The rheology of polyvinylpyrrolidone-coated silica nanoparticles positioned at an air-aqueous interface

Yu, Kai1; Zhang, Huagui1; Biggs, Simon2; Xu, Zhenghe3,4; Cayre, Olivier J.1; Harbottle, David1

2018-10

10.1016/j.jcis.2018.05.035

JOURNAL OF COLLOID AND INTERFACE SCIENCE   影响因子和分区

0021-9797

1095-7103

Particle-stabilized emulsions and foams are widely encountered, as such there remains a concerted effort to better understand the relationship between the particle network structure surrounding droplets and bubbles, and the rheology of the particle-stabilized interface. Poly(vinylpyrrolidone)-coated silica nanopartides were used to stabilize foams. The shear rheology of planar particle-laden interfaces were measured using an interfacial shear rheometer and the rheological properties measured as a function of the sub phase electrolyte concentration and surface pressure. All particle-laden interfaces exhibited a liquid-like to solid-like transition with increasing surface pressure. The surface pressure-dependent interfacial rheology was then correlated to the formed micron-scale structures of the particle-laden interfaces which were imaged using a Brewster angle microscope. With the baseline knowledge established, foams were prepared using the same composite particles and the particle network structure imaged using cryo-SEM. An attempt has been made to correlate the two structures observed at a planar interface and that surrounding a bubble to elucidate the likely rheology of the bubble stabilizing particle network. Independent of the sub-phase electrolyte concentration, the resulting rheology of the bubble stabilizing particle network was strongly elastic and appeared to be in a compression state at the region of the L-S phase transition. (C) 2018 Elsevier Inc. All rights reserved.

Particle-stabilized foams Interfacial shear rheology Polymer-coated particles

SCI ; EI

英语

其他

China Scholarship Council[201406450027]

Chemistry

Chemistry, Physical

WOS:000436528300037

ACADEMIC PRESS INC ELSEVIER SCIENCE

20182105235783

Coating techniques ; Elasticity ; Electrolytes ; Foams ; Shear flow ; Silica nanoparticles

Fluid Flow, General:631.1 ; Electric Batteries and Fuel Cells:702 ; Physical Chemistry:801.4 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Coating Techniques:813.1

CHEMISTRY

Web of Science

1.Univ Leeds, Sch Chem & Proc Engn, Leeds, W Yorkshire, England
2.Univ Queensland, Sch Chem Engn, Brisbane, Qld, Australia
3.Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB, Canada
4.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen, Peoples R China

Yu, Kai,Zhang, Huagui,Biggs, Simon,et al. The rheology of polyvinylpyrrolidone-coated silica nanoparticles positioned at an air-aqueous interface[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2018,527:346-355.

Yu, Kai,Zhang, Huagui,Biggs, Simon,Xu, Zhenghe,Cayre, Olivier J.,&Harbottle, David.(2018).The rheology of polyvinylpyrrolidone-coated silica nanoparticles positioned at an air-aqueous interface.JOURNAL OF COLLOID AND INTERFACE SCIENCE,527,346-355.

Yu, Kai,et al."The rheology of polyvinylpyrrolidone-coated silica nanoparticles positioned at an air-aqueous interface".JOURNAL OF COLLOID AND INTERFACE SCIENCE 527(2018):346-355.