Barolo, Claudia

Bonomo, Matteo

Galliano, Simone

Mariotti, Nicole

Viada, Gabriele

English

Institutional Research Information System University of Turin

Milan Polymer Days – MIPOL2023, 7-9 June 2023   Increasing bio-based and circular content of a thermosetting polyurethane for encapsulation of optoelectronic devices: a multivariate investigation Gabriele Viadaa, Nicole Mariottia,b, Simone Gallianoa,b,e, Alberto Menozzid, Federica Tammarod, Walter Gianellid, Matteo Bonomoa,b, Claudia Baroloa,b,c aDepartment of Chemistry and NIS Interdepartmental Centre, University of Turin, Torino, Italy bNational InterUniversity Consortium of Materials Science and Technology (INSTM), Florence, Italy cInstitute of Science, Technology and Sustainability for Ceramics, National Research Council of Italy, Faenza, Italy dDemak Polymers - Torino, Italy eDepartment of Agricultural, Forest and Food Sciences, University of Turin, Grugliasco (TO), Italy gabriele.viada@unito.it    In recent years, the use of polyurethanes (PUs) has enormously increased in the industrial context for their versatile synthesis and tunable physicochemical properties.  Nowadays PU-based materials are massively used in many fields, from building construction to automotive, to biomedical application [1]. However, the wide use of fossil-based precursors leads to negative environmental impacts and poor sustainability. Thus, it is essential to implement alternative reagents, aiming to improve the sustainability of polyurethanes reducing resource consumption and carbon footprint [2,3]. In this perspective, bio-based and recycled precursors can be valuable candidates toward more sustainable and circular PUs.  In this work, a facile and solvent-free procedure is setted for the formulation of an innovative and more eco-friendly PU formulation. The latter is optimized starting from a commercial polyurethane resin for LED encapsulation, whose fossil-based components have been partially substituted with bio-based and recycled ones: bis(2-hydroxyethyl) terephthalate (BHET) is directly implemented in the formulation as waste-derived material without any further treatments in conjunction with a bio-derived trifunctional polyol (Sovermol®780). To thoughtfully drive this optimization and to face all the formulation and process variables involved, a multivariate statistical approach (Design of Experiments) is successfully exploited, allowing the individuation of the most influential factors and ensuring the most economical and efficient way of analysis [4]. As a result, optimized formulation allows the partial replacement of the fossil-based raw materials, obtaining a PU with a 24.4% of green inputs and comparable to the commercial counterpart in terms of transmittance, thermal stability, and with outstanding long-term stability. Milan Polymer Days – MIPOL2023, 7-9 June 2023    References 1 J. O. Akindoyo, M. D. H. Beg, S. Ghazali, M. R. Islam, N. Jeyaratnam, A. R. Yuvaray, RSC Adv. (2016) 6, 114453 2 R. Morales-Cerrada, R. Tavernier, S. Caillol, Polymers (2011), 13, 1255. 3 A. L. Silva, J. C. Bordado, Catal. Rev. – Sci. Eng. (2004) 46, 31 4 C. Pontremoli, G. Chinigò, S. Galliano, M.J. Moran Plata, D.M. Dereje, E. Sansone, A. Gilardino, C. Barolo, A. Fiorio Pla, S. Visentin, N. Barbero, Dyes Pigm. (2023) 210, 111047  Acknowledgments This research acknowledges support from the Project CH4.0 under the MUR program “Dipartimenti di Eccellenza 2023-2027” (CUP D13C22003520001).  

Increasing biobased and circular content of a thermosetting polyurethane for encapsulation of optoelectronic devices: a multivariate investigation

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Increasing biobased and circular content of a thermosetting polyurethane for encapsulation of optoelectronic devices: a multivariate investigation

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