Effect of an organotin catalyst on the physicochemical properties and biocompatibility of castor oil-based polyurethane/cellulose composites

Polyurethane/cellulose composites were synthesized from castor-oil-derived polyols and isophorone diisocyanate using dibutyltin dilaurate (DBTDL) as the catalyst. Materials were obtained by adding 2% cellulose in the form of either microcrystals (20 μm) or nanocrystals obtained by acid hydrolysis. T...

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Published in:Journal of materials research 2018-09, Vol.33 (17), p.2598-2611
Main Authors: Villegas-Villalobos, Santiago, Díaz, Luis E., Vilariño-Feltrer, Guillermo, Vallés-Lluch, Ana, Gómez-Tejedor, José A., Valero, Manuel F.
Format: Article
Language:English
Subjects:
Applied and Technical Physics
Biocompatibility
Biological properties
Biomaterials
Biomedical materials
Calcification
Carbon
Castor oil
Catalysis
Catalysts
Cellulose
Cytotoxicity
Diisocyanates
Domains
Elongation
Ethanol
Fourier transforms
Hydrogen bonds
Inorganic Chemistry
International organizations
Materials Engineering
Materials research
Materials Science
Mechanical properties
Medical equipment
Microcrystals
Nanocomposites
Nanocrystals
Nanotechnology
Particle size
Polymer matrix composites
Polymers
Polyols
Polyurethane resins
Solvents
Tensile strength
Vegetable oils
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creator Villegas-Villalobos, Santiago
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Valero, Manuel F.
description Polyurethane/cellulose composites were synthesized from castor-oil-derived polyols and isophorone diisocyanate using dibutyltin dilaurate (DBTDL) as the catalyst. Materials were obtained by adding 2% cellulose in the form of either microcrystals (20 μm) or nanocrystals obtained by acid hydrolysis. The aim was to assess the effects of filler particle size and the use of a catalyst on the physicochemical properties and biological response of these composites. The addition of the catalyst was found to be essential to prevent filler aggregations and to enhance the tensile strength and elongation at break. The cellulose particle size influenced the composite properties, as its nanocrystals heighten hydrogen bond interactions between the filler surface and polyurethane domains, improving resistance to hydrolytic degradation. All hybrids retained cell viability, and the addition of DBTDL did not impair their biocompatibility. The samples were prone to calcification, which suggests that they could find application in the development of bioactive materials.
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subjects Applied and Technical Physics
Biocompatibility
Biological properties
Biomaterials
Biomedical materials
Calcification
Carbon
Castor oil
Catalysis
Catalysts
Cellulose
Cytotoxicity
Diisocyanates
Domains
Elongation
Ethanol
Fourier transforms
Hydrogen bonds
Inorganic Chemistry
International organizations
Materials Engineering
Materials research
Materials Science
Mechanical properties
Medical equipment
Microcrystals
Nanocomposites
Nanocrystals
Nanotechnology
Particle size
Polymer matrix composites
Polymers
Polyols
Polyurethane resins
Solvents
Tensile strength
Vegetable oils
title Effect of an organotin catalyst on the physicochemical properties and biocompatibility of castor oil-based polyurethane/cellulose composites
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