In this study, chitosan(CS), nano-silicon aerogels(nSA) and tea polyphenols(TP) were used as film-forming materials and processed with ultrasonication to form films using the tape-casting method. The effects of ultrasonication time, temperature and frequency on the properties of CS/nSA/TP film were explored via material property testing. The results of response surface showed that the maximum tensile strength of the film was 4.036 MPa at ultrasonication time(57.97 min), temperature(37.26 °C) and frequency(30 kHz). The maximum elongation at break of the film was 279.42 % at ultrasonication time(60.88 min), temperature(39.93 °C) and frequency(30 kHz). Due to cavitation and super-mixing effects, ultrasonication may make the surface of the film smoother and easier to degrade. After ultrasonication, TPs were protected by the 3D network structure composed of CS and nSA. Ultrasonication improved the antioxidant and antibacterial properties of the film. These results show that ultrasonication is an effective method to improve the properties of films.

本研究以壳聚糖（CS）、纳米硅气凝胶（nSA）和茶多酚（TP）为成膜材料，采用流延法进行超声处理成膜。通过材料性能测试探讨了超声时间、温度和频率对CS/nSA/TP薄膜性能的影响。响应面结果表明，在超声时间（57.97 min）、温度（37.26 ℃）和频率（30 kHz）下，薄膜的最大拉伸强度为4.036 MPa。在超声时间（60.88 min）、温度（39.93 °C）和频率（30 kHz）下，薄膜的最大断裂伸长率为279.42 %。由于空化和超混合效应，超声处理可以使薄膜表面更光滑，更容易降解。超声波处理后，TP 受到由 CS 和 nSA 组成的 3D 网络结构的保护。超声波处理改善了薄膜的抗氧化和抗菌性能。这些结果表明，超声处理是改善薄膜性能的有效方法。