A Science of Buildings That Can Grow—And Melt Away
Architect Neri Oxman, creator of ‘material ecology,’ explains how silkworms, shrimp shells and insect exoskeletons could help shape the city of the future.
Architect Neri Oxman, creator of ‘material ecology,’ explains how silkworms, shrimp shells and insect exoskeletons could help shape the city of the future.
While the pandemic heightened speculation about what the city of the future will look like, architect Neri Oxman says she is sticking with a blueprint based on a core principle of her work: In years to come, buildings will be grown, not built.
At Massachusetts Institute of Technology’s Media Lab from 2010 to 2021, Ms. Oxman founded and directed the Mediated Matter group, a team researching in areas including computational design, digital fabrication, materials science and synthetic biology. There, she created a field she calls material ecology.
The result? A body of work that includes a pavilion spun by 6,500 silkworms (with the help of a robotic arm), a series of 3D-printed sculptures filled with liquid channels of the pigment melanin (which she envisions could be used in the façades of buildings to protect against ultraviolet rays), and a collection of artifacts constructed using materials derived from shrimp shells and insect exoskeletons.
Since leaving academia, Ms. Oxman, 46 years old, has focused on Oxman, the New York-based design and technology company that she founded in 2020 with the aim of applying her design philosophy to real-world projects. A retrospective of her work is on display at the San Francisco Museum of Modern Art. The Wall Street Journal spoke to Ms. Oxman about the future of urban architecture and how she thinks design can be used as a tool to fight climate change.
The idea behind material ecology is to enable total synergy between grown and built environments by deploying new digital technologies that allow us to augment bio-based materials for large-scale construction.
It comes down to ethics and availability. We work with the most abundant biopolymers on the planet which include cellulose, found in plant cell walls; pectin, found in apple and lemon skins; and chitin, found in the shells of crustaceans.
Using technology, we can program biomaterials to degrade in response to changing environmental conditions. At MIT, we built three biopolymer pavilions [the Aguahoja pavilions] which, instead of concrete, were built using shrimp shells, fallen leaves and apple skins. We programmed the pavilions to decay at a certain point when exposed to rainwater. This, in turn, nurtures soil microorganisms to fuel new growth.
It’s a circular economy of material that could be used to create biodegradable refugee camps, for example. Once the refugees find a safe haven, the camps would be programmed to melt away in the rain.
It’s complex. When we combine biopolymers including chitosan, pectin and cellulose, the material’s ability to absorb water varies based on its composition. Chitosan, for example, is naturally water-resistant and doesn’t readily dissociate when submerged, while pectin is hydrophilic and dissolves rapidly. By choosing how we blend these components, we can access a spectrum of hydrophilicity—otherwise known as a material’s affinity to water—and this lets us tune or program the speed at which a material breaks down. In essence, we are designing the architectural equivalent of metabolic rate.
For grown buildings to appear in towns and cities, we need to rethink mass production, and this will take five to 10 years to happen in a meaningful way. However, the development of products made from biological materials—cars, for example—could begin within the next year.
The architect and professor Carl Elefante says that “the greenest building is one that is already built.” That’s because the carbon emitted during construction is vast compared to the operating emissions of a given building. We therefore need to find new ways to augment the pre-existing built environment rather than trying to completely rebuild our cities from the ground up.
We need to look at a range of interventions. One is the creation of bioengineered façades for existing buildings. An example: in the U.S. alone, hundreds of billions of square feet of glass façade components are produced every year. As part of our research at MIT, we 3D-printed glass augmented with synthetically engineered microorganisms to produce energy [from the sun]. This allows us to develop solar-harnessing glass façades that can act as a skin for pre-existing buildings.
We must also think about whole-building recycling. A current example is Apple’s headquarters in Cupertino, Calif. The campus was built by Norman Foster using materials from old buildings that used to be on the same site. Rather than simply destroying structures when we no longer have use for them, we must look for ways to augment them using new technology and intelligence.
The architect of the future is interested in formation, as much as she is interested in form. She is a systems thinker, interested in building relationships between objects rather than seeing them as standalone. She invents new technologies with which to design, manufacture and build. She is a gardener, not a master planner
Reprinted by permission of The Wall Street Journal, Copyright 2021 Dow Jones & Company. Inc. All Rights Reserved Worldwide. Original date of publication: April 10, 2022.
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Just 55 minutes from Sydney, make this your creative getaway located in the majestic Hawkesbury region.
The enduring appeal of marble has gone into overdrive as designers explore the beauty of coloured stone to create truly inviting and indulgent interiors.
Like all design movements, the return of marble to interiors started quietly enough with the rise of ‘greige’ as the dominant colour palette. A warm version of grey, for a while there, you could barely step into a well-considered residential space without being confronted with the ubiquitous neutral tone.
However, to be successful, this look depended on texture, layering and patterning to provide truly heartfelt spaces with genuine depth. And so Calacatta and Carrara marble entered the room, literally making itself at home in kitchens, bathrooms, and living room hearths, as well as in a myriad of accessories and furniture from small bowls and coasters to coffee and dining tables.
As greige made way for a return to colour in interiors, in recent years designers have turned their attention to bolder choices, moving on from the classic tones of Calacatta, Carrara, and Pietra marbles to Verde Indio, Spanish Gold, and Calacatta Viola.
Not that there is anything new about marble. First documented for use in construction in 3rd century Greece BCE, with evidence it was also used in ancient Turkey and Rome, it was originally chosen for its strength and beauty, as well as its accessibility, extracted from quarries using hammers and wedges and removed using pulleys, levers, and winches rather than the more difficult process of mining. While extraction methods have improved, especially in recent years, the nature of this popular stone is unchanged.
A metamorphic rock composed mostly of calcite, it is formed when limestone is subjected to heat and pressure. When the calcite in the limestone recrystallises, it forms a rock that is a mass of interlocking crystals, creating what we know as marble.
While many countries, including Australia, have marble deposits, about half the world’s supply is sourced from just four countries—Spain, Italy, India, and China. Strong enough to endure extended use, it is also soft enough to be relatively easy to carve while its natural beauty allows it to be polished and honed, giving it a glow that adds depth—and a sense of luxury—to any space it inhabits.
Australian designers have been quick to embrace the use of marble, offering, as it does, the opportunity to create truly unique interiors. Creative director of Mim Design, Emma Mahlook, says while budget is always a consideration, a greater variety of marble has become easier to source in recent years.
“Coloured stones provide an opportunity to create distinctive and striking spaces,” she says. “As such, we are finding that there is a slight shift to bolder and braver choices of coloured stone than the traditional whites and greys.”
For homeowners interested in creating distinctive, outstanding spaces, it is hard to beat, with each piece different from the other.
“No batch of stone is ever the same, which makes it so unique and such an interesting and visually appealing product with colours, textures, and patterns that are sometimes as complex as intricate works of art,” says Mahlook.
She cites a recent commercial project her studio realised for Enoteca Boccaccio, an exclusive Italian restaurant in the heart of the Melbourne suburb of Balwyn, where she specified a selection of coloured marbles to create an intimate and luxurious dining experience that looks to the past, as well as the future.
“The choices of natural stone in Enoteca Boccaccio, which featured marbles Rosso Levanto and Carrara as well as a granite called Domino, were selected to reflect Italy’s streets and embody genuine durability and commitment to the art of preservation,” says Mahlook. “Rosso Levanto and Carrara are archaic marbles with such strong significance connecting to Italy’s rich heritage.”
Colour and Communications Manager at Dulux, Andrea Lucena-Orr, says the interest in coloured marble in Australian design has its origins in more transient hospitality spaces like bars and restaurants, where design is traditionally riskier.
“Typically, it starts in hospitality and commercial environments,” she says. “You tend to get it in high-end homes because it is expensive, but it’s beautiful.”
“That whole natural palette is a huge phenomenon—people are celebrating those imperfections in patterns and shapes now.”
Because no two slabs are the same, Mahlook says there’s the ability to create truly distinctive, personal spaces for clients seeking genuinely idiosyncratic interiors.
“The movement towards coloured natural stones reflects a broader cultural shift towards individuality, sustainability, and innovation in design and architecture,” she says.
For those falling under its spell, Director of Studio Tate, Alex Hopkins, says marble pairs well with other materials such as timber and looks beautiful indoors, particularly in kitchens and bathrooms. However, she cautions there are some things to consider before specifying it at home.
“To ensure marble remains a timeless choice rather than a fleeting trend, we recommend using it selectively and pairing it with contrasting materials,” she says. “It’s crucial to understand its maintenance demands and consider the overall budget, including installation and upkeep costs.”
While it is susceptible to staining because of its porosity, Hopkins says using marble sparingly, for example, in a powder room vanity, can minimise maintenance.
“Different finishes, like honed surfaces, can also help reduce the appearance of wear,” she says. “Working with experienced designers or specialists ensures the marble chosen fits both the aesthetic and functional needs of your space.”
Professionally applied sealants can also make staining less likely.
For those bold enough to take the plunge, Hopkins says the rewards are great.
“Its diverse colour palette and natural veining offer a unique aesthetic that other materials can’t match,” she says.
This stylish family home combines a classic palette and finishes with a flexible floorplan
Just 55 minutes from Sydney, make this your creative getaway located in the majestic Hawkesbury region.