Synthesis and characterisation of macroporous poly(methyl methacrylate) with plasma-polymerised hydrophilic coating

Serrano‐Aroca, Ãngel

doi:10.4995/thesis/10251/1857

Cited by 1 publication

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References 86 publications

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“…FTIR spectra of scaffolds for pure PHEA and nanocomposites (15 and 30 wt %) are represented in Figure 4. Spectrum of porous PHEA shows the characteristic peaks corresponding to bulk PHEA: OH stretching around 3400 cm −1 , the CHx asymmetric and symmetric stretching peaks at 2962 and 2888 cm −1 , respectively, and the CO stretching peak at 1724 cm −1 20. On the other hand, characteristic peaks of the silica phase appear when silica content increases: SiOSi stretching at 1085, 1024, and 800 cm −1 21, 22…”

Section: Resultsmentioning

confidence: 99%

Three‐dimensional nanocomposite scaffolds with ordered cylindrical orthogonal pores

et al. 2007

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A silica reinforcement can improve the mechanical properties of hydrogels in the rubbery state. A method to prepare a scaffold with a well-ordered array of cylindrical pores is presented in this work, which yields a scaffold with a biphasic matrix of a hybrid nanocomposite: the hydrogel poly(2-hydroxyethyl acrylate) (PHEA) and a silica network obtained by an acid catalyzed sol-gel process of tetraethoxysilane (TEOS). As porogenic template of the scaffold stacked layers of commercial polyamide 6 fabrics were used, which were compressed and sintered. Porosity and dynamic mechanical response of the resulting scaffolds were measured and compared with the bulk properties. Removal of the organic polymer phase of the scaffold by pyrolysis revealed the overall continuity of the silica network; the residue maintained the original cylindrical pore structure of the scaffolds, though slightly shrunk. Atomic force microscopy topography measurements of these pyrolysed residues revealed a silica structure with particle aggregates having sizes around tens of nanometers. The silica distribution was assessed by X-ray microanalysis mapping, showing homogeneity at a micrometer scale.

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Section: Resultsmentioning

confidence: 99%