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Preparation and characterization of the bacterial cellulose/polyurethane nanocomposites
(2013-02-12)
New nanocomposites based on bacterial cellulose nanofibers (BCN) and polyurethane (PU) prepolymer were prepared and characterized by SEM, FT-IR, XRD, and TG/DTG analyses. An improvement of the interface reaction between ...
Biodegradation of polyurethane derived from castor oil
(Associação Brasileira de Polímeros, 2008-09-01)
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. ...
Production and characterization of polyurethane castor oil (Ricinus communis) foam for nautical fender
(2019-02-01)
Due to the fact that in South America old tires have been usually tied to vessels and convoys for the purpose of their lateral protection, this study was designed to address a contribution to the replacement of such material, ...
Multicomponent polyurethane-carbon black composite as piezoresistive sensor
(Springer, 2020-06-01)
Composite of carbon black (CB) dispersed into a multicomponent polyurethane matrix combines the good mechanical properties of the polymer, such as elasticity, with the electrical property of the conducting particles. ...
1-3 castor oil-based polyurethane/PZT piezoelectric composite as a possible candidate for structural health monitoring
(2020-10-26)
In this study, we obtained and characterized a piezoelectric composite with 1-3 connectivity from castor oil polyurethane (PUR) and lead zirconate titanate (PZT) rods. Two samples were obtained, one with 15% PZT volume and ...
Influence of cellulose nanofibrils on soft and hard segments of polyurethane/cellulose nanocomposites and effect of humidity on their mechanical properties
(Elsevier B.V., 2014-12-01)
Cellulose nanofibrils (CNFs) were prepared by sulfuric acid hydrolysis from cotton microfibers, and used to prepare polyurethane (PU) nanocomposites by mixing CNFs and PU water suspensions. CNFs as nanofillers improved the ...
Sugarcane Bagasse Fibers Reinforced in Polyurethane for Sorption of Vegetal Oil
(2020-01-01)
To enhance the removal of vegetal oil from water, the influence of the concentration of fibers from sugarcane bagasse pretreated by the steam explosion as reinforcement in polyurethane foam was used. The composites were ...
Comparison between polyurethanes containing castor oil (Soft Segment) and cancellous bone autograft in the treatment of segmental bone defect induced in rabbits
(2007-01-01)
The aim of this study is to compare polyurethanes containing castor oil (soft segment) in granular form compared to cancellous bone autograft applied to a segmental bone defect. Norfolk adult female rabbits - approximately ...
Comparison between polyurethanes containing castor oil (Soft Segment) and cancellous bone autograft in the treatment of segmental bone defect induced in rabbits
(2007-01-01)
The aim of this study is to compare polyurethanes containing castor oil (soft segment) in granular form compared to cancellous bone autograft applied to a segmental bone defect. Norfolk adult female rabbits - approximately ...