Journal
COMPOSITES SCIENCE AND TECHNOLOGY
Volume 106, Issue -, Pages 32-38Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2014.10.021
Keywords
Fibres; Polymer-matrix composites (PMCs); Environmental degradation; Interface; Interfacial strength
Categories
Funding
- National High Technology Research and Development Program of China (863 Program) [2012AA03A212]
- Chang Jiang Scholars Program
- National Science Foundation of China [51073047, 91016015, 51103031, 51173032, 51273050]
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Atomic oxygen (AO) is a dominant component of the low earth orbit and can erode most spacecraft materials. In this work, both silane and graphene oxide (GO) were introduced onto poly(p-phenylene benzobisoxazole) (PBO) fibers to prevent AO from penetrating into the interface of PBO fiber/epoxy composites. The microstructure, mechanical properties and AO erosion resistance of PBO fibers before and after modification were investigated. Experimental results revealed that the GO was successfully grafted onto PBO fibers using 3-aminopropyltrimethoxysilane (APTMS) as the bridging agent. The surface roughness (R-a) and wettability of the obtained hybrid fibers (PBO-APTMS-GO) were obviously increased in comparison with those of an untreated one. In addition, PBO-APTMS-GO showed simultaneously remarkable enhancement in interfacial shear strength (IFSS) and AO erosion resistance. Meanwhile, single filament tensile strength (TS) had no obvious decrease after the grafting processes. We believe the facile and effective method may provide a novel interface design strategy for developing multifunctional fibers. (C) 2014 Elsevier Ltd. All rights reserved.
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