Abstract
Composite matrices of poly(ε-caprolactone)-grafted acrylic acid (PCL-g-AA) and hydroxyapatite (HA) were prepared via electrospinning of oil-in-water emulsions. Grafting of varying amounts of AA on PCL was carried out in a twin-screw compounder using benzoyl peroxide as an initiator under inert atmosphere. A solution of PCL-g-AA in toluene, containing HA, comprised the oil phase of the emulsion, while the aqueous phase contained poly(vinyl alcohol) (PVA) as a template polymer. No emulsifier was used in making such emulsions which were found to be stable for more than a month at room temperature. Secondary interactions of AA group of PCL-g-AA with HA and PVA at the oil–water interface provided stability to the emulsion. Uniform composite fibrous matrices were produced from the resultant emulsions under controlled electrospinning conditions. The composite matrices, thus developed using minimal organic solvent, are free from emulsifiers and have high potential to be used in applications including tissue engineering.
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Acknowledgements
The authors gratefully acknowledge the financial support provided by The Swedish Foundation for International Cooperation in Research and Higher Education (STINT), Sweden (Grant No. IB2014-5638), and Department of Science and Technology (DST), India (Grant No. SR/S3/CE/050/2011) to perform this research. The authors also acknowledge the kind support provided by Ms. Haike Hilke in helping JP to conduct micro-compounding experiments.
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Pal, J., Skrifvars, M., Nandan, B. et al. Electrospun composite matrices from tenside-free poly(ε-caprolactone)-grafted acrylic acid/hydroxyapatite oil-in-water emulsions. J Mater Sci 52, 2254–2262 (2017). https://doi.org/10.1007/s10853-016-0518-z
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DOI: https://doi.org/10.1007/s10853-016-0518-z