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Optimization of reaction parameters for synthesis of Cyclodextrin nanosponges in controlled nanoscopic size dimensions

  • Anandam SingireddyEmail author
  • Sobhita Rani Pedireddi
  • Selvamuthukumar Subramanian
ORIGINAL PAPER
  • 26 Downloads

Abstract

Cyclodextrin nanosponges are hyper-cross-linked polymers obtained by reaction of hydroxyl groups present on cyclodextrins with an appropriate polyfunctional cross-linker to form solid particles with a rather spherical morphology. Convective heating method has been the most successful and popular approach since the synthesis of nanosponges was first reported. However, problems of low yields, and batch to batch variations have not been addressed. These variations are largely due to differences in experimental conditions such as reaction temperature in °C (A), reaction time in min (B) and stirring speed in rpm (C). The reaction conditions for the synthesis of nanosponges were optimized by using central composite design and response surface methodology. The optimization model predicted a yield of 88.0484% and particle size of about 265.446 nm with A, B and C levels of 105.92, 306.92 and 5000 respectively. The observed responses were in close agreement with the predicted values. The formation of nanosponges was confirmed by FTIR spectroscopy. The nanosponges prepared under optimized conditions exhibited homogeneous size distribution and spherical morphology, which was confirmed by Transmission electron microscopy. The thermal stability determined by DSC is very similar to the previous results.

Keywords

Nanosponges Optimization Central composite design Response surface methodology 

Notes

Acknowledgements

We would like to thank Prof. K. Venu Gopal Reddy (Director, Central Facilities for Research and Development, Osmania University, Hyderabad) for assistance with FTIR analysis and Mr. Rajender (Centre for Nano Science & Technology, Jawaharlal Nehru Technological University, Hyderabad) for technical support with the XRD and TEM. We are very much grateful to UGC-SAP-DRS–PHASE I, New Delhi, India for providing facilities to carry out this work.

Author’s contributions

All the authors contributed equally to the preparation of manuscript.

Compliance with ethical standards

Competing interests

We both the authors declare that we do not have any competing interests.

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Copyright information

© The Polymer Society, Taipei 2019

Authors and Affiliations

  • Anandam Singireddy
    • 1
    Email author
  • Sobhita Rani Pedireddi
    • 1
  • Selvamuthukumar Subramanian
    • 2
  1. 1.Vijaya college of PharmacyHyderabadIndia
  2. 2.Department of Pharmacy, Faculty of Engineering and TechnologyAnnamalai UniversityAnnamalai NagarIndia

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