In our successful proposal in the Adventurous Manufacturing round 2 call, we proposed a scalable, inexpensive, commodity materials-based water-based reversible adhesive. This glue needed to be stable for periods of many months and easily applied by the end user. This was achieved and a UK patent was submitted (P340927GB) a year after the project start. The technology is extremely simple; we used emulsion polymerization to synthesize polymer nanoparticles. These were stabilized with polyelectrolytes, either physically adsorbed to, or polymerized from, the nanoparticles. Polyelectrolytes are polymers that are either positively (polycations) or negatively (polyanions) charged. This water-based emulsion forms a film, just like a paint. When a surface coated with a polyanion-stabilized emulsion is brought into contact with another surface coated with a polycation-stabilized emulsion there is good adhesion. This adhesion further improves when the films dry, and, unusually for a water-based adhesive, does not fail in moist and humid environments. However, as intended, the bond does fail in an acidic or alkaline environment. This creates a unique concept in adhesive technologies because the adhesion can be made to fail on demand, which is an important concept for recycling. Furthermore, this is neither a structural adhesive (based on covalent bonds) nor a pressure-sensitive adhesive, and is therefore an entirely new class of glue, which we deem an electrostatic adhesive. The purpose of this proposal is to develop the technology in the following ways: (i) increase the versatility of the technology by administering it as a spray rather than a paint; (ii) increase the speed of debonding by patterning the surface(s) or by reducing the pH difference from neutral at which bonding fails; (iii) developing fully environmentally friendly materials for use in the adhesive; and (iv) making the adhesive conducting so that it can be applied to e-waste, and, in particular, the recycling of printed circuit boards. As part of this fourth work package, the glue will also be adapted for thermal heat management tasks. Electronic components often reach elevated temperatures, and a glue with good thermal conduction that can adhere a heat sink and remain stable at temperatures of ~70 degrees C will be developed. A fifth work package will involve testing the electronic and thermal reversible glue in real-world environments. Some work on the first two of these work packages will be performed before the start of the project, and some work demonstrating the feasibility of an adhesive that is more environmentally friendly than the first formulations has already been performed, e.g., through the addition of epoxidized soybean oil to the formulations. The fourth and fifth work packages represent an entirely new departure for this technology. The challenges facing us are due to this being a disruptive (step-change) technology, and because it is difficult to convince manufacturers to adapt their processes, we need to adapt ours to work with current processes. This is certainly the case for the bottle-labelling industry, which we have initially targeted, and it may also be needed in other industries. By the end of the grant (September 2026), our new glue will be commercially viable for use in industries working in areas such as labelling and packaging, specialist parts (e.g., car manufacture), and electronics.

The purpose of this proposal is to create a water-based reversible adhesive using commodity materials that is inexpensive, scalable, and environmentally friendly. The target impact of this research is a commercially successful adhesive that has widespread applications, particularly in areas where recycling is important, such as bottle labelling. Other areas, such as automotive parts and e-waste management, would also benefit by supporting a design for an environment approach in which, at the end of the first life cycle, products can be dismantled, and parts repurposed. The technology can also function as a simple water-based adhesive to replace other glues based on volatile organic compounds. The premise is simple: a surface coated with a positively charged polymer can adhere to one coated with a negatively charged polymer. These will stick in water and remain adhered even after the contact has dried. Changing the local pH changes the charge on the polyelectrolytes so that, in an acid pH, the polyacid will become neutral. The polybase will remain charged and the adhesion fails. Previous demonstrations of reversible adhesion have required the end-user to perform significant chemistry. Here we are proposing a simple route to reversible adhesion based on a standard polymerization process. The surfaces to be adhered would each be coated by separate layers and joined. Adhesion is expected to be instantaneous and durable. Unlike other water-based adhesives, exposure to moisture would not compromise the joint. An acid or alkaline wash would be used to separate the two components. A rapid and effective means of disjoining requires significant research and forms a large part of this proposal. In addition, the spray coating of polyelectrolytes onto surfaces will also be explored as a simple route to adhesion for a limited range of applications. The technology will be validated in collaboration with partner companies.

Vision - The fellowship seeks to radically transform the linear Waste Electrical and Electronic Equipment (WEEE) system to develop a low-carbon, Circular Economy (CE) for Electrical and Electronic Equipment (EEE) in the UK. This fellowship incorporates a programme of research that establishes an innovative whole systems design approach to WEEE, integrating systems engineering, engineering design and product-service system design methodologies. The fellowship will to lead the academic work necessary to support a fully CE for EEE in the UK, through effective reduce, reuse, repair, remanufacturing, recycling and recovery, with the aim of making the UK the first country in the world to eliminate WEEE. Rationale and strategic importance - The rapid development of digitalisation has brought disruptive changes to the economy and life, as well as a growth in the consumption of Electrical and Electronic Equipment (EEE). Waste Electrical and Electronic Equipment (WEEE) is now the fastest growing waste stream in the UK and globally. The UK generates up to 24.9kg per head and throws 155,000 tonnes of WEEE in household bins every year. In 2013, the UK set out WEEE Regulations, to encourage safe and responsible collection, recycling and recovery. However, WEEE collection rates show that the UK is failing to meet its targets. Less that 35% of EEE placed on the market is recovered, meaning that the vast majority is sent to landfill, incinerated or illegally exported to other countries at its end of life. Developing a Circular Economy (CE) for EEE is expected to result in widespread economic, environmental and societal benefits for the UK. The value of precious metals found within UK's unrecovered WEEE is over £370 million annually. WEEE also includes many critical raw materials (e.g. magnesium, cobalt and tungsten) which are of high supply chain risk and importance to the UK. For example, China provides 98% of the EU's supply of rare earth elements, and South Africa provides 71% of the EU's platinum. Increasing the recovery of such critical raw materials from WEEE is therefore a strategic priority for the UK to mitigate supply chain risks. In addition, the effective recovery of WEEE is critical to achieving the UK's net zero targets. For every tonne of e-waste collected and recycled, 1.44 tonnes of CO2 emissions are avoided. Finally, WEEE that is not properly managed and leaks into the environment can be extremely damaging to nature and human health. A CE for EEE will also eliminate reliance on highly-polluting mining and material extraction industries. Academic contribution - Existing research has addressed problems in the WEEE sector across different life-cycle phases including: material extraction (e.g. technology metals circularity), manufacturing (e.g. increasing post-consumer plastic in WEEE), distribution (e.g. circular business models), use (e.g. emotional durability, repair), and, end of life (e.g. novel recycling technologies). However, a holistic perspective is currently lacking, which is needed to transition to a fully CE for EEE. This fellowship will address these limitations and build on an established body of research to develop novel solutions for a low-carbon, CE for EEE in the UK. It is academically excellent in that it will: (1) generate scientific knowledge and data on the WEEE system in the UK, which includes material flow analysis and data on related carbon emissions. This data can be used to inform decision-making, policy and research; (2) develop novel (technology-enabled) solutions for a CE for EEE in the UK. These solutions can be replicated in other contexts via circular product design and circular business model frameworks; (3) establish an innovative whole systems design methodological approach, which can be applied to study other material streams (e.g. plastics, textiles), to enable a low-carbon, resource-efficient CE.

Vision - The fellowship seeks to radically transform the linear Waste Electrical and Electronic Equipment (WEEE) system to develop a low-carbon, Circular Economy (CE) for Electrical and Electronic Equipment (EEE) in the UK. This fellowship incorporates a programme of research that establishes an innovative whole systems design approach to WEEE, integrating systems engineering, engineering design and product-service system design methodologies. The fellowship will to lead the academic work necessary to support a fully CE for EEE in the UK, through effective reduce, reuse, repair, remanufacturing, recycling and recovery, with the aim of making the UK the first country in the world to eliminate WEEE. Rationale and strategic importance - The rapid development of digitalisation has brought disruptive changes to the economy and life, as well as a growth in the consumption of Electrical and Electronic Equipment (EEE). Waste Electrical and Electronic Equipment (WEEE) is now the fastest growing waste stream in the UK and globally. The UK generates up to 24.9kg per head and throws 155,000 tonnes of WEEE in household bins every year. In 2013, the UK set out WEEE Regulations, to encourage safe and responsible collection, recycling and recovery. However, WEEE collection rates show that the UK is failing to meet its targets. Less that 35% of EEE placed on the market is recovered, meaning that the vast majority is sent to landfill, incinerated or illegally exported to other countries at its end of life. Developing a Circular Economy (CE) for EEE is expected to result in widespread economic, environmental and societal benefits for the UK. The value of precious metals found within UK's unrecovered WEEE is over £370 million annually. WEEE also includes many critical raw materials (e.g. magnesium, cobalt and tungsten) which are of high supply chain risk and importance to the UK. For example, China provides 98% of the EU's supply of rare earth elements, and South Africa provides 71% of the EU's platinum. Increasing the recovery of such critical raw materials from WEEE is therefore a strategic priority for the UK to mitigate supply chain risks. In addition, the effective recovery of WEEE is critical to achieving the UK's net zero targets. For every tonne of e-waste collected and recycled, 1.44 tonnes of CO2 emissions are avoided. Finally, WEEE that is not properly managed and leaks into the environment can be extremely damaging to nature and human health. A CE for EEE will also eliminate reliance on highly-polluting mining and material extraction industries. Academic contribution - Existing research has addressed problems in the WEEE sector across different life-cycle phases including: material extraction (e.g. technology metals circularity), manufacturing (e.g. increasing post-consumer plastic in WEEE), distribution (e.g. circular business models), use (e.g. emotional durability, repair), and, end of life (e.g. novel recycling technologies). However, a holistic perspective is currently lacking, which is needed to transition to a fully CE for EEE. This fellowship will address these limitations and build on an established body of research to develop novel solutions for a low-carbon, CE for EEE in the UK. It is academically excellent in that it will: (1) generate scientific knowledge and data on the WEEE system in the UK, which includes material flow analysis and data on related carbon emissions. This data can be used to inform decision-making, policy and research; (2) develop novel (technology-enabled) solutions for a CE for EEE in the UK. These solutions can be replicated in other contexts via circular product design and circular business model frameworks; (3) establish an innovative whole systems design methodological approach, which can be applied to study other material streams (e.g. plastics, textiles), to enable a low-carbon, resource-efficient CE.

This research proposal by the ReVISIONS consortium aims to provide the knowledge for public agencies and companies to plan regional infrastructure for transport, water, waste, and energy, (ranging from large capital schemes to small scale decentralised services), in a more coordinated and integrated way so as to maximise economic competitiveness, reduce environmental and resource impacts, and allow households to live more sustainably with an enhanced quality of life. This research will explore the inter-relationships between infrastructure policies and measures at the regional and local scales and explore the tensions and interactions that exist across these scales, and between sectors. The research builds on the expertise, data, models, and tools of the EPSRC sustainable urban environments projects of SOLUTIONS, (land use and transport), WaND, (water), and SUE-Waste, with additional expertise on energy generation and supply, and building energy demand. The research will aim to develop a holistic and practical integrated framework for the analysis and assessment of the sustainability of regional spatial development. It will devise and test alternative regional spatial strategies integrated across infrastructure sectors and spatial scales to investigate to what extent infrastructure selection, investment, regulation, and pricing can help to achieve more sustainable ways of living. At the regional scale these options will range from focussing new development on the core city of the region, to allocating most of the new dwellings within planned new developments dispersed throughout the region. Regional policies affect the location of development and the density of housing and hence the demand for transport, energy, water and waste services, which has major implications for infrastructure provision. Whilst regional policies can enhance the sustainability of the allocation of land and movement of resources at the regional scale, they also risk constraining sustainable development through limiting opportunities for sustainable action at the local scale. Local solutions clearly have implications at the regional level (via aggregate demand for travel and resources, and waste flows), and have an important role in making efficient use of existing infrastructure capacity and obviating the need for potentially unsustainable capital works. These local sustainability improvements will be re-aggregated to estimate the impacts at the regional level for each of these integrated regional options.The research will be based on case studies of the Greater South East regions, (London, East and South East of England), and contrasted with a case study of a lower growth more polycentric region, such as the North East of England. The research will be carried out in parallel with similar case studies of city regions in other parts of the world to compare and contrast regions of similar size to the Greater South East but at different stages of development. These cases studies will include Beijing, Sao Paulo, and possibly Los Angeles.Each option will be assessed across a wide range of criteria encompassing environmental impacts, use of resources, economy, social inclusion, health, and other quality of life factors. The options will be compared within a multi-criteria assessment framework in full consultation with end users and stakeholders. This will identify the most robust options that perform well for different value judgements and different future scenarios. The research will deliver generic normative guidance and decision support tools for use by central and regional government departments and agencies, regional assemblies, utility companies, developers, planners and designers.