Ultraviolet light crosslinking of poly(trimethylene carbonate) for elastomeric tissue engineering scaffolds

Bat, Erhan
Higuera, Gustavo A.
van Blitterswijk, Clemens A.
Feijen, Jan
Grijpma, Dirk W.
A practical method of photocrosslinking high molecular weight poly(trimethylene carbonate)(PTMC) is presented. Flexible, elastomeric and biodegradable networks could be readily prepared by UV irradiating PTMC films containing pentaerythritol triacrylate (PETA) and a photoinitiator. The network characteristics, mechanical properties, wettability, and in vitro enzymatic erosion of the photocrosslinked PTMC films were investigated. Densely crosslinked networks with gel contents up to 98% could be obtained in this manner. Upon photocrosslinking, flexible and tough networks with excellent elastomeric properties were obtained. To illustrate the ease with which the properties of the networks can be tailored, blends of PTMC with mPEG-PTMC or with PTMC-PCL-PTMC were also photocrosslinked. The wettability and the enzymatic erosion rate of the networks could be tuned by blending with block copolymers. Tissue engineering scaffolds were also fabricated using these flexible photocrosslinkable materials. After crosslinking, the fabricated PTMC-based scaffolds showed inter-connected pores and extensive micro-porosity. Human mesenchymal stem cell (hMSC) culturing studies showed that the photocrosslinked scaffolds prepared from PTMC and PTMC/PTMC-PCL-PTMC blends are well-suited for tissue engineering applications.


Thermal characterization of composites of polyamide-6 and polypropylene involving boron compounds via direct pyrolysis mass spectrometry
İşbaşar Afacan, Güllü Ceyda; Hacaloğlu, Jale; Yılmazer, Ülkü; Department of Polymer Science and Technology (2013)
In this work, the effects of addition of boron compounds, boron phosphate (BPO4), zinc borate (ZnB), borosilicate (BSi) and lanthanum borate (LaB), on thermal degradation characteristics of composites of polyamide 6 (PA6) and polypropylene (PP) are analyzed via Direct Pyrolysis Mass Spectrometry (DP-MS) technique. The composites of PA6 involve nitrogen containing flame retardants, melamine (Me) or melamine cyanurate (MC); or phosphorus containing flame retardant, aluminum diethylphosphinate (AlPi), with or ...
3D porous bioceramic based boron-doped hydroxyapatite/baghdadite composite scaffolds for bone tissue engineering
Jodati, Hossein; Evis, Zafer; Tezcaner, Ayşen; Alshemary, Ammar Z.; Motameni, Ali (2023-04-01)
Making composite scaffolds is one of the well-known methods to improve the properties of scaffolds used in bone tissue engineering. In this study, novel ceramic-based 3D porous composite scaffolds were successfully prepared using boron-doped hydroxyapatite, as the primary component, and baghdadite, as the secondary component. The effects of making composites on the properties of boron-doped hydroxyapatite-based scaffolds were investigated in terms of physicochemical, mechanical, and biological properties. T...
Thermal degradation of Polylactide/Poly(ethylene glycol) fibers and composite fibers involving organoclay
Ozdemir, Esra; Hacaloğlu, Jale (2018-01-01)
In this study, electrospun fibers of melt blended poly(lactic acid) and poly(ethylene glycol), (PLA)-PEG blends involving 10, 15 and 20 wt% PEG and their corresponding composites with organically modified montmorillonite, Cloisite 30B were prepared and characterized by x-ray diffraction, differential scanning calorimetry, thermogravimetry and direct pyrolysis mass spectrometry techniques. The narrower fiber diameters observed for the PLA-PEG fibers involving organoclay compared to the corresponding neat fib...
Light-Induced Paramagnetism in Colloidal Ag+-Doped CdSe Nanoplatelets
Najafi, Arman; Sharma, Manoj; Delikanli, Savas; Bhattacharya, Arinjoy; Murphy, Joseph R.; Pientka, James; Sharma, Ashma; Quinn, Alexander P.; Erdem, Onur; Kattel, Subash; Keleştemur, Yusuf; Kovalenko, Maksym; Rice, William D.; Demir, Hilmi Volkan; Petrou, Athos (2021-03-01)
We describe a study of the magneto-optical properties of Ag+-doped CdSe colloidal nanoplatelets (NPLs) that were grown using a novel doping technique. In this work, we used magnetic circularly polarized luminescence and magnetic circular dichroism spectroscopy to study light-induced magnetism for the first time in 2D solution-processed structures doped with nominally nonmagnetic Ag+ impurities. The excitonic circular polarization (P-X) and the exciton Zeeman splitting (Delta E-Z) were recorded as a function...
Semi-empirical SCF-MO calculations for the structural and electronic properties of single-wall InP nanotubes
Erkoç, Şakir (Elsevier BV, 2004-05-14)
The structural and electronic properties of armchair and zigzag models of single-wall InP nanotubes have been investigated qualitatively by performing semi-empirical self-consistent-field molecular orbital calculations at the level of PM3 method within the RHF formulation. It has been found that these structures are stable and they may be used as conducting nanowires in nanodevice and optoelectronic applications.
Citation Formats
E. Bat, G. A. Higuera, C. A. van Blitterswijk, J. Feijen, and D. W. Grijpma, “Ultraviolet light crosslinking of poly(trimethylene carbonate) for elastomeric tissue engineering scaffolds,” BIOMATERIALS, pp. 8696–8705, 2010, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/46889.