Impact of multi-function SiO2-nanoscale ionic materials on the curing kinetics of epoxy resin: New approach to improve curing characteristics of thermoset polymers

被引：1

作者：

Farzanehfar, Negar ^{[1
]}

Taheri, Ashkan ^{[1
]}

Rafiemanzelat, Fatemeh ^{[1
,2
]}

Moini Jazani, Omid ^{[2
,3
]}

机构：

[1] Univ Isfahan, Dept Chem, Polymer Chem Res Lab, Esfahan 8174673441, Iran

[2] Univ Isfahan, Polymer Technol Res Grp, Esfahan, Iran

[3] Univ Isfahan, Fac Engn, Dept Chem Engn, Esfahan, Iran

来源：

POLYMER COMPOSITES | 2025年

关键词：

curing kinetics; epoxy resin; kinetic models; nanoscale ionic materials (NIMs); non-isothermal DSC; CURE KINETICS; THERMOGRAVIMETRY; NANOCOMPOSITES; NANOPARTICLES; MECHANISMS; ANHYDRIDE; NANOTUBES; LIQUID; DSC;

D O I：

10.1002/pc.29461

中图分类号：

TB33 [复合材料];

学科分类号：

摘要：

Epoxy resins (EP), as significant thermosetting macromolecules, are widely used in various engineering applications due to their wide range of properties. However, the poor control over curing process of EP, limits their manufacturing process. Here, a SiO2-nanoscale ionic materials (SiO2-NIMs)/EP nanocomposite was prepared. The Friedman, Kissinger, Ozawa, M & aacute;lek, and Friedman autocatalytic models were used to determine kinetic parameters and reaction models, which demonstrates that the SiO2-NIMs improve the curing characteristics of EP through an exclusive mechanism. The solvent role of SiO2-NIMs decreased viscosity and increased reactant mobility, leading to increased curing reactivity. The multi-function groups in the corona-canopy make multiple hydrogen bonding and proton transfer interactions in EP resin, leading to the autocatalytic curing mechanism and effectiveness of treatments. The frequency factor of EP increased by 9% with the addition of SiO2-NIMs. The differential scanning calorimetry tests revealed that SiO2-NIMs decreased Tonset and Tpeak compared to EP. The non-isothermal rheometric mechanical spectrometery (RMS) test indicated that SiO2-NIMs decreased the Tgel of EP resin from 75 to 71 degrees C and increased the initial storage modulus by 90.9%. This study introduces SiO2-NIMs as significant fillers to enhance control over the process conditions and curing kinetic of EP resin for advanced applications such as aerospace and satellite industries.Highlights Introducing new catalyst based on 3D-dynamic networks strategy of SiO2-NIMs. The SiO2-NIMs show great potential in improving curing characteristics of EP. The SiO2-NIMs increase the frequency factor of EP by 9%. The RMS test indicated SiO2-NIMs increased initial storage modulus by 90.9%. The Fourier transform infrared spectroscopy analysis indicated that SiO2-NIMs accelerate curing process of EP.

引用

页数：24