| Autor: |
Tăut MA; Physics and Chemistry Department, Technical University of Cluj-Napoca, 103-105 Bulevardul Muncii Street, 400641 Cluj-Napoca, Romania., Moldovan M; Raluca Ripan Institute for Research in Chemistry, Babeș-Bolyai University, 30 Fantanele Street, 400294 Cluj-Napoca, Romania., Filip M; Raluca Ripan Institute for Research in Chemistry, Babeș-Bolyai University, 30 Fantanele Street, 400294 Cluj-Napoca, Romania., Petean I; Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, 11 Arany Janos Street, 400028 Cluj-Napoca, Romania., Saroşi C; Raluca Ripan Institute for Research in Chemistry, Babeș-Bolyai University, 30 Fantanele Street, 400294 Cluj-Napoca, Romania., Cuc S; Raluca Ripan Institute for Research in Chemistry, Babeș-Bolyai University, 30 Fantanele Street, 400294 Cluj-Napoca, Romania., Taut AC; Applied Electronics Department, Technical University of Cluj-Napoca, 26-28 George Barițiu Street, 400027 Cluj-Napoca, Romania., Ardelean I; Physics and Chemistry Department, Technical University of Cluj-Napoca, 103-105 Bulevardul Muncii Street, 400641 Cluj-Napoca, Romania., Lazăr V; Department of General Medicine, Vasile Goldis University of Medicine, 310048 Arad, Romania.; Pediatric Clinic II, Clinical Hospital Emergency of Arad County, 310037 Arad, Romania., Man SC; Department of Pediatrics, 'Iuliu Hațieganu' University of Medicine and Pharmacy Cluj-Napoca, 400124 Cluj-Napoca, Romania. |
| Abstrakt: |
This article proposes the synthesis and characterization of (triethylene glycol dimethacrylate-N,N-dihydroxyethyl-p-toluidine) TEGDMA-DHEPT self-healing microcapsules for their inclusion in dental composite formulations. The obtaining method is the in situ emulsion polymerization of the (poly urea-formaldehyde) (PUF) coatings. The microcapsules were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), atomic force microscopy (AFM), high-performance liquid chromatography (HPLC), and low-field nuclear magnetic resonance (NMR) techniques. The optimal formation of uniform microcapsules is achieved at a stirring speed of 800 rpm and centrifugation is no longer necessary. HPLC demonstrates that the microcapsules formed at 800 rpm show a better control of liquid release than the heterogeneous ones obtained at a lower stirring speed. The centrifuged samples have rounded shapes, with dimensions between 80 and 800 nm, while the non-centrifuged samples are more uniform, with a spherical shape and dimensions of approximately 800 nm. |
