Dispersion stability and rheological behavior of suspensions of polystyrene coated fumed silica particles in polystyrene solutions

Yin, Xianze; Tan, Yi; Song, Yihu; Zheng, Qiang

doi:10.1007/s10118-012-1099-1

Cited by 7 publications

(2 citation statements)

References 57 publications

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“…On the basis of chemical interaction, the silylation of hydroxyl groups using organoalkoxysilanes is the most commonly used method for surface modification of silica particles. − Other modifiers have been proposed to avoid some drawbacks accompanying the silylation reaction as some silanols groups of the coupling agent might remain in the product causing further condensation reactions during the period of storage and usage of the formed nanopolymer sol. Those modifiers include alcohols, carboxylic acids, and polymers. ,− …”

Section: Introductionmentioning

confidence: 99%

Rheological Behavior of Surface Modified Silica Nanoparticles Dispersed in Partially Hydrolyzed Polyacrylamide and Xanthan Gum Solutions: Experimental Measurements, Mechanistic Understanding, and Model Development

et al. 2018

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Polymer solutions are designed to develop a favorable mobility ratio between the injected polymer solution and the oil–water bank being displaced by the polymer. Subsequently, a more uniform volumetric sweep of the reservoir is produced. Chemical and mechanical degradation of the polymer solutions, on the other hand, reduce their viscosity which significantly affects their performance. The primary objective of this study is to investigate the effect of surface modification of silica nanoparticles (NPs) on the effective viscosity of partially hydrolyzed polyacrylamide (HPAM) and xanthan gum (XG) solutions at different NP concentrations and temperatures. The chemical functionalization of SiO2 NPs with carboxylic acids and silanes was confirmed by FTIR measurements. The experimental results showed that the addition of SiO2 NPs increased the viscosity of XG solutions due to the formation of three-dimensional structures between the silica NPs and the polymeric chains. The thickening effect of HPAM was improved by the addition of silica NPs modified with 3-(methacryloyloxy)propyl] trimethoxysilane (MPS), octyl triethoxysilane (OTES), and oleic acid-method A (OAA). In addition, the HPAM and XG nanopolymer sols of modified silica NPs showed more temperature and brine tolerance than that of unmodified silica NPs. A model was developed based on multilayer perceptron (MLP) neural network for predicting viscosity of nanopolymer sols using 9900 data points. The MLP model was trained by Bayesian Regularization (BR), Levenberg–Marquardt (LM), Resilient Backpropagation (RB), and Scaled Conjugate Gradient (SCG) algorithms. The results revealed that the BR-MLP model outperformed the three other models and could predict all the viscosity data with an average absolute relative error of 2.46% and R 2 of 0.999.

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Section: Introductionmentioning

confidence: 99%

Rheological Behavior of Surface Modified Silica Nanoparticles Dispersed in Partially Hydrolyzed Polyacrylamide and Xanthan Gum Solutions: Experimental Measurements, Mechanistic Understanding, and Model Development

et al. 2018

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“…To improve the dispersion of SiO 2 nanoparticles in polymer matrices, various surface modification techniques have been explored. These techniques typically involve modifying the nanoparticle surfaces with flexible components with low polarity. − While this approach is effective in enhancing nanoparticle dispersion, these flexible components may act similarly to plasticizers, potentially reducing the mechanical or other properties of the nanocomposite. This highlights a need for strategies that can simultaneously increase the dispersibility of the nanoparticles and selectively strengthen their interactions with the polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

Bioinspired Organic Porous Coupling Agent for Enhancement of Nanoparticle Dispersion and Interfacial Strength

Jia,

Zhao

2024

ACS Appl. Mater. Interfaces

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Composite materials have significantly advanced with the integration of inorganic nanoparticles as fillers in polymers. Achieving fine dispersion of these nanoparticles within the composites, however, remains a challenge. This study presents a novel solution inspired by the natural structure of Xanthium. We have developed a polymer of intrinsic microporosity (PIM)-based porous coupling agent, named PCA. PCA's rigid backbone structure enhances interfacial interactions through a unique intermolecular interlocking mechanism. This approach notably improves the dispersion of SiO 2 nanoparticles in various organic solvents and lowpolarity polymers. Significantly, PCA-modified SiO 2 nanoparticles embedded in polyisoprene rubber showed enhanced mechanical properties. The Young's modulus increases to 30.7 MPa, compared to 5.4 MPa in hexadecyltrimethoxysilane-modified nanoparticles. Further analysis shows that PCA-modified composites not only become stiffer but also gain strength and ductility. This research demonstrates a novel biomimetic strategy for enhancing interfacial interactions in composites, potentially leading to stronger, more versatile composite materials.

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Rheological behaviors of a series of hyperbranched polyethers

Miao

Guo²,

et al. 2015

Chin J Polym Sci

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Dispersion stability and rheological behavior of suspensions of polystyrene coated fumed silica particles in polystyrene solutions

Cited by 7 publications

References 57 publications

Rheological Behavior of Surface Modified Silica Nanoparticles Dispersed in Partially Hydrolyzed Polyacrylamide and Xanthan Gum Solutions: Experimental Measurements, Mechanistic Understanding, and Model Development

Rheological Behavior of Surface Modified Silica Nanoparticles Dispersed in Partially Hydrolyzed Polyacrylamide and Xanthan Gum Solutions: Experimental Measurements, Mechanistic Understanding, and Model Development

Bioinspired Organic Porous Coupling Agent for Enhancement of Nanoparticle Dispersion and Interfacial Strength

Rheological behaviors of a series of hyperbranched polyethers

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