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- W3159353398 abstract "It is a challenging work to design novel responsive materials by controlling the secondary structure of polypeptide, especially β-sheet. We designed and synthesized a novel dual responsive diblock copolymer of methyl poly (ethylene glycol)-b-poly (O-benzyl-l-threonine) (mPEG-b-PBnLT). The copolymer solutions exhibited unusual and reversible gel-to-sol-to-gel transition behavior with temperature, and the transition temperature window could be easily adjusted by changing copolymer concentration or PBnLT block length. It was confirmed that low temperature gel-to-sol transition was due to the disassembly of the preliminary β-sheet layered nano-assemblies that induced the transformation of self-organized morphology from nanosized fibrils to spherical aggregates, while the high temperature sol-to-gel transition was ascribed to the dehydration of PEG segments. The disassembly of β-sheet structures was caused by the change in the polarity of the pendant benzyl ether bond of PBnLT block in water with temperature. This stimuli-responsiveness of secondary self-assembled nanostructures and the corresponding change in macroscopic phase transition inspires a brand-new strategy for structural design and functional control of polypeptide materials." @default.
- W3159353398 created "2021-05-10" @default.
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- W3159353398 date "2021-06-01" @default.
- W3159353398 modified "2023-10-14" @default.
- W3159353398 title "Dual thermoresponsive mPEG-b-poly(O-benzyl-l-threonine acid) hydrogel based on β-sheet nano-structural disassembly and PEG dehydration" @default.
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- W3159353398 doi "https://doi.org/10.1016/j.polymer.2021.123841" @default.
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