Functionalization of LDPE and PP to Produce Grafted Membranes Used in Dialysis Processes. Part II

Abstract

Gamma radiation-induced grafting of N-vinyl pyrrolidone (NVP) monomers onto low-density polyethylene (LDPE) and polypropylene (PP) films was studied. The effect of monomer concentration, irradiation dose, and inhibitor concentration on the grafting percent was determined. The swelling behavior of the grafted membranes has been investigated, and it was shown that the modification of LDPE and PP films with hydrophilic monomers results in the growth of the water uptake percent. The permeability of high molecular weight materials such as creatinine and urea, through NVP-grafted membranes increased with increase in grafting percent. Thermal properties of the grafted membranes were studied by using thermo gravimetric analysis (TGA). The morphology of grafted membranes was investigated by using X-ray diffraction (XRD) and the scanning electron microscope (SEM). Structures of the grafted membranes were elucidated by spectroscopic analysis as FTIR, and their mechanical properties were also investigated.

Morphology and Thermal Characteristics of Polyamide/Monosodium Glutamate Membranes

“…In addition to certain studies [1][2][3][4][5][6][7][8][9][10][11][12], a few papers [13][14][15][16] on blend membranes also showed that selection of polymeric materials and their concentrations in membrane solution significantly affects the rejection characteristics and morphology of the membrane. A review of the literature [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] clearly shows that proper choice of polymer and additive are important for the success of a membrane process. In this paper, polyamide is selected as a polymer material for preparation of dialysis membranes.…”

“…The effect of additives such as monosodium glutamate [7,8] was investigated and the useful effect of this additive was found in cellulose acetate dialysis membrane. Maziad [9] studied the effect of gamma radiation-induced grafting on low-density polyethylene (LDPE) and polypropylene membrane films. It was found that urea and creatinine permeability through the membrane increased with the increase in grafting percent.…”

Enhancing antimicrobial properties of poly(vinylidene fluoride)/hexafluoropropylene copolymer membrane by electron beam induced grafting of N-vinyl-2-pyrrolidone and iodine immobilization

“…A number of polymer substrates such as polypropylene (PP), 18,25 polyethylene (PE), 20 polysulfone, 17 polyether ether ketone (PEEK), 27 and poly(vinylidene uoride) (PVDF), 23 were modied with PVP in several occasions. However, there no reports on the use poly(vinylidene uoride-co-hexa-uoropropylene) (PVDF-co-HFP), which is an interesting highly stable copolymer with favourable membrane forming properties suitable for imparting antimicrobial and antifouling properties by radiation induced graing of NVP.…”