Tuning of renewable sponge‐like polyurethane physical‐chemical and morphological properties using the pullulan as a reactive filler

This study aimed to evaluate the effect of pullulan (Pull) on a renewable polyurethane sponge‐like scaffold synthesized from the Pull mixture with the castor oil‐based polyol and the prepolymer using the situ foaming method. The Pull contents on the sponge‐like are 5, 10, and 20 wt.%. The samples we...

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Bibliographic Details
Published in:Journal of applied polymer science 2023-03, Vol.140 (11), p.n/a
Main Authors: Maia, Lana S., Bomfim, Anne Shayene C., Oliveira, Daniel M., Pinhati, Fernanda R., Conceição, Monique O. T., Barud, Hernane S., Medeiros, Simone A., Rosa, Derval S., Mulinari, Daniella R.
Format: Article
Language:English
Subjects:
Biomedical materials
Bonding strength
Castor oil
castor polyol‐based polyurethane
Compressive strength
Contact angle
Density
Fourier transforms
Hydrophobicity
Infrared analysis
Infrared spectroscopy
Materials science
Mechanical properties
Microscopy
Optical microscopy
Polymers
Polyurethane foam
Polyurethane resins
Prepolymers
Pullulan
reactive filler
Reagents
renewable scaffold
Scaffolds
sponge‐like
Thermal stability
Thermogravimetry
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Summary:This study aimed to evaluate the effect of pullulan (Pull) on a renewable polyurethane sponge‐like scaffold synthesized from the Pull mixture with the castor oil‐based polyol and the prepolymer using the situ foaming method. The Pull contents on the sponge‐like are 5, 10, and 20 wt.%. The samples were evaluated by optical microscopy (OM), scanning electron microscopy (SEM), density, Fourier transform infrared spectroscopy (FTIR), contact angle, Thermogravimetry, X‐ray diffraction analysis (XRD), and compression strength test, respectively. FTIR results indicated that Pull was hydrogen‐bonded to PU foam chains and increased the sponge‐like scaffolds density, inducing a decrease in average cell size compared to the pristine PU, confirming that they act as nucleating agents. The Pull addition improved PU foams' hydrophobicity and mechanical properties and caused a thermal stability median between Pull and pristine PU. Thus, all renewable sponge‐like scaffolds were hydrophobics and presented appropriate mechanical behavior, exhibiting better physicochemical properties, and appearing as promising candidates for biomedical applications.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.53619