The monomers triethylene glycol dimethacrylate (TEGDMA), 95%, and 2,2-Bis[p-(2′-hydroxy-3′-methacryloxypropoxy)phenylene]propane (Bis-GMA) were both provided by Aldrich, Taufkirchen, Germany. Co-initiator 2-(Dimethylamino)ethylmethacrylate (DMAEMA), 99%, and initiator camphorquinone, 98%, were purchased from J&K Scientific GmbH, (Lommel, Belgium). Commercially available OMMT, Nanomer® I.34MN, produced by Nanocor Company (Hoffman Estates, IL, USA) and supplied by Aldrich (Taufkirchen, Germany), is an –onium ion modified clay containing 25 to 30 wt % methyl dixydroxyethyl hydrogenated tallow ammonium ion. OMMTs with different intercalating organomodifiers, such as cetyltrimethylammonium chloride (MMT-CTAC), dimethylaminooctadecyl methacrylate (MMT-DMAODM), dimethylaminohexadecyl methacrylate (MMT-DMAHDM), as well as two surface modified analogs, with 3-(trimethoxysilyl)propyl methacrylate, S.MMT-CTAC, and S.MMT-DMAHDM were all prepared in our previous works [49 (link),50 (link)]. The specific chemical structures of all MMT organomofidiers are represented in Figure 1 . All other chemicals used were of reagent grade.
Camphorquinone
Manufactured by J&K Scientific
Sourced in Belgium
Camphorquinone is a chemical compound used as a photoinitiator in dental restorative materials, such as dental composites and adhesives. It is an organic compound derived from the essential oil of the camphor tree. Camphorquinone absorbs visible light, typically in the blue-violet range, and undergoes photochemical reactions that initiate the polymerization process in these dental materials.
Automatically generated - may contain errors
3 protocols using camphorquinone
1
Modified Clay Nanocomposites Synthesis
2
Synthesis and characterization of modified clay fillers
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The monomers triethylene glycol dimethacrylate (TEGDMA), 95%, and 2,2-Bis[p-(2′-hydroxy-3′-methacryloxypropoxy)phenylene]propane (Bis-GMA) were both provided by SIGMA-ALDRICH CHEMIE GmbH (Steinheim, Germany). The co-initiator 2-(dimethylamino)ethylmethacrylate (DMAEMA), 99%, and initiator camphorquinone, 98%, were purchased from J&K Scientific GmbH (Pforzheim, Germany). Organically modified silica nanopowder (S.MPS) with 3-(trimethoxysilyl)propyl methacrylate (γ-MPS) was synthesized and subsequently characterized in our previous work [29 (link)]. The commercially available organomodified montmorillonite Nanomer® I.34MN, i.e., an –onium ion modified clay containing 25 to 30 wt% methyl dixydroxyethyl hydrogenated tallow ammonium ion (QA-clay), was produced by Nanocor Company (Hoffman Estates, IL, USA) and supplied by Aldrich (Taufkirchen, Germany). Two experimental QA-clays, namely, a clay type intercalated with cetyltrimethylammonium chloride (MMT-CTAC), as well as its surface-modified analog with 3-(trimethoxysilyl)propyl methacrylate (S.MMT-CTAC), were both prepared and characterized in our previous works [22 (link),30 (link)]. The particular structures of the above QA-clays are presented in Scheme 1 . All other chemicals used were of reagent grade.
3
Synthesis and Characterization of Dental Composites
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The monomers triethyleneglycol dimethacrylate (TEGDMA), 95%, and 2,2-bis[4-(2-hydroxy-3methacrylyloxy-propoxy)-phenyl] propane (Bis-GMA) were both provided by Aldrich (Sigma-Aldrich Chemie, Taufkirchen, Germany). Co-initiator 2-(Dimethylamino) ethylmethacrylate (DMAEMA), 99%, and initiator camphorquinone, 98%, were purchased from J&K (J&K Scientific, Lommel, Belgium). Commercially available OMMTS with the trade name Nanomer ® I.34MN (Nanocor, Hoffman Estates, IL, USA) and Cloisite ® 20A were supplied by Aldrich (Sigma-Aldrich Chemie) and BYK Additives & Instruments (BYK-Chemie, Wesel, Germany) respectively. They are -onium ion modified clays containing methyl dihydroxyethyl hydrogenated tallow and dimethyl dehydrogenated tallow quaternary ammonium ions respectively. Another OMMT with dimethylaminooctadecyl methacrylate as intercalating organomodifier (MMT-DMAODM) prepared in our previous work was also used 32) . The specific chemical structures of all MMT organomofidiers are represented in Table 1. Phosphate buffered saline (PBS) 10× was provided by Aldrich (Sigma-Aldrich Chemie) and diluted to a 1× working solution. All other chemicals used were of reagent grade.
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