A team led by M.A.S.R. Saadi and Muhammad Maksud Rahman has developed a biomaterial that they hope could be used for the “next disposable water bottle." Photo courtesy Rice University.

Houston researchers develop strong biomaterial that could replace plastic

plastic problem

Collaborators from two Houston universities are leading the way in engineering a biomaterial into a scalable, multifunctional material that could potentially replace plastic.

The research was led by Muhammad Maksud Rahman, an assistant professor of mechanical and aerospace engineering at the University of Houston and an adjunct assistant professor of materials science and nanoengineering at Rice University. The team shared its findings in a study in the journal Nature Communications earlier this month. M.A.S.R. Saadi, a doctoral student in material science and nanoengineering at Rice, served as the first author.

The study introduced a biosynthesis technique that aligns bacterial cellulose fibers in real-time, which resulted in robust biopolymer sheets with “exceptional mechanical properties,” according to the researchers.

Biomaterials typically have weaker mechanical properties than their synthetic counterparts. However, the team was able to develop sheets of material with similar strengths to some metals and glasses. And still, the material was foldable and fully biodegradable.

To achieve this, the team developed a rotational bioreactor and utilized fluid motion to guide the bacteria fibers into a consistent alignment, rather than allowing them to align randomly, as they would in nature.

The process also allowed the team to easily integrate nanoscale additives—like graphene, carbon nanotubes and boron nitride—making the sheets stronger and improving the thermal properties.

“This dynamic biosynthesis approach enables the creation of stronger materials with greater functionality,” Saadi said in a release. “The method allows for the easy integration of various nanoscale additives directly into the bacterial cellulose, making it possible to customize material properties for specific applications.”

Ultimately, the scientists at UH and Rice hope this discovery could be used for the “next disposable water bottle,” which would be made by biodegradable biopolymers in bacterial cellulose, an abundant resource on Earth.

Additionally, the team sees applications for the materials in the packaging, breathable textiles, electronics, food and energy sectors.

“We envision these strong, multifunctional and eco-friendly bacterial cellulose sheets becoming ubiquitous, replacing plastics in various industries and helping mitigate environmental damage,” Rahman said the release.

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This article originally appeared on our sister site, EnergyCapitalHTX.com.

Houston-based Circulus, which just received a $100 million credit facility, focuses on innovative plastics recycling. Photo via circulus.com

Innovative Houston plastics company scores $100M 'Green Loan' and prepares to scale

seeing green

Fueled by a new $100 million credit facility, a Houston-based company that specializes in plastics recycling is establishing a nationwide network of recycling plants.

Circulus Holdings secured the $100 million credit facility from Riverstone Credit Partners, which has an office in Houston. This "green" loan is aimed at supporting environmental sustainability.

David Hudson, founder and CEO of Circulus, says in a news release that the credit facility "enables Circulus to rapidly develop a broad network of facilities and further the company's commitment to sustainable manufacturing. We look forward to supporting green-based jobs and preserving our environment for future generations."

Circulus, a portfolio company of Houston-based private equity firm Ara Partners, recently opened its first plastics recycling facility. The 110,000-square-foot plant is in Riverbank, California, near Modesto. It employs 45 people. So far, other Circulus plants, each of which will be larger than the California facility, are planned for Alabama, Oklahoma, the Midwest, and the Northeast.

Circulus is building plants that will transform lower-grade plastic into post-consumer resin so that it's suitable for commercial and industrial uses.

Circulus says it is diverting plastic from landfills, incinerators, and oceans and "upcycling" it into products, including plastic bags and plastic wrap. Customers for those products include retailers, resin producers, packaging manufacturers, and makers of consumer packaged goods. The company says greenhouse gas emissions associated with production of its post-consumer resin are about 88 percent below that of virgin resin.

"Through our significant investment in infrastructure and commitment to manufacturing excellence, we are supporting green job creation and reinforcing the nation's global position in sustainable manufacturing," Hudson says in a news release.

Before Circulus, Hudson was an operating partner at Ara Partners.

Founded in 2019, Circulus employs a dozen people in Houston and plans to add workers here as its network of facilities expands. Circulus is set up as a public benefit LLC, a for-profit business that promotes a social benefit for the public.

Ara Partners invests in decarbonization-focused businesses in the manufacturing, chemicals and materials, energy, and food and agriculture sectors. Aside from Circulus, portfolio companies include Houston-based Path Environmental Technology, which provides a decarbonization-oriented industrial services platform for above-ground storage tanks, and Arlington-based Priority Power Management, an energy services provider whose priorities include carbon neutrality and smart energy.

Circulus is breaking into a plastics recycling market whose global size in 2020 was estimated at $39.9 billion, according to Imarc Group, a market research company. The firm projects the market will grow to $56.5 billion by 2026.

"The demand for plastic material has been constantly increasing across several industries like food and beverage, automotive, packaging, and healthcare. The development of these industries can be accredited to rising population, inflating disposable incomes, and continuous product innovations," Imarc Group says. "In this context, higher manufacturing cost of virgin resins has necessitated the use of recycled plastic products, thereby bolstering the growth of the global recycled plastics market."

Verified Market Research estimates the global market for post-consumer recycled plastics at nearly $15.2 billion in 2020 and forecasts it will rise to almost $22.4 billion by 2028.

"The products produced from these plastics close the loop by diverting them from landfills and enabling them to be recycled," Verified Market Research says. "The advantages of employing post-consumer plastics also assist in addressing … microplastics in the environment. Microplastics are originated from plastic waste that has been deposited into the environment."

Solugen, which uses plant-centered biotechnology to produce environmentally friendly chemicals, has raised an additional $30 million and is speculated to soon reach unicorn status. Photo via solugentech.com

Houston startup raises $30M, plans to be 'next iconic chemical company' with plant-based alternatives

climate tech

While Forbes recently anointed Houston-based Solugen Inc. as one of the next billion-dollar "unicorns" in the startup world, Dr. Gaurab Chakrabarti shrugs off the unicorn buzz.

Chakrabarti, a physician and scientist who's co-founder and CEO of the startup, concedes he doesn't know whether Solugen will be worth $1 billion or not. But he does know that the startup aspires to be a key competitor in the emerging "climate tech" sector, whose players strive to combat climate change. Chakrabarti estimates the climate-tech chemical space alone represents a global market opportunity valued at $1 trillion to $2 trillion per year.

Solugen's overarching goal in the climate-tech market: Replace petroleum-based chemicals with plant-based substitutes.

"I'd love it if we were the poster child that drives climate tech to be the next big, sexy trend," Chakrabarti says.

Chakrabarti acknowledges Solugen's investors, executives, and employees hope the startup succeeds financially. But success, he believes, goes beyond making money and plotting an exit strategy. Instead, Chakrabarti emphasizes "a shift in thinking" on climate tech that he says promises to transform the fledgling sector into a "true niche" that'll be "good for everyone."

"Who cares if people are all hyped up for the wrong reasons?" says Chakrabarti, referring to the unicorn speculation.

Solugen sits at the crossroads of biology and chemistry. In short, the startup taps into plant-centered biotechnology to produce environmentally friendly chemicals and "decarbonize" the chemical industry.

"Quite simply, we want to become the next DowDuPont or the next iconic chemical company, but using principles of green chemistry instead of principles from petroleum chemistry," Chakrabarti says.

If Solugen does reach the icon stratosphere, Chakrabarti envisions it doing so on a speedy schedule. In the traditional petrochemical market, it can take 10 to 20 years to put a new product on the market, he says. "I don't have that kind of time. I'm a very impatient person," Chakrabarti says.

Gaurab Chakrabarti Gaurab Chakrabarti, CEO and co-founder of Solugen, isn't paying any mind to his company's predicted unicorn status — rather he's focusing on the difference he can make on reducing carbon emissions. Photo via solugentech.com

Spurred by that restlessness, Chakrabarti seeks to propel Solugen's products from concept to commercialization in the span of two years. He says the startup already has proven the ability to do that with its sugar-derived hydrogen peroxide product.

"We're going to continue to do that, and it would be great if we can continue demonstrating new [products] coming to market once a year," says Chakrabarti, who grew up in Sugar Land.

Solugen seems to have plenty of financial fuel to make that happen. In April, Solugen raised $30 million in venture capital as an add-on to its Series B funding, which initially closed May 2019. That brings its total VC haul to $68 million since it was founded in 2016, according to Forbes. The recent funding lifted the company's valuation to $250 million, putting it $750 million away from unicorn territory.

Chakrabarti doesn't dismiss the notion of an eventual IPO for Solugen but says being acquired isn't "terribly interesting to me."

"If you want to make money, you can always go be a banker," he notes.

Chakrabarti estimates Solugen will generate $30 million to $40 million in revenue this year, up from $12 million in 2019. Profit remains elusive, though, as the company pours its gains into R&D. The company graduated in 2017 from the Y Combinator startup accelerator. Aside from Y Combinator and Unicorn Venture Partners, investors include Founders Fund, Refactor Capital, Fifty Years, and KdT Ventures.

Solugen's current lineup features fewer than a half-dozen products, which are sold to industrial and government customers. Hundreds more products are in the pipeline for use in sectors like agriculture and energy, Chakrabarti says.

"It's one of the blessings and curses of this company — there's always something to work on, always something big to scale up," says Chakrabarti, who earned his M.D. and Ph.D. from the University of Texas Southwestern Medical Center in Dallas.

Working on selling Solugen's current products and developing its new products are 70 employees, located at its headquarters in Houston and its new production facility in Lubbock. By the end of this year, the startup should employ close to 100 people, Chakrabarti says.

Chakrabarti hesitates to identify Solugen's competitors, as he believes a perceived rival very well could end up becoming a partner.

"I think everyone eventually should be a partner of Solugen, not competition," he says. "It's an ideology that's actually the competition, an ideology like, 'We've always used petrochemistry. This is just how it's been done.'"

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CultureMap Emails are Awesome

Houston hailed as one of America's 10 best cities for startups

Startup Report

Houston's favorable economic climate is enticing new opportunities for entrepreneurship and growth, and now the city is being hailed as the 7th-best U.S. city for starting a business.

The recognition comes in CommercialCafe's recent "Best Cities for Startups" report, published December 10. The study analyzed large U.S. cities across two population categories – cities with more than 1 million residents and cities with populations between 500,000 and 1 million residents. The report analyzed relevant metrics such as office or coworking costs, Kickstarter funding success, startup density, and survival rates, among others.

Across the biggest U.S. cities with over a million residents, Phoenix, Arizona landed on top as the No. 1 best place to start a new business.

The report's findings revealed 10.6 percent of all businesses in Houston are startups that have been active for less than a year. These new businesses have a survival rate of 64.5 percent, meaning just under two-thirds of all startups in the city will still be running up to five years after they were first established.

Over the last five years, the number of new businesses established in Houston has grown nearly 15 percent. CommercialCafe said new businesses in cities with high startup growth rates tend to "attract top talent" which can eventually lead to securing "vital funding for expansion."

Independent professionals – also known as freelancers – are another crucial resource for new businesses that may need "specialized services" for a fixed amount of time, the report said. Houston's freelance workforce has grown about 9 percent from 2019-2023, and the analysis found there were 97,295 freelancers working in Houston in 2023, compared to 89,528 in 2019.

"Generally, cities in the South and Southwest have experienced strong growth during the surveyed period, in contrast to California cities like Los Angeles and San Diego, where the share of freelancers and gig workers has either stagnated or slightly declined," the report said.

Houston boasts the second-cheapest office space rent nationally, the report found. The average asking price for a 1,000-square-foot workspace (for five employees) in the city added up to $27,124 annually. For startups that want greater flexibility for their workers, the annual cost for a coworking space for the same number of employees in Houston came out to $13,200, which is the fourth-most affordable rate in the U.S.

Other Texas cities with attractive economic environments for startups

Texas, as a whole, is one of the strongest states for starting a new business. Other than Houston, San Antonio (No. 2), Dallas (No. 3), and Fort Worth (No. 4) were also recognized among the top 10 best places to start a business in the category of U.S. cities with more than a million residents.

Austin topped a separate ranking of best cities to start a business with 500,000 to 1 million residents.

"Specifically, the Texas capital was the frontrunner for indicators that looked at the overall share of startups within the local economy, as well as growth rates in five years (2019 to 2023)," the report said. "On top of that, Austin also topped the rankings for its percentage of college-educated residents and its consulting firms, which provide vital support for burgeoning enterprises."

The top 10 best cities to start a new business are:

  • No. 1 – Phoenix, Arizona
  • No. 2 – San Antonio, Texas
  • No. 3 – Dallas, Texas
  • No. 4 – Fort Worth, Texas
  • No. 5 – Jacksonville, Florida
  • No. 6 – San Diego, California
  • No. 7 – Houston, Texas
  • No. 8 – Philadelphia, Pennsylvania
  • No. 9 – Chicago, Illinois
  • No. 10 – Los Angeles, California
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This article originally appeared on CultureMap.com.

Top Houston space news of 2025 soars with NASA deals, lunar missions

Year in Review

Editor's note: As 2025 comes to a close, we're looking back at the stories that defined Houston innovation this year. The space tech sector soared with companies landing huge NASA contracts and furthering their lunar missions. Here are the 10 biggest Houston space tech stories of the year:

Houston native picked for 2025 class of NASA astronaut candidates

Houston native Anna Menon, posing below the first A in “NASA,” is one of 10 new NASA astronaut candidates. Photo courtesy NASA.

NASA has selected 10 new astronaut candidates, including one whose hometown is Houston, for its 2025 training class. The candidates will undergo nearly two years of training before they can assume flight assignments.

Intuitive Machines lands $9.8M to complete orbital transfer vehicle

Intuitive Machines expects to begin manufacturing and flight integration on its orbital transfer vehicle as soon as 2026. Photo courtesy Intuitive Machines.

Houston-based Intuitive Machines, which rang the NASDAQ opening bell July 31, secured a $9.8 million Phase Two government contract for its orbital transfer vehicle. The contract will push the project through its Critical Design Review phase, which is the final engineering milestone before manufacturing can begin.

Houston tech company tapped by NASA for near space initiative

Intuitive Machines is among four companies awarded contracts for NASA’s Near Space Network. Photo via intuitivemachines.com

In January, Intuitive Machines nailed down a NASA deal to expand the agency’s communications network for spacecraft. Additionally, NASA completed the first round of “human in the loop” testing for Intuitive Machines’ Moon RACER lunar terrain vehicle at the agency’s Johnson Space Center. RACER (Reusable Autonomous Crewed Exploration Rover) is one of three commercially developed unpressurized lunar terrain vehicles being considered for NASA’s Artemis lunar initiative.

Texas Space Commission doles out $5.8 million to Houston companies

Axiom Space and FluxWorks are the latest Houston-area companies to receive funding from the Texas Space Commission. Photo via Getty Images.

Two Houston-area companies landed more than $5.8 million in funding from the Texas Space Commission. The commission granted up to $5.5 million to Houston-based Axiom Space and up to $347,196 to Conroe-based FluxWorks in June 2025. The two-year-old commission previously awarded $95.3 million to 14 projects. A little over $34 million remains in the commission-managed Space Exploration and Aeronautics Research Fund.

Houston company awarded $2.5B NASA contract to support astronaut health and space missions

NASA has awarded KBR a five-year, $2.5 billion Human Health and Performance Contract. Photo courtesy NASA.

Houston-based technology and energy solution company KBR was awarded a $2.5 billion NASA contract to support astronaut health and reduce risks during spaceflight missions. Under the terms of the Human Health and Performance Contract 2, KBR will provide support services for several programs, including the Human Research Program, International Space Station Program, Commercial Crew Program, Artemis campaign and others. This will include ensuring crew health, safety, and performance; occupational health services and risk mitigation research for future flights.

Houston engineering firm lands $400M NASA contract

Bastion Technologies has been tapped to provide safety and mission services for NASA's Marshall Space Flight Center in Alabama. Photo via nasa.gov.

NASA granted Houston-based Bastion Technologies Inc. the Safety and Mission Assurance II (SMAS II) award with a maximum potential value of $400 million. The award stipulates that the engineering and technical services company provide safety and mission services for the agency’s Marshall Space Flight Center in Huntsville, Alabama.

Houston startups win NASA funding for space tech projects

Houston startups were recently named among the nearly 300 recipients that received a portion of $44.85 million from NASA to develop space technology. Photo via NASA/Ben Smegelsky

Three Houston startups were granted awards from NASA in July 2025 to develop new technologies for the space agency. The companies were among nearly 300 recipients that received a total agency investment of $44.85 million through the Small Business Innovation Research (SBIR) and Small Business Technology Transfer (STTR) Phase I grant programs.

Texas Republicans are pushing to move NASA headquarters to Houston

Here's why Texas Republicans think NASA's headquarters should move to Texas in 2028. File photo.

Two federal lawmakers from Texas spearheaded a campaign to relocate NASA’s headquarters from Washington, D.C., to the Johnson Space Center in Houston’s Clear Lake area. Houston faces competition on this front, though, as lawmakers from two other states are also vying for this NASA prize. With NASA’s headquarters lease in D.C. set to end in 2028, U.S. Sen. Ted Cruz, a Texas Republican, and U.S. Rep. Brian Babin, a Republican whose congressional district includes the Johnson Space Center, wrote a letter to President Trump touting the Houston area as a prime location for NASA’s headquarters.

Intuitive Machines to acquire NASA-certified deep space navigation company

Intuitive Machines will acquire Kinetx, which marks its entry into the precision navigation and flight dynamics segment of deep space operations. Photo via Getty Images.

In August 2025, Intuitive Machines agreed to buy Tempe, Arizona-based aerospace company KinetX for an undisclosed amount. The deal is expected to close by the end of this year. KinetX specializes in deep space navigation, systems engineering, ground software and constellation mission design. It’s the only company certified by NASA for deep space navigation. KinetX’s navigation software has supported both of Intuitive Machines’ lunar missions.

Axiom Space launches semiconductor and astronaut training initiatives

Axiom Space chief astronaut Michael López-Alegría (left) trains with Axiom’s new “Project Astronaut,” Emiliano Ventura. Photo courtesy of Axiom Space.

In fall 2025, Axiom Space, a Houston-based commercial spaceflight and space infrastructure company, launched initiatives in two very different spheres — semiconductors and astronaut training.

Paraplegic engineer becomes first wheelchair user to blast into space

Space News

A paraplegic engineer from Germany blasted off on a dream-come-true rocket ride with five other passengers Saturday, December 20, leaving her wheelchair behind to float in space while beholding Earth from on high.

Severely injured in a mountain bike accident seven years ago, Michaela Benthaus became the first wheelchair user in space, launching from West Texas with Jeff Bezos’ company Blue Origin. She was accompanied by a retired SpaceX executive also born in Germany, Hans Koenigsmann, who helped organize and, along with Blue Origin, sponsored her trip. Their ticket prices were not divulged.

An ecstatic Benthaus said she laughed all the way up — the capsule soared more than 65 miles (105 kilometers) — and tried to turn upside down once in space.

“It was the coolest experience,” she said shortly after landing.

The 10-minute space-skimming flight required only minor adjustments to accommodate Benthaus, according to the company. That’s because the autonomous New Shepard capsule was designed with accessibility in mind, “making it more accessible to a wider range of people than traditional spaceflight,” said Blue Origin’s Jake Mills, an engineer who trained the crew and assisted them on launch day.

Among Blue Origin’s previous space tourists: those with limited mobility and impaired sight or hearing, and a pair of 90-year-olds.

For Benthaus, Blue Origin added a patient transfer board so she could scoot between the capsule’s hatch and her seat. The recovery team also unrolled a carpet on the desert floor following touchdown, providing immediate access to her wheelchair, which she left behind at liftoff. She practiced in advance, with Koenigsmann taking part with the design and testing. An elevator was already in place at the launch pad to ascend the seven stories to the capsule perched atop the rocket.

Benthaus, 33, part of the European Space Agency’s graduate trainee program in the Netherlands, experienced snippets of weightlessness during a parabolic airplane flight out of Houston in 2022. Less than two years later, she took part in a two-week simulated space mission in Poland.

“I never really thought that going on a spaceflight would be a real option for me because even as like a super healthy person, it’s like so competitive, right?” she told The Associated Press ahead of the flight.

Her accident dashed whatever hope she had. “There is like no history of people with disabilities flying to space," she said.

When Koenigsmann approached her last year about the possibility of flying on Blue Origin and experiencing more than three minutes of weightlessness on a space hop, Benthaus thought there might be a misunderstanding. But there wasn't, and she immediately signed on.

It’s a private mission for Benthaus with no involvement by ESA, which this year cleared reserve astronaut John McFall, an amputee, for a future flight to the International Space Station. The former British Paralympian lost his right leg in a motorcycle accident when he was a teenager.

An injured spinal cord means Benthaus can’t walk at all, unlike McFall who uses a prosthetic leg and could evacuate a space capsule in an emergency at touchdown by himself. Koenigsmann was designated before flight as her emergency helper; he and Mills lifted her out of the capsule and down the short flight of steps at flight’s end.

“You should never give up on your dreams, right?” Benthaus urged following touchdown.

Benthaus was adamant about doing as much as she could by herself. Her goal is to make not only space accessible to the disabled, but to improve accessibility on Earth too.

While getting lots of positive feedback within “my space bubble,” she said outsiders aren't always as inclusive.

“I really hope it’s opening up for people like me, like I hope I’m only the start," she said.

Besides Koenigsmann, Benthaus shared the ride with business executives and investors, and a computer scientist. They raised Blue Origin’s list of space travelers to 86.

Bezos, the billionaire founder of Amazon, created Blue Origin in 2000 and launched on its first passenger spaceflight in 2021. The company has since delivered spacecraft to orbit from Cape Canaveral, Florida, using the bigger and more powerful New Glenn rocket, and is working to send landers to the moon.