スチレン/セルロースグラフト化生成物から得たトルエン抽出物の界面活性

概要

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Styrene was grafted onto the cellulose gel made from a phosphoric acid solution of cellulose. Toluene extraction was carried out on the graft product at room temperature after removing homo polystyrene by means of tetrahydrofuran extraction. The toluene solutions of the extracts constituted of polystyrene and cellulose were dispersed in 85% phosphoric acid, forming emulsion systems. The interfacial tension between two macroscopic phases, i.e. a clear toluene phase and a transparent phosphoric acid phase, recovered from the emulsion system after standing for 24 hours, was determined by pulling up a tensiometer rind. The tension of phosphoric acid against 0.02g/dl toluene solution was 1.4dyne/cm while the value against pure toluene was 14.0. In control experiments, the tensions against pellucid toluene solutions containing both homo polystyrene and alcogel cellulose prepared from the hydrogel cellulose were a little lower than that against pure toluene. TheSe results indicate that, although the polystyrene/cellulose mixture was surface inactive, the toluene extract was surface active. Since this activity is closely correlated to the amphiphilicity of molecule, it can be concluded that the extract is composed of　styrene/cellu1ose graft copolymer.
山形大学の論文
2000-02-15