Fig. 2

Preparation and characterizations of EHG. (A) Fluorescent confocal microscopic images of EHG loaded with Cel in oil phase, scale bar represented as 20 μm. (B) Release profiles of FITC dextran-loaded droplets of EHG in the presence of PBS (square) and lipase (upper triangle), the EHG are prepared with different oil phase, the oil phase consists of iodized oil (I) with different 0 vol%, 5 vol%, 10 vol%, 15 vol% and 20 vol% castor oil (C). (C) Release profiles of Nile red-loaded in the oil phase of EHG in the presence of PBS (square) and lipase (upper triangle), the EHG are prepared with different oil phase, the oil phase consists of a mixture of iodized oil (I) and 0 vol%, 5 vol%, 10 vol%, 15 vol% and 20 vol% castor oil (C). (D) Phase diagram of EHG prepared at oil to water ratio of 1:2, with different concentrations of shellac-NPs in water phase and NH₂-PS-NH₂ telechelic polymers in oil phase. If not specified, the oil phase consists of a mixture of 80 vol% iodized oil and 20 vol% castor oil, and the NH₂-PS-NH₂ concentration in the oil phase is 10 mg/mL and the concentration of shellac NPs in the water phase is 1.67 mg/mL. (E) Strain sweeps of elastic modulus G′ and viscous modulus G″ at oil to water ratio of 1:2, showing characteristic shear-thinning behaviors. The frequency is held constant at 1 rad/s. (F) Frequency sweeps of elastic modulus G′ and viscous modulus G″ at oil to water ratio of 1:2, showing characteristic shear-thinning behaviors. The strain is held constant at 1%. (G) Temperature sweeps of elastic modulus G′ and viscous modulus G″ at oil to water ratio of 1:2 from 20 to 50℃. The strain is held constant at 1% and the frequency is held constant at 1 rad/s. (H-J) 3D printing of EHG in air. (K) 3D printing of EHG directly in water. Scale bars in H, I, J and K are 1 cm