Fabrication of porous polymeric structures using a simple sonication technique for tissue engineering
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Alan Saúl Álvarez-Suarez
Abstract
Porous polymeric scaffolds have been applied successfully in the biomedical field. This work explores the use of an ultrasonic probe to generate cavitation in a polymeric solution, thus producing pores in the polymeric scaffolds. Porous polymeric structures with average pore sizes ranging from 5 to 63 μm and porosity of 6–44% were fabricated by a process consisting of sonication, flash freezing, and lyophilization of poly(lactic-co-glycolic acid) (PLGA), gelatin (GEL), chitosan (CS) and poly(vinyl alcohol) (PVAL) solutions. Pore structure was characterized by scanning electron microscopy (SEM) and image analysis software. The infrared spectra were analyzed before and after the fabrication process to observe any change in the chemical structure of the polymers. A water absorption test indicated the susceptibility of the samples to retain water in their structure. TGA results showed that GEL experienced degradation at 225°C, CS had a decomposition peak at 280°C, the thermal decomposition of PLGA occurred at 375°C, and PVAL showed two degradation regions. The DSC analysis showed that the glass transition temperature (Tg) of GEL, CS, PLGA and PVAL occurred at 70°C, 80°C, 60°C and 70°C, respectively. The fabricated porous structures demonstrated similar physical characteristics to those found in bone and cartilage.
Acknowledgment
The authors are grateful for the support by “Programa para el Desarrollo de Personal Docente, Secretaria de EducaciónPublica” (PRODEP-SEP; project no. UABC-PTC-629).
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Articles in the same Issue
- Frontmatter
- Preparation and processing
- Cellulose modification and shaping – a review
- The effect of shear history on urea containing gliadin solutions
- Preparation and characterization of poly(ethylene 2,5-furandicarboxylate/nanocrystalline cellulose composites via solvent casting
- Material properties
- Mechanical properties of natural fibre polymer composites
- Structure and properties of poly(lactic acid)/poly(lactic acid)-α-cyclodextrin inclusion compound composites
- Fabrication of random and aligned-oriented cellulose acetate nanofibers containing betamethasone sodium phosphate: structural and cell biocompatibility evaluations
- Matrix impact on the mechanical, thermal and electrical properties of microfluidized nanofibrillated cellulose composites
- Engineering
- Bi-layered electrospun nanofibrous polyurethane-gelatin scaffold with targeted heparin release profiles for tissue engineering applications
- Fabrication of porous polymeric structures using a simple sonication technique for tissue engineering
