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
journal	CELLULOSE
author keywords	Bacterial cellulose; Polyaniline; Nanocomposites; Inverse gas chromatography
keywords	INVERSE GAS-CHROMATOGRAPHY; BACTERIAL CELLULOSE; COEFFICIENTS
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