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Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...
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Synthesis of Strong Adhesive Hydrogel, Gelatin O-Nitrosobenzaldehyde
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Development of a biodegradable bioadhesive containing urethane groups.

P Ferreira1, António F M Silva, M I Pinto

  • 1Departamento de Engenharia Química, Universidade de Coimbra, Polo II, Pinhal de Marrocos, Coimbra 3030-290, Portugal. paula_calvinho@yahoo.com

Journal of Materials Science. Materials in Medicine
|June 26, 2007
PubMed
Summary

This study developed a biodegradable urethane pre-polymer surgical adhesive. This new adhesive offers an alternative to sutures, potentially improving surgical efficiency and sealing capabilities.

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Area of Science:

  • Biomaterials Science
  • Polymer Chemistry
  • Surgical Innovation

Background:

  • Surgical adhesives offer an alternative to traditional suturing and stapling.
  • Adhesives can provide hemostasis and seal air leakages, reducing procedure time.
  • Biodegradable materials are desirable for medical applications to minimize long-term complications.

Purpose of the Study:

  • To develop a biodegradable urethane pre-polymer for tissue adhesion.
  • To create a surgical adhesive capable of reacting with biological molecules.
  • To evaluate the properties and biocompatibility of the synthesized urethane-based adhesives.

Main Methods:

  • Synthesis of urethane pre-polymers using polycaprolactone diol (PCL) with isophorone diisocyanate (IPD) or hexamethylene diisocyanate (HDI).
  • Characterization using Attenuated Total Reflectance-Fourier Transform Infrared (ATR-FTIR) spectroscopy.
  • Assessment of swelling capacity, NCO group stability under humidity, reaction with aminated substrates, and surface energy via contact angle measurements.
  • Evaluation of hemocompatibility through thrombosis and hemolysis tests.

Main Results:

  • Successfully synthesized biodegradable urethane pre-polymers.
  • Characterization confirmed material properties and reactivity with amino groups.
  • Surface energy and swelling capacity were determined.
  • Initial hemocompatibility tests indicated suitability for surgical applications.

Conclusions:

  • The developed biodegradable urethane pre-polymers show promise as surgical adhesives.
  • These materials offer a potentially faster and easier method for tissue adhesion compared to conventional techniques.
  • Further research is warranted to optimize the formulation for clinical use.