Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 32, Issue 19, Pages 1563-1568Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.201100382
Keywords
colloids; hierarchical structures; polymeric materials; structure-property relationship; titanium dioxide
Categories
Funding
- UK Engineering and Physical Sciences Research Council (EPSRC) [EP/E007538/1]
- Imperial College London
- Halliburton Energy Services
- Imperial College
- EPSRC [EP/E007538/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/E007538/1] Funding Source: researchfish
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Inspired by natural porous materials, such as wood, bamboo and spongy bone consisting of individual structural units that are hierarchically arranged to optimise mechanical properties such as strength and toughness, synthetic macroporous polymers with enhanced physical properties were created by emulsion templating. Hierarchical poly(merised) high internal phase emulsions (HIPE) were created from HIPEs stabilised simultaneously by particles and a surfactant. In these HIPEs, surfactant stabilised and particle stabilised water droplets coexist, which upon polymerisation of the minority oil phase gives rise to macroporous polymers with a hierarchical pore structure. An improvement of the mechanical properties of our hierarchically structured macroporous polymers at equal porosity was observed, due to a more efficient packing of pores in a configuration that improves mechanical strength despite the presence of interconnecting pore throats. Moreover, the permeability of the hierarchically structured polyHIPEs are exceeding those measured for conventional polyHIPEs made from surfactant only stabilised HIPEs.
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