Synthesis and investigation of thermal and mechanical properties of in situ prepared biocompatible Fe3O4/polyurethane elastomer nanocomposites

Mohammadi, Abbas; Barikani, Mehdi; Barmar, Mohammad

doi:10.1007/s00289-014-1268-1

Cited by 42 publications

(17 citation statements)

References 36 publications

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“…Similar assessments of polyurethane based-materials have been presented earlier [58,59]. Besides, the available publications [59,60] report that the band at 1702 cm −1 is assigned to the hydrogen-bonded C=O (hydrogen bonding between C=O and N-H) of urethane linkage, while the peak at about 1720 cm −1 is related to free C=O group.…”

Section: Resultssupporting

confidence: 75%

Application of FTIR Method for the Assessment of Immobilization of Active Substances in the Matrix of Biomedical Materials

2019

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Background: The purpose of the study was to demonstrate the usefulness of the Fourier transform infrared spectroscopy (FTIR) method for the evaluation of the modification process of biomaterials with the participation of active substances. Methods: Modified catheter samples were prepared by activating the matrix with an acid, iodine, or bromine, and then immobilizing the active molecules. To carry out the modification process, the Fourier transform infrared-attenuated total reflectance (FTIR-ATR) method was used. Results: FTIR analysis indicated the presence of the immobilized substances in the catheter matrix and site-specific reactions. Conclusion: We surmise that the infrared spectroscopic technique is an ideal tool for the assessment of the drug immobilization and the changes occurring in the course of the modification process.

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Section: Resultssupporting

confidence: 75%

Application of FTIR Method for the Assessment of Immobilization of Active Substances in the Matrix of Biomedical Materials

2019

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“…C-O-C asymmetric and symmetric stretching vibrations of PCL were observed at and 1158cm -1 , respectively. The absorption bands at 1098 and 1043 cm -1 were also assigned to asymmetrical and symmetrical C-O-C stretching vibration of urethane groups[33,34]. All of these IR spectra confirm the formation of a polyurethane structure.…”

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confidence: 63%

Biocompatible polyurethane/thiacalix[4]arenes functionalized Fe3O4 magnetic nanocomposites: Synthesis and properties

Mohammadi

Barikani

Lakouraj

2016

Materials Science and Engineering: C

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In this study, a series of magnetic polyurethane/Fe3O4 elastomer nanocomposites were prepared by covalently embedding novel thiacalix[4]arenes (TC4As) functionalized Fe3O4 nanoparticles (TC4As-Fe3O4) which contain macrocycles with reactive hydroxyl groups. Surface functionalization of Fe3O4 nanoparticles with TC4As macrocycles as unique reactive surface modifier not only gives specific characteristics to Fe3O4 nanoparticles but also improves the interphase interaction between nanoparticles and the polyurethane matrices through covalent attachment of polymer chains to nanoparticle surfaces. The novel synthesized TC4As-Fe3O4 nanoparticles were characterized by FTIR, XRD, TGA, VSM and SEM analysis. Furthermore, the effect of functionalization of Fe3O4 nanoparticles on the various properties of resulting nanocomposites was studied by XRD, TGA, DMTA, SEM, and a universal tensile tester. It was found that the functionalization of nanoparticles with TC4As affords better mechanical and thermal properties to polyurethane nanocomposites in comparison with unmodified nanoparticles. The SEM analysis showed finer dispersion of TC4As-Fe3O4 nanoparticles than unmodified Fe3O4 nanoparticles within the polyurethane matrices, which arising from formation of covalent bonding between TC4As functionalized Fe3O4 nanoparticles and polyurethane matrices. Moreover, the investigation of in vitro biocompatibility of novel nanocomposites showed that these samples are excellent candidate for biomedical use.

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“…The sharp bands seen at 1702 cm −1 and 1730 cm −1 indicate CO stretch group and the peaks at 1220 cm −1 and 1105 cm −1 denote the carbonyl group corresponding to the alcohol group. The other absorption bands observed at 2938 cm −1 and 2853 cm −1 were attributed to the CH stretch group and the peak at 1413 cm −1 indicated its vibration [28,32]. In the absorption band of PU/grapes fibrous membranes, there were no new peaks but the peak intensity was observed to be increased due to hydrogen bond formation as shown in Figure 5(b) [33].…”

Section: Resultsmentioning

confidence: 99%

Fabrication and characterization of electrospun polyurethane blended with dietary grapes for skin tissue engineering

Mani

Jaganathan

2019

Journal of Industrial Textiles

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The tissue-engineered skin has emerged as a plausible alternative approach to the traditional wound dressing owing to its inherent advantages. Further, in tissue engineering applications, fibrous scaffold obtained through textile technologies is widely attractive. The present study focused on the fabrication of electrospun textile polyurethane wound dressing scaffold incorporated with grape extract. The fabricated composites showed smooth as well as reduced fiber (730 ± 127 nm) and pore (873 ± 51 nm) diameter than the control polyurethane (fiber diameter –890 ± 117 and pore diameter –1064 ± 74 nm) as revealed in the scanning electron microscopy. The formation of hydrogen bond in Fourier transform infrared spectroscopy revealed the interaction between the polyurethane and grape. The addition of grape enhanced the wettability behavior (86° ± 2) and the surface roughness (469 nm) of the polyurethane membrane. Thermal gravimetric analysis and mechanical testing revealed the enhancement of thermal and tensile strength with the incorporation of the grape into the polyurethane matrix. The in vitro blood compatibility and cytocompatibility studies revealed enhanced antithrombogenicity behavior and the non-toxic nature to human dermal fibroblast cells for the fabricated composites than the pristine polyurethane. Hence, the addition of grape into the polyurethane matrix had enhanced the physicochemical characteristics and biocompatibility parameters which could promote this candidate as a valid alternative for skin tissue engineering regeneration.

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Synthesis and investigation of thermal and mechanical properties of in situ prepared biocompatible Fe3O4/polyurethane elastomer nanocomposites

Cited by 42 publications

References 36 publications

Application of FTIR Method for the Assessment of Immobilization of Active Substances in the Matrix of Biomedical Materials

Application of FTIR Method for the Assessment of Immobilization of Active Substances in the Matrix of Biomedical Materials

Biocompatible polyurethane/thiacalix[4]arenes functionalized Fe3O4 magnetic nanocomposites: Synthesis and properties

Fabrication and characterization of electrospun polyurethane blended with dietary grapes for skin tissue engineering

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