Mechanical and thermal properties of SiO2–PMMA monoliths

Avila-Herrera, C.A.; Gómez-Guzmán, O.; Sánchez, Jorge; Yáñez-Limón, J.M.; Muñoz-Saldaña, J.; Ramı́rez-Bon, R.

doi:10.1016/j.jnoncrysol.2006.02.125

Cited by 27 publications

(19 citation statements)

References 29 publications

(41 reference statements)

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“…The values of hardness calculated from the fitting to the work of indentation model [11] were 0.689 and 0.518 GPa for the SiO 2 -PMMA and SiO 2 -PMMAAl 2 O 3 hybrid coatings, respectively. Both values of hardness are several times higher than the hardness of acrylic substrate, which is 0.17 GPa and it was measured by the same method [12]. It can be seen that the hardness at the normalized penetration depth of 1, which should be the substrate hardness, is about 0.26 GPa.…”

Section: Resultsmentioning

confidence: 73%

Hardness and wearing properties of SiO₂–PMMA hybrid coatings reinforced with Al₂O₃ nanowhiskers

Alvarado-Rivera¹,

Muñoz-Saldaña

Castro-Beltrán

et al. 2007

Phys. Status Solidi (c)

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Some properties of SiO 2 -PMMA hybrid coatings can be tailored by controlling the weight content of each component. For instance, hardness of SiO 2 -PMMA hybrid coatings takes values between those of SiO 2 and PMMA, depending on the molar concentration ratio. Thus, these coatings are quite appropriated to be applied as antiscratch and abrasion resistant on polymeric materials such as acrylic. In this work we have evaluated the hardness and wearing properties of SiO 2 -PMMA-Al 2 O 3 hybrid coatings deposited on acrylic substrates. The hybrid coatings were deposited by the sol-gel method from a precursor solution with a molar ratio 1:0.25:0.25 for tetraethil-orthosilicate (TEOS), methylmethacrylate (MMA) and 3-trimetoxi-silil-propil-methacrylate (TMSPM) as the coupling agent, respectively. Another set of hybrid coatings with additional 0.1 wt.% of Al 2 O 3 nanowhiskers in an identical precursor solution were also deposited on acrylic substrates. Hardness, creep and wearing properties of both types of hybrid coatings were evaluated by nanoindentation and nanoscratching. Complementary atomic force microscopy and optical transmission spectroscopy measurements were done in all the hybrid films studied.

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Section: Resultsmentioning

confidence: 73%

Hardness and wearing properties of SiO₂–PMMA hybrid coatings reinforced with Al₂O₃ nanowhiskers

Alvarado-Rivera¹,

Muñoz-Saldaña

Castro-Beltrán

et al. 2007

Phys. Status Solidi (c)

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“…Fig. 2 shows 29 Si NMR spectra for SiO 2 -PMMA hybrids subjected to different TT temperatures and three main peaks can be seen centered at À 50, À59 and À 67 ppm assigned to T 1 (-CH 2 Si(O-Si)(OR) 2 , R¼H or CH 3 ), T 2 (-CH 2 Si(O-Si)(OR)) and T 3 (-CH 2 Si(O-Si) 3 ) units, respectively [30]. The populations of the silicon species (T n ) are presented in Table 1.…”

Section: Structural Characterizationmentioning

confidence: 99%

“…Siloxane-poly(methyl methacrylate) or SiO 2 -PMMA hybrid nanocomposites have been widely studied due to their thermal and mechanical properties [1][2][3][4], optical transparency [5], flameretardancy [6] and their applications in membranes for liquid separation [7], colored thin films prepared by organic dyes incorporation [8], coatings with low friction coefficients, good antiwear properties [9] and corrosion protection [10,11].…”

Section: Introductionmentioning

confidence: 99%

Effects of thermal treatment on the structure and luminescent properties of Eu 3+ doped SiO 2 –PMMA hybrid nanocomposites prepared by a sol–gel process

Jesus

Santos

Caiut

et al. 2016

Journal of Luminescence

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“…benzoyl peroxide) for in situ polymerization post-injection. [16][17][18][19][20][21][22][23][24] Previously, we have demonstrated that the nano-scale molecular interactions occur at an optimum ratios of (a) 1 : 10 (mol /mol) 3-(trimethoxysilyl)propyl methacrylate (MPMA) to MMA (MPMA : MMA) and (b) 60 : 40 (v/ v) polymer to bioactive glass solutions. In addition, the poor biocompatibility of PMMA may result in a thickened intervening brous tissue layer and/or bone resorption, which in turn can lead to implant loosening and premature implant failure.…”

Section: Introductionmentioning

confidence: 99%

Bioactive poly(methyl methacrylate) for bone fixation

et al. 2015

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Poly(methyl methacrylate) (PMMA) is broadly used for bone fixation. One of the major concerns of using this polymer is the lack of post-implantation integration with the host tissue. We have produced a novel hybrid ceramic-thermoplastic composite manufactured by a sol-gel method via covalent bonding between bioactive glass and PMMA to address this shortcoming. The uniform distribution of bioactive glass promoted the bioactivity of PMMA and substantially improved the biological properties. In this paper, we describe a refinement of the synthesis process of a previously manufactured PMMA-bioactive glass hybrid resulting in significantly more rapid fabrication. Key innovations were the replacement of tetrahydrofuran with ethanol as a more biologically benign reaction solvent, and the addition of sodium bicarbonate as a non-toxic catalyst. Our results showed that the gelation time was decreased 100-fold by increasing the reaction temperature from 25 C to 70 C, which also increased the rate of hardening 7-fold. The resulting hybrid monoliths displayed a more condensed structure with an 80% increase in network connectivity and 6-fold more resistance to degradation. These favorable biophysical properties of the new class of hybrids also enhanced the osteoblast adhesion and proliferation compared with the previously developed hybrids. This bioactive glass-PMMA hybrid has great potential to be used as a bone filler.

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Mechanical and thermal properties of SiO2–PMMA monoliths

Cited by 27 publications

References 29 publications

Hardness and wearing properties of SiO₂–PMMA hybrid coatings reinforced with Al₂O₃ nanowhiskers

Hardness and wearing properties of SiO₂–PMMA hybrid coatings reinforced with Al₂O₃ nanowhiskers

Effects of thermal treatment on the structure and luminescent properties of Eu 3+ doped SiO 2 –PMMA hybrid nanocomposites prepared by a sol–gel process

Bioactive poly(methyl methacrylate) for bone fixation

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Mechanical and thermal properties of SiO2–PMMA monoliths

Cited by 27 publications

References 29 publications

Hardness and wearing properties of SiO2–PMMA hybrid coatings reinforced with Al2O3 nanowhiskers

Hardness and wearing properties of SiO2–PMMA hybrid coatings reinforced with Al2O3 nanowhiskers

Effects of thermal treatment on the structure and luminescent properties of Eu 3+ doped SiO 2 –PMMA hybrid nanocomposites prepared by a sol–gel process

Bioactive poly(methyl methacrylate) for bone fixation

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Product

Resources

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Hardness and wearing properties of SiO₂–PMMA hybrid coatings reinforced with Al₂O₃ nanowhiskers

Hardness and wearing properties of SiO₂–PMMA hybrid coatings reinforced with Al₂O₃ nanowhiskers