Surface chemistry and rheological properties of zirconia suspensions

1991 ◽  
Vol 35 (1) ◽  
pp. 149-165 ◽  
Author(s):  
Yee‐Kwong Leong ◽  
David V. Boger ◽  
David Parris
Keyword(s):  
Surface Chemistry ◽  
Rheological Properties

Tuning the structure, thermal stability and rheological properties of liquid crystal phases via the addition of silica nanoparticles

2019 ◽  
Vol 21 (46) ◽  
pp. 25649-25657 ◽  
Author(s):  
Joshua B. Marlow ◽  
Thomas M. McCoy ◽  
Cat Q. Ho ◽  
Liliana de Campo ◽  
Robert Knott ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Liquid Crystal ◽  
Light Microscopy ◽  
Surface Chemistry ◽  
Silica Nanoparticles ◽  
Rheological Properties ◽  
Small Angle ◽  
Angle Scattering ◽  
Liquid Crystal System ◽  
Crystal Phases

The effects of adding silica nanoparticles of varying size and surface chemistry to a liquid crystal system were analysed using small-angle scattering and polarising light microscopy, with varying temperature and applied shear.

Impact of particle surface chemistry on the structure and rheological properties of graphene-based particle/polydimethylsiloxane composites

RSC Advances ◽  
2015 ◽  
Vol 5 (44) ◽  
pp. 34885-34893 ◽  
Author(s):  
Ran Niu ◽  
Jiang Gong ◽  
Donghua Xu ◽  
Tao Tang ◽  
Zhao-Yan Sun
Keyword(s):  
Surface Chemistry ◽  
Rheological Properties ◽  
Particle Surface ◽  
Particle Interaction

The inter-particle interaction of graphene-based particles has a key effect on the structure and rheological properties of graphene-based particle/polydimethylsiloxane composites.

Effect of Surface Chemistry and Structure of Sludge Particles on Their Co-slurrying Ability with Petroleum Coke

2014 ◽  
Vol 12 (1) ◽  
pp. 429-439 ◽  
Author(s):  
Meng Liu ◽  
Yufeng Duan ◽  
Xiuyuan Ma
Keyword(s):  
Surface Chemistry ◽  
Rheological Properties ◽  
Petroleum Coke ◽  
Shear Thickening ◽  
Shear Thinning ◽  
Static Stability ◽  
Mineral Salts ◽  
Carbon Modification ◽  
Mineral Components ◽  
Surface Chemistry And Structure

Abstract Gasification and combustion performance of petroleum coke–water slurry (PCWS) can be enhanced by the addition of sludge. In this study, we have mixed three types of sludge with petroleum coke to form petroleum coke–sludge slurry (PCSS) and analyzed the effects of surface chemistry and structure of the sludge samples on the rheological properties of PCSS. Results show that the surface of petroleum coke particles is strongly hydrophobic, while the surface of sludge particles is hydrophilic. The sludge particles primarily consist of oxide and mineral salts, while petroleum coke particles mainly consist of organic carbon. Modification of the sludge changes the distribution of mineral components on the surface of sludge. In addition, the surface area, pore structure, and size of sludge tend to increase after modification. Sludge shows strong shear-thinning behavior, while the rheological properties of PCWS change from shear-thickening to shear-thinning behavior with excessive addition of sludge more than 6 wt.%. The suitable mass concentration for industrial application of PCSS is determined to be 62–64 wt.% for the sludge addition of 10–15 wt.%. Increasing the amount of sludge may enhance the yield stress and improve the static stability of PCSS, and sludge might be the most effective stabilizer used in PCWS.

Rheological properties of polyurethane adhesives containing silica as filler: influence of the nature and surface chemistry of silica

2001 ◽  
Vol 169 (1) ◽  
pp. 191-196 ◽  
Author(s):  
Ana M. Torr�-Palau ◽  
Juan C. Fern�ndez-Garc�a ◽  
A. C�sar Orgil�s-Barcel� ◽  
Teresa del Pilar Ferr�ndiz-G�mez ◽  
Jos� Miguel Mart�n-Mart�nez
Keyword(s):  
Surface Chemistry ◽  
Rheological Properties ◽  
Polyurethane Adhesives

Clay minerals in drilling fluids: functions and challenges

Clay Minerals ◽  
2020 ◽  
Vol 55 (1) ◽  
pp. 1-11
Author(s):  
Jun Rui Zhang ◽  
Meng Dan Xu ◽  
Georgios E. Christidis ◽  
Chun Hui Zhou
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Surface Chemistry ◽  
Rheological Properties ◽  
Clay Minerals ◽  
Specific Structure ◽  
Drilling Fluids ◽  
Future Directions ◽  
Water Based ◽  
Slurry Walls

AbstractThe addition of clay minerals in drilling fluids modifies the dispersion's viscosity. In this article, scientific advances related to the use of clays and clay minerals (bentonite, palygorskite, sepiolite and mixtures of clay minerals) in drilling fluids are summarized and discussed based on their specific structure, rheological properties, applications, prevailing challenges and future directions. The rheological properties of drilling fluids are affected by the temperature, type of electrolytes, pH and concentration of clay minerals. Bentonites are smectite-rich clays often used in drilling fluids, and their composition varies from deposit to deposit. Such variations significantly affect the behaviour of bentonite-based drilling fluids. Palygorskite is suitable for use in oil-based drilling fluids, but the gelation and gel structures of palygorskite-added drilling fluids have not received much attention. Sepiolite is often used in water-based drilling fluids as a rheological additive. Dispersions containing mixtures of clays including bentonite, kaolin, palygorskite and sepiolite are used in drilling fluids requiring specific features such as high-density drilling fluids or those used in impermeable slurry walls. In these cases, the surface chemistry–microstructure–property relationships of mixed-clay dispersions need to be understood fully. The prevailing challenges and future directions in drilling fluids research include safety, ‘green’ processes and high-temperature and high-pressure-resistant clay minerals.

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