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Fabricating Superhydrophobic Polymeric Materials for Biomedical Applications
Published on: August 28, 2015
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Bionic design for surface optimization combining hydrophilic and negative charged biological macromolecules.
Fen Ran1, Haiming Song1, Xiaoqin Niu2
1School of Material Science and Engineering, State Key Laboratory of Gansu Advanced Non-Ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, People's Republic of China.
International Journal of Biological Macromolecules
|April 1, 2014
Summary
This study developed a modified polyethersulfone (PES) membrane with enhanced blood compatibility. The bionic design, mimicking heparin, significantly improved hemocompatibility for blood purification applications.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Surface Engineering
Background:
- Polyethersulfone (PES) membranes are suitable for blood purification but require improved hemocompatibility for advanced applications.
- Existing PES membranes face limitations in blood compatibility due to surface interactions with blood components.
- Emerging applications necessitate enhanced biocompatibility beyond current standards.
Purpose of the Study:
- To develop a modified PES membrane with superior blood compatibility using a bionic design.
- To create a hydrophilic and negatively charged surface on PES membranes.
- To investigate the impact of surface modification on hemocompatibility.
Main Methods:
- Synthesized hydrophilic and ionic charged macromolecules: sulfonated poly(styrene)-b-poly(methyl methacrylate)-b-poly-(styrene) (PSSMSS) and poly(vinyl pyrrolidone)-b-poly(methyl methacrylate)-b-poly-(vinyl pyrrolidone) via reversible addition-fragmentation chain transfer polymerization.
- Modified PES membranes using a blending method with the synthesized macromolecules.
- Evaluated membrane properties, including surface characteristics and blood compatibility (platelet adhesion, clotting time).
Main Results:
- Achieved a hydrophilic membrane surface with a negative charge, mimicking heparin's structure.
- Demonstrated significantly suppressed platelet adhesion on the modified PES membranes.
- Observed a prolonged blood clotting time, indicating improved hemocompatibility.
- Found that increased PSSMSS content correlated with longer clotting times, highlighting the importance of both hydrophilic and negative charges.
Conclusions:
- The bionic design effectively enhanced the blood compatibility of PES membranes.
- The combination of hydrophilic and negative charges on the membrane surface is crucial for improved hemocompatibility.
- The modified PES membranes show significant potential for advanced blood purification applications.
