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Advanced Biomaterials for Biomedical Applications Lab

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 > Here, we present a novel strategy to fabricate hyaluronic acid (HA) hydrogels with excellent physical and biological properties. The cross-linking of HA hydrogel by butanediol diglycidyle ether (BDDE) was characterized under different reaction temperatures, and the resulting physical properties (i.e., the storage modulus and swelling ratio) were measured. The ratio between the cross-linking rate (a strengthening effect) and the hydrolysis rate (a weakening effect) was much greater with lower cross-linking temperatures after sufficient cross-linking time, resulting in a noticeably higher storage modulus. As the cross-linking temperature decreased, the formed HA hydrogel structure became denser with smaller pores. Moreover, the introduction of low-temperature HA cross-linking strategy also resulted in an enhanced several important characteristics of HA hydrogels including its enzymatic resistivity and its ability to elicit a cellular response. These results indicate the performance of HA hydrogels can be markedly enhanced without further additives or modifications, which is expected to contribute to the advancement of applications of HA hydrogels in all industrial fields.
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