.scientific.net/amr.79-82.935.

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This paper reports the silica density, surface structures and optical properties of gold nanoparticles coated with different thickness of silica shells. The gold nanoparticles encapsulated with amorphous silica shells were prepared in a slight modification of Stǒber method. The silica-shell thickness could be varied from 20 to 50 nm by controlling the experimental conditions, such as reaction time. Transmission Electron Microscopy (TEM) and UV-Visible absorption spectroscopy were employed to characterize the size, shell density, surface structures and the optical properties of these silica-coa

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19

Kim, Young-Jae, Shin-Woo Ha, Seung-Min Jeon, et al. "Fabrication of Triacetylcellulose−SiO2Nanocomposites by Surface Modification of Silica Nanoparticles." Langmuir 26, no. 10 (2010): 7555–60. http://dx.doi.org/10.1021/la904362x.

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20

Bracho, Diego, Vivianne N. Dougnac, Humberto Palza, and Raúl Quijada. "Functionalization of Silica Nanoparticles for Polypropylene Nanocomposite Applications." Journal of Nanomaterials 2012 (2012): 1–8. http://dx.doi.org/10.1155/2012/263915.

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Synthetic silica nanospheres of 20 and 100 nm diameter were produced via the sol-gel method to be used as filler in polypropylene (PP) composites. Modification of the silica surface was further performed by reaction with organic chlorosilanes in order to improve the particles interaction with the hydrophobic polyolefin matrix. These nanoparticles were characterized using transmission electronic microscopy (TEM), elemental analysis, thermogravimetric analysis (TGA), and solid-state nuclear magnetic resonance (NMR) spectroscopy. For unmodified silica, it was found that the 20 nm particles have a

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21

Jarnthong, Methakarn, Zheng Peng, Charoen Nakason, and Natinee Lopattananon. "Surface Modification of Silica Nanoparticles for Reinforcement of Epoxidized Natural Rubber." Advanced Materials Research 93-94 (January 2010): 370–76. http://dx.doi.org/10.4028/www.scientific.net/amr.93-94.370.

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Epoxidized natural rubber (ENR) based nanocomposites were prepared by mixing ENR latex (epoxide content of 35 mole%) with silica nanoparticles (SiO2). SiO2 were previously treated with 3-aminopropyltriethoxysilane (APS) and 3-methacryloxypropyltrimethoxysilane (MPS). Morphological and mechanical properties of ENR/SiO2 composites were investigated. The dispersion of SiO2 in ENR matrix, which was characterized by SEM, indicated that the treated SiO2 exhibited better dispersion than that of the untreated SiO2. Moreover, it has been found that the modified SiO2 with either APS or MPS gave much sig

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22

Wei, Shah Kwok. "Surface Modification of Silver Nanoparticles in Phase Change Materials for Building Energy Application." Advanced Materials Research 622-623 (December 2012): 889–92. http://dx.doi.org/10.4028/www.scientific.net/amr.622-623.889.

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In this report, we propose a direct silica-coating technique to enhance the stability of silver nanoparticles as a doping additive to enhance the thermal conductivity phase change materials (PCM). Our experimental results show that a thin layer of silica can protect silver nanoparticles and help retain its intrinsic metallic properties, when subjected to harsh corrosive environments found in PCM media. Furthermore, PCM materials can be effectively used to cool the ambient temperature of a building room by up to ~1.2 degree Celsius. Our preliminary results demonstrate a real opportunity in air-

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23

Wang, Yilong, Hong Xu, Weili Qiang, Hongchen Gu, and Donglu Shi. "Asymmetric Composite Nanoparticles with Anisotropic Surface Functionalities." Journal of Nanomaterials 2009 (2009): 1–5. http://dx.doi.org/10.1155/2009/620269.

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Asymmetric inorganic/organic composite nanoparticles with anisotropic surface functionalities represent a new approach for creating smart materials, requiring the selective introduction of chemical groups to dual components of composite, respectively. Here, we report the synthesis of snowman-like asymmetric silica/polystyrene heterostructure with anisotropic functionalities via a chemical method, creating nanostructure possibly offering two-sided biologic accessibility through the chemical groups. Carboxyl group was introduced to polystyrene component of the snowman-like composites by miniemul

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24

Yuan, Jin-Tao, Zhou Wang, Lan Wang та Rui-Jiang Liu. "Preparation, Surface Modification, and Characteristic of α-Fe2O3 Nanoparticles". Journal of Nanoscience and Nanotechnology 20, № 5 (2020): 3031–37. http://dx.doi.org/10.1166/jnn.2020.17445.

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The α-Fe2O3 nanoparticles were prepared via the co-precipitation process, and they were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and selected area electron diffraction (SAED). The effect of the water bath temperature on the average grain size of the α-Fe2O3 nanoparticles was investigated. The minimum grain size of the α-Fe2O3 nanoparticles was 19.6 nm when the water bath temperature was 40 °C. Furthermore, the α-Fe2O3 nanoparticles were successfully modified with silica (SiO2) and chitosan (CTS) using the idea of nanoa

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25

Yang, Bingyu, Loïc Leclercq, Jean-Marc Clacens, and Véronique Nardello-Rataj. "Acidic/amphiphilic silica nanoparticles: new eco-friendly Pickering interfacial catalysis for biodiesel production." Green Chemistry 19, no. 19 (2017): 4552–62. http://dx.doi.org/10.1039/c7gc01910f.

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26

Erdem, Sezer, Beyhan Erdem, and Ramis Mustafa Öksüzoğlu. "Magnetic Nano-Sized Solid Acid Catalyst Bearing Sulfonic Acid Groups for Biodiesel Synthesis." Open Chemistry 16, no. 1 (2018): 923–29. http://dx.doi.org/10.1515/chem-2018-0092.

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AbstractIn our approach for magnetic iron oxide nanoparticles surface modification, the fabrication of an inorganic shell, consisting of silica by the deposition of preformed colloids onto the nanoparticle surface and functionalization of these particles, was realized. The magnetic nanoparticles, non-coated and coated with silica layer by Stöber method, are functionalized with chlorosulfonic acid. The magnetic nanoparticles (MNPs), in size of 10-13 nm, could be used as acid catalyst in biodiesel production and show superparamagnetic character. The prepared nanoparticles were characterized by d

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27

Fritsch-Decker, Susanne, Zhen An, Jin Yan, et al. "Silica Nanoparticles Provoke Cell Death Independent of p53 and BAX in Human Colon Cancer Cells." Nanomaterials 9, no. 8 (2019): 1172. http://dx.doi.org/10.3390/nano9081172.

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Several in vitro studies have suggested that silica nanoparticles (NPs) might induce adverse effects in gut cells. Here, we used the human colon cancer epithelial cell line HCT116 to study the potential cytotoxic effects of ingested silica NPs in the presence or absence of serum. Furthermore, we evaluated different physico-chemical parameters important for the assessment of nanoparticle safety, including primary particle size (12, 70, 200, and 500 nm) and surface modification (–NH2 and –COOH). Silica NPs triggered cytotoxicity, as evidenced by reduced metabolism and enhanced membrane leakage.

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28

Boakye-Ansah, Stephen, Matthew S. Schwenger, and Martin F. Haase. "Designing bijels formed by solvent transfer induced phase separation with functional nanoparticles." Soft Matter 15, no. 16 (2019): 3379–88. http://dx.doi.org/10.1039/c9sm00289h.

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29

Bagwe, Rahul P., Lisa R. Hilliard, and Weihong Tan. "Surface Modification of Silica Nanoparticles to Reduce Aggregation and Nonspecific Binding." Langmuir 22, no. 9 (2006): 4357–62. http://dx.doi.org/10.1021/la052797j.

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30

Choudhary, Bharti, Santa Chawla, K. Jayanthi, K. N. Sood, and Sukhvir Singh. "Synthesis and surface modification of ZnO:Cu nanoparticles by silica and PMMA." Current Applied Physics 10, no. 3 (2010): 807–12. http://dx.doi.org/10.1016/j.cap.2009.09.019.

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31

Rahman, Ismail Ab, and Vejayakumaran Padavettan. "Synthesis of Silica Nanoparticles by Sol-Gel: Size-Dependent Properties, Surface Modification, and Applications in Silica-Polymer Nanocomposites—A Review." Journal of Nanomaterials 2012 (2012): 1–15. http://dx.doi.org/10.1155/2012/132424.

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Application of silica nanoparticles as fillers in the preparation of nanocomposite of polymers has drawn much attention, due to the increased demand for new materials with improved thermal, mechanical, physical, and chemical properties. Recent developments in the synthesis of monodispersed, narrow-size distribution of nanoparticles by sol-gel method provide significant boost to development of silica-polymer nanocomposites. This paper is written by emphasizing on the synthesis of silica nanoparticles, characterization on size-dependent properties, and surface modification for the preparation of

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32

Scheid, D., D. Stock, T. Winter, T. Gutmann, C. Dietz, and M. Gallei. "The pivotal step of nanoparticle functionalization for the preparation of functional and magnetic hybrid opal films." Journal of Materials Chemistry C 4, no. 11 (2016): 2187–96. http://dx.doi.org/10.1039/c5tc04388c.

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33

Park, Moo Eon, and Jeong Ho Chang. "Polyamine Group Assembled Silica Coated Ferrite Nanoparticle or Lambda DNA Detection." Materials Science Forum 534-536 (January 2007): 1357–60. http://dx.doi.org/10.4028/www.scientific.net/msf.534-536.1357.

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This study describes the development of a high throughput purification process of nucleic acid using amino-functionalized silica coated ferrite nanoparticles. The magnetic ferrite nanoparticles were synthesized and coated by a silica precursor in controlling the coating thicknesses and sizeses. The surface modification was performed with amino-functionalized organic silanes on silica coated magnetic nanoparticles. The spectroscopic measurements such as a FT-IR (ATR-method) and Vibrational Sample Magnetometer (VSM) were used to characterize the chemical structures and magnetic strengths. To elu

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34

Heng, Chunning, Meiying Liu, Ke Wang, et al. "Fabrication of silica nanoparticle based polymer nanocomposites via a combination of mussel inspired chemistry and SET-LRP." RSC Advances 5, no. 111 (2015): 91308–14. http://dx.doi.org/10.1039/c5ra19658b.

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35

Amamoto, Takaki, Satoshi Hirakawa, Tomofumi Santa, Takashi Funatsu, and Masaru Kato. "Surface modification of silica nanoparticles using 4-aryloxy boron dipyrromethene (BODIPY) enhances skin permeation." Journal of Materials Chemistry B 4, no. 47 (2016): 7676–80. http://dx.doi.org/10.1039/c6tb02188c.

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36

Niu, Yuting, Meihua Yu, Anand Meka, et al. "Understanding the contribution of surface roughness and hydrophobic modification of silica nanoparticles to enhanced therapeutic protein delivery." Journal of Materials Chemistry B 4, no. 2 (2016): 212–19. http://dx.doi.org/10.1039/c5tb01911g.

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The contribution of the surface roughness and hydrophobic modification of silica nanoparticles to enhanced therapeutic protein delivery, including adsorption, sustained release, cellular uptake and endo/lysosomal escape.

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Pauly, Céline Schmitt, Anne-Caroline Genix, Johan G. Alauzun, Michael Sztucki, Julian Oberdisse, and P. Hubert Mutin. "Surface modification of alumina-coated silica nanoparticles in aqueous sols with phosphonic acids and impact on nanoparticle interactions." Physical Chemistry Chemical Physics 17, no. 29 (2015): 19173–82. http://dx.doi.org/10.1039/c5cp01925g.

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Ahmed, Afaque, Ismail Mohd Saaid, Abdelazim Abbas Ahmed, Rashidah M. Pilus, and Mirza Khurram Baig. "Evaluating the potential of surface-modified silica nanoparticles using internal olefin sulfonate for enhanced oil recovery." Petroleum Science 17, no. 3 (2019): 722–33. http://dx.doi.org/10.1007/s12182-019-00404-1.

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AbstractRecently, nanoparticles have proven to enhance oil recovery on the core-flood scale in challenging high-pressure high-temperature reservoirs. Nanomaterials generally appear to improve oil production through wettability alteration and reduction in interfacial tension between oil and water phases. Besides, they are environmentally friendly and cost-effective enhanced oil recovery techniques. Studying the rheological properties of nanoparticles is critical for field applications. The instability of nanoparticle dispersion due to aggregation is considered as an unfavorable phenomenon in na

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Khdary, Nezar H., and Mohamed A. Ghanem. "Highly dispersed platinum nanoparticles supported on silica as catalyst for hydrogen production." RSC Adv. 4, no. 91 (2014): 50114–22. http://dx.doi.org/10.1039/c4ra09341k.

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A synthetic approach is developed to produce highly disperse, low loading (3.28 wt%) Pt nanoparticles incorporated silica (Pt-NP–S) with average diameter of 3.5 nm using economical and simple surface chemical modification and reduction processes.

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Kim, Min Wook, Il Jae Moon, Hyoung Jin Choi, and Yongsok Seo. "Facile fabrication of core/shell structured SiO2/polypyrrole nanoparticles with surface modification and their electrorheology." RSC Advances 6, no. 61 (2016): 56495–502. http://dx.doi.org/10.1039/c6ra10349a.

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We synthesized conductive polypyrrole (PPy) coated silica core–shell structured nanoparticles, and investigated their electrorheological (ER) characteristics under electric fields applied when dispersed in silicone oil.

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Metin, Cigdem, Roger T. Bonnecaze, and Quoc P. Nguyen. "The Viscosity of Silica Nanoparticle Dispersions in Permeable Media." SPE Reservoir Evaluation & Engineering 16, no. 03 (2013): 327–32. http://dx.doi.org/10.2118/157056-pa.

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Summary The potential application of nanoparticle dispersions as formation-stimulation agents, contrast agents, or simply as tracers in the upstream oil and gas industry requires knowledge of the flow properties of these nanoparticles. The modeling of nanoparticle transport in hydrocarbon reservoirs requires a comprehensive understanding of the rheological behavior of these nanofluids. Silica nanoparticles have been commonly used because of their low-cost fabrication and cost-effective surface modification. The aqueous silica-nanoparticle dispersions show Newtonian behavior under steady shear

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Nur, Hadi. "Modification of titanium surface species of titania by attachment of silica nanoparticles." Materials Science and Engineering: B 133, no. 1-3 (2006): 49–54. http://dx.doi.org/10.1016/j.mseb.2006.05.003.

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43

He, Wentao, Danhua Wu, Juan Li, et al. "Surface Modification of Colloidal Silica Nanoparticles: Controlling the size and Grafting Process." Bulletin of the Korean Chemical Society 34, no. 9 (2013): 2747–52. http://dx.doi.org/10.5012/bkcs.2013.34.9.2747.

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44

Kim, Young-Jae, Jong-Heon Kim, Shin-Woo Ha, Dongil Kwon, and Jin-Kyu Lee. "Polyimide nanocomposites with functionalized SiO2 nanoparticles: enhanced processability, thermal and mechanical properties." RSC Adv. 4, no. 82 (2014): 43371–77. http://dx.doi.org/10.1039/c4ra04952g.

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SiO<sub>2</sub>–polyimide nanocomposites having enhanced processability, thermal and mechanical properties were easily fabricated by the surface modification of silica nanoparticles with functional groups having chemical and structural similarity to polyimide chain.

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Vakhneev, S. N., and Minggong Sha. "Preparation and Characterization of Magnetite – Silica Core – Shell Nanoparticles." International Journal of Circuits, Systems and Signal Processing 15 (September 15, 2021): 1457–63. http://dx.doi.org/10.46300/9106.2021.15.158.

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In this study, two types of ligands were introduced onto the surface of magnetite nanoparticles by hydrolysis and condensation of organosilicon reagents: organosilane-tetraethoxysilane (TEOS) and aminoorganosilane - aminopropyltriethoxysilane (APTES). It is shown that coatings based on SiO2 solve a double problem: first, they prevent the aggregation of nanoparticles and the oxidation of magnetite; secondly, they allow the surface to be modified with various specific ligands for biomedical applications due to terminal groups. It was shown, that after the modification of TEOS and APTES (in argon

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Lai, Sun-Mou, and Pei-Wen Li. "Effect of Thermoplastic Polyurethane-Modified Silica on Melt-Blended Poly(Lactic Acid) (PLA) Nanocomposites." Polymers and Polymer Composites 25, no. 8 (2017): 583–92. http://dx.doi.org/10.1177/096739111702500803.

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3-aminopropyltriethoxysilane (APTES) was used as a coupling agent to graft thermoplastic polyurethane (TPU) onto a nanosilica surface. The modification of TPU on the surface of silica nanoparticles was confirmed by FTIR, NMR, ESCA and TGA assessment. The grafting degree of TPU onto the silica was about 7.3%. The incorporation of surface-modified silica (TAS50) into poly(lactic acid) (PLA) induced the nucleation of PLA, giving a higher crystallisation peak temperature, which would be advantageous for fast processing cycles in the commercial moulding process. With pristine silica incorporated in

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KOTNAROWSKA, Danuta. "INFLUENCE OF CLIMATIC AGEING ON EROSIVE WEAR KINETICS OF POLYMER NANOCOATINGS." Tribologia 278, no. 2 (2018): 57–65. http://dx.doi.org/10.5604/01.3001.0012.6976.

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The paper presents the results of erosive resistance investigation carried out on three-layer epoxy-polyurethane coating systems of different polyurethane top coat composition. Alumina nanoparticles with a grain size of 20 nm or silica nanoparticles with a grain size of 12 or 20 nm were applied for the top coat modification. Coating systems with top coats modified using silica nanoparticles with the grain size of 12 nm (nanocoatings) revealed the highest erosive resistance, whereas the lowest one was observed in the case of coating systems with unmodified top coats. Lower erosive wear intensit

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Alterary, Seham S., and Anfal AlKhamees. "Synthesis, surface modification, and characterization of Fe3O4@SiO2 core@shell nanostructure." Green Processing and Synthesis 10, no. 1 (2021): 384–91. http://dx.doi.org/10.1515/gps-2021-0031.

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Abstract In recent times, nanoparticles have been the focal point of research in nanoscience due to their wide scope of potential applications in all fields of science. Iron oxide (Fe3O4) nanoparticles (NPs) show incredible magnetic saturation, stability, biocompatibility, and intuitive properties on the surface, which makes them ideal for being utilized in several ways. In the present study, Fe3O4 NPs were synthesized by co-precipitation and further coated with silica (SiO2) to avoid aggregation. Synthesized nanoparticles (Fe3O4@SiO2) were individually functionalized using glycine and malonic

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Rende, Deniz, Linda S. Schadler, and Rahmi Ozisik. "Controlling Foam Morphology of Poly(methyl methacrylate) via Surface Chemistry and Concentration of Silica Nanoparticles and Supercritical Carbon Dioxide Process Parameters." Journal of Chemistry 2013 (2013): 1–13. http://dx.doi.org/10.1155/2013/864926.

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Polymer nanocomposite foams have received considerable attention because of their potential use in advanced applications such as bone scaffolds, food packaging, and transportation materials due to their low density and enhanced mechanical, thermal, and electrical properties compared to traditional polymer foams. In this study, silica nanofillers were used as nucleating agents and supercritical carbon dioxide as the foaming agent. The use of nanofillers provides an interface upon which CO2nucleates and leads to remarkably low average cell sizes while improving cell density (number of cells per

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Tong, Xin Li, Zhi Dong Wu, Xuan Luo, Yong Tao Yan, and Yan Hua Wang. "Synthesis of the Gold-Supported Chitosan-Modified Nanomaterials and Effect of Preparation Conditions." Applied Mechanics and Materials 455 (November 2013): 77–82. http://dx.doi.org/10.4028/www.scientific.net/amm.455.77.

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In the present work, a new composite gold-supported chitosan-silica (Au/CS-SiO2) nanomaterial has been synthesized via organic modification and chemical reduction method. Firstly, the hybrid chitosan-silica (CS-SiO2) material was synthesized by modification of silica with chitosan under suitable reaction conditions. Furthermore, based on the ligand effect of chitosan molecule and the reduction ability of organic alcohols and ascorbic acid, gold nanoparticles were generated and fixed on the surface of hybrid CS-SiO2 material, which successfully leading to production of the composite Au/CS-SiO2

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