Surface Modification for Improving the Stability of Nanoparticles in                    Liquid Media

Iijima, Motoyuki; Kamiya, Hidehiro

doi:10.14356/kona.2009012

Cited by 124 publications

(64 citation statements)

References 74 publications

(80 reference statements)

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“…Such particles have a different tendency for adhesion and aggregation, thus it is necessary to control their aggregation/dispersion phenomena in order to use them in functional materials and final products. However, controlling the stability of suspension in organic media is still a challenging issue [26][27][28][29][30][31]. WEP is extensively used as thermal insulation, due to its moisture resistance, lifetime durability and flame retardancy.…”

Section: Introductionmentioning

confidence: 99%

Controlled anisotropic wetting behaviour of multi-scale slippery surface structure of non fluoro polymer composite

Sahoo¹,

Kandasubramanian²,

Sabarish³

2013

Express Polym. Lett.

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Abstract.A facile process for in-situ modification of surface properties of Waste Expanded Polystyrene (WEP)/graphite film produced by spin coating technique has been described. The additives undergo spontaneous surface agglomeration with formation of islands of forest of flake structure during the spinning process. This results in polymer films with enhanced roughness and highly hydrophobic surfaces. Wettability was analyzed using static water contact angle, surface morphology was observed using atomic force microscopy (AFM) and field emission scanning electron microscopy (FE-SEM). The polymer composite exhibited maximum water contact angle (WCA) of 129°. Surface texture reveals the variation of surface roughness which enables anisotropic surface wettability property. The present work exhibits promising approach for fabricating nano flake forest in polymer structures for various industrial applications.

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Section: Introductionmentioning

confidence: 99%

Controlled anisotropic wetting behaviour of multi-scale slippery surface structure of non fluoro polymer composite

Sahoo¹,

Kandasubramanian²,

Sabarish³

2013

Express Polym. Lett.

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“…These multifunctional nanocomposite materials provide extensive range of fascinating properties viz. catalytic activity 37 , optical activity [38][39] and environmental stability [40][41][42] . The improvement in performance of nanocomposite materials is attributed to the increased surface area and conductivity 43 .…”

Section: Nanocomposite Ion Exchangersmentioning

confidence: 99%

Developments in Synthesis, Characterization and Applications of Composite Ion-exchange Materials: A Review

Kaushal¹,

Mittal²,

Singh³

2017

Orient. J. Chem

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In this article, a review of hybrid inorganic-organic composite ion exchangers employed as ion sensors, photocatalysts, anti-microbial agents and in water remediation has been carried out. A detailed study of the synthetic procedures, characterization of various composite ion exchangers by different analytical techniques, ion exchange characteristics and their applications has been provided. The applications of the composite ion exchangers in the separation of metal ions, as ion selective electrodes, as photocatalysts in dye degradation and as antimicrobial agents have been reviewed extensively.

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“…To mitigate the degree of agglomeration, some physical methods, such as ultrasonic waves method [16], have been adopted, but efficiency of these methods only exists in pure water and not in cement pore solution containing high concentration of different ion species. Surface modification of NS has been studied and proven to be one of the most accepted methods to improve the dispersion stability of NS in complicated condition [17], while few attentions have been paid to it in the area of cement and concrete. The polymer on the surface could provide the steric hindrance for nanoparticles to generate significant repulsive force.…”

Section: Introductionmentioning

confidence: 99%

Modifying Cement Hydration with NS@PCE Core-Shell Nanoparticles

Ran²,

She

et al. 2017

Advances in Materials Science and Engineering

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It is generally accepted that fine particles could accelerate cement hydration process, or, more specifically, this accelerating effect can be attributed to additional surface area introduced by fine particles. In addition to this view, the surface state of fine particles is also an important factor, especially for nanoparticles. In the previous study, a series of nano-SiO 2 -polycarboxylate superplasticizer core-shell nanoparticles (NS@PCE) were synthesized, which have a similar particle size distribution but different surface properties. In this study, the impact of NS@PCE on cement hydration was investigated by heat flow calorimetry, mechanical property measurement, XRD, and SEM. Results show that, among a series of NS@PCE, NS@PCE-2 with a moderate shell-core ratio appeared to be more effective in accelerating cement hydration. As dosage increases, the efficiency of NS@PCE-2 would reach a plateau which is quantified by various characteristic values. Compressive strength results indicate that strength has a linear correlation with cumulative heat release. A hypothesis was proposed to explain the modification effect of NS@PCE, which highlights a balance between initial dispersion and pozzolanic reactivity. This paper provides a new understanding for the surface modification of supplementary cementitious materials and their application and also sheds a new light on nano-SiO 2 for optimizing cement-based materials.

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Surface Modification for Improving the Stability of Nanoparticles in Liquid Media

Cited by 124 publications

References 74 publications

Controlled anisotropic wetting behaviour of multi-scale slippery surface structure of non fluoro polymer composite

Controlled anisotropic wetting behaviour of multi-scale slippery surface structure of non fluoro polymer composite

Developments in Synthesis, Characterization and Applications of Composite Ion-exchange Materials: A Review

Modifying Cement Hydration with NS@PCE Core-Shell Nanoparticles

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