Dispersion Stabilization of Titania Nanoparticles for Textile: Aggregation Behavior and Self-Cleaning Activity

Goyal, Nidhi; Rastogi, Deepali; Jassal, Manjeet; Agrawal, Ashwini K.

doi:10.1080/01932691.2012.685842

Cited by 13 publications

(6 citation statements)

References 21 publications

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“…Titanium dioxide (TiO 2 ) has been widely used for photocatalytic coating, , cosmetic, antibacterial, self-cleaning, and biological purposes. Furthermore, TiO 2 ’s smaller particle size has a specific surface area effect, resulting in outstanding light absorption, catalytic, and magnetic qualities.…”

Section: Introductionmentioning

confidence: 99%

Study on Dispersion of TiO₂ Nanopowder in Aqueous Solution via Near Supercritical Fluids

Kao

Cheng

2020

ACS Omega

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In this study, we investigated the effects of near supercritical carbon dioxide (SCCO2) parameters, including pressure, temperature, and saturation time on titanium dioxide (TiO2) nanopowder dispersion in water-containing sodium hexametaphosphate (SHMP). The stability and morphology of TiO2 particles dispersed in an aqueous solution were examined using a zeta potential instrument, dynamic light scattering, and transmission electron microscopy. As shown in the results, of particular interest, it was found that near SCCO2’s pressure and saturation time had the strongest impact on TiO2 dispersion in water-containing SHMP. This finding indicated that TiO2’s secondary average particle size was significantly reduced with an increase in near SCCO2’s pressure and saturation time. Additionally, in the presence of SHMP, the zeta potential of the as-prepared dispersion solution reached −53.7 mV because of production of the larger negative static charge repulsion force (resulting from SHMP dissociation) on the TiO2 particle surface. The secondary average size was 127 ± 68 nm, indicating good stability of TiO2 dispersed in water containing an inorganic dispersant.

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Section: Introductionmentioning

confidence: 99%

Study on Dispersion of TiO₂ Nanopowder in Aqueous Solution via Near Supercritical Fluids

Kao

Cheng

2020

ACS Omega

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“…18−22 Adsorption properties have been also utilized to construct hybrid materials containing titanium(IV) compounds and polyelectrolytes 23,24 as well as to control aggregation in aqueous dispersions of barium titanates, 25,26 lead zirconate titanates, 27 titanate nanotubes, 28 and titania nanoparticles. 29 Among the polyelectrolytes, poly(diallyldimethylammonium) chloride (PDADMAC) has been applied for surface treatment or as coagulating agent in various systems and coating agent to create biofunctionalized nanoparticles for therapeutic applications. 30 Accordingly, careful investigations performed with surface sensitive techniques such as reflectometry, ellipsometry, and atomic force microscopy as well as theoretical predictions revealed that PDADMAC adsorbs strongly on an oppositely charged surface, but the adsorption rate and amount greatly depend on the experimental conditions (e.g., concentration of the polyelectrolyte, ionic strength, and pH).…”

Section: ■ Introductionmentioning

confidence: 99%

“…It is well-known that charged polymers or so-called polyelectrolytes adsorb strongly on oppositely charged surfaces, − and they have been widely used to adjust aggregation processes in dispersions of charged particles. − Adsorption properties have been also utilized to construct hybrid materials containing titanium(IV) compounds and polyelectrolytes , as well as to control aggregation in aqueous dispersions of barium titanates, , lead zirconate titanates, titanate nanotubes, and titania nanoparticles . Among the polyelectrolytes, poly(diallyldimethylammonium) chloride (PDADMAC) has been applied for surface treatment or as coagulating agent in various systems and coating agent to create biofunctionalized nanoparticles for therapeutic applications .…”

Section: Introductionmentioning

confidence: 99%

Tuning the Aggregation of Titanate Nanowires in Aqueous Dispersions

et al. 2015

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Electrophoretic and dynamic light scattering (DLS) measurements revealed that aggregation in aqueous dispersion of titanate nanowires (TiONWs) can be tuned by poly(diallyldimethylammonium) chloride (PDADMAC) polyelectrolyte. The nanowires possessed negative charge under alkaline conditions which was compensated by the oppositely charged PDADMAC adsorbed on the surface. Such adsorption led to charge neutralization and subsequent charge reversal at the appropriate polyelectrolyte doses. The dispersions were stable at low PDADMAC concentration where the TiONWs possessed negative charge. However, fast aggregation of the nanowires occurred close to the charge neutralization point where the overall charge of the particles was zero. Charge inversion at high polyelectrolyte doses gave rise to restabilization of the samples and slow aggregation of the TiONWs even at higher ionic strengths where the original bare TiONW dispersions were unstable. The colloid stability of the bare nanowires can be explained well qualitatively by the Derjaguin, Landau, Verwey, and Overbeek (DLVO) theory; however, polyelectrolyte adsorption led to additional patch-charge attractions and osmotic repulsion between the particles. On the basis of the knowledge generated by the present work, experimental conditions (e.g., salt level, polyelectrolyte, and particle concentrations) can be adjusted in order to design stable and processable aqueous dispersions of TiONWs for further applications.

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“…Titania nanoparticles were stabilized with the addition of PAA and titania-treated cotton fabric materials were prepared and investigated by light scattering, electron microscopy and in self-cleaning experiments [84]. The particles were negatively charged in a wide range of pH and no clear PZC was observed even at low pH, once PAA was present in the systems.…”

Section: Effect Of Like-charged Polyelectrolytes On the Stability Of mentioning

confidence: 99%

“…Titanium oxide surfaces were modified by polymeric species either to tune their charging and aggregation behaviour or to functionalize them to prepare hybrid materials [30,[80][81][82] or to enhance the adsorption capacity of the particles [26,83,84]. It was shown that polymer coating improves the cellular uptake of the particles in biomedical applications [6].…”

Section: General Remarksmentioning

confidence: 99%

Effect of Ionic Compounds of Different Valences on the Stability of Titanium Oxide Colloids

Muráth

Sáringer

Somosi

et al. 2018

Colloids and Interfaces

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Titanium oxide particles of various morphologies have been prepared for applications of scientific or industrial interest in recent decades. Besides development of novel synthetic routes and solid-state characterization of the obtained particles, colloidal stability of titanium oxide dispersions was the focus of numerous research groups due to the high importance of this topic in applications in heterogeneous systems. The influence of dissolved ionic compounds, including monovalent salts, multivalent ions and polyelectrolytes, on the charging and aggregation behaviour of titanium oxide materials of spherical and elongated structures will be discussed in the present review.

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Dispersion Stabilization of Titania Nanoparticles for Textile: Aggregation Behavior and Self-Cleaning Activity

Cited by 13 publications

References 21 publications

Study on Dispersion of TiO₂ Nanopowder in Aqueous Solution via Near Supercritical Fluids

Study on Dispersion of TiO₂ Nanopowder in Aqueous Solution via Near Supercritical Fluids

Tuning the Aggregation of Titanate Nanowires in Aqueous Dispersions

Effect of Ionic Compounds of Different Valences on the Stability of Titanium Oxide Colloids

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Dispersion Stabilization of Titania Nanoparticles for Textile: Aggregation Behavior and Self-Cleaning Activity

Cited by 13 publications

References 21 publications

Study on Dispersion of TiO2 Nanopowder in Aqueous Solution via Near Supercritical Fluids

Study on Dispersion of TiO2 Nanopowder in Aqueous Solution via Near Supercritical Fluids

Tuning the Aggregation of Titanate Nanowires in Aqueous Dispersions

Effect of Ionic Compounds of Different Valences on the Stability of Titanium Oxide Colloids

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Study on Dispersion of TiO₂ Nanopowder in Aqueous Solution via Near Supercritical Fluids

Study on Dispersion of TiO₂ Nanopowder in Aqueous Solution via Near Supercritical Fluids