Biodegradation of polyurethane derived from castor oil

Abstract

The aim of this research was to study the biodegradation of a polymer derived from castor oil, which is a renewable, natural material that is a practical alternative for the replacement of traditional polyurethane foams. Due to its molecular structure, which contains polyester segments derived from vegetable oil, the polymeric surface is susceptible to microorganism attack. This study tested the biological degrading agent that was in contact with the microorganisms resulting from microbiological grease degrading agents, when foam was inoculated. Solid-media agar-plate tests were conducted for their potential to evaluate the biodegradation of polymeric particles by specific strains of microorganisms during 216 hours. The growth rate was defined. This technique provides a way of distinguishing the degradation abilities of microorganisms from the degradability of materials

Síntesis y caracterización de adhesivos reposicionables de poliuretano dispersos en agua, obtenidos a partir de aceite de castor maleinizado

“…El uso de materias primas renovables como es el aceite de castor, permite obtener un producto competitivo con los petroquímicos a nivel comercial, de durabilidad y con minimización del impacto ambiental al ser dispersados en agua y biodegradables [7][8][9] .…”

Vegetable-origin foam employed in dye extraction in tanning and leather processing facilities

“…The present study utilized polyester-type polyurethane formulated from castor oil, synthesized by the Analytic Chemistry and Technology Polymers Group of the University of São Paulo at São Carlos, whose structure possesses molecules derived from a vegetable oil that make it susceptible to microorganism attack, and thus can be considered to be a polymer with biodegradable characteristics [15] . It is synthesized from the reaction of polyols with TDI diisocyanates(toluene diisocyanate) and MDI (4,4 diphenylmethane diisocyanate).…”

Synthesis and Optimization of Colloidal Hydroxyapatite Nanoparticles by Hydrothermal Processes

“…6 Synthetic HA nanoparticles exhibit good biocompatibility, bioactivity and osteoinducibility. [1][2][3][6][7][8] Due to its unique quantum confining effects and the reactivity of the surface area, nanocrystalline HA exhibits better bioactivity, biocompatibility and improved mechanical properties than microcrystalline and bulk HA. 9 HA is the major mineral component of bone and teeth structures, corresponding to about 30-70% of the mass of bones and teeth.…”

“…3 Synthetic HA has been extensively studied and used as it presents biocompatibility with bone minerals and does not present distinct phases of other calcium phosphates (Ca-P) when carefully synthesized. 7,8 However, implants made with pure HA exhibit low tensile strength, impact and fatigue resistance. 10,11 Recent research focuses on overcoming limitations of calcium phosphates and HA ceramics such as low bioresorbability, low surface area and low bioreactivity, and the improvement of their biological properties.…”