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DITF: Lignin coating for Geotextiles Photo: DITF
Coating process of a cellulose-based nonwoven with the lignin compound using thermoplastic processing methods on a continuous coating line.
27.10.2023

DITF: Lignin coating for Geotextiles

Textiles are a given in civil engineering: they stabilize water protection dams, prevent runoff containing pollutants from landfills, facilitate the revegetation of slopes at risk of erosion, and even make asphalt layers of roads thinner. Until now, textiles made of highly resistant synthetic fibers have been used for this purpose, which have a very long lifetime. For some applications, however, it would not only be sufficient but even desirable for the auxiliary textile to degrade in the soil when it has done its job. Environmentally friendly natural fibers, on the other hand, often decompose too quickly. The German Institutes of Textile and Fiber Research Denkendorf (DITF) are developing a bio-based protective coating that extends their service life.

Textiles are a given in civil engineering: they stabilize water protection dams, prevent runoff containing pollutants from landfills, facilitate the revegetation of slopes at risk of erosion, and even make asphalt layers of roads thinner. Until now, textiles made of highly resistant synthetic fibers have been used for this purpose, which have a very long lifetime. For some applications, however, it would not only be sufficient but even desirable for the auxiliary textile to degrade in the soil when it has done its job. Environmentally friendly natural fibers, on the other hand, often decompose too quickly. The German Institutes of Textile and Fiber Research Denkendorf (DITF) are developing a bio-based protective coating that extends their service life.

Depending on humidity and temperature, natural fiber materials can degrade in the soil in a matter of months or even a few days. In order to significantly extend the degradation time and make them suitable for geotextiles, the Denkendorf team researches a protective coating. This coating, based on lignin, is itself biodegradable and does not generate microplastics in the soil. Lignin is indeed biodegradable, but this degradation takes a very long time in nature.

Together with cellulose, Lignin forms the building materials for wood and is the "glue" in wood that holds this composite material together. In paper production, usually only the cellulose is used, so lignin is produced in large quantities as a waste material. So-called kraft lignin remains as a fusible material. Textile production can deal well with thermoplastic materials. All in all, this is a good prerequisite for taking a closer look at lignin as a protective coating for geotextiles.

Lignin is brittle by nature. Therefore, it is necessary to blend the kraft lignin with softer biomaterials. These new biopolymer compounds of brittle kraft lignin and softer biopolymers were applied to yarns and textile surfaces in the research project via adapted coating systems. For this purpose, for example, cotton yarns were coated with lignin at different application rates and evaluated. Biodegradation testing was carried out using soil burial tests both in a climatic chamber with temperature and humidity defined precisely according to the standard and outdoors under real environmental conditions. With positive results: the service life of textiles made of natural fibers can be extended by many factors with a lignin coating: The thicker the protective coating, the longer the protection lasts. In the outdoor tests, the lignin coating was still completely intact even after about 160 days of burial.

Textile materials coated with lignin enable sustainable applications. For example, they have an adjustable and sufficiently long service life for certain geotextile applications. In addition, they are still biodegradable and can replace previously used synthetic materials in some applications, such as revegetation of trench and stream banks.

Thus, lignin-coated textiles have the potential to significantly reduce the carbon footprint: They reduce dependence on petroleum-based products and avoid the formation of microplastics in the soil.

Further research is needed to establish lignin, which was previously a waste material, as a new valuable material in industrial manufacturing processes in the textile industry.

The research work was supported by the Baden-Württemberg Ministry of Food, Rural Areas and Consumer Protection as part of the Baden-Württemberg State Strategy for a Sustainable Bioeconomy.

Source:

Deutsche Institute für Textil- und Faserforschung Denkendorf (DITF)

Visionary building – with composite textiles by vombaur (c)vombaur
From the H-profile to the chamber structure – vombaur offers individually developed composite textiles with complex shapes
13.10.2021

Visionary building – with composite textiles by vombaur

  • Hightech textiles for future-oriented construction projects

Building shells, bridges, staircases, façades ... construction projects are exposed to enormous mechanical loads. Often there are also considerable climatic or environmental influences. This has prompted the increasing use of fibre-reinforced materials in construction projects. After all, besides many other exciting properties, they offer high mechanical rigidity, low weight and excellent corrosion resistance.

Tapes, tubulars, sections and 3D woven textiles by vombaur form the perfect basis for these innovative building materials. The seamless round or shaped woven narrow textiles made of high-performance fibres are extremely loadable because they have neither seams nor welds – and therefore no undesirable breaking points. Their surface properties are identical over the entire length. In challenging tasks, composite textiles by vombaur offer a lightweight solution that is as reliable as it is durable.

  • Hightech textiles for future-oriented construction projects

Building shells, bridges, staircases, façades ... construction projects are exposed to enormous mechanical loads. Often there are also considerable climatic or environmental influences. This has prompted the increasing use of fibre-reinforced materials in construction projects. After all, besides many other exciting properties, they offer high mechanical rigidity, low weight and excellent corrosion resistance.

Tapes, tubulars, sections and 3D woven textiles by vombaur form the perfect basis for these innovative building materials. The seamless round or shaped woven narrow textiles made of high-performance fibres are extremely loadable because they have neither seams nor welds – and therefore no undesirable breaking points. Their surface properties are identical over the entire length. In challenging tasks, composite textiles by vombaur offer a lightweight solution that is as reliable as it is durable.

Safe and durable solutions for challenging applications
The potential applications for lightweight components in the construction industry are as numerous as the project ideas of the planning and construction teams.
•    Ropes and tensioning elements made of carbon fibre reinforced plastic (CFRP)
•    Reinforcement of building structures made of concrete, steel, wood or other materials
•    Sustainable restructuring of constructions and urban districts for bridges and buildings
•    CFC slats as reinforcements in case of repairs
•    (Filled) GRP pipes made of seamless round woven tubes by vombaur as columns/pillars
•    CFRP sections as steel girder substitutes
•    Hollow profiles with individually designed cross-sections
•    Glass fibre reinforced connecting elements for glazing to minimise expansion differences between the connecting element and the glass
•    Individual light wells

Implementing visions – with composite textiles by vombaur
As your development partner, vombaur facilitates innovative composites projects for challenging applications. In innovative and safety-sensitive industries such as automotive and aviation, chemical and plant engineering.  The composites experts at vombaur develop, create samples of and manufacture woven tapes and seamless round or shaped woven textiles by vombaur – in collaboration with the customer's enterprise development teams and individually for the respective projects. This is how novel and unique lightweight components made of high-performance textiles are created for visionary lightweight construction projects.

"Fibre-reinforced composites are the ideal material for future-oriented construction projects," explains Dr.-Ing. Sven Schöfer, Head of Development and Innovation at vombaur. "Their outstanding technical properties and design possibilities open up new and fascinating perspectives for construction projects. From building construction to civil engineering, from bridge construction to interior design. As an experienced development partner for sophisticated lightweight components, we at vombaur contribute our seamless solutions to these kinds of future-oriented projects."

More information:
vombaur Composites carbon fibers
Source:

vombaur GmbH & Co. KG

Start of 3-years Interreg cross-border project AACOMA  is kicked-off (c) AMAC GmbH
AMAC-Standortkarte
13.05.2020

Start of 3-years Interreg cross-border project AACOMA is kicked-off

  • AACOMA - Accelerate advanced composite manufacturing
  • EMR Region Belgium, the Netherlands & Germany area hot spot for the future of lightweight materials and technologies

The Euregio Meuse-Rhine provides a huge potential with its many highly innovative, leading companies and especially SMEs which are active in the area of advanced material manufacturing in many industrial sectors, such as Automotive, Aerospace, Electronics, Building and Infrastructure, etc. The advanced material sector is growing, with a consolidated offer, ranging from raw material producers over technology development to production, research and development as well as industrial OEMs.

Interreg Euregio Meuse-Rhine invests EUR 96 million from the European Regional Development Fund (ERDF) in the period 2014-2020. Through the investments in cross-border projects, the European Union invests in the economic development, innovation, territorial development and social inclusion and education of this region.

Project

  • AACOMA - Accelerate advanced composite manufacturing
  • EMR Region Belgium, the Netherlands & Germany area hot spot for the future of lightweight materials and technologies

The Euregio Meuse-Rhine provides a huge potential with its many highly innovative, leading companies and especially SMEs which are active in the area of advanced material manufacturing in many industrial sectors, such as Automotive, Aerospace, Electronics, Building and Infrastructure, etc. The advanced material sector is growing, with a consolidated offer, ranging from raw material producers over technology development to production, research and development as well as industrial OEMs.

Interreg Euregio Meuse-Rhine invests EUR 96 million from the European Regional Development Fund (ERDF) in the period 2014-2020. Through the investments in cross-border projects, the European Union invests in the economic development, innovation, territorial development and social inclusion and education of this region.

Project

The Euregio Meuse-Rhine is a potential hot-spot for the further development of advanced material and process technologies. Technical Centers and Institutes around Aachen/Germany, Liège/Belgium and Eindhoven/The Netherlands were awarded with this new project AACOMA.

Innovative material design and advanced manufacturing provide large opportunities for SMEs. The AACOMA project kick-off took place in Aachen at the Campus of the RWTH University of technology in 1 Q 2020. The aim of the project, which is running for 3 years until 2023 with a budget of €3 Mio, is to connect SMEs with innovation hot-spots like institutes and technical centers.
Seven partners from all three regions will carry the project out: Centexbel is the project leader and gets support by University of Liège, Sirris and Flanders Make from Belgium, as well as Fontys University of Applied Science and AMIBM of Maastricht University in the Netherlands and AMAC in Germany.

Statements

Bernard Paquet, Project Coordinator from Centexbel/ Belgium stated:
“Centexbel, with a strong experience in textile and composites, will identify with its Interreg partners and an advisory board of international experts several demonstrators which will enable an accelerated advanced manufacturing of composite parts. This could include new materials and intermediates, high performance additives, bio-based products and new composites by additive manufacturing”.

Michael Effing, Managing Director of AMAC/ Germany said:
“The major goal of the project is to connect around 200 innovative SMEs with each other and establish the links to the world-class institutes in the EMR region. We will facilitate 6 roadshow events, addressing key topics like automated manufacturing, additive manufacturing or bio-based material systems combined with match making and training events. The first roadshow will be held on September 24, 2020 at the Aachen Campus of the RWTH University of Technology.”

Prof. Gunnar Seide from the AMIBM/The Netherlands continued:  
“Our AMIBM offers already an international master program on bio-based materials. The AACOMA project will be an important element for transborder research and will identify new players in the value chain coming from the EMR region. Innovative companies find markets for their new bio-based building blocks, chemicals and polymers. Their success stories and upcoming technological breakthroughs are needed for a sustainable future.”

 

27.11.2017

AZL is building on the success of the study on Composites in Buildings & Infrastructure

The AZL will continue its collaboration on composites in buildings and infrastructure after completing an initial market and technology study which identified new potentials for composite technologies in buildings and infrastructure markets. The aim of the new AZL Workgroup which will meet for the first time on January 25th, 2018 is to jointly develop new applications and to support the business development for composites in these two growing markets. The meeting is open to interested companies from the composite industry as well as the building and infrastructure markets.


The aim of the initial workgroup meeting will be to turn insights from the study into a long-term workgroup collaboration and to define topics and initiatives for the joint cooperation in the field of process and manufacturing technologies, fire safety regulations, materials as well as standards and norms. Industrial keynote presentations will introduce these action fields and will provide an insight into building and infrastructure applications for composites. The meeting will furthermore provide a platform to network with companies along the entire composite value chain.

The AZL will continue its collaboration on composites in buildings and infrastructure after completing an initial market and technology study which identified new potentials for composite technologies in buildings and infrastructure markets. The aim of the new AZL Workgroup which will meet for the first time on January 25th, 2018 is to jointly develop new applications and to support the business development for composites in these two growing markets. The meeting is open to interested companies from the composite industry as well as the building and infrastructure markets.


The aim of the initial workgroup meeting will be to turn insights from the study into a long-term workgroup collaboration and to define topics and initiatives for the joint cooperation in the field of process and manufacturing technologies, fire safety regulations, materials as well as standards and norms. Industrial keynote presentations will introduce these action fields and will provide an insight into building and infrastructure applications for composites. The meeting will furthermore provide a platform to network with companies along the entire composite value chain.


Dr. Amer Affan, CEO and founder of AFFAN Innovative Structures based in Dubai is in charge of various composite projects for buildings such as the Museum of the Future in Dubai: “We have been utilizing structural composites in construction since 2010. Composites is a truly high-tech material compared with the traditional building materials (steel, concrete, timber and aluminum) but it is still to be recognized as such in the conservative and price-sensitive building industry. AZL, particularly its location at the RWTH Aachen University and its partner companies, offers a good platform to progress the use of composites in construction.”


AZL together with more than 25 companies just completed the Joint Market and Technology Study on “New Potentials for Composite Technologies in Buildings and Infrastructure” establishing a broad knowledge on business opportunities for composite technologies in these two growing markets. In a structured approach, the study determined the key segments as well as the technologies/applications with the highest market and technological potential. Analyses of 20 market segments, investigation of 438 applications, technology analyses of 25 highlight components and 11 detailed business cases were elaborated throughout the study. Additional to requirement analyses for materials and production technologies, new concepts for efficient profitable production technologies and cost engineering analysis were developed. With the workgroup, the AZL will take this initiative a step further with the aim to build a long-term cooperation platform for composites in buildings and infrastructure markets.


Justin Jin, CEO of the Korean company AXIA Materials participated in the study and is part of the AZL Partner Network: “As producer of large thermoplastic composite sheets and composite SIP (Structural Insulated Panel), we are eager to drive composites in B&I applications with the best efficient way. The AZL study on Buildings and Infrastructure provided us a great networking with key players in this business field and opportunities to strengthen our products with the key elements from partners. The study also gave us a proper market understanding including market size/volume in numbers to prove the value of this technology to building industry. We are looking forward to following up on these first insights and to realize applications with the AZL and its partners.”


Besides the networking options, the meeting will offer the opportunity to get an insight into the activities of the AZL Network consisting of nine research institutes at the RWTH Aachen Campus and more than 80 companies from 21 countries. During an optional guided tour, participants will visit selected institutes at the RWTH Aachen Campus. The meeting is open to all interested companies and free of charge.

More Information on Meeting and the Study
Information on AZL activities in the field of buildings and infrastructure:
www.azl-lightweight-production.com/composites-buildings-infrastructure
Details and registration to first Workgroup Meeting on January 25th, 2018:
http://www.azl-lightweight-production.com/termine/1st-workgroup-meeting-buildings-infrastructure