Scopul nostru este sprijinirea şi promovarea cercetării ştiinţifice şi facilitarea comunicării între cercetătorii români din întreaga lume.
Autori: M.-C. Popescu, M. Totolin, C. M. Tibirna, A. Sdrobis, T. Stevanovic, C. Vasile
Editorial: Int J. Biol Macromol. , 48(2), p. 326-335, 2011.
Cold plasma treatment is used to modify the cellulosic fibers for a variety of applications. The grafting of softwood unbleached (UBP) and bleached (BP) Kraft pulp fibers has been performed under the action of cold plasma discharges, using different kinds of fatty acids. The grafted samples are characterized by FTIR spectroscopy, X-Ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), differential scanning calorimetry (DSC), termogravimetry (TG-DTG) and X-ray diffraction (XRD). All these methods confirm the morphological and structural changes after plasma treatment which determines the modification in cellulosic fibers properties. The active centers created within the cellulose chains by plasma treatment were used to initiate grafting reactions with fatty acids. Such modification is useful to enhance the fibres properties such as softness and to change hydrophilic/hydrophobic balance.
Cuvinte cheie: cold plasma treatments, fatty acids, kraft pulp fibers