Gel and glass transition in fragile colloidal clays

被引：1
|
作者：
Angelini, R. [1 ,2 ]
Ruocco, G. [2 ,3 ]
Ruzicka, B. [1 ,2 ]
机构：
[1] ISC CNR, I-00185 Rome, Italy
[2] Sapienza Univ Roma, Dipartimento Fis, I-00185 Rome, Italy
[3] Ist Italiano Tecnol, IIT Sapienza, Ctr Life Nano Sci, Viale Regina Elena 291, I-00161 Rome, Italy
来源：
CONDENSED MATTER PHYSICS | 2019年 / 22卷 / 04期
关键词：
glass transition; colloids; Laponite (R); gels; fragility; AGING DYNAMICS; SUPERCOOLED LIQUIDS; PHASE-BEHAVIOR; POLYMER; AGGREGATION; SUSPENSIONS; RELAXATIONS; GELATION; DIAGRAM;
D O I：
10.5488/CMP.22.43607
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Dynamic Light Scattering (DLS) measurements were performed on colloidal suspensions of Laponite (R) at different concentrations in the range C-w = (1.5+3.0)%. The slowing down of the dynamics induced by aging was monitored by following the temporal evolution of autocorrelation functions at different concentrations towards the gel and glass transition. Exploiting analogies with supercooled liquids approaching their glass transitions, an Angell plot for the structural relaxation times was drawn. Finally, the fragility of Laponite (R) suspensions at different concentrations, in different solvents, at two salt concentrations and with the addition of a polymer was reported and discussed.
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页码：1 / 8
页数：8
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