Lignin-derived High-performance Near-infrared Light-responsive Shape Memory Polyurethanes for Biomedical Applications
RESEARCH ARTICLE|Updated:2026-03-26
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Lignin-derived High-performance Near-infrared Light-responsive Shape Memory Polyurethanes for Biomedical Applications
Chinese Journal of Polymer ScienceVol. 44, Issue 4, Pages: 1090-1101(2026)
Affiliations:
a.State Key Laboratory of Organic-Inorganic Composites, Beijing Laboratory of Biomedical Materials, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China
b.Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen University, Xiamen 361102, China
c.Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
d.Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Life Science and Technology, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
Dai, S. Y.; Li, J. Y.; Mao, L. C.; Zhou, D. H.; Zhang, Y.; Gan, Z. H.; Ning, Z. B.; Lu, Y. F. Lignin-derived high-performance near-infrared light-responsive shape memory polyurethanes for biomedical applications. Chinese J. Polym. Sci. 2026, 44, 1090–1101
Su-Yang Dai, Jia-Yue Li, Ling-Chen Mao, et al. Lignin-derived High-performance Near-infrared Light-responsive Shape Memory Polyurethanes for Biomedical Applications[J]. Chinese Journal of Polymer Science, 2026, 44(4): 1090-1101.
Dai, S. Y.; Li, J. Y.; Mao, L. C.; Zhou, D. H.; Zhang, Y.; Gan, Z. H.; Ning, Z. B.; Lu, Y. F. Lignin-derived high-performance near-infrared light-responsive shape memory polyurethanes for biomedical applications. Chinese J. Polym. Sci. 2026, 44, 1090–1101DOI: 10.1007/s10118-026-3574-0.
Su-Yang Dai, Jia-Yue Li, Ling-Chen Mao, et al. Lignin-derived High-performance Near-infrared Light-responsive Shape Memory Polyurethanes for Biomedical Applications[J]. Chinese Journal of Polymer Science, 2026, 44(4): 1090-1101.DOI: 10.1007/s10118-026-3574-0.
Lignin-derived High-performance Near-infrared Light-responsive Shape Memory Polyurethanes for Biomedical Applications
Demethylated dealkaline lignin (DDL) was used to prepare polyurethane followed by Fe
3+
complexation to form DDL-Fe
3+
complexes. This strategy significantly enhanced the photothermal performance of natural lignin. The resulting PU-DDL+Fe
3+
polyurethane exhibits excellent NIR light-responsive shape memory performance with good mechanical properties and biocompatibility.
Abstract
Near-infrared (NIR) light-responsive shape memory polymers (SMPs) show great promise for biomedical applications
but conventional photothermal agents suffer from high cost
complex preparation
or poor biocompatibility
while lignin-based alternatives exhibit insufficient photothermal conversion efficiency. Herein
we developed a novel strategy to enhance photothermal performance of lignin through sequential demethylation modification and Fe
3
+
complexation for constructing NIR light responsive SMPs. Dealkaline lignin (DL) was first demethylated using iodocyclohexane to produce demethylated lignin (DDL) with increased catechol content
which was then incorporated into polycaprolactone-based polyurethane synthesis followed by Fe
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