Ahmad Shabir, Ullah Hameed, Rehman Zia Ur, Nawaz Mohsan, Uddin Imad, Parkash Anand, Alamri Hatem R, Alsaiari Norah Salem, Javed Muhammad Sufyan
Department of Chemistry, Islamia College University, Peshawar 25120, Pakistan.
Department of Chemistry, Hazara University, Mansehra 21120, Pakistan.
Nanomaterials (Basel). 2022 Aug 15;12(16):2796. doi: 10.3390/nano12162796.
Nanocomposites of polyvinylidene fluoride (PVDF) with dimensional (1D) cobalt oxide (CoO) and -MWCNTs were prepared successfully by the solution casting method. The impact of 1D CoO filler and 1D CoO/-MWCNTs co-fillers on the structural, thermal, and electrical behavior of PVDF were studied. The crystal structural properties of pure PVDF and its nanocomposite films were studied by XRD, which revealed a significant enhancement of β-phase PVDF in the resulting nanocomposite films. The increase in β-phase was further revealed by the FTIR spectroscopic analysis of the samples. TG, DTA, and DSC analyses confirmed an increase in thermal stability of PVDF with the addition of nano-fillers as well as their increasing wt.%. From impedance spectroscopic studies, it was found that the DC conductivity of PVDF increases insignificantly initially (up to 0.1 wt.% of nano-fillers addition), but a significant improvement in DC conductivity was found at higher concentrations of the nano-fillers. Furthermore, it was observed that the DC conductivity decreases with frequency. The increase in DC conductivity corresponded to the strong interactions of nano-fillers with PVDF polymer chains.
通过溶液浇铸法成功制备了聚偏氟乙烯（PVDF）与一维（1D）氧化钴（CoO）和多壁碳纳米管（MWCNTs）的纳米复合材料。研究了一维CoO填料和一维CoO/MWCNTs共填料对PVDF结构、热性能和电学性能的影响。通过X射线衍射（XRD）研究了纯PVDF及其纳米复合薄膜的晶体结构性能，结果表明所得纳米复合薄膜中β相PVDF有显著增强。样品的傅里叶变换红外光谱（FTIR）分析进一步揭示了β相的增加。热重分析（TG）、差示热分析（DTA）和差示扫描量热法（DSC）分析证实，随着纳米填料的加入及其重量百分比的增加，PVDF的热稳定性提高。从阻抗谱研究发现，PVDF的直流电导率最初增加不显著（纳米填料添加量高达0.1 wt.%），但在纳米填料浓度较高时直流电导率有显著提高。此外，观察到直流电导率随频率降低。直流电导率的增加对应于纳米填料与PVDF聚合物链之间的强相互作用。
