The present work reports the preparation of polyvinyl formal (PVF)/Titanium dioxide (TiO₂) nanocomposite films using a solution casting method followed by the characterization of the synthesized PVF/TiO₂ nanocomposite films using various analytical techniques namely FTIR, XRD, UV–vis, SEM and TGA analysis. The results obtained from different analyses confirmed that the TiO₂ NPs was fine dispersed within the PVF matrix and there exists well compatibility among the polymer matrix and the nanofiller. The pristine TiO₂ NPs based fabricated chemiresistive sensor exhibits the maximum sensitivity of 50.25% at 370 °C where as PVF/TiO₂ nanocomposite sensor showed the enhanced sensitivity of 83.75% at a relatively low operating temperature of 150 °C towards 600 ppm sulfur dioxide (SO₂) gas. The 25 wt% PVF/TiO₂ nanocomposite film sensor exhibited good sensitivity (∼83.75%), selectivity, rapid response time (66 s)/recovery time (107 s), and long-term stability of 60 days for SO₂ gas detection. The fabricated PVF/TiO₂ nanocomposite film sensors in our work possesses the advantages of low power consumption, cost-effective, and distinguished sensing abilities for SO₂ detection makes it possible for potential applications. Thus, the fabricated chemiresistive sensors based on TiO₂ NPs reinforced PVF nanocomposites films are evaluated and experimental results to show an excellent behavior towards SO₂ gas detection for industrial processes control and environmental monitoring applications.

本工作报告聚乙烯醇缩甲醛（PVF）的制备/二氧化钛（TiO ₂使用溶液流延法）纳米复合材料膜，然后将合成的PVF / TiO 2的表征₂使用各种分析技术即FTIR，XRD，UV-纳米复合薄膜可见，SEM和TGA分析。通过不同分析获得的结果证实，TiO ₂ NPs细分散在PVF基质中，并且在聚合物基质和纳米填料之间存在良好的相容性。基于原始TiO ₂ NPs的化学电阻传感器在370°C时表现出50.25％的最大灵敏度，而PVF / TiO ₂纳米复合材料传感器在150°C的较低工作温度下对600 ppm二氧化硫（SO ₂）气体显示出83.75％的增强灵敏度。25 wt％的PVF / TiO ₂纳米复合膜传感器显示出良好的灵敏度（〜83.75％），选择性，快速响应时间（66 s）/恢复时间（107 s）以及用于SO ₂气体检测的60天的长期稳定性。在我们的工作中，所制造的PVF / TiO ₂纳米复合薄膜传感器具有低功耗，经济高效的优势，并且具有出色的SO ₂检测感测能力，因此有可能用于潜在的应用。因此，制造了基于TiO _2的化学阻性传感器对NPs增强的PVF纳米复合材料薄膜进行了评估，并给出了实验结果，显示出对SO ₂气体检测的优异性能，适用于工业过程控制和环境监测应用。