Oxygen/nitrogen permselective membranes play an important role in basic research and industrial application,but its potential has not been fully developed.Among them,organic polymers have become a research hotspot because they can be used to prepare thin and large self-supporting membranes through precise molecular design.However,due to the small difference between the molecular properties of oxygen and nitrogen.So,the molecular structure of the separation membrane should be accurately designed.The main purpose of this review is to discuss appropriate macromolecular structures to prepare O2/N2 permselective membranes with excellent performance.Therefore,the O2/N2 data of pure polymer symmetric dense membranes are first extensively searched.Then,the aging performance of the polymer and the molecular structure of the membrane with excellent performance are compared.Meanwhile,the progress of molecular structure design in this field is also explored by collating and comparing the polymer membranes with the best O2/N2 separation performance reported in the literature in recent ten years.
关键词
分子结构设计/O2/N2/聚合物膜/分离上限/透氧性/选择性
Key words
molecular structure design/oxygen/nitrogen/polymer membrane/upper limit of separation/oxygen permeability/selectivity
万方数据