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个人信息Personal Information
教授
硕士生导师
任职 : 大连理工大学工程力学系副主任；大连理工大学郑州研究院院长
性别：男
毕业院校：香港科技大学
学位：博士
所在单位：力学与航空航天学院
办公地点：大连理工大学工程力学系511
联系方式：18604099383
电子邮箱：ruansl@dlut.edu.cn
Strengthening, toughening, and self-healing for carbon fiber/epoxy composites based onPPESKelectrospun coaxial nanofibers
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论文类型：期刊论文
发表时间：2021-03-05
发表刊物：JOURNAL OF APPLIED POLYMER SCIENCE
卷号：138
期号：12
ISSN号：0021-8995
关键字：fibers; composites; mechanical properties; structure-property relationships; electrospinning
摘要：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.