Issue 20, 2022, Issue in Progress

Curing behavior of sodium carboxymethyl cellulose/epoxy/MWCNT nanocomposites

Abstract

The surfactant-assisted preparation of carbon nanotube (CNT)/polymer composites has attracted the attention of scientists around the world. Here, CNT/epoxy nanocomposites were prepared using sodium carboxymethyl cellulose (CMC). The effect of CMC on the curing behaviors of epoxy resin (E44) and CNTs/E44 was studied using differential scanning calorimetry (DSC). The curing kinetics of the CMC/CNTs/E44 systems were examined using methods where the activation energy (E) is a constant and where E is a variable, respectively. The change of E with the conversion (α) was calculated using the Starink isoconversional method. For the E44 system, a significant variation of E was observed when the conversion increased from 0.05 to 0.95. The E variable method was introduced to this system to describe this phenomenon. In contrast to the method where E is a constant, the E variable method has better agreement with the experimental data. With these two methods, the curing kinetics of the CMC/CNTs/epoxy system can be understood comprehensively and accurately. Ultimately, the dynamic mechanical properties of neat E44, CMC/E44 and CMC/CNTs/E44 were investigated and compared, which showed that CMC/E44 had a higher storage modulus (Em) than the neat E44 and CMC/CNTs/E44 systems, and the CMC/CNTs/E44 system had a higher glass transition temperature (Tg) and damping factor (tan δ) than the neat E44 and CMC/E44 systems.

Graphical abstract: Curing behavior of sodium carboxymethyl cellulose/epoxy/MWCNT nanocomposites

Article information

Article type
Paper
Submitted
25 Mar 2022
Accepted
12 Apr 2022
First published
25 Apr 2022
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2022,12, 12427-12435

Curing behavior of sodium carboxymethyl cellulose/epoxy/MWCNT nanocomposites

J. Zhang, L. Tan, H. Dong, W. Qu and J. Zhao, RSC Adv., 2022, 12, 12427 DOI: 10.1039/D2RA01943D

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