Isocyanate-Free Polyurethane Coatings with Silicon-Based Compound: A Green Approach for High-Performance Coatings
Category
Sciences and Technology
Department
Material Science
Student Status
Graduate
Research Advisor
Dr. Ram Gupta
Document Type
Event
Location
Student Center Ballroom
Start Date
10-4-2025 2:00 PM
End Date
10-4-2025 4:00 PM
Description
The development of sustainable and environmentally friendly polyurethane coatings has garnered significant attention in recent years. This research focuses on the development of isocyanate-free coatings derived from carbonated soybean oil (CSBO) using a solvent- and catalyst-free approach. The coatings were synthesized by reacting CSBO with ethylenediamine (EDA) and varying weight percentages of 3- aminopropyltriethoxysilane (APTES) which was added to enhance the coating property as it contains silicon in it. to evaluate their mechanical and thermal properties. FTIR confirmed the successful formation of urethane linkages, with a significant reduction in C=O peak intensity after 48 hours of curing, indicating enhanced crosslinking. Mechanical testing revealed that films containing 10 wt.% APTES exhibited the highest tensile stress of 1.29MPa due to optimal crosslink density, which balanced rigidity and flexibility. The best elongation at break was observed at 15 wt.% APTES, attributed to increased molecular interactions that allowed better energy dissipation under stress. TGA indicated that coatings with 15 wt.% APTES had the highest degradation temperature at 7.01 oC, suggesting a well-structured polymer matrix with improved thermal resistance. Tensile adhesion tests on oak wood substrates showed maximum bonding strength at 3.6MPa of 10 wt.% APTES, owing to optimal silane interaction with the substrate, promoting better adhesion. These findings suggest that silicon-modified bio-based polyurethane coatings can serve as sustainable alternatives to traditional isocyanate-based systems while achieving superior mechanical and thermal performance. Also, we are working on some other characterizations such as coating different materials like wood, stainless steel, and glass; after coating, we'll check the effect of watercolors, ink, and chemical resistance on the different coated materials.
Isocyanate-Free Polyurethane Coatings with Silicon-Based Compound: A Green Approach for High-Performance Coatings
Student Center Ballroom
The development of sustainable and environmentally friendly polyurethane coatings has garnered significant attention in recent years. This research focuses on the development of isocyanate-free coatings derived from carbonated soybean oil (CSBO) using a solvent- and catalyst-free approach. The coatings were synthesized by reacting CSBO with ethylenediamine (EDA) and varying weight percentages of 3- aminopropyltriethoxysilane (APTES) which was added to enhance the coating property as it contains silicon in it. to evaluate their mechanical and thermal properties. FTIR confirmed the successful formation of urethane linkages, with a significant reduction in C=O peak intensity after 48 hours of curing, indicating enhanced crosslinking. Mechanical testing revealed that films containing 10 wt.% APTES exhibited the highest tensile stress of 1.29MPa due to optimal crosslink density, which balanced rigidity and flexibility. The best elongation at break was observed at 15 wt.% APTES, attributed to increased molecular interactions that allowed better energy dissipation under stress. TGA indicated that coatings with 15 wt.% APTES had the highest degradation temperature at 7.01 oC, suggesting a well-structured polymer matrix with improved thermal resistance. Tensile adhesion tests on oak wood substrates showed maximum bonding strength at 3.6MPa of 10 wt.% APTES, owing to optimal silane interaction with the substrate, promoting better adhesion. These findings suggest that silicon-modified bio-based polyurethane coatings can serve as sustainable alternatives to traditional isocyanate-based systems while achieving superior mechanical and thermal performance. Also, we are working on some other characterizations such as coating different materials like wood, stainless steel, and glass; after coating, we'll check the effect of watercolors, ink, and chemical resistance on the different coated materials.
