My watch list
my.chemeurope.com  
Login  

Molecules, Vol. 23, Pages 377: Quantification and Variability Analysis of Lignin Optical Properties for Colour-Dependent Industrial Applications

Molecules, Vol. 23, Pages 377: Quantification and Variability Analysis of Lignin Optical Properties for Colour-Dependent Industrial Applications

Molecules doi: 10.3390/molecules23020377

Authors: Olumoye Ajao Jawad Jeaidi Marzouk Benali Andrea Restrepo Naima El Mehdi Yacine Boumghar

Lignin availability has increased significantly due to the commercialization of several processes for recovery and further development of alternatives for integration into Kraft pulp mills. Also, progress in lignin characterization, understanding of its chemistry as well as processing methods have resulted in the identification of novel lignin-based products and potential derivatives, which can serve as building block chemicals. However, all these have not led to the successful commercialization of lignin-based chemicals and materials. This is because most analyses and characterizations focus only on the technical suitability and quantify only the composition, functional groups present, size and morphology. Optical properties, such as the colour, which influences the uptake by users for diverse applications, are neither taken into consideration nor analysed. This paper investigates the quantification of lignin optical properties and how they can be influenced by process operating conditions. Lignin extraction conditions were also successfully correlated to the powder colour. About 120 lignin samples were collected and the variability of their colours quantified with the CIE L*a*b* colour space. In addition, a robust and reproducible colour measurement method was developed. This work lays the foundation for identifying chromophore molecules in lignin, as a step towards correlating the colour to the functional groups and the purity.

Authors:   Ajao, Olumoye ; Jeaidi, Jawad ; Benali, Marzouk ; Restrepo, Andrea M.; El Mehdi, Naima ; Boumghar, Yacine
Journal:   Molecules
Volume:   23
edition:   2
Year:   2018
Pages:   377
DOI:   10.3390/molecules23020377
Publication date:   10-Feb-2018
Facts, background information, dossiers
More about Molecular Diversity Preservation International
Your browser is not current. Microsoft Internet Explorer 6.0 does not support some functions on Chemie.DE