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Understand the mystery of supercritical microbubbles

Understand the mystery of supercritical microbubbles

Date of release:2018-09-20 Author: Click:

The preparation methods of micro-foamed polymer materials include batch method and continuous method. The basic principles of the two methods are consistent, that is, the polymer system saturated by supercritical fluid enters the thermodynamic unstable state through rapid pressure discharge or rapid temperature rise, thus inducing a large number of gas nuclei to form simultaneously in the polymer matrix and obtaining micropore structure. My summary of its basic process is shown in figure 1, which can be divided into the following stages:

1. To form polymer/gas saturation system under certain temperature and p