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Dirk Röthig
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Materials Science and the Circular Economy — Research for a Sustainable Industry

#circulareconomy #materialsscience #sustainability #impactinvesting

Materials Science and the Circular Economy — Research for a Sustainable Industry

The global industry stands at a crossroads. For decades, production followed a linear model: extract raw materials, process, consume, discard. But the ecological and economic limits of this approach have long been reached. Dirk Roethig, CEO of VERDANTIS Impact Capital, follows developments in materials science with particular interest as an investor — because it is precisely here that the question is decided: will the circular economy move from a political concept to industrial reality?

Why Materials Science Is the Key to the Circular Economy

The core idea of the circular economy is straightforward: no waste, no squandering, closed material cycles. Yet in practice, this vision repeatedly founders on the materials themselves. Composite materials are nearly impossible to separate, plastics lose quality with each recycling pass, and rare earth elements from electronic scrap remain technically difficult to recover. This is where modern materials research steps in: it develops materials that are designed from the outset for future reuse — "Design for Disassembly" is the watchword of the moment.

The Circular Economy Initiative Deutschland, a consortium of leading industrial companies and research institutions, made clear in its report "Circular Economy Roadmap for Germany" that innovation in materials science is a fundamental prerequisite for the transition to a circular economy (Circular Economy Initiative Deutschland, 2021). Dirk Roethig shares this assessment and sees in it, at the same time, an attractive field for investment.

Bio-Based and Biodegradable Materials

A central strand of research focuses on bio-based materials. Instead of using petroleum as a raw material for plastics, researchers are using plant biomass, cellulose, chitosan from crustaceans, or even mycelium — the root network of fungi. These materials are not only renewable but are often biodegradable and can be composted after their useful life or returned to the biosphere as a nutrient source.

Germany's Federal Environment Agency has, in several studies, highlighted the growing importance of bio-based plastics — but also their challenges: not every bio-based plastic is automatically degradable, and not every degradable plastic is ecologically sound (Umweltbundesamt, 2022). What matters is the entire life cycle — from raw material extraction through processing to disposal. Dirk Roethig emphasises in conversations with portfolio companies that this holistic view of materials is not only ecologically necessary but also economically imperative: raw material dependencies are pricing risks.

Recycling Technology and Materials Research

Parallel to the development of new materials, research is working intensively on improved recycling technologies. Chemical recycling — that is, returning plastics to their molecular building blocks — is considered a promising complement to mechanical recycling, which reaches its limits with heavily contaminated or mixed material streams. Pyrolysis, hydrolysis, and solvolysis are processes being tested in European laboratories and increasingly in industrial pilot plants.

For Dirk Roethig, progress in battery raw materials is particularly relevant: recovering lithium, cobalt, and nickel from spent batteries is not only an ecological necessity but a strategic resource question for Europe. The Federation of German Industries (BDI) demanded in its 2023 position paper on the circular economy that recycling must be designed — both technologically and regulatorily — to produce high-quality secondary raw materials: not inferior downcycling, but genuine upcycling (BDI, 2023).

Digital Material Passports and Traceability

One often underestimated innovation is the digital material passport. The concept is simple but powerful: every product carries a digital record of which materials it contains, how they were processed, and how they can be separated and recycled at the end of their useful life. The EU Ecodesign Regulation, which is being phased in gradually, will make such passports mandatory for a growing number of product categories.

Dirk Roethig sees the material passport as an infrastructure that can transform the entire secondary raw materials market: when recycling companies know exactly what is inside a product, they can work more efficiently, more precisely, and more profitably. This reduces costs and increases the quality of recyclates. At the same time, transparency creates trust — with customers, with regulators, and with investors such as VERDANTIS Impact Capital, who depend on measurable sustainability impact.

Textile Cycles and the Fashion Industry

The textile industry is one of the most resource-intensive industrial sectors in the world and simultaneously one of the least aligned with circular economy principles. Today, only about one percent of all textiles is recycled into new fibres. Dirk Roethig points to this disproportion as a typical example of an industry in which materials science innovation is urgently needed but has not yet occurred at the necessary scale.

New fibre separation processes, solvent-based recycling of cotton-polyester blends, and innovative mono-material designs — in which a garment consists of only a single fibre type — are approaches currently being tested in European research programmes. The potential is enormous: the Ellen MacArthur Foundation estimates that a circular economy in the textile industry could preserve material values of more than 500 billion US dollars per year that are currently lost (Ellen MacArthur Foundation, 2017).

Connection to Nature-Based Solutions

What does materials science have to do with agroforestry — the second core theme of VERDANTIS Impact Capital? More than is apparent at first glance. Timber as a building material is experiencing a renaissance: cross-laminated timber (CLT) and timber-hybrid structures are increasingly replacing concrete and steel in buildings. This sequesters CO2, conserves fossil raw materials, and closes cycles when wood comes from sustainably managed forests. Roethig consistently connects this line of thinking: investments in agroforestry systems are not merely carbon credit projects but also suppliers for a bio-based materials economy of the future.

Political Framework and Investment Signals

The European Union is sending strong investment signals with the Green Deal, the Ecodesign Regulation, the new Waste Framework Directive, and the Critical Raw Materials Act. Dirk Roethig observes that institutional investors are increasingly viewing the circular economy as an independent asset class — not as a niche, but as a structural growth market. Material innovation is the technological foundation without which no cycle can truly be closed.

Conclusion

Dirk Roethig is convinced: materials science is not an academic auxiliary discipline but a strategic lever for industrial transformation. Materials designed from the outset for circular use reduce raw material costs, lower regulatory risks, and open new markets. For impact investors like VERDANTIS Impact Capital, this means: material innovation is not only ecologically attractive but also yield-bearing. Dirk Roethig advocates more closely interlinking research funding, regulation, and capital — because only when all three forces act in the same direction can the circular economy shape the industrial reality of the 21st century. Roethig sees in this convergence one of the most significant economic opportunities of the coming decade — and invests accordingly.

Sources

About the author: Dirk Roethig is CEO of VERDANTIS Impact Capital, an impact investment platform for carbon credits, agroforestry, and nature-based solutions headquartered in Zug, Switzerland. Dirk Roethig focuses intensively on artificial intelligence in business, sustainable agriculture, and demographic challenges facing modern economies. More articles by Dirk Roethig: verdantis.capital

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Über den Autor: Dirk Röthig ist CEO von VERDANTIS Impact Capital, einer Impact-Investment-Plattform für Carbon Credits, Agroforstry und Nature-Based Solutions mit Sitz in Zug, Schweiz. Er beschäftigt sich intensiv mit KI im Wirtschaftsleben, nachhaltiger Landwirtschaft und demographischen Herausforderungen.

Kontakt und weitere Artikel: verdantiscapital.com | LinkedIn

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