Influence of the matrix and polymerization methods on the synthesis of BC/PANi nanocomposites: an IGC study
authors Alonso, E; Faria, M; Ferreira, A; Cordeiro, N
nationality International
author keywords Bacterial cellulose; Polyaniline; Nanocomposites; Inverse gas chromatography
abstract Inverse gas chromatography (IGC) is a technique for evaluating surface properties. The current work emphasizes the use of IGC to evaluate the surface physicochemical changes during different bacterial cellulose (BC) processing methods as well as upon polyaniline (PANi) incorporation. The processing methods (oven-drying, freeze-drying, and regeneration) caused changes in the BC surface group distribution, where upon freeze-drying and regeneration, a more acidic behavior is obtained, compared to oven-drying (K (b)/K (a) decreased up to 24%). Through freeze-drying, the structural pore preservation increases (54%) the BC porosity, whereas through regeneration, the porosity decreases (23%), compared to BC oven-drying. Regarding the nanocomposites, with PANi incorporation, the overall properties evaluated by IGC were significantly changed. The increases up to 150%, indicating a more reactive surface in the nanocomposites. Also, is observed a sevenfold increase in the K (b)/K (a) and a less porous surface (up to 85%). Hence, the current work highlights the use of IGC as a viable technique to evaluate the physicochemical changes upon different BC modifications.
publisher SPRINGER
issn 0969-0239
year published 2018
volume 25
issue 4
beginning page 2343
ending page 2354
digital object identifier (doi) 10.1007/s10570-018-1736-0
web of science category Materials Science, Paper & Wood; Materials Science, Textiles; Polymer Science
subject category Materials Science; Polymer Science
unique article identifier WOS:000428925300014
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