Smart Microcapsules with Molecular Polarity- and Temperature-Dependent Permeability.

Area of Science:

• Materials Science
• Chemical Engineering
• Biotechnology

Background:

• Microcapsules with selective permeation are crucial for applications like microreactors and drug delivery.
• Existing methods for controlling transmembrane transport in microcapsules are limited.
• Advanced regulation of molecular transport is a key challenge in microcapsule technology.

Purpose of the Study:

• To design smart microcapsules with molecular polarity- and temperature-dependent permeability.
• To develop a novel method for creating microcapsules with tunable transport properties.
• To explore the potential of these microcapsules in advanced applications.

Main Methods:

• Fabrication of water-in-oil-in-water (W/O/W) double-emulsion drops using capillary microfluidics.
• Photopolymerization of an oil shell composed of two monomers and dodecanol to form a polymeric framework.
• Utilizing the phase transition of dodecanol to control molecular permeability based on temperature and polarity.

Main Results:

• Successfully designed smart microcapsules exhibiting controlled permeability.
• Demonstrated that permeability is dependent on molecular polarity and temperature, specifically the melting point of dodecanol.
• Showcased selective diffusion of molecules soluble in molten dodecanol, with transport rates influenced by partition coefficients.

Conclusions:

• The developed smart microcapsules offer advanced regulation of transmembrane transport.
• The polarity- and temperature-dependent permeability enables triggered release applications for drug carriers.
• Potential applications include contamination-free microreactors, microsensors, and artificial cells.