Dispersion of Functionalized Silica Micro- and Nanoparticles into Poly(nonamethylene Azelate) by Ultrasonic Micro-Molding
Ultrasound micro-molding technology has proved useful in processing biodegradable polymers with minimum material loss. This makes this technology particularly suitable for the production of biomedical microdevices. The use of silica (SiO2) nanoparticles is also interesting because of advantages...
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MDPI AG
2015-11-01
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| Series: | Applied Sciences |
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| Online Access: | http://www.mdpi.com/2076-3417/5/4/1252 |
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| author | Angélica Díaz María T. Casas Jordi Puiggalí |
| author_facet | Angélica Díaz María T. Casas Jordi Puiggalí |
| author_sort | Angélica Díaz |
| collection | DOAJ |
| description | Ultrasound micro-molding technology has proved useful in processing biodegradable polymers with minimum material loss. This makes this technology particularly suitable for the production of biomedical microdevices. The use of silica (SiO2) nanoparticles is also interesting because of advantages like low cost and enhancement of final properties. Evaluation of the capacity to create a homogeneous dispersion of particles is crucial. Specifically, this feature was explored taking into account micro- and nano-sized silica particles and a biodegradable polyester derived from 1,9-nonanodiol and azelaic acid as a matrix. Results demonstrated that composites could be obtained with up to 6 wt. % of silica and that no degradation occurred even if particles were functionalized with a compatibilizer like (3-aminopropyl) triethoxysilane. Incorporation of nanoparticles should have a great influence on properties. Specifically, the effect on crystallization was evaluated by calorimetric and optical microscopy analyses. The overall crystallization rate was enhanced upon addition of functionalized silica nanospheres, even at the low percentage of 3 wt. %. This increase was mainly due to the ability of nanoparticles to act as heterogeneous nuclei during crystallization. However, the enhancement of the secondary nucleation process also played a significant role, as demonstrated by Lauritzen and Hoffmann analysis. |
| first_indexed | 2024-12-17T15:02:37Z |
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| id | doaj.art-7645d8af548c4c03a9a0bd19ab990ac4 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-12-17T15:02:37Z |
| publishDate | 2015-11-01 |
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| series | Applied Sciences |
| spelling | doaj.art-7645d8af548c4c03a9a0bd19ab990ac42022-12-21T21:43:52ZengMDPI AGApplied Sciences2076-34172015-11-01541252127110.3390/app5041252app5041252Dispersion of Functionalized Silica Micro- and Nanoparticles into Poly(nonamethylene Azelate) by Ultrasonic Micro-MoldingAngélica Díaz0María T. Casas1Jordi Puiggalí2Chemical Engineering Department, Polytechnic University of Catalonia, Av. Diagonal 647, Barcelona E-08028, SpainChemical Engineering Department, Polytechnic University of Catalonia, Av. Diagonal 647, Barcelona E-08028, SpainChemical Engineering Department, Polytechnic University of Catalonia, Av. Diagonal 647, Barcelona E-08028, SpainUltrasound micro-molding technology has proved useful in processing biodegradable polymers with minimum material loss. This makes this technology particularly suitable for the production of biomedical microdevices. The use of silica (SiO2) nanoparticles is also interesting because of advantages like low cost and enhancement of final properties. Evaluation of the capacity to create a homogeneous dispersion of particles is crucial. Specifically, this feature was explored taking into account micro- and nano-sized silica particles and a biodegradable polyester derived from 1,9-nonanodiol and azelaic acid as a matrix. Results demonstrated that composites could be obtained with up to 6 wt. % of silica and that no degradation occurred even if particles were functionalized with a compatibilizer like (3-aminopropyl) triethoxysilane. Incorporation of nanoparticles should have a great influence on properties. Specifically, the effect on crystallization was evaluated by calorimetric and optical microscopy analyses. The overall crystallization rate was enhanced upon addition of functionalized silica nanospheres, even at the low percentage of 3 wt. %. This increase was mainly due to the ability of nanoparticles to act as heterogeneous nuclei during crystallization. However, the enhancement of the secondary nucleation process also played a significant role, as demonstrated by Lauritzen and Hoffmann analysis.http://www.mdpi.com/2076-3417/5/4/1252ultrasound micro-molding technologyfunctionalized silica nanoparticlesnanocompositespoly(alkylene dicarboxylate)crystallization kinetics |
| spellingShingle | Angélica Díaz María T. Casas Jordi Puiggalí Dispersion of Functionalized Silica Micro- and Nanoparticles into Poly(nonamethylene Azelate) by Ultrasonic Micro-Molding Applied Sciences ultrasound micro-molding technology functionalized silica nanoparticles nanocomposites poly(alkylene dicarboxylate) crystallization kinetics |
| title | Dispersion of Functionalized Silica Micro- and Nanoparticles into Poly(nonamethylene Azelate) by Ultrasonic Micro-Molding |
| title_full | Dispersion of Functionalized Silica Micro- and Nanoparticles into Poly(nonamethylene Azelate) by Ultrasonic Micro-Molding |
| title_fullStr | Dispersion of Functionalized Silica Micro- and Nanoparticles into Poly(nonamethylene Azelate) by Ultrasonic Micro-Molding |
| title_full_unstemmed | Dispersion of Functionalized Silica Micro- and Nanoparticles into Poly(nonamethylene Azelate) by Ultrasonic Micro-Molding |
| title_short | Dispersion of Functionalized Silica Micro- and Nanoparticles into Poly(nonamethylene Azelate) by Ultrasonic Micro-Molding |
| title_sort | dispersion of functionalized silica micro and nanoparticles into poly nonamethylene azelate by ultrasonic micro molding |
| topic | ultrasound micro-molding technology functionalized silica nanoparticles nanocomposites poly(alkylene dicarboxylate) crystallization kinetics |
| url | http://www.mdpi.com/2076-3417/5/4/1252 |
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