Microporous
(<2 nm) crystalline aluminosilicates in the form
of zeolites offer a great potential as efficient adsorbents for atmospheric
CO2 in the eminent battle against global warming and climate
change. The processability of conventional zeolite powders is, however,
poor, which limits their implementation in many applications, such
as in gas filtration industrial systems. In this work, we overcome
this issue through the preparation of hybrid foams using mesoporous/macroporous
supporting materials based on the strong network properties of gelatin/nanocellulose,
which can support ultrahigh loadings of silicalite-1, used as a model
sorbent nanomaterial. We achieved up to 90 wt % of zeolite content
and a microporous/mesoporous/macroporous hybrid material. The application
of hybrid foams for selective CO2 sorption exhibits a linear
relationship between the zeolite content and CO2 adsorption
capacity and high selectivity over N2, where the gelatin/nanocellulose
foam efficiently supports the zeolite crystals without apparently
blocking their pores.
Considering the current trend of finding sustainable alternatives to the exisitng fossil-based plastics, in this review we describe what makes a bioelastomer to be considered “bio”, and what does this...
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