A Study on the Preparation of Polyester Thin Films for Use in Gas Detector Windows

摘要: The thin window of a gas detector is crucial for allowing X-rays or other radiation to penetrate the detector. Today, the thin window at the entrance of the gas detector relies mainly on imports. The penetration performance of polyester films as incident windows for thin-window gas detectors was improved through the combination of plasma treatment and an organic-inorganic hybrid coating. Plasma modification provides an efficient way to achieve surface etching and polar group formation, therefore, the organic-inorganic hybrid coating fastness on the film could be efficiently increased. Scanning electron microscopy (SEM), Fourier transform infrared (FTIR), X-ray photoelectron spectroscopy (XPS), energy-dispersive X-ray spectroscopy (EDS), and contact angle measurements were employed to analyze the surface morphology, chemical composition, and hydrophilicity of the modified films. Experimental results revealed that increased plasma treatment power and duration improved surface roughness and hydrophilicity, and significantly improved coating adhesion and uniformity. X-ray fluorescence spectroscopy confirmed a marked reduction in particle loss, demonstrating the coating films’ improved suitability for high-sensitivity particle detection applications. This approach shows potential for further optimization, offering a viable pathway to advance thin-window gas detector technologies.