Are biomimetic materials the answer for a more sustainable construction sector?

13th Sep 2024

Innovation around biomimetic materials in the built environment has been inspired by the resilience of nature and natural products. For architects, engineers, designers and property developers, mimicking nature is increasingly seen as a transformative route to a greener way to build.

What are biomimetic materials?

Biomimetic materials are synthetic materials that mimic and replicate the properties of natural materials or objects, with resilience and sustainability being key objectives. Inspired by natural processes and structures, biomimetic materials are used to enhance a building’s performance and longevity.

The potential impact of biomimetic materials on construction processes is backed by research. In a paper published in ScienceDirect, researchers from the University of New South Wales state that, ‘bio-inspired materials and structures can play a crucial role in making our buildings greener, more energy-efficient, more sustainable, and more resilient’.

A widely adopted example of biomimetic design applications is concrete composite material. Other innovations are bacteria-enhanced concretes and soils, biomimetic building envelope materials, and the bio-inspired design of larger structures.

Key features of biomimetic materials

Biomimetic materials are increasingly used to create buildings that are resilient, durable, lightweight and sustainable. Some key features of biomimetic materials are:

Self-cleaning surfaces – The Lotus Effect

The discovery of tiny wax-coated bumps on lotus petals, that repel droplets and remove dust and contaminants, inspired technologies for self-cleaning surfaces.

Energy efficiencies

Nature optimises energy efficiency. This has inspired the use of renewable energy sources and the optimisation of passive heating and cooling applications in buildings.

Natural structures

Designers and architects take inspiration from natural forms such as tree branch patterns and seashell spirals to design buildings of structural integrity and energy efficient systems.

Regulation of temperature

Inspiration is taken from how organisms regulate temperature, ventilation and airflow to design HVAC systems and building envelopes.

The benefits of biomimetic materials

Enhanced resilience and durability

Replicating the regenerative properties of nature extends the life of concrete structures. A good example of this is self-healing concrete materials.

Energy efficiency

By mimicking natural ventilation systems and using renewable energy sources, the carbon footprint of buildings is drastically reduced.

Reduced environmental impact

By replicating natural processes, biomimetic materials generate less waste and use fewer natural resources throughout their lifecycle. This, and their minimal use of energy, reduces the environmental impact of buildings.

How biomimetic materials are being applied and researched in the UK

Biomimetic materials have been successfully used for high profile building designs in the UK.

The design of The Gherkin in London was inspired by the anatomy of the Venus Flower Basket sea sponge that allows the building to absorb and regulate temperature, rather than opting for energy-sapping air conditioning and heating systems.

The Eden Project’s spherical greenhouse structural system of hexagons and  pentagons was inspired by the study of pollen grains, Radiolaria and carbon molecules.

Scientific materials research is ongoing in the UK. Papers such as Biomimetic Innovation in the UK Construction Industry: An Assessment of Adoption Readiness are addressing the adoption of biomimetic materials in combating climate change alongside the need for systemic change in the sector’s traditional workflows.

What does the future hold for biomimetic materials?

Advancements in biomimetic materials have the potential to revolutionise construction practices and materials.

In an article published by MAPFRE Global Risks, Marlén López, Director of the Biomimetics Laboratory, envisages a future that is ‘more organic, sustainable, and naturally intelligent, using systems and materials with the ability to adapt, interact, self-repair, and recycle’. The challenge lies in the selection of natural models and carrying out their technological transfer.

In summary...

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References

  1. ScienceDirect – From biology to biomimicry: Using nature to build better structures – A review
  2. Nanografi – Following the Natures Lead: Lotus Effect Self-Cleaning
  3. The Gherkin – Unwrapping an Icon
  4. Eden Project – Architecture
  5. ResearchGate – Biomimetic Innovation in the UK Construction Industry: An Assessment of Adoption Readiness
  6. MAPFRE Global Risks Magazine – Biomimetics, the alternative for more sustainable construction