Journal
JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
Volume 39, Issue -, Pages 277-282Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jddst.2017.04.010
Keywords
Polyurethane-urea; Diamines; Elastomer; Crosslinked; Drug release; pH-responsive; Sustained release; Stimuli-responsive
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Funding
- Clinical Research Center of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang
- Higher education commission (HEC) Pakistan
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A novel diamine 4-(4-aminophenoxy)butyl-4-aminophenyl ether (ABAE) was synthesized as a chain extender (CE) by a quick and facile method using microwave reactor. CE was used for the preparation of stimuli-responsive Polyurethane-urea elastomer (PUU) with the ratio of NCO/OH from 2 to 2.5. Synthesized PUU was characterized with the help of Fourier transform infrared spectroscopy (FTIR), derivative thermogravimetric analysis (DTG), and scanning electron microscopy SEM. PUU films were loaded with an anti-cancer drug doxorubicin. Drug release kinetics were studied in different solvents, at different pH values and with different NCO contents of PUU. The maximum of 45% cumulative drug release was observed in DMSO while the drug release increased with the decrease in pH and a maximum cumulative release of 47% was observed at acidic pH of 4.4. The minimum drug was released from the one, which was crosslinked with highest ratio (2.5) of NCO/OH. So, we can say that drug release can easily be adjusted under different conditions and environments with the help of these stimuli-responsive media. (C) 2017 Elsevier B.V. All rights reserved.
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