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Siddiq A, Ghobashy MM, El-Adasy ABAAM, Ashmawy AM. Gamma radiation-induced grafting of poly(butyl acrylate) onto ethylene vinyl acetate copolymer for improved crude oil flowability. Sci Rep 2024; 14:8863. [PMID: 38632269 PMCID: PMC11024112 DOI: 10.1038/s41598-024-58521-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Accepted: 03/31/2024] [Indexed: 04/19/2024] Open
Abstract
Ethylene vinyl acetate (EVA) copolymers are widely employed as pour point depressants to enhance the flow properties of crude oil. However, EVA copolymers have limitations that necessitate their development. This work investigated the modification of EVA via gamma radiation-induced grafting of butyl acrylate (BuA) monomers and the evaluation of grafted EVA as a pour point depressant for crude oil. The successful grafting of poly(butyl acrylate) p(BuA) onto EVA was verified through grafting parameters, FTIR spectroscopy, and 1H NMR spectroscopy. Treating crude oil with 3000 ppm of (EVA)0kGy, (EVA)50kGy, and (1EVA:3BuA)50kGy yielded substantial reductions in pour point of 24, 21, and 21 °C, respectively. Also, rheological characterization demonstrated improving evidenced by a viscosity reduction of 76.20%, 67.70%, and 71.94% at 25 °C, and 83.16%, 74.98%, and 81.53% at 12 °C. At low dosages of 1000 ppm, the EVA-g-p(BuA) exhibited superior pour point reductions compared to unmodified EVA, highlighting the benefit of incorporating p(BuA) side chains. The grafted EVA copolymers with p(BuA) side chains showed excellent potential as crude oil flow improvers by promoting more effective adsorption and co-crystallization with paraffin wax molecules.
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Affiliation(s)
- Ahmed Siddiq
- Department of Chemistry, Faculty of Science, Al-Azhar University, Assiut, 71524, Egypt
| | - Mohamed M Ghobashy
- Radiation Research of Polymer Chemistry Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
| | | | - Ashraf M Ashmawy
- Department of Chemistry, Faculty of Science, Al-Azhar University, Cairo, 11884, Egypt.
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2
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Niu K, Song K. Synthesis and Characterization of Maleic Anhydride-Methyl Methacrylate Co-Monomer Grafted Polyethylene Wax for Hot Waxed Wood Process. MATERIALS (BASEL, SWITZERLAND) 2022; 15:6962. [PMID: 36234305 PMCID: PMC9572140 DOI: 10.3390/ma15196962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 09/21/2022] [Accepted: 10/01/2022] [Indexed: 06/16/2023]
Abstract
The beeswax used in Chinese traditional hot waxed wood technology has several drawbacks, such as high price, scarce resources, and poor heat resistance. To expand the application of hot waxing technology in the field of wood decoration and protection, polyethylene wax was modified by a grafted maleic anhydride-methyl methacrylate co-monomer. A type of modified polyethylene wax with low cost, high melting point, high stability, and strong polarity suitable for hot waxed wood was prepared as a replacement for beeswax. The effects of the grafting conditions on the chemical properties, thermal properties, chemical structure, and crystallization properties of modified polyethylene wax were studied and compared to those of beeswax. The results show that maleic anhydride-methyl methacrylate co-monomer grafting can effectively improve the acid value of polyethylene wax. For the ratio of two monomers of 1/1, the total amount of monomer of 8 wt%, the amount of initiator of 2 wt%, the reaction temperature of 150 °C, and the acid value of modified polyethylene wax was consistent with that of beeswax, realizing the simulation of the main chemical properties of beeswax. The thermal stability and melting temperature of the modified polyethylene wax are significantly higher than those of beeswax, its crystal structure is similar to that of beeswax, and the cyclic anhydride groups and ester groups introduced by co-monomer grafting endow it with polar groups that play an important role in the wood hot waxing process.
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Gómez-Cerezo MN, Patel R, Vaquette C, Grøndahl L, Lu M. In vitro evaluation of porous poly(hydroxybutyrate-co-hydroxyvalerate)/akermanite composite scaffolds manufactured using selective laser sintering. BIOMATERIALS ADVANCES 2022; 135:212748. [PMID: 35929220 DOI: 10.1016/j.bioadv.2022.212748] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 02/22/2022] [Accepted: 03/04/2022] [Indexed: 10/18/2022]
Abstract
Incorporation of a bioactive mineral filler in a biodegradable polyester scaffold is a promising strategy for scaffold assisted bone tissue engineering (TE). The current study evaluates the in vitro behavior of poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV)/Akermanite (AKM) composite scaffolds manufactured using selective laser sintering (SLS). Exposure of the mineral filler on the surface of the scaffold skeleton was evident from in vitro mineralization in PBS. PHBV scaffolds and solvent cast films served as control samples and all materials showed preferential adsorption of fibronectin compared to serum albumin as well as non-cytotoxic response in human osteoblasts (hOB) at 24 h. hOB culture for up to 21 days revealed that the metabolic activity in PHBV films and scaffolds was significantly higher than that of PHBV/AKM scaffolds within the first two weeks of incubation. Afterwards, the metabolic activity in PHBV/AKM scaffolds exceeded that of the control samples. Confocal imaging showed cell penetration into the porous scaffolds. Significantly higher ALP activity was observed in PHBV/AKM scaffolds at all time points in both basal and osteogenic media. Mineralization during cell culture was observed on all samples with PHBV/AKM scaffolds exhibiting distinctly different mineral morphology. This study has demonstrated that the bioactivity of PHBV SLS scaffolds can be enhanced by incorporating AKM, making this an attractive candidate for bone TE application.
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Affiliation(s)
| | - Rushabh Patel
- School of Mechanical and Mining Engineering, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Cedryck Vaquette
- School of Dentistry, The University of Queensland, Herston, QLD 4006, Australia
| | - Lisbeth Grøndahl
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, QLD 4072, Australia.
| | - Mingyuan Lu
- School of Dentistry, The University of Queensland, Herston, QLD 4006, Australia.
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Ochoa-Segundo EI, González-Torres M, Cabrera-Wrooman A, Sánchez-Sánchez R, Huerta-Martínez BM, Melgarejo-Ramírez Y, Leyva-Gómez G, Rivera-Muñoz EM, Cortés H, Velasquillo C, Vargas-Muñoz S, Rodríguez-Talavera R. Gamma radiation-induced grafting of n-hydroxyethyl acrylamide onto poly(3-hydroxybutyrate): A companion study on its polyurethane scaffolds meant for potential skin tissue engineering applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 116:111176. [PMID: 32806310 DOI: 10.1016/j.msec.2020.111176] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 05/20/2020] [Accepted: 06/07/2020] [Indexed: 12/13/2022]
Abstract
This study aimed at investigating the synthesis, characterization, and search for a biotechnological application proposal for poly [(R)-3-hydroxybutyric acid] (PHB) grafted with the n-hydroxyethyl acrylamide (HEAA) monomer. The novel copolymer was prepared by 60Co gamma radiation-induced-graft polymerization. The effect of different solvents in the graft polymerization; the degree of grafting, crystallinity, and hydrophilicity; the morphology and the thermal properties were evaluated. The polyurethane fabricated from the grafted PHB was suggested as a scaffold. The enzymatic degradation behavior and the spectroscopic, morphological, mechanical, and biological properties of the composites were assessed. According to the results, the successful grafting of HEAA onto PHB was verified. The grafting was significantly affected by the type of solvent employed. A decreased crystallinity and increased hydrophilicity of the graft copolymer, concerning the PHB, was found. An increased roughness was observed in the morphology of the polymer after grafting. The thermodynamic parameters, except for the glass transition temperature, also decreased for the synthetic biopolymer. The intended use of these scaffolds for skin tissue engineering was supported by a proper degradability and degree of porosity, improved mechanical properties, the optimal culture of human fibroblasts, and its transfection with a plasmid vector containing an enhanced green fluorescent protein.
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Affiliation(s)
- Eric Ivan Ochoa-Segundo
- Departamento de Farmacia, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad de Mexico 04510, Mexico
| | - Maykel González-Torres
- Laboratorio de Biotecnología, Instituto Nacional de Rehabilitación "Luís Guillermo Ibarra", Ciudad de Mexico 14389, Mexico.
| | - Alejandro Cabrera-Wrooman
- Laboratorio de Tejido Conjuntivo, Instituto Nacional de Rehabilitación "Luís Guillermo Ibarra", Ciudad de Mexico 14389, Mexico.
| | - Roberto Sánchez-Sánchez
- Unidad de Ingeniería de Tejidos, Terapia celular y Medicina Regenerativa, Instituto Nacional de Rehabilitación "Luís Guillermo Ibarra", Ciudad de Mexico 14389, Mexico
| | | | - Yaaziel Melgarejo-Ramírez
- Laboratorio de Biotecnología, Instituto Nacional de Rehabilitación "Luís Guillermo Ibarra", Ciudad de Mexico 14389, Mexico
| | - Gerardo Leyva-Gómez
- Departamento de Farmacia, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad de Mexico 04510, Mexico
| | - Eric M Rivera-Muñoz
- Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México, 76230, Mexico
| | - Hernán Cortés
- Departamento de Genética, Laboratorio de Medicina Genómica, Instituto Nacional de Rehabilitación "Luís Guillermo Ibarra", Ciudad de Mexico 14389, Mexico
| | - Cristina Velasquillo
- Laboratorio de Biotecnología, Instituto Nacional de Rehabilitación "Luís Guillermo Ibarra", Ciudad de Mexico 14389, Mexico
| | - Susana Vargas-Muñoz
- Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México, 76230, Mexico
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Rosado D, Meléndez-Ortiz HI, Ortega A, Gallardo-Vega C, Burillo G. Modification of poly(tetrafluoroethylene) with polyallylamine by gamma radiation. Radiat Phys Chem Oxf Engl 1993 2020. [DOI: 10.1016/j.radphyschem.2020.108766] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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6
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Thiol-based chemistry as versatile routes for the effective functionalization of cellulose nanofibers. Carbohydr Polym 2019; 226:115259. [DOI: 10.1016/j.carbpol.2019.115259] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Revised: 08/25/2019] [Accepted: 08/26/2019] [Indexed: 11/17/2022]
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Diermann SH, Lu M, Dargusch M, Grøndahl L, Huang H. Akermanite reinforced PHBV scaffolds manufactured using selective laser sintering. J Biomed Mater Res B Appl Biomater 2019; 107:2596-2610. [DOI: 10.1002/jbm.b.34349] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 02/15/2019] [Accepted: 02/18/2019] [Indexed: 12/30/2022]
Affiliation(s)
- Sven H. Diermann
- School of Mechanical and Mining EngineeringThe University of Queensland Queensland Australia
| | - Mingyuan Lu
- School of Mechanical and Mining EngineeringThe University of Queensland Queensland Australia
| | - Matthew Dargusch
- School of Mechanical and Mining EngineeringThe University of Queensland Queensland Australia
| | - Lisbeth Grøndahl
- School of Chemistry and Molecular BiosciencesThe University of Queensland Queensland Australia
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland Queensland Australia
| | - Han Huang
- School of Mechanical and Mining EngineeringThe University of Queensland Queensland Australia
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Feng Y, Peng C, Deng Q, Li Y, Hu J, Wu Q. Annealing and Stretching Induced High Energy Storage Properties in All-Organic Composite Dielectric Films. MATERIALS 2018; 11:ma11112279. [PMID: 30441847 PMCID: PMC6266785 DOI: 10.3390/ma11112279] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 11/09/2018] [Accepted: 11/12/2018] [Indexed: 11/16/2022]
Abstract
High discharged energy density and charge⁻discharge efficiency, in combination with high electric breakdown strength, maximum electric displacement and low residual displacement, are very difficult to simultaneously achieve in single-component polymer dielectrics. Plenty of researches have reported polymer based composite dielectrics filled with inorganic fillers, through complex surface modification of inorganic fillers to improve interface compatibility. In this work, a novel strategy of introducing environmentally-friendly biological polyester into fluoropolymer matrix has been presented to prepare all-organic polymer composites with desirable high energy storage properties by solution cast process (followed by annealing or stretching post-treatment), in order to simplify the preparation steps and lower the cost. Fluoropolymer with substantial ferroelectric domains (contributing to high dielectric response) as matrix and poly (3-hydroxybutyrate-co-3-hydroxyvalerate) with excellent linear polarization property (resulting in high breakdown strength) as filler were employed. By high-temperature annealing, the size of ferroelectric domains could be improved and interfacial air defects could be removed, leading to elevated high energy storage density and efficiency in composite. By mono-directional stretching, the ferroelectric domains and polyester could be regularly oriented along stretching direction, resulting in desired high energy storage performances as well. Besides, linear dielectric components could contribute to high efficiency from their strong rigidity restrain effect on ferroelectric component. This work might open up the way for a facile fabrication of promising all-organic composite dielectric films with high energy storage properties.
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Affiliation(s)
- Yefeng Feng
- School of Materials Science and Engineering, Yangtze Normal University, Chongqing 408100, China.
| | - Cheng Peng
- School of Materials Science and Engineering, Yangtze Normal University, Chongqing 408100, China.
| | - Qihuang Deng
- School of Materials Science and Engineering, Yangtze Normal University, Chongqing 408100, China.
| | - Yandong Li
- School of Materials Science and Engineering, Yangtze Normal University, Chongqing 408100, China.
| | - Jianbing Hu
- School of Materials Science and Engineering, Yangtze Normal University, Chongqing 408100, China.
| | - Qin Wu
- Department of Fashion Communication and Media, Jiangxi Institute of Fashion Technology, Nanchang 330201, China.
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Diermann SH, Lu M, Edwards G, Dargusch M, Huang H. In vitro degradation of a unique porous PHBV scaffold manufactured using selective laser sintering. J Biomed Mater Res A 2018; 107:154-162. [PMID: 30358091 DOI: 10.1002/jbm.a.36543] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 08/10/2018] [Accepted: 09/05/2018] [Indexed: 12/20/2022]
Abstract
Biodegradable poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) scaffolds have shown great promise for bone tissue engineering applications. The investigation of their hydrolytic degradation is thus essential to understand the effect of hydrolysis on the complex biodegradation behavior of PHBV scaffolds. In this study, we investigated the degradation behavior of high molecular weight PHBV scaffolds manufactured using selective laser sintering (SLS) without using predesigned porous architectures. The manufactured scaffolds have high specific surface areas with great water-uptake abilities. After an incubation of 6 weeks in phosphate-buffered saline solution, the structural integrity of the scaffolds was unaffected. However, a significant decrease in molecular weight ranging from 39% to 46% was found. The measured weight loss was negligible, but their compressive modulus and strength both decreased, likely due to water plasticization. These findings suggest that hydrolytic degradation of PHBV by means of bulk degradation was the predominant mechanism, attributed to their excellent water absorptivity. Overall, the PHBV scaffolds manufactured using SLS exhibited adequate mechanical properties and satisfactory structural integrity after incubation. As a result, the scaffolds have great potential as candidates for bone repair in clinical practice. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 107A: 154-162, 2019.
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Affiliation(s)
- Sven H Diermann
- School of Mechanical and Mining Engineering, The University of Queensland, Queensland, 4072, Australia
| | - Mingyuan Lu
- School of Mechanical and Mining Engineering, The University of Queensland, Queensland, 4072, Australia
| | - Grant Edwards
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Queensland, 4072, Australia
| | - Matthew Dargusch
- School of Mechanical and Mining Engineering, The University of Queensland, Queensland, 4072, Australia
| | - Han Huang
- School of Mechanical and Mining Engineering, The University of Queensland, Queensland, 4072, Australia
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González-Torres M, Sánchez-Sánchez R, Solís-Rosales SG, Brostow W, Reyes-Cervantes E, Gutiérrez-Uribe JA, Silva-Bermúdez P, de los Angeles Moyaho-Bernal M, Velasquillo-Martínez MC. Poly(3-hydroxybutyrate) graft copolymer dense membranes for human mesenchymal stem cell growth. ELECTRON J BIOTECHN 2018. [DOI: 10.1016/j.ejbt.2018.05.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022] Open
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11
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In vitro mineralization of dual grafted polytetrafluoroethylene membranes. Biointerphases 2017; 12:02C413. [PMID: 28565915 DOI: 10.1116/1.4984012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The modification of biomaterials by radiation induced grafting is a promising method to improve their bioactivity. Successful introduction of carboxyl and amine functional groups on the surface of a polytetrafluoroethylene membrane was achieved by grafting of acrylic acid (AA) and 2-aminoethyl methacrylate hydrochloride (AEMA) using simultaneous gamma irradiation grafting. Chemical characterization by attenuated total reflectance Fourier transform infrared spectroscopy and x-ray photoelectron spectroscopy confirmed the presence of amine and carboxylate functionalities and indicated that all protonated amines formed ion pairs with carboxyl groups, but not all carboxyl are involved in ion pairing. It was found that the irradiation doses (2, 5, or 10 kGy) affected the grafting outcome only when sulfuric acid (0.5 or 0.9 M) was added as a polymerization enhancer. The use of the inorganic acid successfully enhanced the total graft yield (GY), but the changes in the graft extent (GE) were not conclusive. Dual functional films were produced by either a one- or a two-step process. Generally, higher GY and GE values were observed for the samples produced by the two-step grafting of AA and AEMA. The in vitro mineralization in 1.5× simulated body fluid (SBF) induced the formation of carbonated hydroxyapatite as verified by FITR. All samples showed an increase in weight after mineralization with significantly larger increases observed for the samples which had the 1.5× SBF changed every third day compared to every seventh. For the dual functional samples, it was found that the sample grafted by the one-step method shows a significantly higher increase in weight despite a much lower GY compared to the sample prepared by the two-step method and this was attributed to the different architecture of grafted chains.
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Reyes AP, Martínez Torres A, Carreón Castro MDP, Rodríguez Talavera JR, Muñoz SV, Aguilar VMV, Torres MG. Novel Poly(3-hydroxybutyrate-g-vinyl alcohol) Polyurethane Scaffold for Tissue Engineering. Sci Rep 2016; 6:31140. [PMID: 27502732 PMCID: PMC4977462 DOI: 10.1038/srep31140] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Accepted: 07/12/2016] [Indexed: 12/21/2022] Open
Abstract
The design of new synthetic grafted poly(3-hydroxybutyrate) as composite 3D-scaffolds is a convenient alternative for tissue engineering applications. The chemically modified poly(3-hydroxybutyrate) is receiving increasing attention for use as biomimetic copolymers for cell growth. As of yet, these copolymers cannot be used efficiently because of the lack of good mechanical properties. Here, we address this challenge, preparing a composite-scaffold of grafted poly(3-hydroxybutyrate) polyurethane for the first time. However, it is unclear if the composite structure and morphology can also offer a biological application. We obtained the polyurethane by mixing a polyester hydroxylated resin with polyisocyanate and the modified polyhydroxyalkanoates. The results show that the poly(3-hydroxybutyrate) grafted with poly(vinyl alcohol) can be successfully used as a chain extender to form a chemically-crosslinked thermosetting polymer. Furthermore, we show a proposal for the mechanism of the polyurethane synthesis, the analysis of its morphology and the ability of the scaffolds for growing mammalian cells. We demonstrated that astrocytes isolated from mouse cerebellum, and HEK293 can be cultured in the prepared material, and express efficiently fluorescent proteins by adenoviral transduction. We also tested the metabolism of Ca(2+) to obtain evidence of the biological activity.
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Affiliation(s)
- Adriana Pétriz Reyes
- Laboratorio de Neurobiología Molecular y Celular, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Querétaro 76230, México
| | - Ataúlfo Martínez Torres
- Laboratorio de Neurobiología Molecular y Celular, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Querétaro 76230, México
| | | | | | - Susana Vargas Muñoz
- Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México, Querétaro 76230, México
| | | | - Maykel González Torres
- Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, México D.F, 04510, México
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Quintanilla F, Rodríguez J, Vargas S, Solís SG, Olayo R, Hnatchuk N, Brostow W, Chen I, González M. Membranes of chitosan grafted onto poly(3-hydroxybutyrate): new insights into their applicability as scaffolds. ACTA ACUST UNITED AC 2016. [DOI: 10.1080/14328917.2015.1109198] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- F. Quintanilla
- Department of pharmaco chemical, University of the Valley of Mexico (UVM), Boulevard Villas del Mesón 1000, Juriquilla, Santiago de Querétaro, Querétaro 76320, Mexico
| | - J.R. Rodríguez
- Department of Molecular Engineering of Materials, Center of Applied Physics and Advanced Technology, National Autonomous University of Mexico (CFATA-UNAM), Boulevard Juriquilla 3001, Santiago de Querétaro, Querétaro 76320, Mexico
| | - S. Vargas
- Department of Molecular Engineering of Materials, Center of Applied Physics and Advanced Technology, National Autonomous University of Mexico (CFATA-UNAM), Boulevard Juriquilla 3001, Santiago de Querétaro, Querétaro 76320, Mexico
| | - S. G. Solís
- Department of analytical chemistry, Research Center for Applied Chemistry (CIQA), Blvd. Enrique Reyna Hermosillo # 140 Col, San José de los Cerritos Saltillo Coahuila 25294, Mexico
| | - R. Olayo
- Department of Physics, Autonomous Metropolitan University (UAM), Av. San Rafael Atlixco N° 186, Col. Vicentina, Del. Iztapalapa, México, DF 09340, Mexico
| | - N. Hnatchuk
- Laboratory of Advanced Polymers & Optimized Materials (LAPOM), Department of Materials Science and Engineering and Department of Physics, University of North Texas, 3940 North Elm Street, Denton, TX 76207, USA
| | - W. Brostow
- Laboratory of Advanced Polymers & Optimized Materials (LAPOM), Department of Materials Science and Engineering and Department of Physics, University of North Texas, 3940 North Elm Street, Denton, TX 76207, USA
| | - Ikang Chen
- Laboratory of Advanced Polymers & Optimized Materials (LAPOM), Department of Materials Science and Engineering and Department of Physics, University of North Texas, 3940 North Elm Street, Denton, TX 76207, USA
| | - M. González
- Department of Molecular Engineering of Materials, Center of Applied Physics and Advanced Technology, National Autonomous University of Mexico (CFATA-UNAM), Boulevard Juriquilla 3001, Santiago de Querétaro, Querétaro 76320, Mexico
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Radiation-induced graft polymerization of chitosan onto poly(3-hydroxybutyrate). Carbohydr Polym 2015; 133:482-92. [DOI: 10.1016/j.carbpol.2015.07.032] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 06/27/2015] [Accepted: 07/08/2015] [Indexed: 01/27/2023]
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15
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Torres MG, Talavera JRR, Muñoz SV, Pérez MG, Castro MPC, Cortes JC, Muñoz RAE. Effects of solvents on the radiation grafting reaction of vinyl compounds on poly (3-hydroxybutyrate). Radiat Phys Chem Oxf Engl 1993 2015. [DOI: 10.1016/j.radphyschem.2014.12.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Luk JZ, Cork J, Cooper-White J, Grøndahl L. Use of two-step grafting to fabricate dual-functional films and site-specific functionalized scaffolds. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:1746-54. [PMID: 25598325 DOI: 10.1021/la504629h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Polycaprolactone (PCL) is a widely utilized bioresorbable polymer in tissue engineering applications. However, the absence of intrinsic functional groups in the polymer backbone necessitates the incorporation of functional chemistries to enable the further addition of bioactive molecules to PCL-based surfaces and scaffolds. The current study aimed to incorporate two different functional groups, amine and carboxylate, first on two-dimensional (2D) spin-coated PCL films and, thereafter, throughout all surfaces within three-dimensional (3D) porous PCL-based scaffolds, produced using the thermally induced phase separation (TIPS) method, but in a spatially separated manner. Specifically, gamma irradiation induced grafting of acrylic acid (AA) and 2-aminoethyl methacrylate hydrochloride (AEMA) onto PCL was performed in selected solvents and the resulting substrates were characterized using X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), and contact angle measurements to determine the surface free energy. Results demonstrated that stepwise graft copolymerization of AEMA and AA allows the fabrication of dual-functional surfaces, with chemistry depending on the order of grafting of the two monomers. In addition, 3D scaffolds could be decorated exclusively with carboxylate groups in the interior, while the outer surface displayed dual-functionality. This simple surface modification methodology, with the ability to create spatially separated surface functional groups throughout 3D porous scaffolds post their fabrication, has the potential to be applied to many current and future scaffold systems being investigated in the field of tissue engineering.
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Affiliation(s)
- Jing Zhong Luk
- School of Chemistry and Molecular Biosciences, ‡The Australian Institute for Bioengineering and Nanotechnology, and §School of Chemical Engineering, University of Queensland , Brisbane, Queensland 4072, Australia
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Luk JZ, Cooper-White J, Rintoul L, Taran E, Grøndahl L. Functionalised polycaprolactone films and 3D scaffolds via gamma irradiation-induced grafting. J Mater Chem B 2013; 1:4171-4181. [DOI: 10.1039/c3tb20267d] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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