Abstract
In this study, we report a novel approach to fabricate an organic/inorganic magnetic hybrid system capable of self-healing, wherein a polycaprolactone-poly(furfuryl glycidyl ether) copolymer (PCLF) serving as the structure template was first synthesized, followed by the incorporation of iron oxide nanoparticles-decorated multiwalled carbon nanotubes (IONPs-MWCNTs) and 1,1′-(methylenedi-4,1-phenylene)bismaleimide (BMI) into the polymer matrix to form a covalently crosslinked hybrid network via a Diels−Alder (DA) reaction. For this system, the reactive combination of diene and dienophile from furan/maleimide, MWCNT/furan, and MWCNT/maleimide could facilely induce multiple DA reactions that imparted a versatile route to efficiently introduce IONPs-MWCNTs into the organic polymer hosts, resulting in a uniform distribution of IONPs-MWCNTs that led to a hybrid system with superparamagnetic properties. Beside the magnetic behavior, such material synergistically exhibited a superior ability for healing scratch defects via a retro-DA reaction. Therefore, this crosslinked PCLF/BMI/IONPs-MWCNTs hybrid system which exhibits multifunctional properties including superparamagnetic behavior and self-repairability can serve as an intelligent material for developing advanced electromagnetic applications.
Highlights
The concept of smart materials, such as substances which self-heal without foreign mediation, is a promising substitute to material design that is insensitive to defects to sustain safety and/or performance
PCL diol which served as a macroinitiator was first mixed with TBD catalyst, followed by the addition of a mixture of CL and Furfuryl glycidyl ether (FGE) monomers to synthesize
After the addition of CL/FGE mixing monomers, we could further observe that there was a molecular weight increase in the GPC trace from the original 2600 g mol−1 toward a higher molecular weight of 5700 g mol−1
Summary
The concept of smart materials, such as substances which self-heal without foreign mediation, is a promising substitute to material design that is insensitive to defects to sustain safety and/or performance. Several approaches for the fabrication of autonomous self-healing materials, such as microscale vascular [1,2], capsule [3,4], and reservoir [5,6] systems, have been established. The development of an efficient and versatile strategy for self-repairing materials capable of healing repeated damage events is greatly required to overcome this drawback from the irreversible systems
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