Preparation of Anisotropic Micro-Hydrogels with Tunable Structural and Topographic Features by Compound Interfacial...

Area of Science:

• Materials Science
• Biotechnology
• Chemical Engineering

Background:

• Fabricating microstructures with precise control over shape and surface properties is crucial for advanced applications.
• Janus emulsions offer unique properties due to their distinct compartments, but their controlled synthesis remains challenging.

Purpose of the Study:

• To develop a versatile method for producing monodisperse Janus emulsions with controllable structural and topographic features.
• To enable independent control over compartmental features and geometric properties for on-demand generation.

Main Methods:

• Compound Interfacial Shearing (CIS) process utilizing active periodic forces.
• Photopolymerization of poly(ethylene glycol) diacrylate (PEGDA) to form micro-hydrogels.
• Modification of micro-hydrogels with oily dispersed phases and RGDS-conjugated polystyrene microspheres.

Main Results:

• Successful production of monodisperse Janus emulsions with controlled compartment numbers and interfacial curvatures.
• Creation of anisotropic micro-hydrogels with tunable surface and internal features.
• Demonstrated encapsulation and proliferation of MCF-7 breast cancer cells with high viability.
• Achieved controlled spatial adhesion of MCF-7 and HUVEC cells on 3D substrates of varying curvatures.

Conclusions:

• The CIS process provides a simple, scalable approach for generating Janus emulsions with tailored features.
• This method facilitates the creation of 3D substrates with controllable topography for guided cell organization.
• The developed micro-hydrogels show potential for applications in tissue engineering and regenerative medicine.