A Novel Polyfunctional Polyurethane Acrylate Derived from Castor Oil-Based Polyols for Waterborne UV-Curable Coating...

Area of Science:

• Materials Science
• Polymer Chemistry
• Biomass Utilization

Background:

• Vegetable oils are gaining attention due to their renewable nature and unique molecular structures.
• Castor oil, a versatile biomass material, offers potential for developing advanced coating formulations.

Purpose of the Study:

• To synthesize a castor oil-based triacrylate structure (MACOG) for waterborne polyurethane acrylate emulsions.
• To investigate the performance enhancement of UV-cured coatings incorporating MACOG.
• To explore the application of modified castor oil in high-performance coating materials.

Main Methods:

• Chemical modification of castor oil to produce MACOG.
• Preparation of castor oil-based waterborne polyurethane acrylate emulsion.
• Fabrication and UV curing of coating materials with varying MACOG content.

Main Results:

• Increased MACOG content significantly raised the glass transition temperature (from 20.3 °C to 46.6 °C).
• Surface water contact angle improved from 73.85 °C to 90.57 °C with higher MACOG content.
• Enhanced thermal decomposition temperature, mechanical strength, and water resistance were observed.

Conclusions:

• The developed MACOG-modified waterborne polyurethane acrylate coatings exhibit superior comprehensive properties.
• This research offers a novel approach for creating high-performance coatings from renewable biomass resources.
• The study expands the utility of castor oil in the coatings industry.