Rheological properties of silica dispersions stabilized by stereoregular poly(methyl methacrylate)

Carriere, Pascal; Feller, Jean‐François; Dupuis, Dominique; Grohens, Yves

doi:10.1016/j.jcis.2003.12.017

Cited by 16 publications

(10 citation statements)

References 27 publications

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“…The surface adsorption of nano-sized silica is related to the adsorbed substance, the solvent and the property of the solution [7]. In this study, the pH of the solution and the concentration of PEI have remarkable influences on the adsorption of PEI on HSNP.…”

Section: Adsorption Of Pei On the Surface Of Hsnpmentioning

confidence: 83%

“…Laven et al [6] introduced KCl into the silica aqueous suspension and studied the change of zeta potentials with increasing pH value and KCl concentration. Carriere et al [7] obtained well-dispersed nanosized silica suspension by adsorbing polymethyl methacrylate (PMMA) on the particle surface, and studied the effects of PMMA on the rheological properties of the suspension. Liu et al [8] investigated the adsorption of non-ionic surfactant polyacrylamide (PAM) in the silica suspension system and found that the enhanced steric force between the nanoparticles after adsorbing the PAM on the surface can hinder the aggregation among the silica nanoparticles effectively.…”

Section: Introductionmentioning

confidence: 99%

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Effects of polyethylenimine on the dispersibility of hollow silica nanoparticles

Wen

Wang

Tianyuan

et al. 2007

Front. Chem. Eng. China

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In this study, two different methods were applied to disperse hollow silica nanoparticles (HSNP); one employed polyethylenimine (PEI) as the dispersant during the synthesis processes for preparing HSNP, while the other added PEI into suspensions of the prepared HSNP and used milling treatment to achieve the desired dispersion. It was found that adding PEI during the synthesis process of HSNP had no noticeable improvement in the dispersion, while adding PEI into suspensions of the prepared HSNP and utilizing milling treatment resulted in remarkable dispersion improvement. Therefore, the latter was chosen as the method in dispersing HSNP suspensions. The adsorption of PEI on the surface of HSNP and the stability of the aqueous suspensions was investigated. The results indicated that the adsorption of PEI on the surface of HSNP would increase the repulsive energy among particles, hence reducing the agglomeration of HSNP and improving the stability of the aqueous suspensions. The change of HSNP's f potential after adding PEI and the relationship between the adsorbed amount of PEI and pH were also investigated.

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Section: Adsorption Of Pei On the Surface Of Hsnpmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Effects of polyethylenimine on the dispersibility of hollow silica nanoparticles

Wen

Wang

Tianyuan

et al. 2007

Front. Chem. Eng. China

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“…As the tangential load increases with the normal load, one can assume that the debris ejection becomes preponderant once again. Moreover, the acid-base interactions are more preponderant for the syndiotactic configuration [23]. The next analysis, between 1350 and 1100 cm À1 , will be discussed in order to confirm or not this assumption, i.e.…”

Section: Configuration and Conformation Of Pmma Debrismentioning

confidence: 95%

Wear of poly (methyl methacrylate) against a metallic surface in dry conditions

Géringer

Forest

Combrade³

2007

Polymer Engineering & Sci

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Wear of Poly (Methyl MethAcrylate), PMMA, against a metallic surface, AISI 316L stainless steel, SS, has been investigated in dry conditions. These materials have been used to simulate the degradation of the contact, femoral stem-bone cement in the field of hip prosthesis. First of all, no significant wear was observed on the 316L SS. PMMA wear has been quantified: the energy wear coefficient, slope of the line, and wear volume according to the cumulated dissipated energy, don't depend on the normal load, F N . This energy analysis allows predicting the PMMA wear depth. According to the comparison between the measured dissipated energy and the energy breaking polymer chains, mechanical dissipated energy is used essentially to transform third body structure and to expel it from the contact between the two materials. Moreover, the experimental results have highlighted the stick-slip phenomenon. Lastly, Attenuated Total Reflectance-Fourier Transform InfraRed, ATR-FTIR, and Reflection Absorption-Fourier Transform InfraRed, RA-FTIR have shown that PMMA debris configuration and conformation have changed after wear against 316L SS. The driving force of these changes seems to be the acid-base interactions between PMMA and hydroxyl groups of the stainless steel surface.

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“…The dynamic response can be deconvoluted into two components: the elastic (or storage) modulus G’ which is related to the elastic energy in the system in deformation and the viscous (or the loss) modulus G”, which is linked to the viscous dissipation of energy in the system. Rheological experiments were found to be pertinent in this study, because they already proved to be effective to characterize interactions between silica or carbon nanofillers and macromolecules, molar mass variations and reinforcement effects …”

Section: Experimental Partmentioning

confidence: 99%

Eco‐friendly conductive polymer nanocomposites (CPC) for solar absorbers design

Antar

Feller

2013

Polymers for Advanced Techs

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International audienceTo reduce both the cost and the environmental impact of copper-based thermal solar absorbers, we have investigated their possible substitution by bio-based conductive polymer nanocomposite (CPC) elements. Our results show that carbon nanotubes (CNT) have no significant influence on polymers' calorimetric properties such as Tm and Tg but lead to a strong increase in crystallinity of poly(lactic acid) (PLA) and to a lesser extent of poly(amide 12) poly(amide 12) (PA12) for 2 and 3 CNT wt % respectively. Percolation thresholds as low as 0.5 and 0.58 were obtained for PA12 and PLA, respectively, and visco-elastic properties such as h*, G' and G" were found to increase exponentially with CNT content confirming the formation of a CNT network within the matrix. All CPC are absorbing more energy in the visible and infrared than in the ultraviolet wavelength ranges. Finally, the thermal conductivity k of PLA-CNT and PA12-CNT were increased, respectively, of 85% and 24%, to reach 0.28W.m 1.K 1 and 0.26W.m 1.K 1, for only 5wt% CNT. The figure of merit suggests that PA12 is the polymer which satisfies at best all criteria, particularly combining a lower viscosity at almost equivalent thermal conductivity and absorptivity

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Rheological properties of silica dispersions stabilized by stereoregular poly(methyl methacrylate)

Cited by 16 publications

References 27 publications

Effects of polyethylenimine on the dispersibility of hollow silica nanoparticles

Effects of polyethylenimine on the dispersibility of hollow silica nanoparticles

Wear of poly (methyl methacrylate) against a metallic surface in dry conditions

Eco‐friendly conductive polymer nanocomposites (CPC) for solar absorbers design

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