期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 18, 期 6, 页码 4310-4315出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5cp07576a
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资金
- National Science Foundation (NSF-CBET) [0932901, 1336311]
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [1336311] Funding Source: National Science Foundation
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1435461] Funding Source: National Science Foundation
Ternary mixtures composed of polyisobutylene (PIB), polyethylene oxide (PEO), and silica particles yield three distinct open-pore morphologies depending on the mixture composition: (1) pendular network (particles bonded together by menisci of PEO); (2) capillary aggregate network (particles and PEO form a combined phase with strongly solid-like properties which forms a percolating network); (3) cocontinuous morphology (silica and the PEO form a highly viscous combined phase which retards interfacial tension-driven coarsening). Remarkably, interfacial tension plays altogether different roles in stabilizing these threemorphologies: stabilizing the first, not affecting the second, and destabilizing the last. The first two of these morphologies appear to be generalizable to other systems, e.g. to oil/water/particle mixtures. In all three cases, the pores do not collapse even after flow, i.e. all three porous morphologies are amenable to processing.
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