In view of the excellent mechanical properties of ultra-high strength to density ratio, super elasticity, pore volume and large energy absorption capacity, a three-dimensional (3D) pore material has been widely used in catalytic field of gas separation, sensing, tissue engineering, in many battery technology, ion exchange, micro-electronics, medical diagnostics and production, etc. play an important role. Recently, the School of Mechanical Engineering academician and professor Jiang Chong Wei Xueyong Germany Xi\’an Jiaotong University proposes a production method based on voice-activated polymer bubbles focused acoustic waves, and the preparation of polyvinyl alcohol (PVA) foam as a template, by freeze – thaw cycles, for the magic bubbles, pores finally made lipophilic gelling material having superhydrophobic and polyvinyl alcohol (PVA).
preparation of microbubbles based on a surface acoustic wave
in this study, a method for preparing a surface acoustic wave focused voice based on the bubble, applicable not only to produce oil gas microbubbles, but are also suitable for water generating gas microbubbles. Microbubbles size can be adjusted in real time by adjusting the input frequency or driving voltage of the focused acoustic wave. This method can achieve regulation of the size of microbubbles in the microsecond time, which can range from 10μm regulation to hundreds of microns.
Manufacturing of polyvinyl alcohol (PVA) hydrogel material pores