一种快速检测芳香聚酰胺复合膜表面纳米层重量的方法

Rapid detection of the weight of Nano surface functional layer of Thin-Film composite membrane

以交联芳香聚酰胺作为分离皮层的反渗透复合膜因具有优越的分离性能和良好的化学稳定性而被广泛应用于脱盐和净水领域。聚酰胺功能皮层的结构和性质对反渗透膜的分离性能起关键作用,其质量和厚度是分离膜的重要表征参数。由于该功能层是在两层复合底膜上界面聚合生成的纳米尺度薄膜,其质量快速简便的表征存在技术难度。本实验结合石英晶体微天平(QCM)技术开发了傅里叶红外光谱衰减全反射(FTIR-ATR)方法,可以实现快速检测表面纳米薄膜层的质量,满足研发、生产和应用的快速检测需求。该方法也可扩展到其他类似结构的纳米薄膜的研究和质控应用中。

The reverse osmosis composite membrane with cross-linked aromatic polyamide as separation layer is widely used in desalination and water purification field for its excellent separation performance and good chemical stability.The structure and properties of polyamide functional layer play a key role in the separation performance of reverse osmosis membrane.The Fourier transfer infrared spectroscopy with attenuated total reflectance(FTIR-ATR)method is developed,combining with the quartz crystal microbalance(QCM)technology,which can rapidly and efficiently detect the quality of nano film layer on the surface and meet the needs of research,production and application.