Mercerization mediated modification of cellulosic fibers with NIPAAm and some compounds with antioxidant activity |
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| Authors: | Anamaria Irimia Emilia Csiszar Adina Coroab? Cristian-Drago? Varganici Cornelia Vasile |
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| Institution: | 1.Department of Physical Chemistry and Materials Science,Budapest University of Technology and Economics,Budapest,Hungary;2.Centre of Advanced Research in Bionanoconjugates and Biopolymers,“Petru Poni” Institut of Macromolecular Chemistry,La?i,Romania;3.Department of Physical Chemistry of Polymers,“Petru Poni” Institute of Macromolecular Chemistry,La?i,Romania |
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| Abstract: | A two step process was used for the modification of a cellulose/chitin mixed fibers: the first step was an alkali treatment with a NaOH solution (20 %), which was followed by the reaction with one of the reagents such as Nisopropylacrylamide, p-hydroxybenzoic acid, gallic acid, or eugenol. Both the samples activated with the alkali treatment and modified with chemicals were characterized by attenuated total reflectance Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy and thermal analysis. Results revealed the morphological and structural changes of the fiber surface after the surface grafting, which significantly altered the cellulose/chitin mixed fiber properties. Thermal analysis results showed an increase in the thermal stability of the treated samples. Antioxidant activity of cellulose/chitin mixed fibers modified with phenolic compounds showed that the efficiency depends on the chemical nature of phenolic compound. |
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