From the Sector

A new technique could create waterproof coatings for clothes out of discarded textiles – far safer for humans and the environment than current coatings, which are typically made with harsh chemicals and carcinogens.

A Cornell research group led by Juan Hinestroza, the Rebecca Q Morgan ’60 Professor of Fiber Science and Apparel Design in the College of Human Ecology (CHE), developed the low-temperature technique for synthesis of superhydrophobic, or waterproof, coatings.

“If we can save one piece of clothing from going into a landfill, then that will be success,” said Hinestroza, noting that Americans throw away anywhere from 80 to 100 pounds of clothing per person annually.

Droplets of (left-to-right) soda, water, orange juice, sports drink and milk are shown on a piece fabric with (top) and without (bottom) a UiO-66 metal-organic framework superhydrophobic coating, developed in the lab of Juan Hinestroza of the College of Human Ecology.

The metal-organic framework (MOF) used in the group’s coating can be synthesized at room temperature, using more environmentally friendly solvents (water and ethanol) and can be achieved without separation or purification of the discarded textiles, both energy-intensive processes.

Yelin Ko, a doctoral student in the field of fiber science, is the first author of “UiO-66 Inspired Superhydrophobic Coatings Fabricated from Discarded Polyester/Spandex Textiles,” which published Sept. 21 in ACS Applied Materials and Interfaces. Hinestroza is senior author; Tamer Uyar, associate professor of fiber science in the Department of Human Centered Design (CHE), is the other co-author.

This research is an extension of work published in 2023 demonstrating that old clothing could be chemically broken down to reuse polyester compounds to create MOF particles with potential applications in fire resistance, anti-bacterial properties, or wrinkle resistance. The new work is taking this proof of concept and applying it in a direct way.

In this work, metal-organic frameworks – unique structures pioneered in the 1990s by chemist Omar Yaghi, with whom Hinestroza collaborated on a Department of Defense grant in the late 2000s – were synthesized by chemically decomposing discarded polyester textiles into a heterogenous soup containing molecules of polyester and its monomers, dyes, additives and dirt usually associated with used clothes.

The researchers exposed discarded fabrics to an alkaline depolymerization process to produce disodium terephthalate, a known linker for synthesis of UiO-66, a popular MOF. They conducted experiments using different amounts of ethanol, and found that with a small amount of ethanol, UiO-66 assembled on top of a polyester and spandex substrate, exhibited superhydrophobic behavior.

The fragments of spandex, the group found, modified the otherwise hydrophilic MOF structure and made it hydrophobic. What’s more, the UiO-66 material was subjected to repeated washing and abrasion, and maintained its water resistance.

The group said this technology is one way to reduce the world’s reliance on harmful chemicals in textile manufacturing.

“We must find alternatives to fluorinated finishes, also known as ‘forever chemicals,’” Uyar said. “This study demonstrates how we can achieve functional finishes, including water-repellent and self-cleaning properties, by upcycling textile waste instead of relying on ‘forever chemicals.’”

The “upcycling” aspect of this work is what’s most important, Hinestroza said.

“It’s very easy to blame the brands or blame the producers, but in the end, they will not produce if you don’t consume,” he said. “And whatever is not being consumed is thrown away. And we want to believe that the problem ends in our garbage cans, but it doesn’t.”

This research utilized the Cornell Center for Materials Research Shared Facilities, which are supported by the National Science Foundation. Other support came from the Fulbright U.S. Student Program, which is sponsored by the U.S. Department of State and the Korean-American Educational Commission.

CARBIOS, a pioneer in the development and industrialization of biological technologies to reinvent the life cycle of plastic and textiles, and SELENIS, a leading supplier of high-quality specialty polyester solutions, have signed a Letter of Intent to cooperate in the production of PETG. By leveraging CARBIOS’ enzymatic depolymerization technology and Selenis’ expertise in polymerization, the companies aim to develop a premium, sustainable PETG material made from PET waste for the Cosmetic and Healthcare packaging sectors across Europe and the U.S. This partnership follows a two-year collaboration between the two companies and represents a significant advancement in the plastic recycling industry.

PETG is an indispensable packaging material in both the cosmetics and healthcare industries due to its exceptional clarity, durability, mechanical and chemical resistance. CARBIOS’ enzymatic depolymerization solution breaks down all types of PET waste into PTA and MEG monomers, which are then transformed into PETG through Selenis’ advanced polymerization processes. Thanks to the purity of these monomers, PETG issued from biorecycling presents the same properties as virgin PETG, allowing for products packaged in thick, molded pots and lids to be protected and presented attractively. In the medical and pharmaceutical industries, PETG properties are also critical for guaranteeing top packaging performance, sterility, transparency and optical brightness, making it an ideal choice for complex medical device packaging, pharmaceuticals blisters, or any other packaging of diagnostic equipment. The material’s value is therefore further underscored by combining a sustainable recycling solution whilst guaranteeing all needed properties, aligning with consumer sustainability demands and stringent regulatory requirements.

CARBIOS and Selenis’ partnership is the result of extensive pilot and industrial polymerization trials that have refined the quality of the end product. The result is high-specialty PETG grades issued from biorecycling that meet the strict requirements of sectors like cosmetics and healthcare, where Selenis has a strong presence through its Selcare brand.

• CARBIOS, L’OCCITANE en Provence and Pinard Beauty Pack join forces to establish an efficient European value chain for PET circularity
• The 100% biorecycled transparent bottle (from enzymatic recycling) will be on display at CARBIOS’ booth D02 at “Edition Spéciale” by LuxePack, held 4-5 June at the Carreau du Temple in Paris
• A key step towards achieving L'OCCITANE en Provence's eco-design commitment of 100% retail bottles made from 100% post-consumer recycled PET by 2027

CARBIOS and L’OCCITANE en Provence, an international cosmetics brand using natural and organic ingredients and long-term partner of CARBIOS, present a bottle in transparent PET made entirely from enzymatic recycling for a shower oil from the Amande range. In collaboration with converter Pinard Beauty Pack, this bottle exemplifies a shared desire to build en efficient European recycling sector to accelerate the transition to a circular economy for plastic, and meet brands' commitments for more sustainable packaging solutions. The bottle will be on display at CARBIOS’ Stand D02 at “Edition Spéciale” by LuxePack, the trade show dedicated to sustainable premium packaging, to be held on 4-5 June 2024 at the Carreau du Temple in Paris.

The 100% recycled PET bottle from CARBIOS' enzymatic depolymerization process was made with a European value chain committed to responsible consumption of sustainable materials. The bottle’s production began with the local supply of PET waste (already collected, sorted and prepared) to the CARBIOS industrial demonstrator in Clermont-Ferrand, France. The waste used consisted of colored bottles, multilayer trays and mechanical recycling residues, none of which are currently recycled using conventional technologies. CARBIOS deconstructed the PET waste into its original monomers, PTA and MEG, using its biorecycling technology. The resulting monomers were then repolymerized into new, fully recycled PET resins within Europe. In Oyonnax, France, these resins were blow-molded by Pinard Beauty Pack to create bottles according to L’OCCITANE’s specifications, and then filled with its shower oil at its Manosque plant.

Archroma will introduce its new Super Systems+ concept and highlight product innovations at Techtextil 2024, being held in Frankfurt, Germany from April 23 to 26.

A highlight of Archroma’s participation in Techtextil, Super Systems+ are powerful end-to-end systems that combine fiber-specific processing solutions and intelligent effects. The Super Systems+ suite encompasses wet processing solutions that deliver measurable environmental impact from sizing to finishing; durable colors and functional effects that add value and longevity to the end product; and cleaner chemistries that eliminate harmful or regulated substances.

For textile partners to the automotive industry, Archroma is introducing DOROSPERS® KHF, a new range of high-lightfast disperse dyes that provide optimum build up on polyester microfiber, including artificial suede for car interiors.

For nonwoven applications in fields such as healthcare, hygiene and filtration, Archroma recommends APPRETAN® FFX6750, a new addition to its range of high-performance zero-formaldehyde acrylic copolymers, and APPRETAN® FFX1540.

APPRETAN® FFX1540 is a new APEO free and formaldehyde free self-crosslinking polymer, medium soft with very low tackiness, and strongly hydrophobic, developed for the chemical bonding of nonwovens and for the coating of technical textiles, where low water absorption and high-water tightness are required, combined with high durability in severe environment.

For workwear and uniforms that protect people under adverse conditions, Archroma solutions include HELIZARIN® ULTRA-FAST, for printing with pigment dispersions and metallic pigments, and the new ALBAFIX® ECO Plus wet fastness improver. Archroma’s PFC-free PHOBOTEX® R-ACE durable water repellent delivers excellent water repellence while preserving fabric quality and ensuring sustainability. Archroma has also expanded the revolutionary AVITERA® SE GENERATION NEXT range of resource-saving dyes with new colors.

Further solutions for active wear and workwear include the newly launched bio-based PHOBOTEX® NTR-50 durable water repellent product, which is PFAS free, formaldehyde free and crosslinker free, as well NYLOFIXAN® HFS, a new fixing agent for polyamide and blends that is fully compliant with the latest restrictions on bisphenol compounds.

Archroma is also launching ARKOPHOB® NTR-40 at Techtextil 2024. The company’s first crosslinker with an improved sustainability profile, its monomers are partially derived from renewably sourced, plant-based raw materials. Another new innovation is biocide-free OX20, an odor-neutralizing technology launched by Archroma in partnership with SANITIZED AG.

For home textiles, mills and brands can select ARKOFIX® NZW formaldehyde-free* resin for high whiteness and extraordinary product stability, with no yellowing during storage at elevated temperatures, even over a prolonged period of time. For a super-soft handle, the SILIGEN® EH1 is a vegan silicone macro-emulsion softener with 35% plant-based active content.

CARBIOS, a pioneer in the development and industrialization of biological technologies to reinvent the life cycle of plastic and textiles, has received an initial payment of €1.2 million from the French Agency for Ecological Transition (ADEME) for the OPTI-ZYME research project, carried out in partnership with INRAE2, INSA3 and CNRS4 via the TWB5 joint service and TBI6 research units, a project co-funded by the French State as part of France 2030 operated by ADEME. With CARBIOS' aim to optimize and continuously improve its unique enzymatic PET depolymerization technology, the 4-year7 OPTI-ZYME project aims to investigate the scientific and technical levers for improving the competitiveness of the process, optimizing the necessary investments and reducing its environmental footprint.

This collaborative R&D program focuses on the technical and economic optimization of process stages, while preserving the quality of the monomers obtained. These optimizations, new developments and the exploration of innovative solutions should enhance the technology's flexibility with regards to incoming waste. Raw materials could come from different sources that are currently rarely or not recycled, notably food trays and textiles, or a mix of incoming materials. It also aims to limit input and water consumption, as well as regenerate or reduce co-products and ultimate residual waste. Finally, it seeks to support enzyme optimization to maximize the process’ economic profitability and competitiveness.

The project therefore aims to achieve an overall improvement in performance, combining efficiency, quality and environmental sustainability, to benefit the Longlaville plant which is currently under construction, and future licensed plants.

In May 2023, CARBIOS, the project leader and coordinator, announced that it had been awarded a total of €11.4M in funding by the French State as part of France 2030, operated by ADEME, including €8.2M directly for CARBIOS (€3.2M in grants and €5M in repayable advances) and €3.2M for its academic partners INRAE, INSA and CNRS (via the TWB mixed service and TBI research units). This funding, which is made up of grants and repayable advances, will be paid out in several instalments over the course of the project, including an initial instalment of 15%, equivalent to €1.2 million, received by CARBIOS on 5 December 2023. The first Monitoring Committee with ADEME for the first key stage of the project will be held in February 2024 to validate the granting of the second instalment of funding.

This project 2282D0513-A is funded by the French State as part of France 2030 operated by ADEME.

Carbios and L’Oréal have won the “Pioneer Awards” in the Industry category, presented by the Solar Impulse Foundation at the first World Alliance Summit. This prize was awarded to Carbios for its enzymatic PET recycling solution, labeled “Efficient Solution” by the Solar Impulse Foundation since 2019, and to L’Oréal for using this technology for the first time in a cosmetics bottle prototype. Carbios’ solution offers brands an alternative to petro-sourced plastic that helps them meet their sustainability commitments. This advancement paves the way for future applications in other sectors such as packaging, food and beverage, and textiles.

Carbios and L’Oréal: a long-term collaboration
Since 2017, Carbios and L’Oréal have been working together with a shared vision of accelerating the transition to a circular economy for plastic. In 2017, both companies created a Consortium to improve the recyclability and circularity of PET packaging.  Nestlé Waters, PepsiCo and Suntory Beverage & Food Europe joined this Consortium in 2019 to scale up Carbios’ innovation. The world’s first enzymatically recycled PET packaging was made in 2021 using Carbios’ biorecycling process. The world’s first PET biorecycling plant is scheduled to be commissioned in 2025. In parallel, Carbios is rolling out its technology internationally through licensing agreements.

The environmental benefits of biorecycling developed by Carbios
Recent life-cycle analyses^[1] show a 57% reduction in CO₂ emissions compared with the production of virgin plastic^[2], and for every tonne of recycled PET produced, 1.3 tonnes of petrol are avoided. Compared with conventional recycling, enzymatic recycling is 4 times more circular (calculated according to the Ellen MacArthur Foundation’s Material Circularity Indicator). Thanks to its highly selective enzyme, optimized for efficient PET degradation, Carbios’ depolymerization process can process all types of PET waste, including colored, multilayer or textile waste that cannot be recycled using current technologies. Furthermore, the two monomers produced (PTA and MEG) make it possible to recreate recycled PET products of identical quality to virgin ones, and suitable for food contact.
 
 
^[1] Database ecoinvent 3.8
^[2] French scenario, taking into account the detour of 50% of PET waste from conventional end-of-life. Virgin PET: 2.53 kg CO₂/kg (cradle to gate)

To reach its goal of being the world’s leading supplier of enhanced recycled polyethylene terephthalate (PET), gr3n is signing a binding Memorandum of Understanding (MOU) with its shareholder Intecsa Industrial to set up a Joint Venture.

gr3n together with Intecsa Industrial will join forces and build a “First-of-a-Kind” manufacturing facility able to produce 40.000 tons of virgin-like PET, commencing EPC phase in Q4-2024 and aiming to be operational in 2027. gr3n’s chemical recycling technology is capable of processing PET from various industries including textile waste, closing the loop for hard-to-recycle PET applications.

The world’s first industrial-scale MADE PET recycling plant will have the capability to process post-industrial and post-consumer PET waste including hard-to-recycle waste, to produce approximately 40.000 tons of virgin PET chips from the recycled monomers saving nearly 2 million tons of CO2 during its operating life. The post-consumer and/or post-industrial polyesters will be both from bottles (colored, colorless, transparent, opaque) and textiles (100% polyester but also mixtures of other materials like PU, cotton, polyether, polyurea, etc. with up to 30% of presence in the raw textile).

The technical concept of the MADE plant is to break down PET into its main components (monomers) so they can potentially be re-polymerized endlessly to provide brand new virgin PET or any other polymer using one of the monomers. Polymers obtained can be used to produce new bottles/trays and/or new garments, essentially completely displacing feedstock material from fossil fuels, as the recycled product has the same functionality as that derived traditionally. This means that gr3n can potentially achieve bottle-to-textile, textile-to-textile, or even textile-to-bottle recycling, moving from a linear to a circular system.

gr3n’s process has the potential to change the way PET is recycled worldwide, enabling huge benefits for both the recycling industry and the entire polyester value chain. Many efforts have been made in the past to transfer enhanced recycling from research laboratories to the manufacturing industry, but the economics and skepticism of the first adopters have constantly blocked the progress of the proposed solutions. Thanks to the MADE technology developed by gr3n, this approach is now feasible and makes gr3n one of the few companies with the potential to provide a reliable enhanced recycling solution that closes the life cycle of PET, and also offers food grade polymer material, processes a large variety of waste and reduces the carbon footprint of these materials usually destined for incineration or landfill.

• An innovative European project to process and recycle plastic textile waste
• A partnership to reach the objectives set by the European Union in reducing CO2 emissions by 2030
• A unique consortium rallying 16 public and private European organizations working together for more circular economy

Carbios joined WhiteCycle, a project coordinated by Michelin, which was launched in July 2022. Its main goal is to develop a circular solution to convert complex^[1] waste containing textile made of plastic into products with high added value. Co-funded by Horizon Europe, the European Union’s research and innovation program, this unprecedented public/private European partnership includes 16 organizations and will run for four years.
 
WhiteCycle envisions that by 2030 the uptake and deployment of its circular solution will lead to the annual recycling of more than 2 million tons of the third most widely used plastic in the world, PET^[2]. This project should prevent landfilling or incineration of more than 1.8 million tons of that plastic each year. Also, it should enable reduction of CO2 emissions by around 2 million tons.
 
Complex waste containing textile (PET) from end-of-life tyres, hoses and multilayer clothes are currently difficult to recycle, but could soon become recyclable thanks to the project outcomes. Raw material from PET plastic waste could go back into creation of high-performance products, through a circular and viable value chain.
 
Public and private European organizations are combining their scientific and industrial expertises:

• industrial partners (Michelin, Mandals, KORDSA);
• cross-sector partnership (Inditex)
• waste management companies (Synergies TLC, ESTATO);
• intelligent monitoring systems for sorting (IRIS);
• biological recycling SME (Carbios);
• product life cycle analysis company (IPOINT);
• university, expert in FAIR data management (HVL);
• universities, research and technology organizations (PPRIME – Université de Poitiers/CNRS, DITF, IFTH, ERASME);
• industry cluster (Axelera);
• project management consulting company (Dynergie).

 
The consortium will develop new processes required throughout the industrial value chain:

• Innovative sorting technologies, to enable significant increase of the PET plastic content of complex waste streams in order to better process them;
• A pre-treatment for recuperated PET plastic content, followed by a breakthrough recycling enzyme-based process to decompose it into pure monomers in a sustainable way;
• Repolymerization of the recycled monomers into like new plastic;
• Fabrication and quality verification of the new products made of recycled plastic materials

 
WhiteCycle has a global budget of nearly 9.6 million euros and receives European funding in the amount of nearly 7.1 million euros. The consortium’s partners are based in five countries (France, Spain, Germany, Norway and Turkey). Coordinated by Michelin, it has an effective governance system involving a steering committee, an advisory board and a technical support committee.

^[1] Complex waste: multi materials waste (Rubber goods composites and multi-layer textile)
^[2] PET: Polyethylene terephthalate

Belgian textile innovator Devan Chemicals was lauded by Frost & Sullivan for its antimicrobial technology with proven quaternized silane chemistry, known under its trade name as BI-OME®.

RONSE, BELGIUM – The non-leaching attributes of the technology coupled with its ability to reduce microbial mutation make it a potential candidate for textiles where durability and safe human contact are highly valued.

Based on its recent analysis of the European antimicrobial technology for the textile market, Frost & Sullivan recognizes the Belgium-headquartered Devan Chemicals NV (Devan) with the 2020 European Technology Innovation Leadership Award. Devan’s highly relevant antimicrobial technology addresses issues concerning the contamination of PPE and textiles, including the spread of drug-resistant bacteria, viral transmissions, and hospital-acquired infections (HAIs). Its quat-silane technology, due to its non-migrating behaviour, physically punctures the microorganism cell to destroy it without interfering with cell DNA. Notably, it eliminates the adverse effects of leaching antimicrobials while providing high efficiency in the range of 99.9 percent to 99.99 percent, even after multiple washes.

"By providing non-migrating antimicrobial technology for the textile industry, Devan plugs the safety and performance gaps inherent in current inorganic and organic antimicrobial agents. Its antimicrobial technology, unlike silver- or triclosan-based technology, comprises non-migrating monomers and prepolymers such as organo-functional silane," said Monami Dey, Industry Manager, Frost & Sullivan. "The organo-silane polymers are covalently bonded and polymerized to the textile surface as a coating via padding, exhaust, and spraying techniques. The coating forms a non-leaching reactive surface and destroys the microbes on contact, without releasing harmful components into the environment."

Devan CEO Sven Ghyselinck is very happy with the award: “The best practice award is a nice recognition of the hard work we did in the last 6 months to evaluate the performance against viral activity. It’s great to see our efforts didn’t go unnoticed.”

Earlier this month Devan published new test results confirming the high performance virus-reducing capabilities of its BI-OME fabric coating technology on both unwashed and intensely washed fabrics. The Belgian company has worked closely with a series of international third party laboratories to test different fabric substrates against a wide range of enveloped viruses. Before washing, samples treated with Devan BI-OME score very good to excellent (99% and higher according to ISO 18184) results on virus reduction. Different substrates, like polyester, cotton and polycottons, were exposed to enveloped viruses like SARS-COV-2 (known to cause COVID-19), Feline Corona, Vaccinia (the EU standard for enveloped viruses) and Porcine Respiratory viruses. After 30minutes, BI-OME already reduced 99.96% of the activity of SARS-COV-2.

After washing, a decrease in virus reduction performance of coating technologies is normal and expected. However, BI-OME is confirmed to deliver only a minimal reduction, retaining up to 98.5% virus reduction even when the fabric is washed 25 times.

"Devan is working towards sustainability and green chemistry. For instance, its technology does not contain any harmful solvents such as formaldehyde or polychlorinated phenols and fulfills the regulatory obligations of the EU BPR," noted Dey. "Its commitment to promoting sustainability in textile finishes with a strong focus on GMO-free, kosher, as well as halal certifications, and recyclability has given the company an edge in launching new products at an accelerated pace to match customers’ most pressing concerns and demands."

One of those innovations is BI-OME NTL (natural), a natural, bio-based antimicrobial solution that guarantees an optimal freshness and hygiene for textiles. The active ingredient is the well-known Linseed oil, obtained from the dried, ripened seeds of the flax plant. The active ingredients in BI-OME NTL are GMO free, Halal, Kosher and recyclable.