UNDERSTANDING THE FORMATION MECHANISM OF THE 3D NANOSTRUCTURE FOR POLYSTYRENE-BASED HIERARCHICAL POROUS CARBON

摘要

Introduction Crosslink induced polymer sol-gel phase separation technology has been extensively used to fabricate nanoporous polymers and related carbon materials with well-defined nanomorphology and pore structure. But there are few reports focus on the sol-gel development process and detect the key factor that affect the nanopore inheritability of porous gel. This basic scientific issue is very essential to establish the preparation theory of this system and further guide the nanostructure design. Very recently, our group developed a novel polymer sol-gel method to fabricate various nanoporous polymers and carbon ~([1-3]). This method can combine emulsion polymerization and SI-ATRP with F-C crosslink technology, and may open a new way to design porous materials with various nanostructures. And simultaneously, it supplies an appropriate model to investigate the generally crosslink-induced sol-gel process and clarify the basic science issue in it. In this present work, porous PS gels with varied -CO-crosslinking densities were fabricated via tune .the F-C reaction time. The sol-gel phase separation mechanism, carbonization process and nanostructure control techniques are clarified.