Min Q.Duan Y.-Y.Wang X.-D.Liang Z.-P.Lee D.-J.Su A.2019-05-142019-05-14201000219797https://scholars.lib.ntu.edu.tw/handle/123456789/408257Spreading non-Newtonian liquids with non-power-law rheology on completely wetting surfaces are seldom investigated. This study assessed the wetting behavior of polydimethylsiloxane (PDMS), a Newtonian fluid, two carboxymethylcellulose (CMC) sodium solutions, a PDMS+2%w/w silica nanoparticle suspension and three polyethylene glycol (PEG400)+5-10%w/w silica nanoparticle suspensions (non-power-law fluids) on a mica surface. The θ D -U and R-t data for spreading drops of the six tested, non-power-law fluids can be described by power-law wetting models. We propose that this behavior is attributable to a uniform shear rate (a few tens to a few hundreds of s -1 ) distributed over the thin-film regime that controls spreading dynamics. Estimated film thickness was below the resolution of an optical microscope for direct observation. Approximating a general non-Newtonian fluid spreading as a power-law fluid greatly simplifies theoretical analysis and data interpretation. ? 2010 Elsevier Inc.Contact angleNon-power-lawPower exponentSpreadingSpreading exponentjournal article10.1016/j.jcis.2010.04.0102-s2.0-77955673271https://www.scopus.com/inward/record.uri?eid=2-s2.0-77955673271&doi=10.1016%2fj.jcis.2010.04.010&partnerID=40&md5=2d2f8c396e14a186f66b3dd8b5cb70ef