{"id":161427,"date":"2025-04-11T07:20:00","date_gmt":"2025-04-11T05:20:00","guid":{"rendered":"https:\/\/renewable-carbon.eu\/news\/?p=161427"},"modified":"2025-04-09T09:58:15","modified_gmt":"2025-04-09T07:58:15","slug":"bio-based-networks-with-shape-memory-and-recyclability","status":"publish","type":"post","link":"https:\/\/renewable-carbon.eu\/news\/bio-based-networks-with-shape-memory-and-recyclability\/","title":{"rendered":"Bio-based networks with shape memory and recyclability\u00a0"},"content":{"rendered":"\n\n\n

The team led by Yanfeng Zhang from Zhejiang University has developed polydithioacetal-based covalent adaptive networks (PDTA-CANs) from renewable raw materials. The crosslinking is achieved by a solvent-free polyreaction at room temperature between benzaldehydes of plant origin and tetra-thiol monomers. The key to the material concept lies in the reversible dithioacetal bond, whose exchange reaction occurs under mild conditions.<\/p>\n\n\n\n

\"\nShape
Shape memory at body temperature: A PDTA stent unfolds in the blood vessel \u2013 demonstrating the potential of bio-based dynamic networks. \u00a9 Ricardo – stock.adobe.com<\/figcaption><\/figure>\n\n\n\n

The polymers not only exhibit remarkable recyclability<\/strong>, including mechanical reprocessing, chemical recycling and conversion back into monomers, but also self-healing properties<\/strong>. The mechanical performance is maintained \u2013 even after multiple reuses. This makes PDTA materials attractive for long-lasting applications with high sustainability requirements.<\/p>\n\n\n\n

Reading tip: Functional Coatings<\/h3>\n\n\n\n

The EC Tech Report \u201cFunctional Coatings\u201d<\/a> gives you an up-to-date bundle on functional coatings with articles, videos and other handpicked content. In addition to technical articles about the latest technical developments, this all-in-one multi-media pack is rounded off with valuable market insights and important fundamentals about functional coatings formulation.<\/p>\n\n\n\n

Shape memory with adjustable activation temperature<\/h3>\n\n\n\n

Another key feature is the materials\u2019 shape-memory capability: by adjusting the cross-linking density, the activation temperature can be precisely controlled \u2013 right up to triggering at body temperature. In a demonstration experiment, a PDTA shrink stent was placed in a blood vessel, where it automatically expanded at 37\u00b0C and provided mechanical support.<\/p>\n\n\n\n

This demonstrates the potential of these novel materials in the field of biomedical implants<\/strong> and functional coating systems. Their hydrolytic stability, biocompatibility and flexible processing make them promising candidates for future applications in which sustainability and functionality are to be combined.<\/p>\n\n\n\n

Source: Polymer Chemistry<\/em>, Issue 13, 2025, DOI: 10.1039\/d4py01915h<\/p>\n","protected":false},"excerpt":{"rendered":"

The team led by Yanfeng Zhang from Zhejiang University has developed polydithioacetal-based covalent adaptive networks (PDTA-CANs) from renewable raw materials. The crosslinking is achieved by a solvent-free polyreaction at room temperature between benzaldehydes of plant origin and tetra-thiol monomers. The key to the material concept lies in the reversible dithioacetal bond, whose exchange reaction occurs […]<\/p>\n","protected":false},"author":59,"featured_media":161484,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","nova_meta_subtitle":"A Chinese research team has developed a novel bio-based polymer system that is not only fully recyclable but also has an adjustable shape memory. The dithioacetal-based networks can be reused multiple times without sacrificing mechanical properties","footnotes":""},"categories":[5572,17143],"tags":[5838,12348,10408,12351,12679,5528],"supplier":[26086],"class_list":["post-161427","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bio-based","category-recycling","tag-bioeconomy","tag-coatings","tag-greenchemistry","tag-medicaldevices","tag-recyclability","tag-sustainability","supplier-zheijang-university"],"_links":{"self":[{"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/posts\/161427","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=161427"}],"version-history":[{"count":0,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/posts\/161427\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/media\/161484"}],"wp:attachment":[{"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/media?parent=161427"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/categories?post=161427"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/tags?post=161427"},{"taxonomy":"supplier","embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/supplier?post=161427"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}