期刊
POLYMER
卷 245, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2022.124734
关键词
Functionalaized multi walled carbon nabotubes; Self-healing nanocomposite; Diels-alder bonding
资金
- SERB, a statutory body of DST-India, under DST-SERB Program 2020 [EEQ/2020/000105]
The study successfully developed a self-healing Bm-MWCNT/DA-epoxy nanocomposite with validated reinforcement and repair effects, achieving significant improvements in crack healing efficiency and mechanical properties.
Developing the self-healing functionality in polymers without affecting its inherent properties is of great practical significance. In this work, first, Bm-MWCNTs nano-particle is prepared by infusing maleimdie moiety on the surface of multiwalled carbon nanotubes (MWCNT). Then, thermally reversible self-healing epoxy resin is pre -pared using furan-malemide group through Diels-Alder reaction. Finally, Bm-MWCNT/DA-epoxy nanocomposite with self-healing properties is synthesized. Bm-MWCNTs act as a strengthening and repairing agent in epoxy composites. The architecture and thermal stability of Bm-MWCNTs are characterized with FTIR and TG-DTA respectively. FE-SEM images validated, uniform dispersion and bismalemide grafting on MWCNTs. The effec-tive DA-rDA bonds association in Bm-MWCNT/DA-epoxy nano-composite was validated by exo-endothermic peaks in TG-DSC data. The self-healing characterstics of Bm-MWCNT/DA-epoxy nanocomposite were evalu-ated through TDCB specimen and reported 89% of crack healing efficiency. With 1 wt% of Bm-MWCNT rein-forcement, the tensile strength and modulus improved by 202%, 101% respectively compared to neat sample.
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