caa a22 4500 378903128 CHVBK 20180305123523.0 cr unu---uuuuu 161128e20041201xx s 000 0 eng 10.1515/epoly.2004.4.1.673 doi (NATIONALLICENCE)gruyter-10.1515/epoly.2004.4.1.673 Magnetic hydrogel beads based on chitosan [Elektronische Daten] [Dilyana Paneva, Olya Stoilova, Nevena Manolova, Iliya Rashkov] A novel effective route for incorporating magnetic material in chitosan beads by capillary extrusion is proposed. Magnetic material (Fe3O4) with particle size 2 μm and 10 nm was used. The weight ratio chitosan : Fe3O4 was varied in the range from 4:1 to 1:1. The obtained magnetic beads were modified by physical crosslinking with CuSO4, chemical crosslinking with epichlorohydrin, or were coated with a polyelectrolyte complex chitosan/poly(2-acryloylamido-2-methylpropanesulfonic acid). The morphology and the magnetic properties of the beads were studied by optical and scanning electron microscopy, and magnetometry. The magnetisation values of the beads increased on increasing the proportion of Fe3O4. A magnetic field intensity of 6 kOe was completely enough to reach orientation of all dipole moments of the incorporated Fe3O4. The magnetic beads completely sorbed a model dye - reactive red - from its aqueous solution, thus implying that such materials might be used for wastewater treatment in textile industry. © 2013 by Walter de Gruyter GmbH & Co. Paneva Dilyana Laboratory of Bioactive Polymers, Institute of Polymers, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bl. 103 A, Sofia 1113, Bulgaria; Fax +359 (0)2 870 75 23 aut Stoilova Olya Laboratory of Bioactive Polymers, Institute of Polymers, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bl. 103 A, Sofia 1113, Bulgaria; Fax +359 (0)2 870 75 23 aut Manolova Nevena Laboratory of Bioactive Polymers, Institute of Polymers, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bl. 103 A, Sofia 1113, Bulgaria; Fax +359 (0)2 870 75 23 aut Rashkov Iliya Laboratory of Bioactive Polymers, Institute of Polymers, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bl. 103 A, Sofia 1113, Bulgaria; Fax +359 (0)2 870 75 23 aut e-Polymers De Gruyter 4/1(2004-12-01), 673-683 2197-4586 4:1<673 2004 4 epoly https://doi.org/10.1515/epoly.2004.4.1.673 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1515/epoly.2004.4.1.673 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Paneva Dilyana Laboratory of Bioactive Polymers, Institute of Polymers, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bl. 103 A, Sofia 1113, Bulgaria; Fax +359 (0)2 870 75 23 aut NATIONALLICENCE 700 1- Stoilova Olya Laboratory of Bioactive Polymers, Institute of Polymers, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bl. 103 A, Sofia 1113, Bulgaria; Fax +359 (0)2 870 75 23 aut NATIONALLICENCE 700 1- Manolova Nevena Laboratory of Bioactive Polymers, Institute of Polymers, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bl. 103 A, Sofia 1113, Bulgaria; Fax +359 (0)2 870 75 23 aut NATIONALLICENCE 700 1- Rashkov Iliya Laboratory of Bioactive Polymers, Institute of Polymers, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bl. 103 A, Sofia 1113, Bulgaria; Fax +359 (0)2 870 75 23 aut NATIONALLICENCE 773 0- e-Polymers De Gruyter 4/1(2004-12-01), 673-683 2197-4586 4:1<673 2004 4 epoly CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter