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Microfilters for biomedicine obtained by swift ion processing
1Dipartimento di Fisica di Messina, Università di Messina, Italy. Torrisi@alpme2.me.infn.it
Bio-Medical Materials and Engineering
|January 1, 1997
Summary
Swift ion irradiation of biopolymeric films creates ion tracks, increasing solubility. Chemical etching of these tracks produces micro-perforated films for advanced microfiltration applications.
Area of Science:
- Materials Science
- Polymer Science
- Nuclear Physics
Background:
- Biopolymeric films are susceptible to radiation damage.
- Ion beam irradiation is a tool for modifying material properties.
Purpose of the Study:
- To investigate the effects of swift ion irradiation on biopolymeric films.
- To develop micro-perforated films for microfiltration applications.
Main Methods:
- Irradiation of hydrogenated and fluorated polymers with 50 MeV Li, C, and O ion beams.
- Analysis of radiation-induced chemical changes and molecular emission.
- Chemical etching to create micro-pores.
Main Results:
- Swift ions induce ionization, excitation, and radical formation, leading to chain scission and cross-linking.
- Radiation damage increases material solubility around ion tracks.
- Micro-perforated films with controllable porosity and sub-micrometric pores were fabricated.
Conclusions:
- Swift ion irradiation followed by etching is an effective method for producing micro-perforated polymer films.
- These films are suitable for specialized ultra- and microfiltration of biological liquids.