Synthesis and study of new functionalized silica aerogel poly(methyl methacrylate) composites for biomedical use

István Lázár, Helga Fruzsina Bereczki, Sándor Mano, L. Daróczi, G. Deák, I. Fábián, Zoltán Csernátony

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

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 radical bulk polymerization of neat methyl methacrylate in the presence of natural and functionalized silica aerogels 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 orthopedic 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 Gardner'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.

Original languageEnglish
Pages (from-to)348-358
Number of pages11
JournalPolymer Composites
Volume36
Issue number2
DOIs
Publication statusPublished - 2015

Fingerprint

Aerogels
Polymethyl Methacrylate
Polymethyl methacrylates
Silicon Dioxide
Silica
Composite materials
Bone cement
Bone Cements
Compressive strength
Fillers
Polymers
Methacrylates
Body fluids
Orthopedics
Gel permeation chromatography
Impact strength
Molecular weight distribution
Aniline
Free radicals
Specific surface area

ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry
  • Ceramics and Composites
  • Chemistry(all)

Cite this

Synthesis and study of new functionalized silica aerogel poly(methyl methacrylate) composites for biomedical use. / Lázár, István; Bereczki, Helga Fruzsina; Mano, Sándor; Daróczi, L.; Deák, G.; Fábián, I.; Csernátony, Zoltán.

In: Polymer Composites, Vol. 36, No. 2, 2015, p. 348-358.

Research output: Contribution to journalArticle

Lázár, István ; Bereczki, Helga Fruzsina ; Mano, Sándor ; Daróczi, L. ; Deák, G. ; Fábián, I. ; Csernátony, Zoltán. / Synthesis and study of new functionalized silica aerogel poly(methyl methacrylate) composites for biomedical use. In: Polymer Composites. 2015 ; Vol. 36, No. 2. pp. 348-358.
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