Interfacial catalysis and lignin nanoparticles for strong fire- and water-resistant composite adhesives

Abstract

Wood is increasingly replacing concrete to reduce CO2 emissions in buildings, but fossil-based adhesives are still being used in wood panels. Epoxidized lignin adhesives could be a potential replacement, but...

Recombinatorial approach for the formation of surface-functionalised alkaline-stable lignin nanoparticles and adhesives

“…42 The same interparticle crosslinked LNPs demonstrated improvement also when compared to the previously reported results for intraparticle-crosslinked hybrid bisphenol A/diglycidyl ether-modified lignin nanoparticles developed as wood adhesives which reached an ultimate shear strength of 4.0 ± 0.8 MPa with a relatively high concentration of NPs on the junction surface of 0.1 kg m −2 . 25 In a recent work, 43 a novel wood adhesive was prepared by crosslinking water-soluble epoxidised lignin with LNPs , a maximum ultimate shear strength of 13 MPa, being more than twice the value obtained for GlySol EtOAc + Ins EtOAc LNPs , was achieved by applying an interface loading which was a thousand times higher than that shown in the present study. When considering other bio-based adhesives for glass, LNPs on aminated glass showed similar performances as chitin-amyloid mixtures 44 and chitin nanocrystals 45 on pristine glass.…”

Stabilized Lignin Nanoparticles for Versatile Hybrid and Functional Nanomaterials

“…It has become apparent that overcoming the solvent instability of LNPs would render them plausible alternatives to fossil-based and inorganic nanoparticles such as polystyrene or silica nanoparticles. This can be achieved via internal cross-linking of LNPs by addition of a cross-linker during their supramolecular assembly. − Another means to stabilize LNPs is by enzymatic treatment with oxidoreductive enzymes such as laccases. , Wang et al solvent-fractionated birchwood soda lignin sequentially with isopropanol, ethanol, and methanol and treated the methanol-soluble fraction with laccase at pH 10 . The product was isolated and used to assemble LNPs for reduction of silver ions under alkaline conditions.…”

“…This can be achieved via internal cross-linking of LNPs by addition of a cross-linker during their supramolecular assembly. 24 − 27 Another means to stabilize LNPs is by enzymatic treatment with oxidoreductive enzymes such as laccases. 28 , 29 Wang et al solvent-fractionated birchwood soda lignin sequentially with isopropanol, ethanol, and methanol and treated the methanol-soluble fraction with laccase at pH 10.…”

Breathable Lignin Nanoparticles as Reversible Gas Swellable Nanoreactors

“…[23][24][25] Among them, the aromatic plant polymer lignin is one of the most promising bio-based raw materials. [26][27][28][29][30][31] In this sense, lignin nanoparticles (LNPs) are postulated as prime platform for the development of stimuli-responsive nanoparticles. [32][33][34] In recent years the classical disdain on ligninbasically viewed as a byproduct from the pulp and paper industry and destined to be combusted -has given way to a paradigm shift towards the development of lignin-based advanced materials, supported by the inherent properties such as biodegradability, antioxidant activity, and absorbance of UV radiation which are preserved in LNPs.…”