Photos of the open siphon experiment using a 0.5 wt% 8 million g/mol PEO solution laden with 2 wt% 45 – 60 nm silica particles

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(a)                                                                         (b)

                  

(c)                                                                     (d)

Photos of the open siphon experiment using a 0.5 wt% 8 million g/mol PEO solution laden with 2 wt% 45 – 60 nm silica particles. The suspension is almost cleaned up by the siphon. Elapsed time: (a) 1.5 s; (b) 3.0 s; (c) 6.0 s; (d) 14.5 s.