In this study, we investigate the shear viscoelasticity of xanthan and hydrophobically modified xanthans at silicone oil/water interface. Xanthan is well known to adopt two distinct conformations in water solution, a rigid conformation at low temperature and a flexible one at high temperature. Hence, we first studied the un-modified xanthan as a function of temperature and showed that its interfacial viscoelasticity depends on the xanthan conformation as in bulk but evolves the opposite way after heating: i.e., the bulk viscoelasticity is weakened after thermal treatment while interfacial viscoelasticity is reinforced. Ergo, we proved that for xanthan, bulk and interfacial viscoelastic properties act independently. Then, we investigated the effect of hydrophobic modification of xanthan on its interfacial properties. We demonstrated that, before any thermal treatment, the more grafted the polymer, the higher the interfacial elasticity confirming the potential stabilizing properties of such modified polysaccharides. The interfacial properties of modified xanthans are also improved after thermal treatment but the improvement is much less pronounced for grafting densities above 8% which is explained by different chains organization at the interface.
Food Hydrocolloids – Elsevier
Published: Dec 1, 2016
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera