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- W2967214130 abstract "ABSTRACT Soft tissues, such as fat and skin, present high flexibility and are capable of withstanding large deformation in various functions. Hydrogels that can resemble the mechanical performance of soft tissue are unique and widely demanded. In this study, micellar hydrogels based on biocompatible poly( l ‐glutamic acid) (PLGA) were designed with the enhanced capacity to bear large deformation. Amphipathic triblock copolymer poly(ethylene glycol) acrylate‐ co ‐poly(ε‐caprolactone)‐ co ‐poly (ethylene glycol) acrylate (APEG‐PCL‐APEG) with two terminal double bonds was synthesized and self‐assembled into micelles. At the same time, graft copolymers, poly( l ‐glutamic acid)‐ g ‐hydroxyethyl methacrylate (PLGA‐ g ‐HEMA) with double bonds were synthesized. APEG‐PCL‐APEG micelles and PLGA‐ g ‐HEMA were mixed to construct micellar hydrogel via radical polymerization. The crystalline structure and hydrophobic aggregation of copolymers (APEG‐PCL‐APEG) were found to associate with PCL molecular weight. Due to the hydrophobic stress dissipation and crystalline structure of the micelles, the softness and toughness of hydrogels were promoted, exhibiting a 25% increase in ultimate strain. Moreover, the micellar hydrogels were able to load proteins with long‐term retention. In addition, under dynamic mechanical stimulation, the release of proteins could be accelerated. Besides, the micellar hydrogels also supported rabbit adipose‐derived stem cells (rASCs) growth, thus exhibiting the potential toward soft tissue engineering. © 2019 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2019 , 57 , 1115–1125" @default.
- W2967214130 created "2019-08-22" @default.
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- W2967214130 date "2019-08-16" @default.
- W2967214130 modified "2023-10-16" @default.
- W2967214130 title "Poly( <scp>l</scp> ‐glutamic acid)‐based micellar hydrogel with improved mechanical performance and proteins loading" @default.
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- W2967214130 doi "https://doi.org/10.1002/polb.24866" @default.
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