Systematic analysis about residual chloroform removal from PCL films

Michael Teske 1 , Daniela Arbeiter 1 , Konstanze Schober 1 , Thomas Eickner 1  and Niels Grabow 1
  • 1 Institute for Biomedical Engineering, University Medical Center Rostock,, Rostock, Germany


For fabrication of polymeric implants and drug carriers volatile organic solvents, such as chloroform, are widely used. In order to remove solvents for patient safety several processes have to be carried out to avoid changes in the thermal characteristics of the polymers, as well as in the drug release profile and mechanical properties. We analyzed films of the polymer poly(ε−caprolactone) (PCL), a common commercial medical grade polymer which is widely used in implants and drug carriers. Considering the influence on the morphology and thermal properties we screened different post treatment processes. Acceptable chloroform contents according to recommendations of the International Council for Harmonisation of Technical Requirements for Pharmaceuticals for Human Use (ICH) without changes in morphology and crystallinity were achieved via a simple annealing process for 24 h at 40°C and 40 mbar.

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Current Directions in Biomedical Engineering is an open access journal and closely related to the journal Biomedical Engineering - Biomedizinische Technik. CDBME is a forum for the exchange of knowledge in the fields of biomedical engineering, medical information technology and biotechnology/bioengineering for medicine and addresses engineers, natural scientists, and clinicians working in research, industry, or clinical practice.