{"id":112655,"date":"2022-07-18T07:20:00","date_gmt":"2022-07-18T05:20:00","guid":{"rendered":"https:\/\/renewable-carbon.eu\/news\/?p=112655"},"modified":"2022-07-13T10:29:32","modified_gmt":"2022-07-13T08:29:32","slug":"biopolymers-from-wood-and-chitin-for-sustainable-textile-solutions","status":"publish","type":"post","link":"https:\/\/renewable-carbon.eu\/news\/biopolymers-from-wood-and-chitin-for-sustainable-textile-solutions\/","title":{"rendered":"Biopolymers from wood and chitin for sustainable textile solutions"},"content":{"rendered":"\n\n\n

In many areas, CO2 emissions can be reduced by replacing petroleum-based chemicals with products made from renewable raw materials. This protects the climate and the environment, and in many cases protects human and animal health.<\/p>\n\n\n\n

\"Adhesion
Adhesion of PA 66 on rubber: without adhesion promoter (left), with RFL dip (middle), with HMF dip (right)<\/figcaption><\/figure><\/div>\n\n\n\n

Chitosan-based finishing of textiles<\/strong><\/h3>\n\n\n\n

In textile finishing manufacturing processes, petroleum-based chemical auxiliaries can be replaced by products made from renewable raw materials. After cellulose, which is produced by plants, chitin is the raw material produced in very large quantities by animals. Chitin is found in crab shells, but also in the cuticle of insects or in fungi. Deacetylation turns chitin into the water-soluble chitosan. This in turn is a very good base material for finishing in the textile industry.<\/p>\n\n\n\n

Perfluorinated chemicals (PFCs) are currently used for water and oil-repellent (hydrophobic and oleophobic) finishing. The use of these perfluorinated compounds, although efficient, is ecologically questionable because PFCs are difficult to degrade, accumulate in the organism and are toxic. Textile finishing with PFCs is therefore increasingly the subject of negative debate, and a ban on these chemicals is conceivable in the foreseeable future. Chitosan is expected to partially replace them in the future. In research work with partners, chitosan is being modified to create new finishing formulations, whose wash resistance and hydrophobic properties were subsequently investigated and evaluated. In laboratory tests, textile fabrics finished with chitosan show a significant increase in hydrophobicity.<\/p>\n\n\n\n

The scientists at the German Institutes of Textile Research (DITF (Deutsche Institute f\u00fcr Textil- und Faserforschung)), Denkendorf\/Germany, are investigating further possible uses for chitosan, for example as a binder substitute in coatings for previously petroleum-based systems. The aim here is to achieve high wash resistance, hydrophobic or antibacterial properties, high abrasion resistance and flame protection. The use of chitosan increases the proportion of bio-based raw materials in textile finishing and promotes sustainable production for sustainable products.<\/p>\n\n\n\n

CO2-binding wood as a raw material for high-tech textiles<\/strong><\/h3>\n\n\n\n

In automotive manufacturing, biopolymers can also replace petroleum-based products and thus reduce CO2 emissions. However, the requirements for substitutes are particularly high here, as a long service life must be guaranteed under often harsh conditions. Up to now, in car tires, V-belts and conveyor belts, as well as in many other applications in the manufacture of technical products, rubber materials have been reinforced by high-strength fibers made of polyester (PET), polyamide (PA) or aramid. They provide the necessary strength and rigidity of the overall composite.
High adhesion between fibers and matrix is a prerequisite for the production of a high-quality composite system. This is ensured by so-called adhesion promoters. In the established manufacturing process, chemicals based on formaldehyde resorcinol latex (RFL) have proven their worth. They are applied to the fibers as so-called dips and ensure a stable bond between fibers and rubber. However, RFL has a significant disadvantage: since 2014, formaldehyde has been classified by the EU as demonstrably carcinogenic and mutagenic. At the DITF, it has been possible to replace formaldehyde with technically equivalent substances that are harmless to health. Here, too, natural starting materials form the basis.<\/p>\n\n\n\n

\"PA
PA 66 yarn with bonding agent made from HMF (SEM photo)<\/figcaption><\/figure><\/div>\n\n\n\n

The newly formulated, formaldehyde-free coating system is based on hydroxymethylfurfural (HMF), which can be obtained from wood. HMF is formed during the thermal decomposition of carbohydrates. It is found in many heat-treated foods and, according to current scientific knowledge, is considered harmless to health.<\/p>\n\n\n\n

The application of the newly developed coating system is simple. It is carried out under the same conditions and with the same technology that is used for the RFL dips. Thus, no additional investment is required for industrial production when the adhesion promoter is replaced.
In future development work, the resorcinol in the current dip formulation will be replaced by lignin, because resorcinol also has a human-toxic effect.<\/p>\n\n\n\n

Lignin is a waste material in paper production that is produced in large quantities during the extraction of pulp from wood and is thus a natural raw material that is chemically processed at the DITF into a technically advantageous adhesion promoter. Numerous research projects are looking at other possible uses. For example, a protective coating of lignin in thermoplastic coatings can ensure that natural fiber textiles last longer. In soil, lignin can be used to stabilize slopes and dams and in drainage. These reinforcement textiles are fully biodegradable after the desired service life.<\/p>\n\n\n\n

Research is also underway to modify lignin for processing in 3D printers for digital coating of textiles. In this way, this polymer from nature is processed into sustainable textile products using state-of-the-art technology.Acknowledgements<\/p>\n\n\n\n

Chitosan project: The research work is carried out in cooperation with the German textile companies Knopf’s Sohn GmbH & Co. KG, Helmbrechts, Hero Textil AG, Crailsheim, the textile auxiliary manufacturer Textilchemie Dr. Petry GmbH, Reutlingen, as well as the research partner Fraunhofer IGB, Stuttgart. We thank the BMBF for the financial support of the projects (Hydrofichi FKZ: 031B0341B; ExpandChi FKZ: 031B1047B) and PTJ J\u00fclich for the project management.<\/p>\n\n\n\n

RFL project: The IGF project 20207 N of the Forschungsvereinigung Forschungskuratorium Textil e.V., Berlin\/Germany, was funded by the Federal Ministry of Economics and Climate Protection through the AiF within the framework of the program for the promotion of joint industrial research and development (IGF) on the basis of a resolution of the German parliament.<\/p>\n","protected":false},"excerpt":{"rendered":"

In many areas, CO2 emissions can be reduced by replacing petroleum-based chemicals with products made from renewable raw materials. This protects the climate and the environment, and in many cases protects human and animal health. Chitosan-based finishing of textiles In textile finishing manufacturing processes, petroleum-based chemical auxiliaries can be replaced by products made from renewable […]<\/p>\n","protected":false},"author":59,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","nova_meta_subtitle":"DITF researchers are testing CO2-binding wood as a raw material for high-tech textiles and investigating possible uses for chitosan, for example as a binder substitute in coatings for previously petroleum-based systems","footnotes":""},"categories":[5572],"tags":[5838,15082,13264,19511,10408,11828,11323,12468,5820],"supplier":[16529,19726,21822,14032,535,649,18163,18162,16570],"class_list":["post-112655","post","type-post","status-publish","format-standard","hentry","category-bio-based","tag-bioeconomy","tag-chitosan","tag-coating","tag-finish","tag-greenchemistry","tag-lignin","tag-naturalfibers","tag-textiles","tag-wood","supplier-arbeitsgemeinschaft-industrieller-forschungsvereinigungen-otto-von-guericke-e-v-aif","supplier-bundesministerium-fur-wirtschaft-und-klimaschutz-bmwk","supplier-ditf-deutsche-institute-fur-textil-und-faserforschung-denkendorf","supplier-forschungskuratorium-textil-e-v","supplier-forschungszentrum-juelich","supplier-fraunhofer-institut-fuer-grenzflaechen-und-bioverfahrenstechnik-igb","supplier-helmbrechts","supplier-j-g-knopfs-sohn-gmbh","supplier-textilchemie-dr-petry-gmbh"],"_links":{"self":[{"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/posts\/112655","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/users\/59"}],"replies":[{"embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/comments?post=112655"}],"version-history":[{"count":0,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/posts\/112655\/revisions"}],"wp:attachment":[{"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/media?parent=112655"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/categories?post=112655"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/tags?post=112655"},{"taxonomy":"supplier","embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/supplier?post=112655"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}