caa a22 4500 475764846 CHVBK 20180406123602.0 cr unu---uuuuu 170329e20000501xx s 000 0 eng 10.1007/s003960050538 doi (NATIONALLICENCE)springer-10.1007/s003960050538 Disruption of polystyrene latex aggregates in capillary flow [Elektronische Daten] [S. Tang, C. M. McFarlane, Z. Zhang]  Disruption of polystyrene latex aggregates, formed in 1 M citric acid/phosphate buffer solution at pH 3.8 through diffusion-limited colloid aggregation (DLCA) and in 0.2 M NaCl solution at pH 5.5 through reaction-limited colloid aggregation (RLCA), was studied with respect to aggregate size and fractal nature. This was achieved using small-angle laser scattering in conjunction with a specially designed sampling method, which brought about the elimination of the disruption of the aggregates caused by a commercial stirrer sample unit. Aggregations were carried out in a mixture of deuterium oxide and water instead of water alone as a solvent to minimise sedimentation resulting from the differences in density between the latex particles and the electrolytes. An initial "steady state” in terms of aggregate size and fractal dimension was found to occur after around 20 min and 2 days for DLCA and RLCA aggregates, respectively, at 25 °C. No aggregate disruption was detected for DLCA and RLCA aggregates after their passing through a capillary tube for shear rates up to 1584 and 2694 s−1, respectively. At higher shear rates, significant decreases in the aggregate volume-mean diameter, D[4, 3], occurred after shearing. The degree of reduction in D[4, 3] was larger for DLCA aggregates in comparison to RLCA aggregates. The results would suggest that DLCA aggregates were more subject to disruption during shearing. A high degree of disruption was observed in turbulent flow for both aggregates. Springer-Verlag Berlin Heidelberg, 2000 Key words Disruption nationallicence Aggregates nationallicence Size nationallicence Fractal dimension nationallicence Capillary flow nationallicence Tang S. Department of Chemical Engineering and Chemical Technology Imperial College, London SW7 2BY, UK e-mail: s.tang@ic.ac.uk, GB aut McFarlane C. M. School of Chemical Engineering University of Birmingham Birmingham B15 2TT, UK, GB aut Zhang Z. School of Chemical Engineering University of Birmingham Birmingham B15 2TT, UK, GB aut https://doi.org/10.1007/s003960050538 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s003960050538 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Tang S. Department of Chemical Engineering and Chemical Technology Imperial College, London SW7 2BY, UK e-mail: s.tang@ic.ac.uk, GB aut NATIONALLICENCE 700 1- McFarlane C. M. School of Chemical Engineering University of Birmingham Birmingham B15 2TT, UK, GB aut NATIONALLICENCE 700 1- Zhang Z. School of Chemical Engineering University of Birmingham Birmingham B15 2TT, UK, GB aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer