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- W4295277529 endingPage "111566" @default.
- W4295277529 startingPage "111566" @default.
- W4295277529 abstract "Recently, decellularized amniotic membrane-derived hydrogels (DAMHs) have received significant attention for wound care, ocular surface reconstruction, and chondral healing. Despite the advantages of DAMHs for tissue engineering (TE), the loss of structural components during the decellularization process mitigates their mechanical strength and thus limits their practical application. Herein, we present a method for the surface modification of two-dimensional nanosilicates (laponite) as a rheological modifier to tailor the properties of DAMHs. Results show that after introducing nanosilicates, severe aggregation of the nanoparticles occurs, owing to the shielding effect of ions on the surface and edges of laponite. Loose interactions between the hydrophobic nanosilicate tactoids and hydrophilic polymer form laminated clay clusters surrounded by collagen fibers. At a high concentration of laponite (1:1 w/w), liquid-solid phase separation may also occur. A decreased storage modulus (up to 80 %), swelling ratio (up to 50 %), and gelation rate (up to 16 %) are thus attained. Electrosteric stabilization of the nanosilicates with amine-terminated polyethyleneglycol (AT-PEG) prevents aggregation of the nanosilicate in the hydrogel matrix and provides uniform distribution. As a result, most of the impaired physicomechanical properties are resolved. In vitro cell studies also determine that the AT-PEG modified nanosilicate-DAMHs exhibit higher cell viability and cell adhesion. The results of this research can pave the way toward developing injectable DAMHs with improved properties for TE." @default.
- W4295277529 created "2022-09-12" @default.
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- W4295277529 date "2022-10-01" @default.
- W4295277529 modified "2023-09-26" @default.
- W4295277529 title "Development of injectable hydrogels based on human amniotic membrane and polyethyleneglycol-modified nanosilicates for tissue engineering applications" @default.
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- W4295277529 doi "https://doi.org/10.1016/j.eurpolymj.2022.111566" @default.
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