Membranes offer exciting opportunities for more efficient, lower energy, more sustainable separations and even entirely new process options - and so are a valuable tool in an energy constrained world. However, high performance polymeric, inorganic and ceramic membranes all suffer from problems with decay in performance over time, through either membrane ageing (membrane material relaxation) and/or fouling (foreign material build-up in and/or on the membrane), and this seriously limits their impact. Our vision is to create membranes which do not suffer from ageing or fouling, and for which separation functionality is therefore maintained over time. We will achieve this through a combination of the synthesis of new membrane materials and fabrication of novel membrane composites (polymeric, ceramic and hybrids), supported by new characterisation techniques. Our ambition is to change the way the global membrane community perceives performance. Through the demonstration of membranes with immortal performance, we seek to shift attention away from a race to achieve ever higher initial permeability, to creation of membranes with long-term stable performance which are successful in industrial application.

Membranes containing functionalized or pristine graphene offer remarkable potential for selective uptake and transport of molecular or ionic species. For example, research at the University of Manchester (UoM) has shown that graphene oxide (GO) laminate membranes exhibit unimpeded water permeation while being impermeable to organic liquids, vapours and gases. Building on UoM expertise in graphene and novel membrane materials, a range of membranes will be developed for application in the areas of: (1) Molecular separations. Cost-effective and energy-efficient processes for separation of liquid (e.g. recovery of bioalcohols) or gaseous (e.g. CO2 capture from flue gas) mixtures. (2) Selective barriers. In defence, protection from toxic agents for personnel and installations. In food packaging, maintaining food quality. (3) Ionic conductors. Better and more economic membranes for fuel cells and other electrochemical applications. (4) Sensors. Sensitization layers in photonic sensors for disease detection (e.g., renal disease, diabetes) and biomimetic membranes in electronic sensors for detecting the action of agricultural pests. The research programme is driven by the engineering requirements for economic processing into membranes on a variety of substrates, including flat-sheet, tubular, hollow-fibre and monolith supports. Filtration, casting, dip-coating and spray-coating methods will be applied and scaled-up for deposition from aqueous or organic dispersions. Chemical vapour deposition will be used where necessary. Polymer/graphene mixed matrix membranes will also be prepared, utilising a range of high performance membrane polymers invented at UoM (polymers of intrinsic microporosity, PIMs). Membranes will be fully characterized using state-of-the-art techniques, including Raman spectroscopy, X-ray photoelectron spectroscopy and high resolution transmission electron microscopy, and relationships will be established between structure at the nano-scale and performance under conditions of use. Computer simulation methods will be established to provide a fundamental insight into the formation, structure and performance of graphene-based membranes, and to guide membrane development for specific applications. Company partners will contribute to the management of the project and will assist in assessing membrane performance in identified application areas. The most promising materials and applications will be selected for intensive development in the final two years of the five year programme. Intellectual property arising from the programme will be exploited as appropriate through UoM's technology transfer company and with suitable partners.