4.5 Article

Thermally tunable hydrogel crosslinking mediated by temperature sensitive liposome

期刊

BIOMEDICAL MATERIALS
卷 16, 期 6, 页码 -

出版社

IOP Publishing Ltd
DOI: 10.1088/1748-605X/ac246c

关键词

hydrogel synthesis; thermosensitive liposome; hydrogel crosslinking; polymer functionalization; tunable storage modulus

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This study demonstrates a method to control and modulate hydrogel crosslinking using temperature-sensitive liposomes, achieving tunable properties of the hydrogel within a mild temperature range, while ensuring good biocompatibility. This work opens up new opportunities for implementing a thermal energy system to control and modulate hydrogel properties.
Hydrogel crosslinking by external stimuli is a versatile strategy to control and modulate hydrogel properties. Besides photonic energy, thermal energy is one of the most accessible external stimuli and widely applicable for many biomedical applications. However, conventional thermal crosslinking systems require a relatively high temperature (over 100 degrees C) to initiate covalent bond formation. To our knowledge, there has not been a thermally tunable hydrogel crosslinking system suitable for biological applications. This work demonstrates a unique approach to utilize temperature sensitive liposomes to control and modulate hydrogel crosslinking over mild temperature range (below 50 degrees C). Temperature sensitive liposomes were used to control the release of chemical crosslinkers by moderate temperature changes. The thermally controlled crosslinker release resulted in tunable mechanical and transport properties of the hydrogel. No significant inflammable response observed in the histology results ensured the biocompatibility of the liposome-mediated crosslinkable hydrogel. This work opens new opportunities to implement thermal energy system for control and modulate hydrogel properties.

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