Preparation of pH-responsive lignin via a thiol-yne reaction and its application in hydrogel

IF 1.7 4区农林科学 Q2 MATERIALS SCIENCE, PAPER & WOOD

Journal of Wood Chemistry and Technology Pub Date : 2022-09-21 DOI:10.1080/02773813.2022.2120898

Liangliang An, Jiansong Chen, Jihun Heo, J. W. Kim, Hyung Mo Jeong, Duck Hyun Youn, Yong Sik Kim

引用次数: 0

Abstract

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.

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巯基炔反应制备ph响应木质素及其在水凝胶中的应用

摘要多功能改性是提高木质素高附加值应用的可行手段。在本研究中，通过绿色高效的紫外线诱导的硫醇炔反应合成了一种新型的pH响应性木质素。化学结构分析证实硫醇-炔反应是成功的，叔氨基连接在木质素大分子上。改性木质素的重均分子量增加到13600 mol/g，与8700的硫酸盐木质素相比 mol/g。接枝链的氮和硫含量分别为2.86%和4.36%。此外，引入的叔氨基诱导了改性木质素的pH响应行为。为了充分利用改性的木质素，它被用于制备在不同pH值下表现出不同溶胀率的水凝胶。因此，本研究中生产的pH响应性木质素在高附加值应用方面表现出优异的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Wood Chemistry and Technology 工程技术-材料科学：纸与木材

CiteScore

3.70

自引率

20.00%

发文量

审稿时长

3 months

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.