ArticlePolymers2026
Performance of Multi-Gradient Biomimetic POSS-Toughened CFRP Laminates with a Pearl-Inspired Hard-Soft Interfacial Architecture.
Article in Polymers, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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6 authors.
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Abstract
Carbon-fiber-reinforced epoxy (CFRP) composites are widely used in aerospace structures because of their high specific strength and modulus; however, matrix cracking and interlaminar delamination induced by low-velocity impact compromise their structural safety. To overcome the difficulty of simultaneously improving interfacial strength and impact resistance through uniform nanomodification, a pearl-inspired gradient interfacial architecture incorporating a through-thickness distribution of polyhedral oligomeric silsesquioxane (POSS) was developed and compared with unmodified and uniformly modified CFRP laminates. SEM/EDS, TEM, double-cantilever-beam testing, low-velocity impact testing, compression-after-impact (CAI) testing, and micro-CT were combined to examine the effects of POSS spatial distribution on interfacial morphology, Mode I interlaminar fracture toughness, and impact-damage evolution. POSS incorporation increased interfacial roughness and produced nanoscale POSS-rich domains within the epoxy matrix. Although uniform addition of 0.5 wt% POSS increased the mean CAI strength to 142 MPa, the Mode I interlaminar fracture toughness decreased to 0.479 kJ·m
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