Zinc oxide particles in needle shape were synthesized by hydrothermal route varying the reactor rotation speed (600, 1200, and 1800 rpm). The synthesized particles and commercial nanosized ZnO were characterized through X-ray diffraction (XRD), thermogravimetric analysis (TGA), Fourier-transform infrared spectroscopy (FTIR), and scanning electronic microscopy (SEM), aiming to evaluate the influence of the synthesis variable on their thermal, morphological and chemical properties. In this study, the performance of composites comprising poly(vinylidene fluoride) (PVDF) matrix and ZnO synthesized particles, and commercial nanoparticles were compared. The composites were analyzed by XRD, TGA, FTIR, SEM, dynamic-mechanical analysis (DMA), and permeability to CO₂. The results revealed that the particles synthesized even in micrometric diameter reduced the permeability much more than the commercial ZnO nanoparticles, therefore being more suitable for the application as inner pressure sheath in flexible ducts. Moreover, the ZnO needle-like particles with a lower dimension induced the PVDF β-phase to over 30%.

通过水热路线改变反应器转速（600、1200和1800 rpm）合成针状氧化锌颗粒。通过X射线衍射（XRD），热重分析（TGA），傅立叶变换红外光谱（FTIR）和扫描电子显微镜（SEM）对合成的颗粒和商业纳米级ZnO进行了表征，旨在评估合成变量的影响它们的热，形态和化学特性。在这项研究中，比较了包含聚偏二氟乙烯（PVDF）基质和ZnO合成颗粒以及商用纳米颗粒的复合材料的性能。通过XRD，TGA，FTIR，SEM，动态力学分析（DMA）和对CO _2的渗透性对复合材料进行了分析。。结果表明，即使以微米直径合成的颗粒，其渗透率也比市售ZnO纳米颗粒降低得多，因此更适合用作柔性管道中的内压护套。此外，具有较小尺寸的ZnO针状颗粒导致PVDFβ相超过30％。