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DITF: CO2-negative construction with new composite material Photo: DITF
Structure of the wall element
20.03.2024

DITF: CO2-negative construction with new composite material

The DITF is leading the joint project "DACCUS-Pre*". The basic idea of the project is to develop a new building material that stores carbon in the long term and removes more CO2 from the atmosphere than is emitted during its production.       

In collaboration with the company TechnoCarbon Technologies, the project is now well advanced - a first demonstrator in the form of a house wall element has been realized. It consists of three materials: Natural stone, carbon fibers and biochar. Each component contributes in a different way to the negative CO2 balance of the material:

Two slabs of natural stone form the exposed walls of the wall element. The mechanical processing of the material, i.e. sawing in stone cutting machines, produces significant quantities of stone dust. This is very reactive due to its large specific surface area. Silicate weathering of the rock dust permanently binds a large amount of CO2 from the atmosphere.

The DITF is leading the joint project "DACCUS-Pre*". The basic idea of the project is to develop a new building material that stores carbon in the long term and removes more CO2 from the atmosphere than is emitted during its production.       

In collaboration with the company TechnoCarbon Technologies, the project is now well advanced - a first demonstrator in the form of a house wall element has been realized. It consists of three materials: Natural stone, carbon fibers and biochar. Each component contributes in a different way to the negative CO2 balance of the material:

Two slabs of natural stone form the exposed walls of the wall element. The mechanical processing of the material, i.e. sawing in stone cutting machines, produces significant quantities of stone dust. This is very reactive due to its large specific surface area. Silicate weathering of the rock dust permanently binds a large amount of CO2 from the atmosphere.

Carbon fibers in the form of technical fabrics reinforce the side walls of the wall elements. They absorb tensile forces and are intended to stabilize the building material in the same way as reinforcing steel in concrete. The carbon fibers used are bio-based, produced from biomass. Lignin-based carbon fibers, which have long been technically optimized at DITF Denkendorf, are particularly suitable for this application: They are inexpensive due to low raw material costs and have a high carbon yield. In addition, unlike reinforcing steel, they are not susceptible to oxidation and therefore last much longer. Although carbon fibers are more energy-intensive to produce than steel, as used in reinforced concrete, only a small amount is needed for use in building materials. As a result, the energy and CO2 balance is much better than for reinforced concrete. By using solar heat and biomass to produce the carbon fibers and the weathering of the stone dust, the CO2 balance of the new building material is actually negative, making it possible to construct CO2-negative buildings.

The third component of the new building material is biochar. This is used as a filler between the two rock slabs. The char acts as an effective insulating material. It is also a permanent source of CO2 storage, which plays a significant role in the CO2 balance of the entire wall element.

From a technical point of view, the already realized demonstrator, a wall element for structural engineering, is well developed. The natural stone used is a gabbro from India, which has a high-quality appearance and is suitable for high loads. This has been proven in load tests.  Bio-based carbon fibers serve as the top layer of the stone slabs. The biochar from Convoris GmbH is characterized by particularly good thermal insulation values.

The CO2 balance of a house wall made of the new material has been calculated and compared with that of conventional reinforced concrete. This results in a difference in the CO2 balance of 157 CO2 equivalents per square meter of house wall. A significant saving!

* (Methods for removing atmospheric carbon dioxide (Carbon Dioxide Removal) by Direct Air Carbon Capture, Utilization and Sustainable Storage after Use (DACCUS).

Source:

Deutsche Institute für Textil- und Faserforschung

Presentation of the certificate for 1st place in the business plan competition KEUR.NRW 2023 to the RWTH start-up SA-Dynamics; from left to right: Oliver Krischer (Minister for the Environment, Nature Conservation and Transport of the State of NRW), Sascha Schriever (SA-Dynamics); Maximilian Mohr (SA-Dynamics); Jens Hofer (SA-Dynamics); Christian Schwotzer (SA-Dynamics) © Business Angels Deutschland e. V. (BAND)
Presentation of the certificate for 1st place in the business plan competition KEUR.NRW 2023 to the RWTH start-up SA-Dynamics; from left to right: Oliver Krischer (Minister for the Environment, Nature Conservation and Transport of the State of NRW), Sascha Schriever (SA-Dynamics); Maximilian Mohr (SA-Dynamics); Jens Hofer (SA-Dynamics); Christian Schwotzer (SA-Dynamics)
26.01.2024

Start-up: Bio-based aerogel fibres replace synthetic insulation materials

The Aachen-based start-up SA-Dynamics is developing sustainable, bio-based and biodegradable insulation materials made from aerogel fibres, thereby setting new standards in resource-saving construction. Dr Sascha Schriever (Institut für Textiltechnik ITA), Maximilian Mohr (ITA), Dr Jens Hofer (ITA Postdoc) and Dr Christian Schwotzer (Department for Industrial Furnaces and Heat Engineering IOB), who trained at RWTH Aachen University, were awarded first place in the KUER.NRW Business Plan Competition 2023 and prize money of €6,000.

SA-Dynamics relies on the impressive properties of aerogel fibres: they have excellent insulating properties, are lightweight, durable, robust, versatile and can be processed very well on conventional textile machines thanks to their flexibility. This makes them comparable to polystyrene, but still sustainable, as SA Dynamics uses bio-based and biodegradable raw materials.

The Aachen-based start-up SA-Dynamics is developing sustainable, bio-based and biodegradable insulation materials made from aerogel fibres, thereby setting new standards in resource-saving construction. Dr Sascha Schriever (Institut für Textiltechnik ITA), Maximilian Mohr (ITA), Dr Jens Hofer (ITA Postdoc) and Dr Christian Schwotzer (Department for Industrial Furnaces and Heat Engineering IOB), who trained at RWTH Aachen University, were awarded first place in the KUER.NRW Business Plan Competition 2023 and prize money of €6,000.

SA-Dynamics relies on the impressive properties of aerogel fibres: they have excellent insulating properties, are lightweight, durable, robust, versatile and can be processed very well on conventional textile machines thanks to their flexibility. This makes them comparable to polystyrene, but still sustainable, as SA Dynamics uses bio-based and biodegradable raw materials.

"We can revolutionise the construction world with bio-based aerogel fibres," explains ITA founder Dr Sascha Schriever proudly. "If all insulation materials in construction are converted to bio-based aerogel fibres, all builders can realise their dream of a sustainable house."

SA Dynamics has come a good deal closer to its founding goal by winning the KUER.NRW 2023 business plan competition. The spin-off from Institut für Textiltechnik (ITA) and Department for Industrial Furnaces and Heat Engineering (IOB) at RWTH Aachen University is scheduled for spring 2025.

Source:

ITA – Institut für Textiltechnik of RWTH Aachen University

Freudenberg´s comfortemp® FIBERBALL WB Series © Freudenberg Performance Materials
Freudenberg´s comfortemp® FIBERBALL WB Series
26.10.2023

Freudenberg launches sustainable, low-level BPA thermal insulation products

Freudenberg Performance Materials Apparel (Freudenberg) launches two advanced thermal insulation products made from low-level Bisphenol A (BPA) recycled PET fibers (rPET) into the global range of comfortemp®, Freudenberg’s thermal insulation brand.

The additions of DOWN FEEL WA 150LB and FIBERBALL WB 400LB to the comfortemp® global range serve as high-quality and ecologically-minded alternatives to down, enhancing the comfort and sustainability of your garments. DOWN FEEL WA 150LB is an extremely-lightweight, loose fiber thermal insulation with a super-light loft, while FIBERBALL WB 400LB uses clusters of extra-fine fibers to offer optimal breathability, maximum comfort, and minimal clumping after washing and drying.

Freudenberg Performance Materials Apparel (Freudenberg) launches two advanced thermal insulation products made from low-level Bisphenol A (BPA) recycled PET fibers (rPET) into the global range of comfortemp®, Freudenberg’s thermal insulation brand.

The additions of DOWN FEEL WA 150LB and FIBERBALL WB 400LB to the comfortemp® global range serve as high-quality and ecologically-minded alternatives to down, enhancing the comfort and sustainability of your garments. DOWN FEEL WA 150LB is an extremely-lightweight, loose fiber thermal insulation with a super-light loft, while FIBERBALL WB 400LB uses clusters of extra-fine fibers to offer optimal breathability, maximum comfort, and minimal clumping after washing and drying.

GRS-certified and OEKO-TEX® STANDARD 100 Class I certifications
Both products utilize 100% GRS-certified rPET fibers, customizable to any desired fill levels. Additionally, these new products not only comply with but significantly surpass the stringent OEKO-TEX® STANDARD 100 Class I certifications. While OEKO-TEX® categorizes low-level BPA as less than 100 parts per million (ppm), these new products contain less than 1 ppm BPA, a testament to Freudenberg’s unyielding standards.

DOWN FEEL WA 150LB and FIBERBALL WB 400LB are available globally and more low-level BPA thermal insulation options are available in Asia.

Source:

Freudenberg Performance Materials

comfortemp® nature Lyocell HO 60x Bild Freudenberg
comfortemp® nature Lyocell HO 60x
16.11.2022

Freudenberg presents sustainable product innovations at ISPO 2022

Freudenberg Performance Materials Apparel (Freudenberg) as a leading specialist in woven, knitted and non-woven interlinings and thermal insulation, presents sustainable solutions for sportswear and related product segments of all kinds in Munich.

Trade show visitors will experience a wide range of innovative and sustainable interlinings for active sports outfits, stretch interlinings for yoga wear, Pilates & Co, and thermal insulations that combine perfect outdoor wearing comfort with high warmth retention. With comfortemp® brand thermal insulations and the Active Range, Freudenberg presents a complete package for outdoor and sportswear for winter sports: thermal insulations, interlinings, tapes, lining fabrics and adhesive solutions.

Freudenberg Performance Materials Apparel (Freudenberg) as a leading specialist in woven, knitted and non-woven interlinings and thermal insulation, presents sustainable solutions for sportswear and related product segments of all kinds in Munich.

Trade show visitors will experience a wide range of innovative and sustainable interlinings for active sports outfits, stretch interlinings for yoga wear, Pilates & Co, and thermal insulations that combine perfect outdoor wearing comfort with high warmth retention. With comfortemp® brand thermal insulations and the Active Range, Freudenberg presents a complete package for outdoor and sportswear for winter sports: thermal insulations, interlinings, tapes, lining fabrics and adhesive solutions.

The independent jury has nominated the 100 percent biodegradable thermal insulation comfortemp® nature Lyocell HO 60x, made from Lyocell regenerated fibers, for the Textrends Award fall/winter 2024/25 season. The award is given exclusively to innovative products that are groundbreaking for the development of the textile industry. comfortemp® nature Lyocell HO 60x has a variety of extraordinary performance characteristics as a high warmth retention, bacteria inhibiting and fast drying, furthermore water repellent. High wearing comfort and the assurance of a perfect moisture balance characterize the volume fleece as ideal for the application in sportswear.

Freudenberg is presenting its entire European and global product portfolio from its "House of Sustainability" at ISPO. The "House of Sustainability" supports Freudenberg in minimizing its ecological footprint and maximizing its ecological handprint. For this purpose, the company's own manufacturing processes are designed to minimize the impact on the environment. In addition, products are developed to help customers produce more sustainably.

Source:

Freudenberg Performance Materials Holding SE & Co. KG