期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 22, 期 1, 页码 15-19出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9cp05225a
关键词
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资金
- Institute for Advanced Studies, through a Benjamin Meaker Visiting Professorship
- Cabot Institute for the Environment of the University of Bristol
- CNPq (Universal Call)
- CAPES agency
Phosphates are well known as dispersants for a variety of colloidal particles. Here however we use rheological measurements to show that high molecular weight polyphosphates (PP) can instead act as a flocculant for LAPONITE (R) clay platelets. The proposed mechanism is bridging of PP between clay particle edges, leading to highly charged clusters forming a Wigner glass. Dynamic light scattering shows a bimodal cluster size distribution, independent of PP molecular weight, but the highest molecular weight gave the highest viscous and loss moduli for the PP-clay solid. These unique all-inorganic solids may have application in solid-state ionic conducting materials, controlled release fertilizers and biomedical applications.
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