Properties of poly(ethylene glycol)-grafted poly(lactic acid) plasticized with poly(ethylene glycol)

Choi, Kyung-Man; Lim, Sung-Wook; Choi, Myeon‐Cheon; Han, Dong-Hun; Ha, Chang‐Sik

doi:10.1007/s13233-014-2182-y

Cited by 26 publications

(5 citation statements)

References 36 publications

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“…The addition of EPE triblock copolymer caused a decrease in the Young’s modulus if compared with neat CTA, attributed to the plasticizing effect of EPE triblock copolymer. , In addition, the TiO 2 -EPE/CTA nanocomposites displayed a higher Young’s modulus than the EPE/CTA blend. At low sol–gel content, the Young’s modulus increased with the increase of sol–gel content.…”

Section: Resultsmentioning

confidence: 99%

Transparent and Flexible Cellulose Triacetate–TiO₂ Nanoparticles with Conductive and UV-Shielding Properties

Gomez-Hermoso-de-Mendoza

Gutierrez

Tercjak

2020

J. Phys. Chem. C

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Cellulose triacetate (CTA) and sol−gel synthesized TiO 2 nanoparticles were used to develop and characterize novel nanocomposites modified also with poly(ethylene oxide-bpropylene oxide-b-ethylene oxide) (EPE) triblock copolymer. The designed nanocomposites presented UV-shielding properties, being the protection higher at high sol−gel content, with suitable surface finish and high transparency even with 20 vol % sol−gel content. The DSC results showed a decrease of the T g and T m of the CTA phase, indicating a partial miscibility between the nanocomposite components. The AFM measurement indicated that the addition of EPE triblock copolymer led to the nanostructuration of the CTA matrix, allowing to control the dispersion of the TiO 2 nanoparticles since the PEO block acted as surfactant for the TiO 2 nanoparticles preventing their aggregation. The EFM measurement proved that the TiO 2 nanoparticles embedded in the CTA or the PEO block/CTA matrix maintained their conductive properties. Moreover, the TiO 2 nanoparticles acted as reinforcement improving the Young's modulus of nanocomposites. The designed nanocomposites presented interesting properties and surface appearance to design a wide variety of products.

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Section: Resultsmentioning

confidence: 99%

Transparent and Flexible Cellulose Triacetate–TiO₂ Nanoparticles with Conductive and UV-Shielding Properties

Gomez-Hermoso-de-Mendoza

Gutierrez

Tercjak

2020

J. Phys. Chem. C

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“…The results show that the width at half of the maximum peaks (B) increased with co-monomer content. The Scherrer equation was used to calculate mean crystal sizes of the “hkl” plane (L hkl ) 39 : in which K and λ are the Scherrer factor (0.9) and peak position, respectively. The results (Table 2 ) confirmed that the crystallite sizes decreased with increasing BGl content, indicating that the structurally different co-monomer hindered crystallization.…”

Section: Resultsmentioning

confidence: 99%

GBR membrane of novel poly (butylene succinate-co-glycolate) co-polyester co-polymer for periodontal application

Pajoumshariati

Shirali

Yavari

et al. 2018

Sci Rep

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In periodontics, osteoconductive biodegradable guided bone regeneration (GBR) membranes with acceptable physico-mechanical properties are required to fix alveolar bone defects. The objectives of the present study were to produce and characterize a novel co-polyester—poly (butylene succinate-co-glycolate) (PBSGL), and fabricate a PBSGL membrane by electrospinning. We then aimed to evaluate the in vitro effect of the glycolate ratio on the biocompatibility and osteogenic differentiation of mesenchymal stem cells (MSCs), and evaluate in vivo bone regeneration using these membranes in rabbit calvarial defects by histology. Increasing the glycolate ratio of electrospun PBSGL membranes resulted in better cell attachment, greater cell metabolic activity, and enhanced osteogenic potential at both transcriptional and translational levels. Histologic and histomorphometric evaluations revealed further that bone defects covered with fibers of higher glycolate ratios showed more bone formation, with no adverse inflammatory response. These results suggest that novel PBSGL electrospun nanofibers show great promise as GBR membranes for bone regeneration.

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“…PearsonVII equation was used to deconvolute diffraction peaks and calculating the full width at half maximum of peaks (B) which show that it increase with nHA content. The Scherrer equation was used to calculate the mean crystal sizes of (hkl) plane ( L hkl ):

L_{hkl} = \frac{K λ}{B \cos (θ)}

where K and θ are the Scherrer factor (0.9) and peak position, respectively. The results are shown in Table .…”

Section: Resultsmentioning

confidence: 99%

Fabrication of in situ polymerized poly(butylene succinate‐co‐ethylene terephthalate)/hydroxyapatite nanocomposite to fibrous scaffolds for enhancement of osteogenesis

Shirali

Rafizadeh

Taromi

et al. 2017

J Biomedical Materials Res

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A combination of elastic poly(butylene succinate-co-ethylene terephthalate) and rigid nano-hydroxyapatite were used to prepare an in-situ synthesized nanocomposite mimicing bone structure. The microstructure, morphology, and dispersion of nanoparticles in the nanocomposites were studied using proton nuclear magnetic resonance ( HNMR), scanning electron microscope (SEM), and transmission electron microscopy (TEM), respectively. Then, electrospinning method was used to produce nanofiber matrix with lowest fiber diameter. Presence of chemical bonds among nanoparticles and polymer leads to the excellent particle dispersion and solution phase stability. SEM results show that continuous and bead-free nanofibers were produced and incorporating nanoparticle slightly increased fibers diameter. Elastic modulus, tensile strength, crystallinity, hydrophilicity and hydrolytic degradability of resulted nanofiber increased with nanoparticle but elongation at break slightly decreased. Proliferation and osteogenic differentiation of human mesenchymal stem cell significantly improved by introducing nanoparticle which indicate that electrospun nanofibers could be used as scaffolds for bone tissue engineering. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 105A: 2622-2631, 2017.

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Properties of poly(ethylene glycol)-grafted poly(lactic acid) plasticized with poly(ethylene glycol)

Cited by 26 publications

References 36 publications

Transparent and Flexible Cellulose Triacetate–TiO₂ Nanoparticles with Conductive and UV-Shielding Properties

Transparent and Flexible Cellulose Triacetate–TiO₂ Nanoparticles with Conductive and UV-Shielding Properties

GBR membrane of novel poly (butylene succinate-co-glycolate) co-polyester co-polymer for periodontal application

Fabrication of in situ polymerized poly(butylene succinate‐co‐ethylene terephthalate)/hydroxyapatite nanocomposite to fibrous scaffolds for enhancement of osteogenesis

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Properties of poly(ethylene glycol)-grafted poly(lactic acid) plasticized with poly(ethylene glycol)

Cited by 26 publications

References 36 publications

Transparent and Flexible Cellulose Triacetate–TiO2 Nanoparticles with Conductive and UV-Shielding Properties

Transparent and Flexible Cellulose Triacetate–TiO2 Nanoparticles with Conductive and UV-Shielding Properties

GBR membrane of novel poly (butylene succinate-co-glycolate) co-polyester co-polymer for periodontal application

Fabrication of in situ polymerized poly(butylene succinate‐co‐ethylene terephthalate)/hydroxyapatite nanocomposite to fibrous scaffolds for enhancement of osteogenesis

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Product

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Transparent and Flexible Cellulose Triacetate–TiO₂ Nanoparticles with Conductive and UV-Shielding Properties

Transparent and Flexible Cellulose Triacetate–TiO₂ Nanoparticles with Conductive and UV-Shielding Properties