بررسي انتخابگري يوني غشاء پوسته تخم‌مرغ

Invesstigation of Ion selec‎tivity of Chicken Egg

مهندسي نانو فناوري

Membranes are among the most important separation tools in science an‎d engineering an‎d have attracted considerable attention in recent decades due to their wide applications in water purification, materials separation, biosensors, an‎d energy systems. In this context, natural membranes have gained increasing interest because of their availability, biocompatibility, an‎d low cost. In the present study, the inner membrane of chicken eggshell was investigated as a natural, flexible, an‎d biodegradable biomembrane, with a focus on its electrochemical properties an‎d ion transport behavior. The structural characteristics of the membrane were examined using field emission scanning electron microscopy (FE-SEM), which revealed a fibrous network with irregular interconnections an‎d pores ranging from the micrometer to nanometer scale. Fourier transform infrared spectroscopy (FTIR) was used to identify the chemical composition of the membrane, confirming the presence of protein-based functional groups responsible for its mechanical properties an‎d ion adsorption capability. Electrochemical measurements an‎d current–voltage (I–V) curves demonstrated that the eggshell membrane exhibits selec‎tive ion transport behavior, showing higher conductivity for monovalent cations such as K⁺, Li⁺, an‎d Na⁺ compared to divalent cations such as Mg²⁺ an‎d Ca²⁺. The observed ionic selec‎tivity suggests the presence of biological ion transport mechanisms similar to those found in natural cellular membranes. The results indicate that, in addition to its biodegradability an‎d mechanical stability, the eggshell membrane can be considered a low-cost an‎d accessible alternative to synthetic membranes for certain research applications. Potential applications of this biomembrane include water purification an‎d desalination processes, development of biosensors, an‎d utilization in energy storage an‎d conversion systems. Furthermore, the ion transport capability of the eggshell membrane was investigated for the first time, an‎d its potential application in glucose sensor design is proposed.

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