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Næsten alle bilister har prøvet det. Følelsen af at held forhindrede en ulykke, dette ønsker vi at hjælpe med. vi ønsker at sænke trafikulykkes tallet i Danmark, både de små uden personskade og dem der får dødelige konsekvenser.
Derfor er vi ved at udvikle farvefarveskiftende vejstriber, som kan give bilisten en advarsel om vejforholdende hvor personen køre på, så bilisten kan reagere og køre mere hensigtsmæssigt ud fra forholdene.

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Goswami, Basak 2014 - Encyclopedia of Chemical Technology - Sulfur Dyes

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Organiske solceller kan være et bæredygtigt alternativ til de nuværende uorganiske solceller, som er dyre at producere og har en problematisk end-of-life cyklus.

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Mariotti et al. 2020 Green Chem. - Recent advances in eco-friendly and cost-effective materials towards sustainable dye-sensitized solar cells

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Noget at læne sig op ad ift. organiske solceller vs. Si-baserede.

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Solar cell farms are popping up everywhere. Among other things, five different solar farms ensure that Google's new data centre near Fredericia becomes CO ₂-neutral.

Energinet is aware of new, possible solar cell projects that have a total capacity of up to 16 gigawatts. In comparison, Denmark's wind turbine farms' capacity is currently approximately 6 gigawatts.

The solar cells sold today are typically based on mono- and polycrystalline silicon. When recycling solar panels, it is important to know what materials they contain:

Glass: 78 per cent

EVA polymer lamination: 10 per cent

Polyester: 7 per cent

Silicon: 4 per cent

Silver: 0.4 per cent

Copper: 0.3 per cent

(The figures are approximate figures as a percentage of the total weight, source: solcelle.dk)

The lead content is estimated to be 20 mg/W.
(Source: Institute of Photovoltaics, University of Stuttgart)

But what happens to the huge amount of solar panels when they no longer work efficiently and need to be scrapped? The International Renewable Energy Agency estimates that by 2050 there will be 78 million tonnes of solar waste in the world.

- 85 per cent of the material used for solar cells can be recycled today, says researcher in sustainable design and innovation, Lykke Margot Ricard from the Department of Technology and Innovation at the University of Southern Denmark:

- But if we can find a way to dissolve the insistently strong polymer lamination between the glass and solar cells, then it could be possible to recycle more silicon and glass, in whole and separate fractions.

- The strong polymer is used to ensure that the solar panels can withstand all kinds of weather, but it also makes it impossible to split the parts apart in the recycling process. Therefore, today the panels are crushed into smaller pieces of mixed materials leading to low-value recycling option, explains Lykke Margot Ricard:

- If heavy metals such as lead and cadmium are also avoided, then my estimation is that 95-98 per cent of the materials could be recycled.

Toxic lead in solar cells

Lead is a toxic heavy metal that accumulates in nature and in humans. That is why the EU has banned lead in all electronic products with one exception, namely, solar cells.

According to the magazine PV Magazine, which is a leading international solar cell magazine, a typical 60-cell crystalline silicon solar module produced today, contains up to 12 grams of lead (the article is from October 2019).

- I cannot say with certainty how many manufacturers use lead today, but the EU should consider whether it is still necessary to exempt solar cells from the general legislation that applies to electronic. I am convinced that it is completely unnecessary to use lead in solar cells - at least in the solderings.

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I am convinced that it is completely unnecessary to use lead in solar cells

Lykke Margot Ricard, Associate Professor

For example, has the electronics and car industry recently shown us that it is possible to make these without lead in the car batteries, says Lykke Margot Ricard and adds:

- To have this exception with the lead today for solar cells does not exactly drive innovation and the development of new solutions.

And the article in PV Magazine backs her up; There are several alternatives that completely replace lead, but the problem is that manufacturers are not motivated to replace lead with more expensive solutions, as long as it is legal to use lead.

Lykke Margot Ricard points out that the exception in EU legislation comes from a time when solar energy had to compete with fossil fuels in terms of price, efficiency, and not least, renewable energy, which has been crucial to attracting investors.

Focus on recycling

But now we are in a different situation. We are no longer satisfied with the fact that technologies such as wind turbines and solar cells give us green energy. We are also aware that when the technologies are scrapped, the materials must be included in circular material flows.

- We see a paradigm shift. Silicon solar cells are designed to be durable, but when we talk about a circular economy and focus on nature's resources, we see a need to make sustainable designs.

- Then it may well be that the solar cells do not last as long - but this is offset by the fact that their materials can be used in new products.

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For organic solar cells, sustainability is a ground-rule that is repeated throughout the development process

Morten Madsen, Professor

Lykke Margot Ricard points the attention to her colleague, Professor Morten Madsen. He leads the research group OPV Group, which is at the forefront of developing organic solar cells. The researchers hope that in the long run, organic solar cells will replace silicon solar cells, partly because they are sustainable.

- For organic solar cells, sustainability is a ground-rule that is repeated throughout the development process, emphasises Professor Morten Madsen from the Mads Clausen Institute:

- We completely avoid heavy metals and toxic materials. At the same time, our material consumption is much smaller and when we develop modules, we can use bioplastics or other recyclable materials in the substrates on which the solar cells lie.

- With a long-term plan, we even have a vision of using only biodegradable material, Morten Madsen adds and says that his colleague Vida Engmann has received five million kroner from the Carlsberg Foundation to research biodegradable materials.

A completely different sustainability league

Because organic solar cells absorb light much better, they are 1000 times thinner than silicon solar cells. In addition to less material consumption, it also provides aesthetic benefits. The organic solar cells are flexible and can be freely designed with regards to colour and shape. It makes it possible to design and integrate them into buildings - and even into windows without them being visible.

Morten Madsen does not doubt that the organic solar cells are in a completely different sustainability league than the silicon solar cells, which are market leaders today and research, backs him up.

According to a research article from DTU, organic solar cells have the lowest energy payback time, i.e. the time the solar cells have to produce the same amount of energy that was used for their production. And of all green energy technologies, organic solar cells are the technology with the lowest CO2 emissions per kilowatt-hour.

- For example, manufacturing silicon solar cells requires heating to over 1000 degrees. For the production of organic solar cells, the highest temperature is only around 100 degrees, Morten Madsen points out.

Design for recycling

When you look at this from a design perspective as Lykke Margot Ricard does, she sees a movement towards designing for durability, and we must increasingly consider making sustainable designs.

- Because solar and wind energy are so essential for us to achieve climate goals, we expect that the technologies are also sustainable. Of course, they are also relative to fossil technologies, but we must constantly be critical and ask ourselves if we can do it a little better:

- It does not necessarily make sense to use polymer lamination and heavy metals to achieve 25-30 years of durability in products where the technology develops so fast, emphasises Lykke Margot Ricard.

"
Because solar and wind energy are so essential for us to achieve climate goals, we expect that the technologies are also sustainable

Lykke Margot Ricard, Associate Professor

Both in terms of longevity and efficiency, organic solar cells are developing at an extraordinary pace, and there is already a commercial market in the making.

Industry, universities and public institutions collaborate in CLEAN - Denmark's Environmental Technology Cluster Clean to identify and disseminate knowledge of new trends and opportunities in environmental technology. Associate Professor Lykke Margot Ricard and Professor Morten Madsen are members of the Clean Innovation Board, where they focus on circular and environmental considerations within design, manufacturing, processing, use and recycling and recycling of materials.

- We work with several manufacturers who today sell organic solar cells, and even though the durability is less than for silicon solar cells, the difference becomes smaller and smaller. Fortunately, organic solar cells have many other parameters they can compete on, so it is also about new thinking about what solar cells can offer in terms of design, integration and sustainability, Morten Madsen emphasises.

Lykke Margot Ricard completely agrees:

- Silicon solar cells are designed to be durable, but when we talk about green conversion, climate and nature's resources, we must make sustainable designs; avoid toxic materials, use fewer materials and make sure we can separate the materials afterwards so that they can be recycled.

- Then it may well be that the solar cells do not last as long, but we must be willing to pay a little more for the most sustainable solution.

(Photo: Colourbox)

Nanoparticles must bring photosynthesis into the future solar cells

Associate Professor Vida Engmann from OPV Group will in the Artplast project develop solar cells from bio-based semiconductor materials. Semiconductor components today are typically based on silicon.

Preparation of ArtPlast (Artificial chloroPlast = artificial chloroplast) is supported by grants from the Carlsberg Foundation and the Danish Free Research Foundation.

"This is a synthetic platform for bioinspired organic nanoparticles that use photosynthetic processes in the same way as nature. These nanoparticles will not only be able to deliver processes that can promote new solar energy generation as well as storage technologies, but they will also be able to do this in the same way as in nature," says Vida Engmann.

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Solar cells must be designed to be sustainable

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Solar cell farms are popping up everywhere. Among other things, five different solar farms ensure that Google's new data centre near Fredericia becomes CO 2-neutral. Energinet is aware of new, possible solar cell projects that have a total capacity of up to 16 gigawatts. In comparison, Denmark's wind turbine farms' capacity is currently approximately 6 gigawatts.

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Roger et al. 2017 Nat. Rev. Chem. - Earth-abundant catalysts for electrohemical and photoev water splitting

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Cold adapted enzymes produced by fungi from terrestrial and marine Antarctic environments

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PDB101: Molecule of the Month: Alpha-amylase

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Amylases digest starch to produce glucose

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https://www.lens.org/lens/patent/138-037-700-012-373/frontpage?l=en&fbclid=IwAR3_KbDDm7x59rfI6HyZsjkIvGTDcpzIn9naCMlkPUcF4x3aHPed3gDWtDM

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The Lens - Free & Open Patent and Scholarly Search

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WO 2013/007358 A1 - New Sustainable Range Of Sulfur Dyes For Textile And Paper Dyeing The Lens - Free & Open Patent and Scholarly Search

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The invention refers to the manufacturing of a novel group of sulfur dyes in which are used, as raw material, different kind of natural "biomass", usually existing in the nature, and transforming them into soluble dyestuffs, capable to dye textile fibres, preferably cellulose fibres and derivatives, as cotton, viscose, paper, tencel, with high strength and fast color properties.

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https://docs.google.com/presentation/d/14cNjw_apQgUQcOoV-h0rcHlu6bwEFgAjnmvW0BQp4YQ/edit?usp=sharing

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Simon

Radioaktivt affald udgør den største risiko i brugen af kernekraft. Genanvendelse og intelligent afskaffelse er derfor nødvendigt for at denne ellers bæredygtige energiform kan blive populær.

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Naturlige farver et bæredygtig alternativ til de syntetiske farver.

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Naturlige farver et bæredygtig alternativ til de syntetiske farver.

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Emil, Frederikke og Alberte

Naturen er fuld af farver, de er overalt omkring os, dog bruger vi mennesker farver som vi selv har opdaget til stor belastning af naturen. Naturen egene farver kan vi bruge til tekstil industrien til farvning af vores tøj og stoffer.

http://nopr.niscair.res.in/bitstream/123456789/6886/1/IJFTR%2034%284%29%20384-399.pdf?fbclid=IwAR1Spzv4nzbq5Tj4HYMcwsbZBJZPAeyrxNG7eiKBl3Csn4FWMbdH7xWIkaQ

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- Christin og Signe
- Brintmolekyler kan isoleres og bruges direkte som brændstof, men dette kræver udvikling/forbedring af fotokatalysatorer til at udføre kunstig fotosyntese, det ved brug af energi fra sollys kan producere brint.

- Kilder:
https://www.vox.com/2016/6/7/11865424/solar-fuels
https://www.pnas.org/content/113/17/4545
https://onlinelibrary.wiley.com/doi/full/10.1002/anie.201409116

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Enzymer fra Ikka-søjlerne til bæredygtig tøjvask

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Enzymer fra Ikka-søjlerne til bæredygtig tøjvask

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Lena og Anna

Ved Ikka-søjlerne i Grønland er der fundet nogle enzymer, der trives under kolde og alkaline betingelser. Disse enzymer kan udnyttes til at vaske tøj ved lavere temperaturer, hvilket ville kunne sænke CO2-udledningen betydeligt for tøjvask.

https://www.novozymes.com/en/news/news-archive/2010/08/45906

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Genanvendelse af Solventer:
Benjamin, Emil og Nikolaj.

I kemiens verden bliver der brugt en masse solventer, der efter brug bliver smidt ud og brændt som kemisk affald. Det vil vi gerne prøve at forbedre på ved at begynde at genanvende solventer. Det vil blive gjort ved at destillere de næsten rene solventer der bliver smidt ud i laboratorierne. Målet er at sænke indkøbet af solventer, så der spares på indkøb og CO2 udledning ved produktion af solventer.

https://pubs-acs-org.proxy1-bib.sdu.dk/doi/10.1021/acs.oprd.0c00442
http://www.azeotrope.info/

https://solvent--recycling.com/azeotrope_1.html

https://chemicaltweak.com/types-of-distillation/

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Industrial or externally funded PhD students, emeriti and guest researchers: To sign on, use your library card number and password.
If you're not registered as a borrower at the library, you can register here. Afterwards you must send an email to: e-tss@bib.sdu.dk or find your way to the library lending desk at your campus with documentation of your employment.

Access to electronic material at the University Library of Southern Denmark is for personal use exclusively, and only in connection with research and study use. This means that you are not allowed to use the access in connection with a study job, work placement, commercial use etc. Your password is strictly personal and must never be given to anyone else. All access traffic is logged by both the data provider and the library.

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Industrial or externally funded PhD students, emeriti and guest researchers: To sign on, use your library card number and password. If you're not registered as a borrower at the library, you can register here. Afterwards you must send an email to: e-tss@bib.sdu.dk or find your way to the library lending desk at your campus with documentation of your employment.

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Gruppe; Emil, Oskar og Elisabeth

Alene i Danmark kommer flere tusinde til skade hvert år i færdselsuheld. Nogle af disse skyldes bl.a. vejrforhold som f.eks. våde og glatte veje. Vi vil derfor finde et farvestof som kan skifte farve afhængig af temperatur og et andet til at detektere om der er vand på vejen. Dermed kan billister nemmere afgøre hvorvidt vejen er glat eller våd, køre efter forholdene og øge traffiksikkerheden.

https://www.statistikbanken.dk/statbank5a/Graphics/MakeGraph.asp?interactive=true&menu=y&maintable=UHELDK1&pxfile=202191993444343382190UHELDK1.px&gr_type=0&PLanguage=0
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1470576/

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Put en post her med jeres cases til Pitch med:
- Titel
- Gruppemedlemmer
- Illustrativ figur
- 1-3 linjer tekst
- Evt. referencer/kilder