Equipment Design for Supercritical Cleavage Technology

Abstract

Thin film is a class of materials forming bonds in two dimensional plane, and graphene is the most famous among thin film. Layered crystal is the natural macroscopical collection stacked by thin film and thin film is usually obtained by exfoliating layered crystal. In practice, it is feasible to exfoliate thin film similar to graphene from layered crystal via supercritical cleavage. As supercritical fluid can diffuse into the interlayer space of layered crystal easily, once reduce the pressure of the supercritical system fast, supercritical fluid between layers expands and escapes form interlayer, consequently exfoliating layered crystal into few-layer structure. As the supercritical condition is almost strict for most of supercritical medium, it is meaningful to design a useable reaction kettle that can work in the strict supercritical environment. In this article, the experiment equipment designed is introduced and it works well in the supercritical practical cleavage process.