Project Details
Description
Los poliuretanos (PUs) están generando un creciente interés en el campo biomédico debido a propiedades características, entre las que se pueden mencionar propiedades elásticas, biodegradabilidad y biocompatibilidad in vitro e in vivo. A partir de PUs sintetizados con polioles derivados del aceite de higuerilla y diferentes diisocianatos (diisocianato de isoforona (IPDI), diisocianato de hexametileno (HDI) y 4,4'-metilenbis (isocianato de ciclohexilo) (HDMI)), se generarán suturas biomédicas que serán caracterizadas en cuanto a su estructura química por medio de espectroscopia de infrarrojos (FTIR), resistencia al ataque químico (ASTM D543-67), determinación del ángulo de contacto, absorción de agua, propiedades mecánicas como tensión-deformación (D2256/D2256M–10), análisis termogravimétrico (TGA) y análisis térmico dinamo-mecánico (DMTA), junto con caracterización morfológica por medio de microscopia electrónica de barrido (SEM). Estas propiedades se correlacionarán con la actividad antioxidante determinada por medio de DPPH (2,2-Diphenyl-1-picrylhydrazyl) y ABTS (2,2-azinobis-(3 etilbenzotiazolin-6-sulfónico), la biodegradabilidad in vitro evaluada por medio de fluido fisiológico simulado (SBF), buffer fosfato salino (PBS), y citotoxicidad in vitro (ISO 10993-5), citotoxicidad de subproductos de degradación, actividad antimicrobiana y adsorción de proteínas, todo esto en función del tipo de poliol y diisocianato utilizado en la síntesis del PU. Adicional a esto se determinará la biocompatibilidad in vivo de la(s) sutura(s) no absorbibles con base en la relación estructura/propiedades y se realizará una comparación con materiales homólogos comercialmente disponibles como el polipropileno y la polidioxanona. En ese sentido, los resultados del trabajo podrán conducir al diseño de biomateriales con mayores prestaciones y un conocimiento más profundo de las relaciones entre la estructura y las propiedades de los mismos.
Layman's description
Polyurethanes (PUs) are generating an increasing interest in the biomedical field due to characteristic properties, among which elastic properties, biodegradability and biocompatibility can be mentioned in vitro and in vivo. From PUs synthesized with polyols derived from castor oil and different diisocyanates (isophorone diisocyanate (IPDI), hexamethylene diisocyanate (HDI) and 4,4'-methylenebis (cyclohexyl isocyanate) (HDMI)), biomedical sutures will be generated which will be characterized in terms of their chemical structure by means of infrared spectroscopy (FTIR), resistance to chemical attack (ASTM D543-67), determination of the contact angle, water absorption, mechanical properties such as stress-strain (D2256 / D2256M -10), thermogravimetric analysis (TGA) and dynamo-mechanical thermal analysis (DMTA), together with morphological characterization by means of scanning electron microscopy (SEM). These properties will correlate with the antioxidant activity determined by means of DPPH (2,2-Diphenyl-1-picrylhydrazyl) and ABTS (2,2-azinobis- (3-ethylbenzthiazolin-6-sulfonic), the in vitro biodegradability evaluated by means of simulated physiological fluid (SBF), phosphate buffered saline (PBS), and in vitro cytotoxicity (ISO 10993-5), degradation by-product cytotoxicity, antimicrobial activity and protein adsorption, all this depending on the type of polyol and diisocyanate used in the synthesis of PU.In addition to this, the in vivo biocompatibility of the nonabsorbable suture (s) will be determined based on the structure / properties relationship and a comparison will be made with commercially available homologous materials such as polypropylene and polydioxanone. In this sense, the results of the work may lead to the design of biomaterials with greater benefits and a deeper knowledge of the relationships between the structure and the properties thereof.
Key findings
poliuretanos; suturas; aceite de higuerilla
| Status | Finished |
|---|---|
| Effective start/end date | 18/04/18 → 18/11/21 |
Collaborative partners
- Universidad de La Sabana (lead)
- Ministerio de Ciencia,Tecnología e Innovación (MINCIENCIAS) (CoFunder)
Project Status
- Succesfully closed
Relation Academy- enterprises
- No
Training for research
- Yes
Interdisciplinary
- Yes
Collaborative project between research groups
- Yes
Project with potential for technological development susceptible to intellectual property protection.
- Yes
Degree work - Master's or Ph
- None
Area of knowledge (OECD)
- ENGINEERING
Rol Sabana
- Executor
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Why Polyurethanes Have Been Used in the Manufacture and Design of Cardiovascular Devices: A Systematic Review
Valero Valdivieso, M. F. (Correspondent Author) & Navas Gomez, K. J. (Researcher), 22 Jul 2020, In: Materials (open access). p. 3250-3267 17 p.Research output: Contribution to journal › Review article › peer-review
35 Scopus citations -
Candidate Polyurethanes Based on Castor Oil (Ricinus communis), with Polycaprolactone Diol and Chitosan Additions, for Use in Biomedical Applications
Uscategui Maldonado, Y. L. (PHD Student), Valero Valdivieso, M. F. (Correspondent Author), Diaz Barrera, L. E. (Second Author), Vallés Lluch, A. (Fourth Autor), Serrano, M. A. (Another Number Author), Vilariño Feltrer, G. (Another Number Author) & Gómez Tejedor, J. A. (Third Author), 10 Jan 2019, In: Molecules. p. 237-267 30 p.Research output: Contribution to journal › Article › peer-review
40 Scopus citations -
In vitro and in vivo biocompatibility of polyurethanes synthesized with castor oil polyols for biomedical devices
Uscategui Maldonado, Y. L. (PHD Student), Valero Valdivieso, M. F. (Correspondent Author) & Diaz Barrera, L. E. (Second Author), 31 Jan 2019, In: Journal of Materials Research. p. 519-531 12 p.Research output: Contribution to journal › Article › peer-review
32 Scopus citations