Journal of Colloid and Interface Science 517 (2018) 1–8 Contents lists available at ScienceDirect Journal of Colloid and Interface Science journal homepage: www.elsevier.com/locate/jcis Regular Article The effects of polymer concentration, shear rate and temperature on the gelation time of aqueous Silica-Poly(ethylene-oxide) ‘‘Shake-gels” Harry Collini , Markus Mohr, Paul Luckham, Jiawen Shan, Andrew Russell Department of Chemical Engineering, Imperial College London, Prince Consort Road, London SW7 2BB, UK graphical a bstract article i nfo abstract Article history: Hypothesis: Aqueous mixtures of silica and Poly(ethylene-oxide) (PEO) are known as ‘‘Shake-gels” due to Received 2 October 2017 the formation of reversible gels when subject to an applied force, such as shaking. This shear-thickening Revised 24 January 2018 effect can be observed using a rheometer, via distinct and abrupt increases in the viscosity of the material. Accepted 25 January 2018 Preliminary experiments qualitatively showed that the time elapsed before this occurs, termed the gelation Available online 31 January 2018 time, varied depending on the conditions used. This paper reports on a systematic study into the effects of polymer concentration, shear rate and temperature on the gelation time, to quantify any relationships that Keywords: exist between the variables and develop understanding of the gelation
Journal of Colloid and Interface Science – Elsevier
Published: May 1, 2018
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