Preparation And Compatibilization Of Janus Nanosheets

Janus material is a composite material with different structure, chemical groups or polymers on both sides. The Janus materials with no polymers in the surface can be selectively grafted onto different polymers become Janus polymer brush, combining the advantage of polymer brush and Janus materials. In the oil/water interface, Janus materials can exist stably and stability the emulsion. In the solid-solid interface, Janus polymer brush can also be stable and reduce the micro phase region and compatibilizing role. Currently, the Janus materials research mostly focus on the spherical Janus particles, the flaky Janus particles is rarely, this paper aims to silica for subject of Janus films based on using anionic polymerization to obtain selective graft of Janus polymer brush.In this paper, two ways was used to grafted polymer to Janus nanosheets, the first is that the lithium ions terminated polymer without terminated which was polymerized by the anion polymerization grafted onto Janus nanosheets by nucleophilic substitution of a halogen element which was modified on the Janus nanosheets, the second is through the double bond on the surface and anion initiator was introduced to initiate monomer polymerization, grafting PE/PBd, PI/PBd onto Janus nanosheets. EDX, FI-IR, NMR, cross section TEM, GPC and TGA was used to test the structure characterization of Janus nanosheets and the grafted polymer, we found that the grafted density was better with surface initiated.We study the influence of the grafted Janus nanosheets in polyethylene/polybutadiene, polyisoprene/ polybutadiene blends. In polyethylene/polybutadiene blends can obviously observed that with the increase of Janus tablets, island phase small uniform, continuous phase concentration, in the increase of poly isoprene/polybutadiene blends continuously accompanying with the Janus tablets continuous phase transitions in dense, when it increased to a maximum after compatibilization effect is no longer obvious, instead of presenting the downward trend, through the experiment found the best proportion of adding.