Colloids and Surfaces A 538 (2018) 481–487 Contents lists available at ScienceDirect Colloids and Surfaces A journal homepage: www.elsevier.com/locate/colsurfa Research Paper Eﬀect of aﬃnity on the structure formation in highly size asymmetric bimodal suspensions Yoon Se Jung, Joo Young Lee, Kyung Hyun Ahn , Seung Jong Lee School of Chemical and Biological Engineering, Institute of Chemical Process, Seoul National University, Seoul, 151-744, Republic of Korea GR APHICAL A BSTRACT ARTICLE I NFO ABSTRACT Keywords: We investigate the inﬂuence of inter-particle aﬃnity on the microstructure and rheological behavior in the Bimodal suspension bimodal suspension systems. For this purpose, we design the suspensions using two kinds of polystyrene beads Colloidal gel (PS, size ∼530 nm) as a large particle which are electrostatically stabilized and are diﬀerent in surface prop- Aﬃnity erties only, while keeping unstable alumina coated silica (Al-silica, size ∼12 nm) as a small particle. To change Particulate ﬂuid the aﬃnity, hydrogen bonding is induced by modifying surface of PS as poly (vinyl pyrrolidone) (PVP). The Rheology inﬂuence of aﬃnity between large and small particles is investigated by observing the changes in rheological Sol-gel phase transition properties and microstructure. Even with the same, the formation of Al-silica cluster which connects
Colloids and Surfaces A: Physicochemical and Engineering Aspects – Elsevier
Published: Feb 5, 2018
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