Auto‐Crosslinked Rigid Foams Derived from Biorefinery Byproducts

Abstract : A new macroporous foam‐like material is presented based on autocross‐linking humins, an industrial biorefinery byproduct. Humins foams are obtained by a simple heating process, without any pretreatment and with high control of morphology, porosity, and carbon content. Untreated humins have been characterized by GC, ultra‐performance liquid chromatography (UPLC), elemental analysis, and FTIR, whereas the mechanism of foaming was elucidated by a combination of thermal and rheological analyses. A preliminary screening of conditions was conducted to identify the parameters controlling this foaming process. A foam was produced in a controlled way with open and/or closed cells with cell diameters between 0.2 and 3.5 mm. Humins foams were characterized by Raman spectroscopy, FTIR, SEM, nitrogen adsorption, pycnometry, and mechanical tests. The results show that, based on humins, it is possible to obtain porous materials with controlled architectures and a range of parameters that can be tailored, depending on the foreseen applications.
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Pierluigi Tosi, Gerard Van klink, Alain Celzard, Vanessa Fierro, Luc Vincent, et al.. Auto‐Crosslinked Rigid Foams Derived from Biorefinery Byproducts. ChemSusChem, ChemPubSoc Europe/Wiley, 2018, 11 (16), pp.2797-2809. ⟨10.1002/cssc.201800778⟩. ⟨hal-02355864⟩



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