1 research outputs found
Lignin Modification with Carboxylic Acids and Butyrolactone under Cold Plasma Conditions
The modification of organosolv lignin
powder (ALCELL) with different
carboxylic acids such as oleic, lactic, and butyric acids and butyrolactone
under cold plasma discharge has been performed. The X-ray photoelectron
spectroscopy (XPS), attenuated total reflectance Fourier transform
infrared (ATR-FTIR), and <sup>1</sup>H NMR spectroscopy, scanning
electron microscopy (SEM), and thermal methods (differential scanning
calorimetry (DSC) and thermogravimetry (TG)) proved that the lignin
modification took place. The structure, morphology and thermal properties
are specific for each kind of product obtained. The modification degree
determined on the basis of XPS data varies from 4 to 13% depending
on reagent used. The significant changes in the thermal properties
indicate that the modification by cold plasma affected also some bulk
properties. This is the case mainly for modification with butyric
acid and butyrolactone. It was concluded that the cold plasma modification
is an efficient and eco-friendly technique able to produce new valuable
products from lignin, widening its compatibility with various polymers
and also its applications