Castor Oil Polyurethane
Mostrando 13-24 de 78 artigos, teses e dissertações.
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13. Conductive Composites Based on Polyurethane and Nanostructured Conductive Filler of Montmorillonite/Polypyrrole for Electromagnetic Shielding Applications
In this study, composites based on polyurethane (PU) derived from castor oil and montmorillonite/polypyrrole doped with dodecylbenzenesulfonic acid (MMt-PPy.DBSA) were developed. In order to investigate the potential use of these materials for electromagnetic shielding applications, the electrical and mechanical properties of PU/MMt-PPy.DBSA composites were
Mat. Res.. Publicado em: 30/07/2018
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14. Hybrid Sandwich Particleboard Made with Sugarcane, Pínus Taeda Thermally Treated and Malva Fibre from Amazon
A multilayer particleboard panels, consisted of sugarcane bagasse reinforced composite as core material and hybrid composites made with Pinus taeda particles and Malva fibres as facing materials, were designed and evaluated in this work. Tukey test was used to identify the effect of the facing material, considering different combinations of Pinus taeda parti
Mat. Res.. Publicado em: 18/12/2017
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15. Green polyurethane synthesis by emulsion technique: a magnetic composite for oil spill removal
Abstract After the consolidation of the Brazilian biodiesel industry, issues related to the final destination of the glycerin, the by-product from the biodiesel industrial process, drawing the attention of several researchers. There are several uses to this byproduct. Among them, the obtaining of polymers, such as polyurethane (PU), are very encouraged since
Polímeros. Publicado em: 2017-12
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16. Experimental study on waterproofing MDF with castor oil-based vegetal polyurethane
ABSTRACT This study aimed to analyze the waterproofing MDF with different coatings. For this, a comparative study was conducted with the following coatings on MDF: Vegetable polyurethane resin on castor oil-based, acrylic lacquer and marine varnish. To carry out the research, sewed up the samples in sequence, they received the coatings, and then we performed
Matéria (Rio J.). Publicado em: 10/08/2017
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17. Reuse of waste paper and rice hulls as filler in polymeric matrix composites
ABSTRACT Concerns for the environment are recurrent in our society, and research on low impact materials such as those produced from waste is an alternative. This work is based on the reuse of scrap paper and rice hulls aiming to increase the life cycle of these waste products and to find better destination. Composites with a volumetric filler content (dispe
Matéria (Rio J.). Publicado em: 20/07/2017
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18. Gamma radiation effect on sisal / polyurethane composites without coupling agents
Abstract Natural fibers and polyurethane based composites may present chemical bonding between the components of the polymer and the lignin of the fiber. The incidence of radiation can cause degradation of the polymeric material and alter its mechanical properties. The objective of this study was to obtain and characterize cold pressed composites from polyur
Polímeros. Publicado em: 29/06/2017
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19. A castor oil-containing dental luting agent: effects of cyclic loading and storage time on flexural strength
Favorable results in the use of castor oil polyurethane (COP) as pulp capping, membrane material, sealer, mouthwash and in bone repair, associated with the fact that Ricinus communis is not derived from petroleum and it is abundant in Brazil, encourage researches in the development of luting agents. Objectives This study compared the flexural strength (FS
J. Appl. Oral Sci.. Publicado em: 2014-12
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20. Particleboard manufactured from Tauari (Couratari oblongifolia) wood waste using castor oil based polyurethane resin
Several wood species from the Amazon region are used in the manufacture of furniture, which leaves behind large amounts of waste (slabs, sawdust, sanding dust and bark), thus causing serious environmental impacts. An interesting alternative for the use of these wastes is the manufacture of particleboards. However, few studies have focused on the behavior of
Mat. Res.. Publicado em: 18/02/2014
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21. Experimental Study of Polyurethane-Based Fuels with Addition of Paraffin and Aluminum for Hybrid Rocket Motors
ABSTRACT: Experimental investigation was conducted to determine the relative propulsive and combustion behavior of several polyurethane-based solid-fuel formulations containing 30% w/w of paraffin or 10% of aluminum powder. In total, seven solid-fuel formulations were investigated, four containing 30% of paraffin and three with 10% of aluminum. The polyureth
J. Aerosp. Technol. Manag.. Publicado em: 2013-09
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22. Preparation of poly(urethane-urea) nanoparticles containing açaí oil by miniemulsion polymerization
Polyurethane nanoparticles (NPs) are promising candidates for the controlled and targeted delivery of therapeutics in a variety of biomedical applications. In this work, a report is made of NPs produced by miniemulsion polymerization with isophorone diisocyanate (IPDI) and castor oil, glycerol, and poly(ethylene glycol) (PEG) with molar masses 400 and 1000 a
Polímeros. Publicado em: 27/08/2013
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23. Oat hulls as addition to high density panels production
Wood-based panels have been widely used around the world in various segments of timber industry. Thus, alternative raw-materials have been systematically researched in order to reduce of wood demand in particleboard production. The aim of this work was to produce and evaluate particleboards of Eucalyptus grandis and oat hulls (Avena sativa), bonded under pre
Mat. Res.. Publicado em: 13/08/2013
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24. Degradación in-vitro de mezclas de poliuretano termoplástico y almidón modificado
The chemical structure of the cassava starch was modified by acylation. Cassava starch modified was mixed with urethane prepolymer based on castor oil modified by transesterification (MCO) and isophorone diisocyanate (IPDI) in order to prepare starch-blended thermoplastic polyurethanes. Polyurethanes were exposed to in-vitro degradation then monitored for ch
Polímeros. Publicado em: 07/06/2013