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001-es BibID:	BIBFORM052653
Első szerző:	Lázár István (vegyész)
Cím:	Synthesis and study of new functionalized silica aerogel poly(methyl methacrylate) composites for biomedical use / István Lázár, Helga Fruzsina Bereczki, Sándor Manó, Lajos Daróczi, György Deák, István Fábián, Zoltán Csernátony
Dátum:	2015
ISSN:	0272-8397
Megjegyzések:	Monolithic silica aerogels are nanostructured solids characterized with exceptionally high porosity and specific surface area. Although their strength can be improved by surface treatment with polymers, none of them has been tested yet as a filler in biocompatible polymer composites. The new aerogel-poly(methyl methacrylate) composites were prepared by free radi- cal bulk polymerization of neat methyl methacrylate in the presence of natural and functionalized silica aero- gels at 60 C, using cumene hydroperoxide initiator and 4, N , N -trimethyl-aniline redox pair. Synthetic conditions were set to be most similar to the setting of orthope- dic bone cements. Structures, compositions, and molecular weight distributions were determined by scanning electron microscopy, combustion analysis, and gel permeation chromatography, respectively. Compressive strength, Shore D hardness and Gard- ner's impact strength were measured, and the fracture properties were compared to the matrices. All four aerogel fillers resulted in significant enhancement in compressive strength, reaching a maximum value of 123 MPa. Dissolution of H103PC-1 natural and H106PB-1 C16 modified aerogel containing specimens in simulated body fluid occurred in 20 days, leaving porous surfaces behind, which may give rise to higher tissue adhesion potential in bone cements. Heat treated silica aerogel in H112PA-1 showed no leaching out, and its composites might be usefull in high-load technical applications.
Tárgyszavak:	Természettudományok Kémiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban Doktori iskola
Megjelenés:	Polymer Composites 36 : 2 (2015), p. 348-358. -
További szerzők:	Bereczki Helga Fruzsina (1986-) (vegyész) Manó Sándor (1977-) (gépészmérnök, számítógépes tervezőmérnök) Daróczi Lajos (1965-) (fizikus) Deák György (1954-) (polimer kémikus) Fábián István (1956-) (vegyész) Csernátony Zoltán (1959-2023) (ortopéd sebész, traumatológus)
Pályázati támogatás:	TÁMOP-4.2.2/B-10/1-2010-0024 TÁMOP Kémiai Tudományok Doktori Iskola TÁMOP-4.2.2.A-11/1/KONV-2012-0036 TÁMOP 76834 OTKA
Internet cím:	DOI Intézményi repozitóriumban (DEA) tárolt változat
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