Aqueous Dispersions of Esterified Lignin Particles for Hydrophobic Coatings

Frontiers in Chemistry
Qi HuaScott Renneckar

Abstract

An aqueous biopolymer dispersion coating system was synthesized utilizing softwood kraft lignin and a long chain organic acid. The chemical treatment of lignin was a two-step procedure, which first consisted of hydroxyethylation of the phenolic groups on lignin utilizing ethylene carbonate and an alkaline catalyst. This first step resulted in the lignin containing more than 80% aliphatic hydroxyl functionality (1H NMR). Following this step, oleic acid was reacted with hydoxyethyl lignin in order to form ester derivatives. With nearly a total reduction in absorbance in the hydroxyl stretching region, FT-IR analysis showed the majority of the hydroxyl groups was esterified forming an ethyl oleate derivative. Semi-quantitative 13C NMR analysis of the lignin revealed 88% substitution of the lignin hydroxyl groups. This derivative was soluble in organic solvent such as toluene and tetrahydrofuran. Solutions of lignin derivatives were slowly precipitated through dialysis, resulting in a stable dispersion of lignin microparticles in distilled water. The 1-2 μm average diameter size of the precipitated particles was found with dynamic light scattering of the suspensions. Spray and spin coating were used to apply the lignin derivative d...Continue Reading

References

Mar 9, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Yoshimasa Urushihara, Takashi Nishino
Jul 12, 2005·Biomacromolecules·Wim Thielemans, Richard P Wool
Apr 17, 2007·Current Opinion in Plant Biology·Rochus Franke, Lukas Schreiber
Apr 24, 2013·Chemical Communications : Chem Comm·Andreas GeisslerMarkus Biesalski
Aug 1, 2015·International Journal of Molecular Sciences·James H ClarkJames Sherwood
Dec 6, 2017·Advanced Materials·Feng JiangLiangbing Hu
Apr 17, 2018·Chemical Society Reviews·E Johan FosterJeff Youngblood
May 3, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Oriol CusolaOrlando J Rojas
May 15, 2018·International Journal of Environmental Research and Public Health·Na LvLei Luo
Sep 18, 2018·ACS Sustainable Chemistry & Engineering·Camilla Abbati de AssisOrlando J Rojas

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Citations

Jul 3, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Pieter Samyn
Aug 7, 2021·Biotechnology for Biofuels·Lisanne de VriesShawn D Mansfield

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Methods Mentioned

BETA
acetylation
NMR
Infrared Spectroscopy
dynamic light scattering
AFM
differential scanning calorimetry
scanning
atomic force microscopy

Software Mentioned

ScanAsyst
Astra
Drop Shape Analyzer ( DSA )

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