Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/15353
Title: Using Light Scattering to Screen Polyelectrolytes (PEL) Performance in Flocculation
Authors: Rasteiro, Maria G. 
Pinheiro, Ineide 
Garcia, Fernando A. P. 
Ferreira, Paulo 
Hunkeler, David 
Keywords: Light diffraction spectroscopy (LDS); Fractal dimension; Polyacrilamides
Issue Date: 27-May-2011
Publisher: MDPI
Citation: RASTEIRO, Maria G. [et al.] - Using Light Scattering to Screen Polyelectrolytes (PEL) Performance in Flocculation. "Polymers". ISSN 2073-4360. Vol. 3, nº 2 (2011) p. 915-927
Serial title, monograph or event: Polymers
Volume: 3
Issue: 2
Abstract: Flocculation of precipitated calcium carbonate (PCC) was monitored using light diffraction spectroscopy (LDS). Four cationic polyacrylamides of high molar mass and with different degrees of branching, all copolymers of acrylamide (AM) and acryloyloxyethyltrimethyl ammonium chloride (Q9), were tested. LDS supplied information about the kinetic curves for flocs growth and also for the flocs structure evolution. Flocculation kinetics, flocs size and structure, flocs resistance and reflocculation capacity could be correlated with the degree of branching of the polyelectrolytes (PEL). Furthermore, PEL with different degrees of branching corresponded to different values for the intrinsic viscosity, indicating differences in the polymer conformation, which explained well the performance differences in flocculation.
URI: http://hdl.handle.net/10316/15353
ISSN: 2073-4360
DOI: 10.3390/polym3020915
Rights: openAccess
Appears in Collections:FCTUC Eng.Química - Artigos em Revistas Internacionais

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