Thermally Switchable Chitosan-Polycarbamate Cross-linked Epoxy Resin Composites with Enhanced Mechanical Strength and UV-A Shielding DOI

Elavazhagan Gunasekaran,

Sumalatha Vasam, Sankar Govindarajan

et al.

Industrial & Engineering Chemistry Research, Journal Year: 2025, Volume and Issue: unknown

Published: March 24, 2025

The growing demand for sustainable and high-performance materials has driven the need eco-friendly alternatives in coatings polymer industries. This study introduces a novel approach to enhancing epoxy using chitosan-based polycarbamate derivatives synthesized via nonisocyanate route, offering safer more pathway generating isocyanates. successful formation of isocyanate from was confirmed by experimental techniques such as CO2 evolution, TGA, DSC, along with theoretical validation Dmol3 transition state analysis. generated improved mechanical, chemical, thermal properties made diglycidyl ether bisphenol A (DGEBA) triethylenetetramine (TETA). Cure time analysis showed that incorporating chitosan-blocked significantly increased cross-linking density, resulting than twice tensile strength modified films (51 MPa) compared unmodified ones (24 MPa). Additionally, exhibited better flexibility, stiffness, chemical resistance, UV stability, lower surface wettability. system presents scalable, cost-effective solution industries seeking greener protective coatings, adhesives, advanced applications. These findings pave way industrial adoption biobased, materials, promoting environmental sustainability without compromising functionality.

Language: Английский

Green Biosynthesis of Nanoparticles Using Plant Extracts: Mechanisms, Advances, Challenges, and Applications DOI
Great Iruoghene Edo, Alice Njolke Mafe,

Ali B. M. Ali

et al.

BioNanoScience, Journal Year: 2025, Volume and Issue: 15(2)

Published: March 13, 2025

Language: Английский

Citations

0
Thermally Switchable Chitosan-Polycarbamate Cross-linked Epoxy Resin Composites with Enhanced Mechanical Strength and UV-A Shielding DOI

Elavazhagan Gunasekaran,

Sumalatha Vasam, Sankar Govindarajan

et al.

Industrial & Engineering Chemistry Research, Journal Year: 2025, Volume and Issue: unknown

Published: March 24, 2025

The growing demand for sustainable and high-performance materials has driven the need eco-friendly alternatives in coatings polymer industries. This study introduces a novel approach to enhancing epoxy using chitosan-based polycarbamate derivatives synthesized via nonisocyanate route, offering safer more pathway generating isocyanates. successful formation of isocyanate from was confirmed by experimental techniques such as CO2 evolution, TGA, DSC, along with theoretical validation Dmol3 transition state analysis. generated improved mechanical, chemical, thermal properties made diglycidyl ether bisphenol A (DGEBA) triethylenetetramine (TETA). Cure time analysis showed that incorporating chitosan-blocked significantly increased cross-linking density, resulting than twice tensile strength modified films (51 MPa) compared unmodified ones (24 MPa). Additionally, exhibited better flexibility, stiffness, chemical resistance, UV stability, lower surface wettability. system presents scalable, cost-effective solution industries seeking greener protective coatings, adhesives, advanced applications. These findings pave way industrial adoption biobased, materials, promoting environmental sustainability without compromising functionality.

Language: Английский

Citations

0