Effect of Nanoscale Surface Modification on the Interfacial Mechanics of Carbon Fibers

IF 4.3 3区 材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY
Sriraj Srihari, Rahul Sathyanath, Sreeram K. Kalpathy, Marwan Al-Haik, Sirish Namilae
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Abstract

Enhancing fiber surfaces through in situ growth of nanomaterials is known to improve fiber composite properties by enhancing the interface between the fiber and matrix. In this study, hydrothermal processes are used to achieve two types of interfacial modification for carbon fiber: zinc oxide nanowires (ZnO NWs) and nickel-based metal–organic frameworks (MOF). The interfacial strengths are evaluated using single fiber push-in tests via nanoindentation and the interfaces are analyzed through dynamic modulus-mapping. It is found that ZnO modification increases the interface strength by 9.40%, while MOF modification yields an even higher improvement of 16.34%. The load-displacement plots exhibit distinctive inflection points, elucidated through microstructural observations. Examining the modulus map of the interface region, a transition in the storage modulus from the fiber to the matrix is identified. A capillary flow-based model is developed to explain the resin penetration through nanoscale features. The findings reported here indicate that the timescale for resin absorption is significantly shorter than the curing timescales for the surface modifications explored in this study.

Abstract Image

Abstract Image

纳米级表面改性对碳纤维界面力学的影响
众所周知,通过原位生长纳米材料来增强纤维表面,可以改善纤维与基体之间的界面,从而提高纤维复合材料的性能。本研究采用水热工艺对碳纤维进行了两种界面改性:氧化锌纳米线(ZnO NWs)和镍基金属有机框架(MOF)。通过纳米压痕法进行的单根纤维推入试验评估了界面强度,并通过动态模量绘图对界面进行了分析。结果发现,氧化锌改性使界面强度提高了 9.40%,而 MOF 改性则提高了 16.34%。载荷-位移图显示出明显的拐点,这是由微观结构观察所阐明的。通过观察界面区域的模量图,可以发现存储模量从纤维向基体的过渡。建立了一个基于毛细管流动的模型来解释树脂通过纳米级特征的渗透。本文报告的研究结果表明,对于本研究中探讨的表面改性,树脂吸收的时间尺度大大短于固化时间尺度。
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来源期刊
Advanced Materials Interfaces
Advanced Materials Interfaces CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
8.40
自引率
5.60%
发文量
1174
审稿时长
1.3 months
期刊介绍: Advanced Materials Interfaces publishes top-level research on interface technologies and effects. Considering any interface formed between solids, liquids, and gases, the journal ensures an interdisciplinary blend of physics, chemistry, materials science, and life sciences. Advanced Materials Interfaces was launched in 2014 and received an Impact Factor of 4.834 in 2018. The scope of Advanced Materials Interfaces is dedicated to interfaces and surfaces that play an essential role in virtually all materials and devices. Physics, chemistry, materials science and life sciences blend to encourage new, cross-pollinating ideas, which will drive forward our understanding of the processes at the interface. Advanced Materials Interfaces covers all topics in interface-related research: Oil / water separation, Applications of nanostructured materials, 2D materials and heterostructures, Surfaces and interfaces in organic electronic devices, Catalysis and membranes, Self-assembly and nanopatterned surfaces, Composite and coating materials, Biointerfaces for technical and medical applications. Advanced Materials Interfaces provides a forum for topics on surface and interface science with a wide choice of formats: Reviews, Full Papers, and Communications, as well as Progress Reports and Research News.
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