Surface modification of polyurethane membranes using acrylic acid vapour plasma and its effects on the pervaporation processes

Study of the influence of the acrylic acid plasma parameters on silicon and polyurethane substrates using XPS and AFM

“…Previous results on PV using PU modified membranes by AA plasma treatment [11] showed that the PV efficiency is maximum at high plasma power and short treatment times. To elucidate those finding a series of experiments varying the AA plasma power, at 1 min of treatment time, were carried out on PU.…”

“…In a PV process, the separation selectivity can be modified by changing the surface properties of the membrane by plasma and plasma polymerization reactions [8,9]. We have shown that the PV efficiency for methanol separation from methyl-t-butyl ether (MTBE) can be improved by plasma treatment [10,11]. By using acrylic acid (AA) vapor in the plasma, the treated PU membranes had higher selectivity for the separation than the O 2 and N 2 treated PUs [10].…”

Low-pressure plasma enhanced immobilization of chitosan on low-density polyethylene for bio-medical applications

“…After that, plasma was again ignited using the above mentioned operating parameters, argon was used as a main gas with the flow rate of 120 SCCM and, at the same time, acrylic acid monomer (AAc) vapor produced by the monomer reservoir at the temperature of 80°C. The obtained monomer vapor was fed into plasma regime as a shower by a copper ring that has perforation for uniform distribution of monomer vapor which leads to formation of Page 9 of 44 A c c e p t e d M a n u s c r i p t 9 acrylic coatings on the surface of LDPE films which contain high density of carboxylic functional groups [26][27][28]. Argon was used to carry the monomer vapor into the plasma regime and the monomer vapor flow rate was kept at 40 SCCM.…”

Modification of polymer membrane properties by low-temperature plasma

“…4). Hydrophilic composite membranes with a high surface concentration of COOH groups were produced by the deposition of plasmapolymerized acrylic acid films [71][72][73][74][75][76][77][78][79][80]. The wettability of the membrane surface is therewith much enhanced and, moreover, the modified membranes show high cation-exchange capacity and separation selectivity.…”

“…[76][77][78][79][80][81][82][83][84][85][86][87][88][89][90][91][92][93]. Such composite membranes have a hydrophilic surface are characterized by a high biocompatibility with blood and reduced adsorption of proteins from solutions.…”