Enhanced electrochemical performance of solid-state ion sensors based on silicone rubber membranes

Characterization of All Solid State Hydrogen Ion Selective Electrode Based on PVC-SR Hybrid Membranes

“…As shown in Figure 4a and Table 2, the resistance of PVC-SR membranes gradually increases as the SR content in PVC increase from 0.0 wt % to 23.5 wt %. Because the resistance of liquid membrane based on SR is high [17]. …”

“…Leaching out of the active component and the plasticizer from the polymeric matrix causes the deterioration of the response of the electrodes and leads to limited electrode life time [7][8][9]. Up to date, several approaches were made to solve this problem including chemical anchoring of PVC membranes containing OH groups to an oxide surface [10,11], mechanical attachment of the membrane [12], photocuring techniques [13,14], and several other polymer materials [15][16][17][18][19]. Among them, SR based membranes were formulated without a plasticizer (which is owing to their low glass transition temperature), because it adhere strongly to most solid surfaces and exhibit less interference from lipophilic anions present in biological fluids.…”

Ionophore-based ion-selective potentiometric and optical sensors

“…In cases where surface properties of PVC are not favorable (e.g., when contacting physiological fluids or where different surface adhesion properties are desired), a number of other polymers have been employed including derivatized PVC [14,15,16,17], silicone rubbers [18,19], polyurethanes [20,21,22], or polystyrene [23]. Typically, these membranes are prepared by dissolving the polymer and other components in an organic solvent such as tetrahydrofuran (THF), pouring the resulting solution into a glass mold or dip-coating the cocktail onto a support, and allowing the solvent to evaporate.…”

A new solid-state silver ion-selective electrode based on a novel tweezer-type calixarene derivative

“…Several types of ASSEs have been developed, for example, by employing the coated-wire electrode (CWE) [12], an intermediary hydrogel layer containing saturated or buffered electrolytes [13,14], the membrane with silver-ligand complex [15], or conducting polymers (such as poly (pyrrole) [16][17][18][19], poly (thiophene) [20], and poly (aniline) [21,22]) electrochemically deposited on the base electrode (e.g. metal, glassy carbon [23-28]) or others [29][30][31].…”