Elaboration of macrocyclic membranes based β-cyclodextrin by physical mixing and these application to dialysis organic molecules

The purpose of this study is to demonstrate a process facilitated transport of molecules of different natures through a plasticized polymer membrane (MPP). This membrane was obtained by the intercalation of an extractant, the β-cyclodextrin macrocycle (β-CD). A cellulose triacetate membrane were proposed and tested as a dialysis membranes. The cellulose triacetate polymer (TAC) not only provides the elasticity of the membrane but also acts as a plasticized through which the extracted molecule can diffuse easily because of the double functionality of the TCA. The flux and permeability coefficients of different chemical species were calculated in aqueous solution. To carry out the measurements, the method requires that samples of various solutions must be performed when the diffusion quasi-steady state has been established. The obtained membranes were characterized by (FTIR, DSC, AFM, AC) was conducted to obtain a better understanding of the transport properties in the membrane and to acquire information’s concerning the composition and interactions which may exist between the components of the membrane. The β – CD macrocycle membranes were tested as a dialysis membrane for separation of molecules. The experimental results showed the improved selectivity of the newly processed membranes for number molecules carboxylic acid, phenol. The possibility of studying the separation of carboxylic acids by the neutral membrane based on β-CD macrocycle or by increasing the thickness or by modifying the accessibility of the cavity of the macrocycle. Generally the calculated P and J confirm the influence of the size of the molecules for the three membranes employed glucose and ammoniac.