含P204聚酰胺胶囊的功能性研究

功能性超薄聚酰胺胶囊作为一类新型的合成仿生膜体,具有芯材体积大、膜壁强度高、表面积容易测定及双层膜稳定性好等优点.我们采用超薄聚酰胺作为支撑体,在多孔胶囊壁中含浸双亲分子P204二-(2-乙基己基)磷酸酯],使P204分子在胶囊壁孔隙中形成复合双层结构,结果芯材的渗透速度呈现出受化学反应和外电场控制的功能性.

STUDY ON THE FUNCTION OF POLAMINE CAPSULE SOAKED IN P204

On soaking the ultrathin polyamine capsules in bis-(2-ethyl)phosphate(Abbraviated P204),we prepared the functional capsules with P204 in the porous film.P204 in the pores of the capsulewall existed in the form of bilayer structure.It acted as a prohibitor to the permeation of corematerial KCl and the permeable efficiency was decreased remarkbly.When we added Ca~(2+) to theexternal water phase,the hydrophilic headgroup of P204 reacted with Ca~(2+),and the multibilayerorder was spoiled.The permeable efficiency was increased.On treating with EDTA Ca~(2+)reactedwith EDTA,the permeable efficiency recovered its original value.Moreover,if the capsules wereput in an electric field,the permeable efficiency was increased because the multibilayer order wasspoiled with the orientation of the hydrophilic headgroup.On removing the electric field,thepermeable efficiency recovered its original value.Therefore,the capsules with P204 have reversiblefunctional permeation controlled by chemical reaction and electric field.