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. 2020 Aug 11;11(10):2032–2040. doi: 10.1021/acsmedchemlett.0c00198

Figure 3.

Figure 3

Hydrogel characterization. (A–E) Histograms of droplet surface area distributions and images obtained by cross-polarized optical microscopy of hydrogel B (Panels A and D, cross-linked formulation with PFPE-Ester/PEI/F127) and hydrogel D (Panels B and E, non-cross-linked formulation with PFPE-Oxide/PEI/F127). Images obtained at 50× magnification. (C) Surface area distribution data for hydrogels B and D represented as a box plot. (F–I) Rheological behavior comparisons between PFPE-Ester (Hydrogel A) and PFPE-Oxide (Hydrogel C) hydrogels. Elastic modulus G′ (filled symbols) and viscous modulus G″ (empty symbols) during oscillatory frequency at room temperature (Panel F) and 5 °C (Panel G). (H) Elastic modulus G′ (filled symbols) and viscous modulus G′′ (empty symbols) during sweeps and strain amplitude sweeps. (I) Strain sweep at increasing temperatures from 2 to 50 °C showing sol to gel transition comparable to pure F127 hydrogel.