In Situ Synthesis of Oil-Based Polymer/Silver Nanocomposites by Photoinduced Electron Transfer and Free Radical Polymerization Processes

Abstract

In this study, in situ synthesis of oil-based polymer-silver nanocomposites was achieved by using photoinduced free radical polymerization processes in which silver nanoparticles were formed by electron transfer reaction. An oil-based macromonomer was prepared and then copolymerized with styrene in the presence of AgNO 3 . Copolymerization was started with free radicals formed by photolysis of 2,2-dimethoxy-2-phenyl acetophenone and simultaneously silver nitrate was reduced to metallic silver in nanosize by electron transfer reaction. The amount of photoinitiator influenced the size of silver nanoparticles formed within the polymer films. Nanocomposite films were characterized by TEM and TGA analysis. The obtained polymer nanocomposite film was also examined in respect of surface coating material that would have an antibacterial effect against Gram-positive, Gram-negative and spore-forming bacteria. It was demonstrated that suitably coated nanocomposite samples exhibited an antibacterial effect against these bacteria.

Styrenated urethane oil synthesis via CuAAC “click” chemistry approach

“…Even though triglyceride oils cannot be directly used in coating applications, they can be successfully used after applying various modification methods in this field [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. One of the most popular modification techniques is the copolymerization of triglyceride oils with vinyl monomers, most extensively with styrene (St).…”

“…In the classical styrenation process, the formation of homopolystyrene leads to weak film properties. A number of studies were previously carried out in our laboratory with respect to avoidance of homopolymer formation in order to improve the film properties of oil-based binders [6][7][8][9][10][11][12][13][14]. In our previous studies, different strategies were employed to insert St segment into the oil structure.…”

“…In our previous studies, different strategies were employed to insert St segment into the oil structure. One of these strategies was the macromonomer technique and the other one was the use of macroinitiator having large oil portion as a soft segment [7][8][9][10][11][12]. Moreover, in addition to vinyl polymer segments, inorganic domains such as vinyl trimethoxysilane, 3-aminopropyltriethoxysilane and titanium isopropoxide were also inserted into the final polymer structure [13,14].…”

“…It should be emphasized that oil portion of the polymeric structure imparts the flexibility characteristic to the film to overcome the brittleness drawback. Moreover, the combination of oil segment with polystyrene and polyurethane polymers improves the film properties such as short drying time, good alkali, acid and, water resistances [6][7][8][9][10][11][12][13][14].…”

Polystyrene/clay nanocomposites by atom transfer radical nitroxide coupling chemistry

“…3 In the in situ polymerization technique, the monomer, together with the initiator and/or catalyst, is intercalated within the silicate layers and the polymerization is initiated by external stimulation such as thermal, photochemical, or chemical activation. [4][5][6][7][8][9][10][11][12][13][14][15][16] The chain growth in the clay galleries triggers the clay exfoliation and, hence, the nanocomposite formation. …”