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Development of perforated microthin poly(epsilon-caprolactone) films as matrices for membrane tissue engineering
A S Htay1, S H Teoh, D W Hutmacher
1Mechanical Engineering Department, Division of Bioengineering, National University of Singapore, Singapore.
Journal of Biomaterials Science. Polymer Edition
|July 22, 2004
Summary
Researchers created perforated poly(epsilon-caprolactone) (PCL) films to enhance tissue engineering matrices. These modified PCL membranes show increased moisture permeability and faster degradation, crucial for biomedical applications.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Tissue Engineering
Background:
- Bioresorbable polymers like poly(epsilon-caprolactone) (PCL) are vital for tissue engineering matrices.
- Controlling moisture permeability and understanding degradation are key challenges for PCL thin films.
Purpose of the Study:
- To design and fabricate perforated microthin PCL membranes.
- To enhance moisture permeability and investigate hydrolytic degradation characteristics.
Main Methods:
- PCL films were biaxially stretched and perforated with a uniform array of holes.
- Water vapor transmission rate was measured.
- Accelerated hydrolytic degradation was induced using 5 M NaOH.
- Degraded samples were analyzed for weight, morphology, mechanical properties, crystallinity, and molecular weight.
Main Results:
- Perforation increased water vapor transmission rate by 50% to 47.6 g/h/m².
- Hydrolytic degradation initiated with surface chain scission and erosion.
- Perforated films exhibited faster degradation than unperforated films.
- Surface erosion led to micropore formation, microcracks, and increased roughness.
Conclusions:
- Perforated microthin PCL membranes offer improved moisture permeability for tissue engineering.
- The degradation mechanism involves surface erosion, accelerated by perforation.
- These findings are significant for developing advanced bioresorbable materials.