Bio-Based Coating Materials Derived from Acetoacetylated Soybean Oil and Aromatic Dicarboxaldehydes

Area of Science:

• Materials Science
• Polymer Chemistry
• Green Chemistry

Background:

• Soybean oil offers a renewable feedstock for developing sustainable materials.
• Traditional petroleum-based coatings contribute to environmental pollution.
• There is a growing demand for eco-friendly alternatives in the coatings industry.

Purpose of the Study:

• To synthesize and characterize acetoacetylated soybean oil from epoxidized soybean oil.
• To prepare and evaluate novel bio-based coating materials using acetoacetylated soybean oil.
• To explore the Knoevenagel condensation reaction for creating sustainable coatings.

Main Methods:

• Epoxidized soybean oil was modified via ring-opening and transesterification to yield acetoacetylated soybean oil.
• Chemical structure was confirmed using Nuclear Magnetic Resonance (NMR), Fourier Transform Infrared Spectroscopy (FTIR), and Gel Permeation Chromatography (GPC).
• Bio-based coatings were formulated by reacting acetoacetylated soybean oil with various aromatic dicarboxaldehydes and characterized for performance.

Main Results:

• Acetoacetylated soybean oil was successfully synthesized and characterized.
• The resulting bio-based coating films exhibited favorable mechanical properties.
• Key performance metrics included a glass transition temperature of 54 °C, Young's modulus of 24.91 MPa, tensile strength of 5.65 MPa, and elongation at break of 286%.

Conclusions:

• Soybean oil can be effectively utilized as a sustainable raw material for high-performance bio-based coatings.
• The Knoevenagel condensation reaction provides a viable pathway for synthesizing these eco-friendly materials.
• This research highlights a promising alternative to conventional coatings, contributing to greener material solutions.