Converting Capsules to Sensors for Nondestructive Analysis: From Cargo-Responsive Self-Sensing to Functional...

Area of Science:

• Materials Science
• Chemical Engineering
• Analytical Chemistry

Background:

• Capsules are widely used in various applications, including controlled release and energy storage.
• Current methods for analyzing capsule contents or integrity can be destructive or time-consuming.
• There is a need for simple, non-destructive methods for real-time capsule analysis.

Purpose of the Study:

• To develop a general concept for converting simple capsules into self-sensing devices.
• To demonstrate the utility of these converted capsule sensors for various applications.
• To enable instantaneous, non-destructive analysis of capsule contents and performance.

Main Methods:

• Incorporation of a solvatochromic fluorophore into the capsule structure.
• Utilizing excitation to observe color changes in response to core cargo.
• Applying the converted capsule sensors to controlled release studies and thermal energy storage visualization.

Main Results:

• Converted capsules function as sensors, exhibiting color changes based on core cargo.
• The sensors enable non-destructive analysis for applications like cargo retention-leakage detection.
• Demonstrated visualization of phase transitions in thermal energy storage systems.

Conclusions:

• Capsule conversion into self-sensing devices offers a versatile and simple analytical tool.
• This technology facilitates real-time, non-destructive characterization at the capsule level.
• The approach shows significant potential for enhancing applications in controlled release and energy storage.