Liangliang An, Jiansong Chen, Jihun Heo, J. W. Kim, Hyung Mo Jeong, Duck Hyun Youn, Yong Sik Kim
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Preparation of pH-responsive lignin via a thiol-yne reaction and its application in hydrogel
Abstract Multifunctional modification is a feasible means of improving the high value-added application of lignin. In this study, a novel pH-responsive lignin was synthesized via a green and efficient ultraviolet-induced thiol-yne reaction. Chemical structure analyses confirmed that the thiol-yne reaction was successful, and that the tertiary amino groups were attached to the lignin macromolecules. The weight-average molecular weight of the modified lignin increased to 13600 mol/g compared to kraft lignin at 8700 mol/g. The nitrogen and sulfur contents of the grafted chains were 2.86% and 4.36%, respectively. Additionally, the introduced tertiary amino groups induced the pH-responsive behavior of the modified lignin. To fully utilize the modified lignin, it was used to make hydrogels that exhibited varying swelling ratios at different pH values. Therefore, the pH-responsive lignin produced in this study exhibits excellent potential for high value-added applications.
期刊介绍：
The Journal of Wood Chemistry and Technology (JWCT) is focused on the rapid publication of research advances in the chemistry of bio-based materials and products, including all aspects of wood-based polymers, chemicals, materials, and technology. JWCT provides an international forum for researchers and manufacturers working in wood-based biopolymers and chemicals, synthesis and characterization, as well as the chemistry of biomass conversion and utilization.
JWCT primarily publishes original research papers and communications, and occasionally invited review articles and special issues. Special issues must summarize and analyze state-of-the-art developments within the field of biomass chemistry, or be in tribute to the career of a distinguished researcher. If you wish to suggest a special issue for the Journal, please email the Editor-in-Chief a detailed proposal that includes the topic, a list of potential contributors, and a time-line.
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