Polyurethane nanocomposite based gas barrier films, membranes and coatings: A review on synthesis, characterization and potential applications

Effect of Process Variables on the Solvolysis Depolymerization of Pine Kraft Lignin

“…In polyurethanes, lignin can be used as a polyol precursor for cross-linking due to its polyphenolic structure and abundance of aliphatic hydroxyl groups [18]. Polyurethanes have a myriad of applications, including foams, coats, membranes [19], and even medical applications like bone repair [20]. Additionally, lignin can also be used in composites [21], binders [22], and as a carbon fiber precursor [23].…”

Unmodified kraft lignin isolated at room temperature from aqueous solution for preparation of highly flexible transparent polyurethane coatings

“…Due to a broad variability of appropriate monomer components, polyurethanes (PU) are one of the most versatile classes of synthetic polymers, 1,2 known for their broad variety of applications including as foams (exible foams 3,4 for isolation and packaging 5 mattress or car seats 6 ), adhesives, elastomers, and coatings. 7 According to a marked study, the total PU production was reported to be 5.44 Mio tonnes in 2011 with a forecast of 6.35 Mio tones in 2016, equivalent to an average growth of 3% p.a. 8 Polyurethanes are usually synthesized by an exothermic reaction of a diol (or polyol) with an isocyanate leading to the urethane linkage between the monomeric units ( Fig.…”

A study on graphene composites for peripheral nerve injury repair under electrical stimulation

“…In recent years, thermoplastic polyurethane (TPU) has exhibited good biocompatibility and it is also a kind of polymer matrix with good elasticity and affinity to carbon llers. 26 Furthermore, graphene nanoparticles can signicantly improve the electrical conductivity and mechanical properties of the TPU matrix. Meanwhile, TPU improves the biocompatibility and process ability of graphene, which are promising composite materials that can be further studied for tissue regeneration.…”