ABSTRACT

The presence of a secondary phase between the fibres and the matrix has proved to be a good approach for interphase tailoring for enhanced load transfer. In this regard, an optimization of the low-temperature hydrothermal growth process of ZnO-nanorods on different basalt substrates as a function of different growth times was performed. Scanning electron microscope and X-ray diffraction analysis revealed the best results in terms of homogeneity and uniformity of the ZnO nanostructures for the longest growth time, i.e., 5 h for basalt fabrics and 120 minutes for single basalt fibres. The presence of ZnO nanostructures induced a hydrophobic behaviour with contact angles up to 116° for 4- and 5-h growth processes. Fibre/matrix adhesion was characterized by single fibre pull-out tests, showing a 16% increase in interfacial strength. ZnOs added also photocatalytic properties to basalt fibres, enabling a selective removal of organic pollutant equal to 37%.

摘要

纤维和基体之间存在的第二相已被证明是用于增强负载转移的相间调整的好方法。在这方面，作为不同生长时间的函数，对不同玄武岩基底上 ZnO 纳米棒的低温水热生长过程进行了优化。扫描电子显微镜和 X 射线衍射分析表明，ZnO 纳米结构在最长生长时间（即玄武岩织物 5 小时和单根玄武岩纤维 120 分钟）的均匀性和均匀性方面的结果最好。ZnO 纳米结构的存在诱导了疏水行为，在 4 小时和 5 小时的生长过程中，接触角高达 116°。纤维/基体粘附的特征是单纤维拉出测试，显示界面强度增加了 16%。