A Morphological Study of Organasolv Lignin Aggregates from Miscanthus x giganteus at Different Ethanol Concentration
Publication Date : 07/02/2018
Understanding the interaction of lignin with a solvent containing two components with different concentrations, ethanol and water present a significant knowledge contribution prior to modification and converting lignin into useful renewable materials. Soluble lignin extract at different ethanol concentrations (50%, 25% and 10%) were examined for morphological characterisation via light microscopy. 10 recorded images from light microscopy were processed via imageJ software (1.50v) to characterise the size and shape factors such as circularity and circle equivalent diameter. Results showed that reduction of 50% ethanol concentration to 25% and 10% of soluble lignin extract resolved population of large particle into sub-population of small particle lignin aggregates. The big lumps of lignin aggregates broke into smaller and rounder pieces of particles. The reduction of particle size of lignin aggregates in the soluble lignin extract at low ethanol concentration was pivotal in preparing a feedstock for lignin modification process.
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