A new polymeric silicone hydrogel for medical applications: synthesis and properties

Abstract

A novel silicone hydrogel polymeric material is developed. The preparation method is based on sequential interpenetrating network synthesis. A silicone network is obtained by the interaction between two siloxane oligomers comprising hydride and vinyl functional groups. A hydrophilic network is prepared by radical copolymerization of hydrophilic monomers (N-vinyl pyrrolidone, N,N-dimethylacrylamide) and crosslinking agent (ethylene glycol dimethacrylate). In the hydrated state the developed material has high mechanical properties, transparency, hydrophilicity, oxygen and water permeability. The developed new technology affords obtaining a silicone hydrogel material with a good wettability without additional chemical or plasma surface treatment.

Removal of Co(II), Cu(II) and Pb(II) ions by polymer based 2-hydroxyethyl methacrylate: thermodynamics and desorption studies

“…All surfaces were dried at 105°C for 24h, then washed with distilled water several times to remove dust and other water-soluble impurities. The prepared surfaces were similar to other referenced [31-34]. P(HEMA) and P(MMA-HEMA) were cut in 1 cm of diameter and 0.5 mm thick pieces.…”

The study of adsorption characteristics Cu2+ and Pb2+ ions onto PHEMA and P(MMA-HEMA) surfaces from aqueous single solution

“…Then all surfaces are dried at 105 • C for 24 h. Also all surfaces were washed with distilled water several times to remove dust and other water-soluble impurities. The same process for preparation of the surfaces was reported frequently [36][37][38][39]. P(HEMA) and P(MMA-HEMA) were used as similar disk-shaped sheets of 1 g of weight.…”

Kinetic and thermodynamic studies for alizarin removal from liquid phase using poly-2-hydroxyethyl methacrylate (PHEMA)

“…Additionally, many of these dyes 45 lead to detrimental effects on the human body such as allergic dermati-46 tis, skin irritation, and cancer; in some cases it will lead to genetic muta-47 tion in biotic organisms [3][4][5]. 48 Several remediation techniques for the removal of organic impuri-49 ties from polluted water such as electrochemical oxidation [6][7][8][9][10][11][12][13][14][15][16][17][18], sorp-50 tion, chemical coagulation, solvent extraction, bioremediation, photo 51 catalytic degradation and adsorption were reported, with varying levels 52 of success achieved and each technique also characterized by its inher- 53 ent limitations. Among all the chemical and physical methods available 54 for noxious dye removal from polluted water, adsorption has been rec- 55 ognized as an attractive severance technique for the removal of dyes 56 from wastewater, because it is highly efficient, a Q7 relatively low-cost 57 technique and has a simple design [19].…”