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Bio-Based Fluorescent Epoxies: Emission Control through Molecular Packing and Phase Separation.

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Summary

This summary is machine-generated.

Agricultural waste is converted into high-performance fluorescent epoxy resins using coumaric acid epoxy (CE) and ferulic acid epoxy (FE). These sustainable bio-based resins offer tunable photoluminescence and excellent thermomechanical properties for advanced applications.

Keywords:

bio‐based epoxy resins coumaric acids ferulic acids fluorescence emissions sustainable materials

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Area of Science:

Materials Science
Polymer Chemistry
Sustainable Chemistry

Background:

Agricultural waste valorization is crucial for a circular economy.
Development of high-performance, bio-based fluorescent materials is an ongoing challenge.
Existing fluorescent epoxy resins often involve complex synthesis or additives.

Purpose of the Study:

To demonstrate a sustainable method for producing fluorescent epoxy resins from agricultural waste.
To investigate the photoluminescent and thermomechanical properties of bio-based epoxy blends.
To compare the performance of bio-based resins with commercial counterparts.

Main Methods:

Direct blending of coumaric acid epoxy (CE) and ferulic acid epoxy (FE) derived from corn stover.
Characterization of photoluminescence properties (emission maxima, intensity).
Evaluation of thermomechanical properties (flexural modulus, glass transition temperature, storage modulus, impact toughness) and phase behavior using light microscopy.

Main Results:

Tunable photoluminescence achieved, with emission maxima shifting from 299 nm to 841 nm by varying FE content (0-33 wt%).
CE-FE blends exhibited superior or comparable thermomechanical properties to commercial bisphenol A diglycidyl ether (BADGE)-based resins.
Commercial BADGE blends showed phase separation and reduced impact toughness at higher FE concentrations, unlike the CE-FE blends.
Enhanced fluorescence intensity in CE-rich blends was linked to compact aromatic structures limiting nonradiative decay.

Conclusions:

A straightforward blending approach enables the sustainable production of high-performance fluorescent epoxy resins from agricultural waste.
These bio-based resins offer tunable optical properties and robust thermomechanical performance, outperforming commercial options in certain aspects.
The developed materials are suitable for integration into biorefineries with potential applications in optical sensors, bioimaging, and smart coatings.