Gelatin-based nanocomposite films were prepared by casting and characterized as a sensitive hybrid material to relative humidity changes in the development of electrical sensors. Zinc oxide nanoparticles (ZnO-NPs) and glycerol (Gly) were incorporated as reinforcing and plasticizing agents, respectively, and their effects on the sensibility property of films were investigated. The proposed sensors were investigated at 25 °C. The behavior of gelatin-based films as a function of water presence was analyzed in terms of moisture content (MC), water vapor permeability (WVP), and water contact angle (WCA). The incorporation of ZnO-NPs and Gly induced morphological and structural changes in the composite films. Increased WCA (7.51%) and reduced WVP (18%) were observed for the nanocomposite films. In addition, ZnO-NPs and Gly significantly contributed to a further improvement of relative humidity sensibility of films compared to the control film. Electrical characterizations, carried out at different environments for gelatin-based films, revealed a positive responsive relative humidity behavior of materials and a sensibility of 99.47% for hybrid materials, suggesting the development of a new promising nanocomposite material for monitoring relative humidity conditions at 25 °C.

通过浇铸制备基于明胶的纳米复合薄膜，并将其表征为对电子传感器开发中相对湿度变化敏感的杂化材料。分别加入氧化锌纳米颗粒（ZnO-NPs）和甘油（Gly）作为补强剂和增塑剂，并研究了它们对薄膜敏感性的影响。建议的传感器在25°C下进行了研究。根据水分含量（MC），水蒸气渗透率（WVP）和水接触角（WCA）分析了基于明胶的薄膜的行为与水存在的关系。ZnO-NPs和Gly的引入引起复合膜的形态和结构变化。对于纳米复合膜，观察到WCA升高（7.51％）和WVP降低（18％）。此外，与对照膜相比，ZnO-NP和Gly大大有助于进一步改善膜的相对湿度敏感性。在不同环境下对明胶基薄膜进行的电学表征显示，材料的相对湿度行为具有正响应性，而杂化材料的灵敏度为99.47％，这表明开发了一种新的有前途的纳米复合材料来监测25°C的相对湿度条件C。