AI Article Synopsis
- The study investigated how solution conditions and the structure of polysaccharides affect their Layer-by-Layer (LbL) deposition on nanofibrillated cellulose (NFC).
- The research used QCM-D and CPM techniques to observe the multilayer build-up of cellulose derivatives and chitosan, revealing that the type of cationic polysaccharide significantly impacts the interactions and layering process.
- It was found that while ionic strength and pH influenced cellulose layer properties like swelling, the build-up of chitosan did not depend much on ionic strength, suggesting that interactions beyond just electrostatics are crucial for polysaccharide multilayer formation.
Article Abstract
The aim of this work was to study the effect of solution conditions and polysaccharide structure on their Layer-by-Layer (LbL) deposition on nanofibrillated cellulose (NFC). Multilayer build-up of cellulose derivatives and chitosan on NFC model surfaces was studied using Quartz Crystal Microbalance with Dissipation (QCM-D) and Colloidal Probe Microscopy (CPM). The type of cationic polysaccharide was found to significantly affect the multilayer build-up and surface interactions. Cationic cellulose derivative quaternized hydroxyethyl cellulose ethoxylate (HECE) formed highly water-swollen layers with carboxymethyl cellulose (CMC), and the build-up was markedly influenced by both the ionic strength and pH. The ionic strength did not significantly influence the multilayer build-up of chitosan-CMC system, and adsorbed chitosan layers decreased the viscoelasticity of the system. Based on the results, it was also confirmed that electrostatic interaction is not the only driving force in case of the build-up of polysaccharide multilayers on nanofibrillated cellulose.
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| http://dx.doi.org/10.1016/j.carbpol.2014.02.061 | DOI Listing |
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