Light‐Driven Waste‐To‐Value Upcycling: Bio‐Based Polyols and Polyurethanes from the Photo‐Oxygenation of Cardanols. Issue 16 (12th July 2021)

• Record Type: Journal Article
• Authors: Stuhr, Robin; Bayer, Patrick; Stark, Christian B. W.; Jacobi von Wangelin, Axel
• Is Part Of: ChemSusChem. Volume 14:Issue 16(2021)
• Page Start: 3325
• Page End: 3332
• Publication Date: 2021-07-12
• Subjects: biomass valorization -- oxidation -- photochemistry -- polyurethane -- polyols; Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.202101175
• Languages: English
• ISSNs: 1864-5631

Abstract

Abstract: The upcycling of waste biomass into valuable materials by resource‐efficient chemical transformations is a prime objective for sustainable chemistry. This approach is demonstrated in a straightforward light‐driven synthesis of polyols and polyurethane foams from the multi‐ton waste products of cashew nut processing. The photo‐oxygenation of cardanol from nutshell oil results in the formation of synthetically versatile hydroperoxides. The choice of the workup method (i. e., reduction, hydrogenation, epoxidation) enables access to a diverse range of alcohols with tunable alkene and OH functions. Condensation with isocyanates to give rigid polyurethane foams provides a resource‐efficient waste‐to‐value chain that benefits from the availability of cardanol and installation of OH groups from aerial O2 . Abstract : A tough nut to crack : The upcycling of waste biomass into valuable materials is a prime objective for sustainable chemistry. The multi‐ton waste cashew nut shell liquid is used in the light‐driven synthesis of polyols with tunable OH contents and in the subsequent preparation of rigid polyurethane foams.