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Effect of electron beam irradiation on the silk fibroin fiber/poly(ε‐caprolactone) composite
Author(s) -
Li Wei,
Qiao Xiuying,
Sun Kang,
Chen Xiaodong
Publication year - 2009
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.29869
Subject(s) - fibroin , materials science , irradiation , composite material , fourier transform infrared spectroscopy , electron paramagnetic resonance , dynamic mechanical analysis , fiber , composite number , ultimate tensile strength , scanning electron microscope , polymer , silk , chemical engineering , nuclear magnetic resonance , physics , nuclear physics , engineering
The effect of electron beam irradiation on silk fibroin (SF) fiber‐reinforced poly(ε‐caprolactone) (PCL) composite was investigated by mechanical test, scanning electron microscope, dynamic mechanical thermal analysis, electron paramagnetic resonance (EPR) analysis, and Fourier transform infrared (FTIR) analysis. The results indicate that electron beam irradiation can affect the static and dynamic mechanical properties of PCL and SF/PCL composite, depending on the irradiation dose. PCL shows maximum strength and modulus at the irradiation dose of 200 kGy, and the SF/PCL composite with 45% fiber content exhibits maximum strength and modulus at the doses of 150 kGy. EPR analysis shows that during irradiation, both PCL and SF fiber can produce free radicals. Some transformations or reactions of radicals may take place between PCL and SF fiber and enhance the interfacial interaction. The microstructures of tensile fracture also show an improvement in interfacial interaction between fiber and matrix after irradiation. FTIR analysis shows that chain scissions also occur in both PCL and SF fiber during irradiation. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009