A Multi-Analytical Study of Nanolignin/Methylcellulose-Coated Groundwood and Cotton Linter Model Papers
Mia Bloss, Marianne Odlyha, Charis Theodorakopoulos
TL;DR
This study explores using lignin nanoparticles in methylcellulose coatings to improve the durability of handmade papers under aging conditions.
Contribution
The novel synthesis and application of nanolignin in methylcellulose coatings for paper conservation is presented.
Findings
LNPs were successfully synthesized and incorporated into methylcellulose coatings.
Coated papers showed improved mechanical properties and color stability during aging.
LNPs did not contribute to the formation of carbonyl and carboxyl groups during aging.
Abstract
This paper presents the synthesis of sustainable lignin nanoparticles (LNPs) and their application in methylcellulose (MC) as LNP/MC coatings for handmade papers. LNPs were produced from bulk kraft lignin via an acetone/water and sonication method, then incorporated into a 1 wt% methylcellulose (MC) matrix at concentrations of 0.4, 1, and 2 wt%. Groundwood and cotton linter papers were coated and exposed to 90 °C and 45% relative humidity (RH) for 16 days and the samples’ response to ageing at different concentrations of nanolignin was tested using a multi-analytical approach. The morphology of the LNPs was revealed with scanning electron microscopy, and most LNPs measured below a diameter of 30.8 nm. Colourimetry showed coated samples were inherently darker than uncoated samples but mostly stable in colour. pH remained near neutral for coated groundwood papers during ageing, but cotton…
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Taxonomy
TopicsAdvanced Cellulose Research Studies · Lignin and Wood Chemistry · Material Properties and Processing