Enzyme-assisted modification of cellulose/chitin fibers with NIPAAm

Authors : ANAMARIA IRIMIA, EMILIA CSISZAR, MARIUS DOBROMIR, FLORICA DOROFTEI, CORNELIA VASILE

Pages : 1089-1101

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Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Coating processes are applied in order to improve coating adhesion and resistance to degradation. Covalently bound organic coatings rather than merely physically bound ones assure stable modification. In this study a novel two-step process was developed to modify cellulose/chitin mix fibers consisting of enzymatic activation with a commercial cellulase, followed by a coupling reaction with N-isopropylacrylamide insert ignore into journalissuearticles values(or poly insert ignore into journalissuearticles values(N-isopropylacrylamide);); in the presence of 1-insert ignore into journalissuearticles values(3-dimethylaminopropyl);-3-ethylcarbodiimide insert ignore into journalissuearticles values(EDC); and N-hydroxysuccinimide insert ignore into journalissuearticles values(NHS);. Both enzyme-activated and subsequently modified samples were characterized by ATR-FTIR, XPS, and SEM. All obtained results confirm the structural and morphological changes of the fiber surface after the application of the two-step procedure. The particular responsiveness to temperature and to pH of the coated fibers was evidenced by following the swelling behavior. It was established that the swelling kinetics followed a Fickian behavior.
Keywords : Fibers, responsive, cellulose, chitin, enzymes