《分离膜孔径测试方法 气体渗透法（英文版）》标准号是多少

“分离膜孔径测试方法 气体渗透法（英文版）”的标准号是：GB/T 42269-2022E

GB/T 42269-2022E《分离膜孔径测试方法 气体渗透法（英文版）》由国家市场监督管理总局 国家标准化管理委员会于2022-12-30发布，并于2023-04-01实施。

该标准的起草单位为中国科学院大连化学物理研究所、天邦膜技术国家工程研究中心有限责任公司、山东招金膜天股份有限公司、河海大学、三达膜科技(厦门)有限公司、贝士德仪器科技(北京)有限公司、佛山市顺德区质量技术监督标准与编码所、广州先进技术研究所、天津膜天膜科技股份有限公司等；起草人是王丽娜、曹义鸣、徐徜徉、王新艳、龚海晨、丘助国、柳剑峰、王芳、陈顺权、吕晓龙、邹凯伦、裴志强、吴福根、王晓林、刘铭辉、薛进、蔡婷、叶洋、曹春、魏汉辉、许以农、王涛、郑海荣、朱阳、陈本华、沈旭丰、曹毅、胡群辉、于水利、王瀚漪、马兵、介兴明、高旭、张红斌等。

“分离膜孔径测试方法 气体渗透法（英文版）”介绍

The gas permeation method is an analytical technique utilized in the characterization of separation membranes, specifically designed to measure the pore size of such materials. This process involves exposing the membrane under examination to a stream of gas at different pressures, monitoring the rate and volume of gas passing through the membrane's pores over time. By analyzing this flow, one can calculate the average pore size based on the resistance encountered by the gas molecules as they permeate through the material structure.

This method relies on several key principles of gas dynamics and fluid mechanics, including the Knudsen diffusion model and the viscous flow mechanism, both of which describe the interactions between gas molecules and the walls of the pores they traverse. The gas permeation setup typically incorporates precise control over variables like gas pressure, temperature, and flow rate, ensuring accurate determinations of pore characteristics. Furthermore, it is capable of discerning differences between open and closed pores within the membrane, offering insights into factors that might affect the filtration efficiency or selectivity of the membrane.

As a non-destructive and versatile testing approach, the gas permeation method provides valuable information for industries where separation membranes play a critical role, such as in water purification, food processing, pharmaceutical manufacturing, and chemical engineering. It allows for quality control, optimization of membrane performance, and development of improved separation technologies, ultimately enhancing the overall efficiency of processes reliant on precise sieving capabilities.