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Strengthening, toughening, and self‐healing for carbon fiber/epoxy composites based on PPESK electrospun coaxial nanofibers
Author(s) -
Ruan Shilun,
Wei Shuya,
Gong Wenzheng,
Li Zheng,
Gu Junfeng,
Shen Changyu
Publication year - 2021
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.50063
Subject(s) - materials science , composite material , composite number , epoxy , nanofiber , flexural strength , dicyclopentadiene , toughness , self healing , microfiber , polymer , polymerization , medicine , alternative medicine , pathology
Abstract A carbon fiber/epoxy composite modified by electrospun coaxial dicyclopentadiene/poly(phthalazinone ether sulfone ketone) (DCPD/PPESK) nanofibers was successfully fabricated, and the addition of DCPD/PPESK fibrous membranes made the composite have remarkable self‐healing ability, and meanwhile effectively improve its mechanical properties. Results of polarization microscope observation and thermogravimetric analysis confirmed liquid DCPD as the healing agent was encapsulated into the PPESK coaxial nanofiber. Three‐point bending test was utilized to evaluate the mechanical properties and self‐healing effect of the composite. Experimental results indicated that the embedded nanofibers significantly improved the toughness of the composite, and maintained good mechanical properties even at low resin content. Most importantly, the flexural strength of the composite recovered to close to 90% observed 2 h after the bending failure.