▎ 摘　　要

The effect of Pluronic block copolymers F127 and P123 on aqueous dispersions of graphene oxide (GO) was studied. The combination of optical microscopy, rheometry, scanning electron microscopy and X-ray diffractometry studies indicated that the introduction of Pluronics F127 and P123 could markedly change the dispersion, flow and processing behaviors of GO in water. Interestingly, the ordered-lamellar-structure composite tapes were easily fabricated by casting the GO/F127 dispersions through a doctor blade method while they were not obtained by casting the GO/P123 dispersions. The study on the intercalation structure of GO composite tapes suggested that the ordered lamellar structure of GO/F127 composite tapes originated from the anchor-buoy-type adsorption of F127 on the GO surface. In the anchor-buoy-type configuration, long ethylene oxide (EO) segments of F127 were extended out into water to form a hydration protection layer, which effectively prevented the aggregation of GO sheets. Instead, the protective effect was weaker for P123 due to its very short EO segments, and the phase-separated dispersions were present with higher GO content.