金属有机骨架材料的薄膜化研究

Fabrication of Metal-Organic Frameworks into Membranes

金属有机骨架材料(MOFs)有着有序的孔道、丰富的结构及功能多样性,在气体分离、储存、催化和传感等方面具有潜在的应用前景,受到科学界的广泛关注。但是MOF晶体具有脆性,容易碎裂,不溶于溶剂,而且不能像高分子一样熔融后热塑成型,常用的压片加工方法得到的样品仍然较易粉化。这些性质极大地制约了MOFs在工业领域的发展和应用。在此,我们向传统的高分子材料学习,把MOFs加工成薄膜、纤维等,并发展了原位聚合法、光引发合成后聚合法、热压组装法、静电纺丝法等一系列方法。从微观结构的设计着手来研究膜的结构与性质的关系,通过不同的方法赋予MOF膜在电化学、分离、检测和安全防护等方面独特的功能和性质,并进一步探索其工业化生产的方法和可能性。

Metal-organic frameworks（MOFs）,with well-defined porosity,rich structural diversity and tailable functionality,have drawn a great deal of attention from across the scientific community due to their potential applications in the fields of gas storage,separation,catalysis and chemical sensing,etc. However,MOF crystals are often fragile,insoluble and poor in processability. Commonly processing method is to fabricate MOFs into pellet. Yet the obtained samples can easily break down into tiny particles or fine powders,which might hamper their industrial applications. Herein,we developed four methods（in-situ interweaving,photo-induced postsynthetic polymerization,hot-pressing and electrospinning） to process MOFs into membranes,films and fibers. We further set out to explore their applications in the areas of electrochemistry,separation,detection,safety protection and even the possibility in industrial production.