Document Details Document Type : Article In Journal  Document Title : Emulsion-templated porous materials (PolyHIPEs) for selective ion and Emulsion-templated porous materials (PolyHIPEs) for selective ion and   Subject : Emulsion-templated porous materials (PolyHIPEs) for selective ion and  Document Language : English  Abstract : Functionalised emulsion-templated polymers (PolyHIPEs) are reported as new materials for electroanalytical applications. PolyHIPEs, which are prepared from high internal phase emulsions (HIPEs), were tailored by optimisation of polymerisation conditions to yield well-defined, tubular, porous membranes. The PolyHIPE membrane backbone was activated by incorporating ionophores, graphite particles, electron mediators and enzymes. The results show that a valinomycin ionophore impregnated, plasticised membrane shows a Nernstian response to K+ ions with improved detection limits and selectivity coefficients compared to traditional PVC membranes. The graphite/mediator/enzyme loaded membranes exhibit quasi-reversible redox behaviour with semi-infinite linear diffusion at fast scan rates tending to radial diffusion at slow scan rates. Additionally, composite, asymmetric membrane structures with a porous PolyHIPE membrane and a PVC membrane exclude proteins such as BSA (bovine serum albumin) and a1 acid glycoprotein (AAG). These preliminary results demonstrate that plasticised membranes with functionalised skeletons and with controllable porosity such as PolyHIPE membranes are very promising for the fabrication of sensors with integrated separation.  ISSN : 0  Journal Name : Journal of Materials Chemistry  Volume : 17  Issue Number : 23  Publishing Year : 1428 AH 2007 AD  Number Of Pages : 8  Article Type : Article  Added Date : Sunday, May 31, 2009  Researchers Researcher Name (Arabic) Researcher Name (English) Researcher Type Dr Grade Email Ekram Ekram Researcher Doctorate   Chuntian Chuntian Investigator Doctorate   Neil R. Neil R. Researcher Doctorate   Ritu Ritu Researcher Doctorate   Back To Researches Page