Filler size effect in an attractive fibrillated network
In this study we investigated the effect of the silica size (filler) on the mechanical and structural properties of an attractive fibrillated network composed by cellulose nanofibrils (CNF). Oscillatory rheology has been successfully employed to deconvolute mechanical properties arising from both network and filler as well as reconstruct structural information of the gel. Our rheological findings let us hypothesis that the presence of the smaller filler into the CNF network leave the network unaltered, whilst, the larger filler being able to strongly affect the structural properties of the network. These results were associated to the filler-to-mesh size ratio being < 1 and > 1 for the small and the large filler, respectively. Since reconstruction of structural information from rheological measurements is indirect, we would like to test our hypothesis using SANS, where the filler could be matched out (60 vol% D2O), whilst the CNF network still detectable (47 vol% D2O contract match point). Therefore we propose to measure the following samples in 60 wt% D2O. i) 1 wt% CNF ii) 1 wt% CNF + 1 wt% and 2.5wt% of small and large filler iii) 60% D2O background. For a total of 6 samples.
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Vincenzo Calabrese and PORCAR Lionel. (2019). Filler size effect in an attractive fibrillated network. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.EASY-477
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