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Mondragón-Herrera LI, Vargas-Coronado RF, Carrillo-Escalante H, Cauich-Rodríguez JV, Hernández-Sánchez F, Velasco-Santos C, Avilés F. Mechanical, Thermal, and Physicochemical Properties of Filaments of Poly (Lactic Acid), Polyhydroxyalkanoates and Their Blend for Additive Manufacturing. Polymers (Basel) 2024; 16:1062. [PMID: 38674981 PMCID: PMC11053644 DOI: 10.3390/polym16081062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Revised: 04/05/2024] [Accepted: 04/07/2024] [Indexed: 04/28/2024] Open
Abstract
Polymeric blends are employed in the production of filaments for additive manufacturing to balance mechanical and processability properties. The mechanical and thermal properties of polymeric filaments made of poly (lactic acid) (PLA), polyhydroxyalkanoates (PHA), and its blend (PLA-PHA) are investigated herein and correlated to their measured structural and physicochemical properties. PLA exhibits the highest stiffness and tensile strength, but lower toughness. The mechanical properties of the PLA-PHA blend were similar to those of PLA, but with a significantly higher toughness. Despite the lower mechanical properties of neat PHA, incorporating a small amount (12 wt.%) of PHA into PLA significantly enhances toughness (approximately 50%) compared to pure PLA. The synergistic effect is attributed to the spherulitic morphology of blended PHA in PLA, promoting interactions between the amorphous regions of both polymers. Thermal stability is notably improved in the PLA-PHA blend, as determined by thermogravimetric analysis. The blend also exhibits lower cold crystallization and glass transition temperatures as compared to PLA, which is beneficial for additive manufacturing. Following additive manufacturing, X-ray photoelectron spectroscopic showed that the three filaments present an increase in C-C and C=O bonds associated with the loss of C-O bonds. The thermal process induces a slight increase in crystallinity in PHA due to chain reorganization. The study provides insights into the thermal and structural changes occurring during the melting process of additive manufacturing.
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Affiliation(s)
- L. Itzkuautli Mondragón-Herrera
- Centro de Investigación Científica de Yucatán, A. C., Materials Department, Calle 43 No. 130 x 32 y 34, Col. Chuburná de Hidalgo, Mérida 97205, Yucatán, Mexico; (L.I.M.-H.); (R.F.V.-C.); (F.H.-S.)
| | - R. F. Vargas-Coronado
- Centro de Investigación Científica de Yucatán, A. C., Materials Department, Calle 43 No. 130 x 32 y 34, Col. Chuburná de Hidalgo, Mérida 97205, Yucatán, Mexico; (L.I.M.-H.); (R.F.V.-C.); (F.H.-S.)
| | - H. Carrillo-Escalante
- Centro de Investigación Científica de Yucatán, A. C., Materials Department, Calle 43 No. 130 x 32 y 34, Col. Chuburná de Hidalgo, Mérida 97205, Yucatán, Mexico; (L.I.M.-H.); (R.F.V.-C.); (F.H.-S.)
| | - J. V. Cauich-Rodríguez
- Centro de Investigación Científica de Yucatán, A. C., Materials Department, Calle 43 No. 130 x 32 y 34, Col. Chuburná de Hidalgo, Mérida 97205, Yucatán, Mexico; (L.I.M.-H.); (R.F.V.-C.); (F.H.-S.)
| | - F. Hernández-Sánchez
- Centro de Investigación Científica de Yucatán, A. C., Materials Department, Calle 43 No. 130 x 32 y 34, Col. Chuburná de Hidalgo, Mérida 97205, Yucatán, Mexico; (L.I.M.-H.); (R.F.V.-C.); (F.H.-S.)
| | - C. Velasco-Santos
- División de Estudios de Posgrado e Investigación, Tecnológico Nacional de México Campus Querétaro, Av. Tecnológico s/n, esq. Gral. Mariano Escobedo, Col. Centro Histórico, Santiago de Querétaro 76000, Querétaro, Mexico;
| | - F. Avilés
- Centro de Investigación Científica de Yucatán, A. C., Materials Department, Calle 43 No. 130 x 32 y 34, Col. Chuburná de Hidalgo, Mérida 97205, Yucatán, Mexico; (L.I.M.-H.); (R.F.V.-C.); (F.H.-S.)
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Belman-Flores CE, Herrera-Kao W, Vargas-Coronado RF, May-Pat A, Oliva AI, Rodríguez-Fuentes N, Vázquez-Torres H, Cauich-Rodríguez JV, Cervantes-Uc JM. Synthesis and characterization of pH sensitive hydrogel nanoparticles based on poly(N-isopropyl acrylamide-co-methacrylic acid). J Mater Sci Mater Med 2020; 31:61. [PMID: 32696259 DOI: 10.1007/s10856-020-06400-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Accepted: 07/08/2020] [Indexed: 06/11/2023]
Abstract
In this work, pH-sensitive hydrogel nanoparticles based on N-isopropyl acrylamide (NIPAM) and methacrylic acid (MAA) at various molar ratios, were synthesized and characterized in terms of physicochemical and biological properties. FTIR and 1HNMR spectra confirmed the successful synthesis of the copolymer that formed nanoparticles. AFM images and FE-SEM micrographs showed that nanoparticles were spherical, but their round-shape was slightly compromised with MAA content; besides, the size of particles tends to decrease as MAA content increased. The hydrogels nanoparticles also exhibited an interesting pH-sensitivity, displaying changes in its particle size when changes in pH media occurred. Biological characterization results indicate that all the synthesized particles are non-cytotoxic to endothelial cells and hemocompatible, although an increase of MAA content leads to a slight increase in the hemolysis percentage. Therefore, the pH-sensitivity hydrogels may serve as a versatile platform as self-regulated drug delivery systems in response to environmental pH changes.
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Affiliation(s)
- C E Belman-Flores
- Centro de Investigación Científica de Yucatán, A.C. Unidad de Materiales, Calle 43 No. 130 x32 y 34, Col. Chuburná de Hidalgo, Mérida, C.P. 97205, Yucatán, México
| | - W Herrera-Kao
- Centro de Investigación Científica de Yucatán, A.C. Unidad de Materiales, Calle 43 No. 130 x32 y 34, Col. Chuburná de Hidalgo, Mérida, C.P. 97205, Yucatán, México
| | - R F Vargas-Coronado
- Centro de Investigación Científica de Yucatán, A.C. Unidad de Materiales, Calle 43 No. 130 x32 y 34, Col. Chuburná de Hidalgo, Mérida, C.P. 97205, Yucatán, México
| | - A May-Pat
- Centro de Investigación Científica de Yucatán, A.C. Unidad de Materiales, Calle 43 No. 130 x32 y 34, Col. Chuburná de Hidalgo, Mérida, C.P. 97205, Yucatán, México
| | - A I Oliva
- Departamento de Física Aplicada, CINVESTAV-IPN, Unidad Mérida, Carretera Antigua a Progreso Km 6, Cordemex, Mérida, C.P. 97310, Yucatán, México
| | - N Rodríguez-Fuentes
- CONACYT-Centro de Investigación Científica de Yucatán, A.C. Unidad de Materiales, Calle 43 No. 130 x32 y 34, Col. Chuburná de Hidalgo, Mérida, C.P. 97205, Yucatán, México
| | - H Vázquez-Torres
- Departamento de Física, Área de Polímeros, Universidad Autónoma Metropolitana-Unidad Iztapalapa, San Rafael Atlixco No. 186, Col. Vicentina, Ciudad de México, C.P. 09340, México
| | - J V Cauich-Rodríguez
- Centro de Investigación Científica de Yucatán, A.C. Unidad de Materiales, Calle 43 No. 130 x32 y 34, Col. Chuburná de Hidalgo, Mérida, C.P. 97205, Yucatán, México
| | - J M Cervantes-Uc
- Centro de Investigación Científica de Yucatán, A.C. Unidad de Materiales, Calle 43 No. 130 x32 y 34, Col. Chuburná de Hidalgo, Mérida, C.P. 97205, Yucatán, México.
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Encalada-Alayola JJ, Veranes-Pantoja Y, Uribe-Calderón JA, Cauich-Rodríguez JV, Cervantes-Uc JM. Effect of Type and Concentration of Nanoclay on the Mechanical and Physicochemical Properties of Bis-GMA/TTEGDMA Dental Resins. Polymers (Basel) 2020; 12:E601. [PMID: 32155803 PMCID: PMC7182935 DOI: 10.3390/polym12030601] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 02/27/2020] [Accepted: 03/03/2020] [Indexed: 11/22/2022] Open
Abstract
Bis-GMA/TTEGDMA-based resin composites were prepared with two different types of nanoclays: an organically modified laminar clay (Cloisite® 30B, montmorillonite, MMT) and a microfibrous clay (palygorskite, PLG). Their physicochemical and mechanical properties were then determined. Both MMT and PLG nanoclays were added into monomer mixture (1:1 ratio) at different loading levels (0, 2, 4, 6, 8 and 10 wt.%), and the resulting composites were characterized by scanning electron microscopy (SEM), thermogravimetric analysis (TGA), dynamic mechanical analysis (DMA) and mechanical testing (bending and compressive properties). Thermal properties, depth of cure and water absorption were not greatly affected by the type of nanoclay, while the mechanical properties of dental resin composites depended on both the variety and concentration of nanoclay. In this regard, composites containing MMT displayed higher mechanical strength (both flexural and compression) than those resins prepared with PLG due to a poor nanoclay dispersion as revealed by SEM. Solubility of the composites was dependent not only on nanoclay-type but also the mineral concentration. Dental composites fulfilled the minimum depth cure and solubility criteria set by the ISO 4049 standard. In contrast, the minimum bending strength (50 MPa) established by the international standard was only satisfied by the dental resins containing MMT. Based on these results, composites containing either MMT or PLG (at low filler contents) are potentially suitable for use in dental restorative resins, although those prepared with MMT displayed better results.
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Affiliation(s)
- J. J. Encalada-Alayola
- Centro de Investigación Científica de Yucatán, A.C. Unidad de Materiales, Calle 43 No. 130 x 32 y 34, Col. Chuburná de Hidalgo C.P. Mérida 97205, Mexico; (J.J.E.-A.); (J.A.U.-C.); (J.V.C.-R.)
| | - Y. Veranes-Pantoja
- Centro de Biomateriales, Universidad de La Habana, Avenida Universidad, s/n, e/G y Ronda, C.P. La Habana 10600, Cuba;
| | - J. A. Uribe-Calderón
- Centro de Investigación Científica de Yucatán, A.C. Unidad de Materiales, Calle 43 No. 130 x 32 y 34, Col. Chuburná de Hidalgo C.P. Mérida 97205, Mexico; (J.J.E.-A.); (J.A.U.-C.); (J.V.C.-R.)
| | - J. V. Cauich-Rodríguez
- Centro de Investigación Científica de Yucatán, A.C. Unidad de Materiales, Calle 43 No. 130 x 32 y 34, Col. Chuburná de Hidalgo C.P. Mérida 97205, Mexico; (J.J.E.-A.); (J.A.U.-C.); (J.V.C.-R.)
| | - J. M. Cervantes-Uc
- Centro de Investigación Científica de Yucatán, A.C. Unidad de Materiales, Calle 43 No. 130 x 32 y 34, Col. Chuburná de Hidalgo C.P. Mérida 97205, Mexico; (J.J.E.-A.); (J.A.U.-C.); (J.V.C.-R.)
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Castillo-Cruz O, Avilés F, Vargas-Coronado R, Cauich-Rodríguez JV, Chan-Chan LH, Sessini V, Peponi L. Mechanical properties of l-lysine based segmented polyurethane vascular grafts and their shape memory potential. Mater Sci Eng C Mater Biol Appl 2019; 102:887-895. [PMID: 31147060 DOI: 10.1016/j.msec.2019.04.073] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 04/06/2019] [Accepted: 04/23/2019] [Indexed: 12/31/2022]
Abstract
Segmented polyurethanes based on polycaprolactone, 4,4 (metylene-bis-cyclohexyl) isocyanate, and l-lysine were synthesized, manufactured as small vascular grafts and characterized according to ISO 7198 standard for cardiovascular implants-tubular vascular prosthesis. In terms of mechanical properties, the newly synthesized polyurethane films exhibited lower secant modulus than Tecoflex™ SG 80A, a well-known medical grade polyurethane. Similarly, when tested as grafts, the l-lysine-based polyurethane exhibited lower longitudinal failure load (11.5 N vs. 116 N), lower circumferential failure load per unit length (5.67 N/mm vs. 14.0 N/mm) and lower suture forces for both nylon (13.3 N vs. 24.0 N) and silk (14.0 N vs. 19.3 N) when compared to Tecoflex™ SG 80A grafts. l-Lysine-based graft exhibited a burst strength of 3620 mmHg (482.6 kPa) and a compliance of 0.16%/mmHg. The cell adhesion was demonstrated with NIH/3T3 fibroblasts where cell adhesion was observed on both films and grafts, while cell alignment was observed only on the grafts. The mechanical properties of this polyurethane and the possibility of strain-induced PCL crystals as the switching phase for shape memory materials, allowed a strain recovery ratio and a strain fixity ratio with values higher than 95% and 90%, respectively, with a repeatability of the shape-memory properties up to 4 thermo-mechanical cycles. Overall, the properties of lysine-based polyurethanes are suitable for large diameter vascular grafts where cell alignment can be controlled by their shape memory potential.
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Affiliation(s)
- O Castillo-Cruz
- Centro de Investigación Científica de Yucatán, A.C., Unidad de Materiales, Calle 43 # 130 x 32 y 34, Col. Chuburná de Hidalgo, 97205 Mérida, Yucatán, Mexico
| | - F Avilés
- Centro de Investigación Científica de Yucatán, A.C., Unidad de Materiales, Calle 43 # 130 x 32 y 34, Col. Chuburná de Hidalgo, 97205 Mérida, Yucatán, Mexico
| | - R Vargas-Coronado
- Centro de Investigación Científica de Yucatán, A.C., Unidad de Materiales, Calle 43 # 130 x 32 y 34, Col. Chuburná de Hidalgo, 97205 Mérida, Yucatán, Mexico
| | - J V Cauich-Rodríguez
- Centro de Investigación Científica de Yucatán, A.C., Unidad de Materiales, Calle 43 # 130 x 32 y 34, Col. Chuburná de Hidalgo, 97205 Mérida, Yucatán, Mexico.
| | - L H Chan-Chan
- CONACyT-Universidad de Sonora, Blvd. Luis Encinas y Rosales, Centro, C.P. 83000, Hermosillo, Sonora, Mexico
| | - V Sessini
- Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), C/ Juan de la Cierva 3, 28006 Madrid, Spain
| | - L Peponi
- Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), C/ Juan de la Cierva 3, 28006 Madrid, Spain
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López-Peña IY, Castillo-Ortega MM, Plascencia-Martínez DF, Félix-Núñez A, Rodríguez-Félix DE, Del Castillo-Castro T, Encinas-Encinas JC, Santacruz-Ortega H, Rodríguez-Félix F, Cauich-Rodríguez JV, Burruel-Ibarra S, Hernandez-Martínez D, Quiroz-Castillo JM. Study of the release kinetics of (−) epicatechin: Effect of its location within the fiber or sphere. J Appl Polym Sci 2019. [DOI: 10.1002/app.47166] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- I. Y. López-Peña
- Departamento de Investigación en Polímeros y Materiales; Universidad de Sonora; Rosales y Blvrd. Luis Encinas, C.P., 83000, Hermosillo, Sonora Mexico
| | - M. M. Castillo-Ortega
- Departamento de Investigación en Polímeros y Materiales; Universidad de Sonora; Rosales y Blvrd. Luis Encinas, C.P., 83000, Hermosillo, Sonora Mexico
| | - D. F. Plascencia-Martínez
- Departamento de Investigación en Polímeros y Materiales; Universidad de Sonora; Rosales y Blvrd. Luis Encinas, C.P., 83000, Hermosillo, Sonora Mexico
| | - A. Félix-Núñez
- Departamento de Investigación en Polímeros y Materiales; Universidad de Sonora; Rosales y Blvrd. Luis Encinas, C.P., 83000, Hermosillo, Sonora Mexico
| | - D. E. Rodríguez-Félix
- Departamento de Investigación en Polímeros y Materiales; Universidad de Sonora; Rosales y Blvrd. Luis Encinas, C.P., 83000, Hermosillo, Sonora Mexico
| | - T. Del Castillo-Castro
- Departamento de Investigación en Polímeros y Materiales; Universidad de Sonora; Rosales y Blvrd. Luis Encinas, C.P., 83000, Hermosillo, Sonora Mexico
| | - J. C. Encinas-Encinas
- Departamento de Investigación en Polímeros y Materiales; Universidad de Sonora; Rosales y Blvrd. Luis Encinas, C.P., 83000, Hermosillo, Sonora Mexico
| | - H. Santacruz-Ortega
- Departamento de Investigación en Polímeros y Materiales; Universidad de Sonora; Rosales y Blvrd. Luis Encinas, C.P., 83000, Hermosillo, Sonora Mexico
| | - F. Rodríguez-Félix
- Departamento de Investigación y Posgrado en Alimentos; Universidad de Sonora; Rosales y Blvrd. Luis Encinas, C.P., 83000, Hermosillo, Sonora Mexico
| | - J. V. Cauich-Rodríguez
- Centro de Investigación Científica de Yucatán; Calle 43 No. 130, Chuburná de Hidalgo, C.P., 97205, Mérida, Yucatán Mexico
| | - S. Burruel-Ibarra
- Departamento de Investigación en Polímeros y Materiales; Universidad de Sonora; Rosales y Blvrd. Luis Encinas, C.P., 83000, Hermosillo, Sonora Mexico
| | - D. Hernandez-Martínez
- Departamento de Investigación en Polímeros y Materiales; Universidad de Sonora; Rosales y Blvrd. Luis Encinas, C.P., 83000, Hermosillo, Sonora Mexico
| | - J. M. Quiroz-Castillo
- Programa Educativo de Ingeniería Ambiental; Universidad Estatal de Sonora; Ley Federal del Trabajo, Col. Apolo C.P., 83100, Hermosillo, Sonora Mexico
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Pérez-Aranda C, Gamboa F, Castillo-Cruz O, Cauich-Rodríguez JV, Avilés F. Design and analysis of a burst strength device for testing vascular grafts. Rev Sci Instrum 2019; 90:014301. [PMID: 30709208 DOI: 10.1063/1.5037578] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Accepted: 12/15/2018] [Indexed: 06/09/2023]
Abstract
The design and analysis of a device to measure the burst strength (strength under a state of pure radial internal pressure) and compliance of vascular grafts and flexible pressurized tubes is presented. The device comprises three main sections, viz., a clean air-dry pressure controller, a test specimen holder, and automated software for control and data collection. Air pressure is controlled by means of a valve and a dedicated mechanism allowing reaching up to 120 psi in increments of 1 psi, and recording pressure changes with 0.04 psi resolution. The circumferential strain is determined by measuring the radial displacement of the vascular graft using an optical arrangement capable of determining a maximum radial displacement of 10 mm with 0.02 mm resolution. The instrument provides a low uncertainty in compliance (±0.32%/100 mm Hg-1) and burst strength measurements. Due to its simplicity, the device can easily be reproduced in other laboratories contributing to a dedicated instrument with high resolution at low cost. The reliability of the apparatus is further confirmed by conducting finite element analysis, elasticity solutions for pressurized cylinders, and testing of small diameter vascular grafts made of a commercial aliphatic polyurethane tested under radial internal pressure.
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Affiliation(s)
- C Pérez-Aranda
- Centro de Investigación Científica de Yucatán, A.C., Unidad de Materiales, Calle 43 #130 x 32 y 34, Col. Chuburná de Hidalgo, C.P. 97205 Mérida, Yucatán, Mexico
| | - F Gamboa
- Centro de Investigación y de Estudios Avanzados, Unidad Mérida, Departamento de Física Aplicada, A.P. 73 Cordemex, 97310 Mérida, Yucatán, Mexico
| | - O Castillo-Cruz
- Centro de Investigación Científica de Yucatán, A.C., Unidad de Materiales, Calle 43 #130 x 32 y 34, Col. Chuburná de Hidalgo, C.P. 97205 Mérida, Yucatán, Mexico
| | - J V Cauich-Rodríguez
- Centro de Investigación Científica de Yucatán, A.C., Unidad de Materiales, Calle 43 #130 x 32 y 34, Col. Chuburná de Hidalgo, C.P. 97205 Mérida, Yucatán, Mexico
| | - F Avilés
- Centro de Investigación Científica de Yucatán, A.C., Unidad de Materiales, Calle 43 #130 x 32 y 34, Col. Chuburná de Hidalgo, C.P. 97205 Mérida, Yucatán, Mexico
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Herrera-Kao WA, Loría-Bastarrachea MI, Pérez-Padilla Y, Cauich-Rodríguez JV, Vázquez-Torres H, Cervantes-Uc JM. Thermal degradation of poly(caprolactone), poly(lactic acid), and poly(hydroxybutyrate) studied by TGA/FTIR and other analytical techniques. Polym Bull (Berl) 2018. [DOI: 10.1007/s00289-017-2260-3] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Lozano-Pérez C, Cauich-Rodríguez JV, Avilés F. Influence of rigid segment content on the piezoresistive behavior of multiwall carbon nanotube/segmented polyurethane composites. J Appl Polym Sci 2016. [DOI: 10.1002/app.44448] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- C. Lozano-Pérez
- Centro de Investigación Científica de Yucatán, Unidad de Materiales; Mérida Yucatán Mexico
| | - J. V. Cauich-Rodríguez
- Centro de Investigación Científica de Yucatán, Unidad de Materiales; Mérida Yucatán Mexico
| | - F. Avilés
- Centro de Investigación Científica de Yucatán, Unidad de Materiales; Mérida Yucatán Mexico
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Flores-Cedillo ML, Alvarado-Estrada KN, Pozos-Guillén AJ, Murguía-Ibarra JS, Vidal MA, Cervantes-Uc JM, Rosales-Ibáñez R, Cauich-Rodríguez JV. Multiwall carbon nanotubes/polycaprolactone scaffolds seeded with human dental pulp stem cells for bone tissue regeneration. J Mater Sci Mater Med 2016; 27:35. [PMID: 26704552 DOI: 10.1007/s10856-015-5640-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Accepted: 11/27/2015] [Indexed: 06/05/2023]
Abstract
Conventional approaches to bone regeneration rarely use multiwall carbon nanotubes (MWCNTs) but instead use polymeric matrices filled with hydroxyapatite, calcium phosphates and bioactive glasses. In this study, we prepared composites of MWCNTs/polycaprolactone (PCL) for bone regeneration as follows: (a) MWCNTs randomly dispersed on PCL, (b) MWCNTs aligned with an electrical field to determine if the orientation favors the growing of human dental pulp stem cells (HDPSCs), and (c) MWCNTs modified with β-glycerol phosphate (BGP) to analyze its osteogenic potential. Raman spectroscopy confirmed the presence of MWCNTs and BGP on PCL, whereas the increase in crystallinity by the addition of MWCNTs to PCL was confirmed by X-ray diffraction and differential scanning calorimetry. A higher elastic modulus (608 ± 4.3 MPa), maximum stress (42 ± 6.1 MPa) and electrical conductivity (1.67 × 10(-7) S/m) were observed in non-aligned MWCNTs compared with the pristine PCL. Cell viability at 14 days was similar in all samples according to the live/dead assay, but the 21 day cell proliferation, measured by MTT was higher in MWCNTs aligned with BGP. Von Kossa and Alizarin red showed larger amounts of mineral deposits on MWCNTs aligned with BGP, indicating that at 21 days, this scaffold promotes osteogenic differentiation of HDPSCs.
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Affiliation(s)
- M L Flores-Cedillo
- Facultad de Estomatología, Laboratorio de Ciencias Básicas, Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico
| | - K N Alvarado-Estrada
- Facultad de Estomatología, Laboratorio de Ciencias Básicas, Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico
| | - A J Pozos-Guillén
- Facultad de Estomatología, Laboratorio de Ciencias Básicas, Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico
| | - J S Murguía-Ibarra
- Facultad de Ciencias, Departamento de Electrónica, Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico
| | - M A Vidal
- Centro de Aplicación de Radiación Infrarroja, Energías Alternativas y Materiales, CIACYT, San Luis Potosí, Mexico
| | - J M Cervantes-Uc
- Centro de Investigación Científica de Yucatán, Unidad de Materiales, Mérida, Yucatán, Mexico
| | - R Rosales-Ibáñez
- Facultad de Estomatología, Laboratorio de Ciencias Básicas, Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico
| | - J V Cauich-Rodríguez
- Centro de Investigación Científica de Yucatán, Unidad de Materiales, Mérida, Yucatán, Mexico.
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Cetina-Diaz SM, Chan-Chan LH, Vargas-Coronado RF, Cervantes-Uc JM, Quintana-Owen P, Paakinaho K, Kellomaki M, Di Silvio L, Deb S, Cauich-Rodríguez JV. Physicochemical characterization of segmented polyurethanes prepared with glutamine or ascorbic acid as chain extenders and their hydroxyapatite composites. J Mater Chem B 2014; 2:1966-1976. [DOI: 10.1039/c3tb21500h] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Segmented polyurethanes with glutamine or ascorbic acid as chain extenders and their hydroxyapatite composites for bone tissue regeneration.
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Affiliation(s)
| | - L. H. Chan-Chan
- Centro de Investigación Científica de Yucatán A.C
- Mérida, Mexico
| | | | | | - P. Quintana-Owen
- Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional
- Mérida, Mexico
| | - K. Paakinaho
- Department of Electrical and Communications Engineering and BioMediTech
- Tampere University of Technology
- Tampere, Finland
| | - M. Kellomaki
- Department of Electrical and Communications Engineering and BioMediTech
- Tampere University of Technology
- Tampere, Finland
| | - L. Di Silvio
- King's College London Dental Institute
- London SEI 9 RT, UK
| | - S. Deb
- King's College London Dental Institute
- London SEI 9 RT, UK
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11
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Moo-Espinosa JI, Solís-Correa R, Vargas-Coronado R, Cervantes-Uc JM, Cauich-Rodríguez JV, Owen PQ, Aguilar-Santamaría MA, Gutiérrez MF, del Barrio JSR. Physicochemical and biological characterization of nanocomposites made of segmented polyurethanes and Cloisite 30B. J Biomater Appl 2013; 28:38-48. [PMID: 23812945 DOI: 10.1177/0885328212436706] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Nanocomposites were prepared with segmented polyurethanes and Cloisite 30B by either solution mixing or in situ polymerization and characterized by Fourier transform infrared spectroscopy, differential scanning calorimetry, thermogravimetric analysis and X-ray diffraction. Cytotoxicity and genotoxicity were assessed with lymphocytes while cell viability was measured by the methyl tetrazolium assay using fibroblasts. It was found that in situ polymerization rendered exfoliated nanocomposites with higher glass transition temperature, tensile modulus and thermal stability compared to nanocomposites obtained by solution mixing. The mitotic index of lymphocytes was significantly reduced at high clay concentrations (6 wt% and 10 wt%), while fibroblast viability improved in the presence of extract obtained after days 2 and 7.
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12
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Chan-Chan LH, Vargas-Coronado RF, Cervantes-Uc JM, Cauich-Rodríguez JV, Rath R, Phelps EA, García AJ, San Román Del Barrio J, Parra J, Merhi Y, Tabrizian M. Platelet adhesion and human umbilical vein endothelial cell cytocompatibility of biodegradable segmented polyurethanes prepared with 4,4'-methylene bis(cyclohexyl isocyanate), poly(caprolactone) diol and butanediol or dithioerythritol as chain extenders. J Biomater Appl 2012; 28:270-7. [PMID: 22684514 DOI: 10.1177/0885328212448259] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Biodegradable segmented polyurethanes were prepared with poly(caprolactone) diol as a soft segment, 4,4'-methylene bis(cyclohexyl isocyanate) (HMDI) and either butanediol or dithioerythritol as chain extenders. Platelet adhesion was similar in all segmented polyurethanes studied and not different from Tecoflex® although an early stage of activation was observed on biodegradable segmented polyurethane prepared with dithioerythritol. Relative viability was higher than 80% on human umbilical vein endothelial cells in contact with biodegradable segmented polyurethane extracts after 1, 2 and 7 days. Furthermore, both biodegradable segmented polyurethane materials supported human umbilical vein endothelial cell adhesion, spreading, and viability similar to Tecoflex® medical-grade polyurethane. These biodegradable segmented polyurethanes represent promising materials for cardiovascular applications.
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Affiliation(s)
- L H Chan-Chan
- Centro de Investigación Científica de Yucatán, A.C., Calle 43 # 130 Col. Chuburná de Hidalgo, Mérida, Yucatán, México
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13
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Cervantes-Uc JM, Cauich-Rodríguez JV, Vázquez-Torres H. Structure–property relationships of DEAEM-containing bone cements: effect of the substitution of a methylene group by an aromatic ring. Journal of Biomaterials Science, Polymer Edition 2012; 18:1-16. [PMID: 17274447 DOI: 10.1163/156856207779146169] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
New aromatic methacrylates were prepared by substitution of a methylene group from diethylaminoethyl methacrylate (DEAEM) by an aromatic ring at two different positions. Diethylamino benzyl methacrylate (DEABM) and N-methacryloyloxyethyl)-N-ethyl-m-toluidine (MEET) were polymerized and incorporated as co-monomers in bone cement formulations. Cements were evaluated in terms of curing and mechanical properties in addition to changes in their glass transition temperature by DSC and surface properties by contact angle measurements. The immediate effect of the presence of an aromatic ring within the amino methacrylate was that it modified the bone cements' physical appearance, as colored products were obtained. It was also observed that peak temperature increased and setting time decreased by the use of DEABM and MEET instead of DEAEM. Simultaneously, both tensile and compressive strength of bone cements were improved; this effect was related to a higher glass transition temperature. In addition, surface properties of cements were modified by the incorporation of the aromatic ring, being more hydrophilic at low molar fractions and more hydrophobic at high molar fractions. Based on these studies, it is concluded that the position of the aromatic ring within the amino methacrylate modified not only the cement's appearance, but also the setting and mechanical properties.
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Affiliation(s)
- J M Cervantes-Uc
- Centro de Investigación Científica de Yucatán, A.C. Calle 43 No. 130, Col. Chuburná de Hidalgo, C.P. 97200 Mérida, Yucatán, México.
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14
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Solís-Correa RE, Vargas-Coronado R, Aguilar-Vega M, Cauich-Rodríguez JV, Román JS, Marcos A. Synthesis of HMDI-based segmented polyurethanes and their use in the manufacture of elastomeric composites for cardiovascular applications. Journal of Biomaterials Science, Polymer Edition 2012; 18:561-78. [PMID: 17550659 DOI: 10.1163/156856207780852488] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
For short-term cardiovascular application, segmented polyurethanes (SPUs) based on 4,4-methylenebis(cyclohexyl isocyanate) (HMDI), polytetramethylenglycol (PTMG) and 1,4-butanediol (BD) were synthesized and characterized by spectroscopy (FT-IR, (1)H-NMR) and thermal (TGA, DMA, DSC) and mechanical techniques. The segmented nature of the SPUs was not easily established by spectroscopic means; however, TGA allowed the quantification of the rigid segments content by the significant mass loss between 348 and 356 degrees C. The alpha transition was detected by DMA and related to the T(g) of the soft segments at -50 degrees C, while DSC showed the presence of an endothermic transition above 80 degrees C attributed to the melting of rigid segments. Two types of composites were prepared using the synthesized SPUs and Lycra (either T162B or T162C). The first one consisted of a two layers casting laminated while the second one was a classic unidirectional fibre-reinforced material. Laminate composites prepared with SPU containing 23.9% and 33.9% of rigid segments and Lycra T162C exhibited a higher tensile modulus but lower tensile strength than composites prepared with Tecoflex SG-80A (39.7% of rigid segments). The energy of adhesion between layers on these composites ranged from 475 to 2150 J. Fibre-reinforced SPUs exhibited higher moduli than the two layer laminated composites with increasing amounts of rigid segments in the matrix and by increasing Lycra T162C content (up to 10%). This behaviour was explained by SEM, which showed a good fibre-matrix bonding.
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Affiliation(s)
- R E Solís-Correa
- Unidad de Materiales, Centro de Investigación Científica de Yucatán, A.C. Calle 43 #130, Col. Chuburná de Hidalgo, 97200, Mérida, Yucatán, México.
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15
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Chan-Chan LH, Solis-Correa R, Vargas-Coronado RF, Cervantes-Uc JM, Cauich-Rodríguez JV, Quintana P, Bartolo-Pérez P. Degradation studies on segmented polyurethanes prepared with HMDI, PCL and different chain extenders. Acta Biomater 2010; 6:2035-44. [PMID: 20004749 DOI: 10.1016/j.actbio.2009.12.010] [Citation(s) in RCA: 101] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2009] [Revised: 10/30/2009] [Accepted: 12/04/2009] [Indexed: 11/27/2022]
Abstract
Biodegradable segmented polyurethanes (BSPUs) were prepared with poly(caprolactone) as a soft segment, 4,4'-methylene bis (cyclohexyl isocyanate) and either butanediol (BSPU1) or dithioerythritol (BSPU2) as a chain extender. BSPU samples were characterized in terms of their physicochemical properties and their hemocompatibility. Polymers were then degraded in acidic (HCl 2N), alkaline (NaOH 5M) and oxidative (H(2)O(2) 30wt.%) media and characterized by their mass loss, Fourier transform infrared (FTIR), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), X-ray diffraction (XRD) and scanning electron microscopy (SEM). Undegraded BSPU1 and BSPU2 exhibited different properties, such as the glass transition temperature T(g) of the soft segment (-25 vs. 4 degrees C), mechanical properties (600% vs. 900% strain to break) and blood coagulating properties (clotting time=11.46 vs. 8.13min). After acidic and alkaline degradation, the disappearance of the 1728cm(-1) band of polycaprolactone (PCL) on both types of BSPU was detected by FTIR. However, the oxidative environment did not affect the soft segment severely as the presence of PCL crystalline domains were observed both by DSC (melting temperature T(m)=52.8 degrees C) and XRD (2theta=21.3 degrees and 23.7 degrees ). By TGA three decomposition temperatures were recorded for both BSPU samples, but the higher decomposition temperature was enhanced after acidic and alkaline degradation. The formation of the porous structure on BSPU1 was observed by SEM, while a granular surface was observed on BSPU2 after alkaline degradation.
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Affiliation(s)
- L H Chan-Chan
- Centro de Investigación Científica de Yucatán, A.C., Calle 43 # 130 Col. Chuburná de Hidalgo, Mérida, Yucatán, Mexico
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16
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Canul-Chuil A, Vargas-Coronado R, Cauich-Rodríguez JV, Martínez-Richa A, Fernandez E, Nazhat SN. Comparative study of bone cements prepared with either HA or alpha-TCP and functionalized methacrylates. J Biomed Mater Res B Appl Biomater 2003; 64:27-37. [PMID: 12474244 DOI: 10.1002/jbm.b.10486] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The properties of bone cements prepared with both hydroxyapatite (HA) and alpha-tricalcium phosphate (alpha-TCP) and methacrylates containing acidic or basic groups are the main interest of this article. The presence of methacrylic acid or diethyl amino ethyl methacrylate as comonomers in the bone cement and both ceramic types as filler were found not to affect the amount of residual monomer, which was generally less than 4.5 wt%. In contrast, setting times, maximum temperature, and glass transition temperature were found to be composition dependent. For samples with acidic comonomer, a faster setting time, a higher maximum temperature, and higher glass transition temperatures were observed compared to those with the basic comonomer. The presence of the fillers slightly increased the setting time but did not affect the other parameters. The mechanical properties of the filled bone cements depended mainly on composition and type of testing. Both HA or alpha-TCP filled systems fulfilled the minimum compressive strength required for bone cement application, although a significantly lower value was observed for the alkaline comonomer systems. The minimum bending strength was not satisfied by any of these formulations. The tensile and shear strength of these composites ranged from 20 to 37.9 and from 18 to 27 MPa, respectively. In all cases it was higher for bone cements containing methacrylic acid. The results of this study suggest that the properties of dry unfilled bone cements prepared with MAA are comparable to CMW 3 in mechanical terms but inferior in their setting properties.
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Affiliation(s)
- A Canul-Chuil
- Centro de Investigación Científica de Yucatán, A.C., Apartado Postal 87, Cordemex C.P.97310, Mérida, Yucatán, México
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Islas-Blancas ME, Cervantes JM, Vargas-Coronado R, Cauich-Rodríguez JV, Vera-Graziano R, Martinez-Richa A. Characterization of bone cements prepared with functionalized methacrylates and hydroxyapatite. J Biomater Sci Polym Ed 2002; 12:893-910. [PMID: 11718483 DOI: 10.1163/156856201753113088] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Bone cements prepared with methyl methacrylate and either methacrylic acid or diethyl amino ethyl methacrylate as comonomers were characterized by infrared spectroscopy, nuclear magnetic resonance, gel permeation chromatography, dynamic mechanical thermal analysis, and mechanical testing. Selected formulations containing these functionalized methacrylates were filled with hydroxyapatite and studied in terms of their properties in tension, compression and bending, and X-ray diffraction. It was found that residual monomer was not greatly affected by the presence of either acid or basic comonomers in the unfilled bone cements. In contrast, molecular weight, curing times, and glass transition temperature were composition dependent. For samples with acidic comonomer, a faster curing time, higher molecular weight, and higher glass transition temperatures were observed with respect to those with the basic comonomer. X-ray diffraction revealed that the crystalline structure was not affected by the nature of comonomer in the bone cement while scanning electron microscopy showed that hydroxyapatite remained as clusters in the bone cement. The mechanical properties of filled bone cements depended mainly on composition and type of testing. Hydroxyapatite-filled bone cements fullfilled the minimum compressive strength (70 MPa) required for bone cement use. However, the minimum tensile strength (30 MPa) was only fullfilled by cements prepared without comonomer and those containing methacrylic acid. The minimum bending strength requirement (50 MPa) was not satisfied by any of the formulations studied.
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Cauich-Rodríguez JV, Deb S, Smith R. Physicochemical characterization of hydrogels based on polyvinyl alcohol-vinyl acetate blends. J Appl Polym Sci 2001. [DOI: 10.1002/app.2220] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Vázquez-Torres H, Cauich-Rodríguez JV, Cruz-Ramos CA. Poly(vinyl alcohol)/poly(acrylic acid) blends: Miscibility studies by DSC and characterization of their thermally induced hydrogels. J Appl Polym Sci 1993. [DOI: 10.1002/app.1993.070500505] [Citation(s) in RCA: 54] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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