PREPARATION OF BILAYER-INTERCALATED CLAY FILMS AND PERMEATION CONTROL RESPONDING TO TEMPERATURE, ELECTRIC-FIELD, AND AMBIENT PH CHANGES PERMEABILITY CONTROLLABLE MEMBRANES .10.
PREPARATION OF BILAYER-INTERCALATED CLAY FILMS AND PERMEATION CONTROL RESPONDING TO TEMPERATURE, ELECTRIC-FIELD, AND AMBIENT PH CHANGES PERMEABILITY CONTROLLABLE MEMBRANES .10.
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DOI：
10.1021/la00088a013
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发表时间：
1989-07-01
期刊：
影响因子：
3.9
通讯作者：
SHIMIZU, A
中科院分区：
文献类型：
--
作者：
OKAHATA, Y;SHIMIZU, A
用两亲性阳离子双分子层（2Cn N+2Cl，n= 12-18，3Cl 2N +3Cl）交换层状粘土蒙脱石的阳离子，制备了脂质双分子层插层粘土膜。所获得的膜在宽的温度和pH范围内在水溶液中是物理稳定的（不溶胀）。通过粘土膜的水溶性非离子荧光探针（NQi）的渗透被改变的相变的插层双层和通过间歇施加的电场（2.5 V，直流电）横跨膜。在由单链铵两亲物（C16 N +3C 1）制备的粘土膜的情况下，其在夹层中形成单层结构，渗透率不受相变和电场的影响。当使用二烷基铵两亲物（2C 16 N +2C 1）和具有解离阳离子头部基团（2C 16-NH3+）的两亲物的混合物作为插层时，由于2C 16-NH3+双层结构改变为中和的2C 16-NH 2两亲物，膜的渗透性通过环境pH在7和11之间变化而可逆地控制。
Lipid bilayer-intercalated clay films were prepared by exchanging their cations of layer-typeclay montmorillonite for cationic bilayer-forming amphiphiles (2C „N+ 2C1, n= 12-18, and 3C12N+ 3Ci). The obtained film was physically stable (not swelled) in aqueous solutions over a wide temperature and pH range. Permeation of a water-soluble nonionic fluorescent probe (NQi) through the clay film was changed by the phase transition of the intercalated bilayers and by the intermittent application of an electric field (2.5 V, direct current) across the film. In the case of the clay film prepared from a single-chain ammonium amphiphile (C16N+ 3C1), which forms a monolayer structure in the interlayer, permeability was not affected by the phase transition and the electric field. When the mixture of dialkylammonium amphiphiles (2C16N+ 2Cj) and amphiphiles having dissociative cationic head groups (2C16-NH3+) was employed as an intercalation, permeability of the film was reversibly controlled by ambient pH changes between 7 and 11 due to the structure change of 2Ci6-NH3+ bilayers to neutralized 2C16-NH2 amphiphiles.