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Functionalization of cellulosic model substrates via laccase-mediated coupling of non-polar particles

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Cusola, Oriol. Functionalization of cellulosic model substrates via lacasse mediated coupling of non polar particles.pdf (132,7Kb) (Restricted access)   Request copy 

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Cusola Aumedes, OriolMés informacióMés informacióMés informació
Valls Vidal, CristinaMés informacióMés informacióMés informació
Vidal Lluciá, TeresaMés informacióMés informacióMés informació
Roncero Vivero, María BlancaMés informacióMés informacióMés informació
Rojas, Orlando J.
Document typeConference report
Defense date2014
Rights accessRestricted access - publisher's policy
All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder
Abstract
In the present work we investigate the physicochemical interactions between silica and nanofibrillar cellulose (CNF) with a multi component system (MCS) obtained from an enzymatic reaction of a laccase enzyme and a short-chain organic molecule, dodecyl 3,4,5-trihydroxybenzoate (commonly known as lauryl gallate, LG) as well as sulphonated lignin (SL). Hydrophobic chains of enzyme-modified LG were coupled onto CNF and silica surfaces by direct adsorption of the MCS. Quartz crystal microgravimetry (QCM-D), Atomic Force Microscopy (AFM) and water contact angle (WCA) were used to monitor in situ and characterize the hydrophobization process. Efficient adsorption of the MCS onto CNF and silica surfaces increased their WCA by 88° and 78°, respectively. Dynamic Light Scattering (DLS) measurements revealed an effect of the enzyme on LG: reducing particle size from several microns down to 300 nm. The laccase (Lacc) treatment in the presence of SL reduced even more the LG particle size to 80 nm through a dispersive effect of SL
CitationCusola, O. [et al.]. Functionalization of cellulosic model substrates via laccase-mediated coupling of non-polar particles. A: European Workshop on Lignocellulosics and Pulp. "Proceedings of the 13th European workshop on Lignocellulosics and pulp". Sevilla: 2014, p. 119-122. 
URIhttp://hdl.handle.net/2117/23454
ISBN978-84-616-9842-4
Publisher versionhttp://www.irnas.csic.es/users/delrio/Proceedings-13thEWLP.pdf
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