Results 31 to 40 of about 1,142 (152)

Modificação das propriedades das fibras de curauá por acetilação Modification of the properties of curauá fibers by acetylation

Revista Brasileira de Engenharia Agrícola e Ambiental, 2011
Nos compósitos cimentíceos as fibras vegetais podem sofrer vários graus de degradação quando expostas ao ambiente alcalino. O meio alcalino degrada os componentes macromoleculares das fibras, principalmente pela solubilização da lignina e a desfibrilação
Fernanda F. M. Lopes, Gilmar T. Araújo, Saionara Luna, José W. B. do Nascimento, Valneide R. da Silva   +4 more
doaj   +1 more source

Mechanical properties of composites with graphene oxide functionalization of either epoxy matrix or curaua fiber reinforcement

Journal of Materials Research and Technology, 2020
In the present work, two types of composites were produced, both reinforced with 30 vol% of curaua fibers (CF). In the first type, only the fiber was functionalized with graphene oxide (GO), producing the GOCF/EM composite.
Ulisses Oliveira Costa, Lucio Fabio Cassiano Nascimento, Julianna Magalhães Garcia, Wendell Bruno Almeida Bezerra, Garcia Filho Fabio da Costa, Fernanda Santos da Luz, Wagner Anacleto Pinheiro, Sergio Neves Monteiro   +7 more
doaj   +1 more source

Tensile behavior analysis combined with digital image correlation and mechanical and thermal properties of microfibrillated cellulose fiber/ polylactic acid composites

Polymer Testing, 2022
Microfibrillated cellulose (MFC) employed as reinforcement of polymeric matrices can increase elastic modulus, stiffness and strength of a composite. In this work, the assessment of the mechanical, thermal properties and tensile tests assisted by digital
Luiz C.C. Jesus, Janaíne M. Oliveira, Rosineide M. Leão, Lílian R. Beltrami, Ademir J. Zattera, Carla T.M. Anflor, Thiago C.R. Doca, Sandra M. Luz   +7 more
doaj   +1 more source

Cellulose Nanowhiskers Extracted from Tempo-Oxidized Curaua Fibers

Journal of Natural Fibers, 2020
The objective of this study was to obtain nanowhiskers from bleached and milled curaua fibers. Nanowhiskers were obtained via a TEMPO system. TEM micrographies proved the fibers were obtained.
Roberta Motta Neves, Kirk Silveira Lopes, Matheus G.V. Zimmermann, Matheus Poletto, Ademir J. Zattera   +4 more
doaj   +1 more source

Processing, thermal and mechanical properties of composite laminates with natural fibers prepregs [PDF]

, 2022
This work manufactured prepregs by impregnating discontinuous curaua fibers with B-stage epoxy resin. The prepreg layers were then stacked to produce laminates by hot compression.
Amico, Sandro Campos, Libera Junior, Vilson Dalla, Luz, Sandra Maria da, Teixeira, Linconl Araujo   +3 more
core  

New Brazilian pineapple leaf fibers for textile application: cottonization and dyeing performance [PDF]

, 2020
This work evaluates the dyeing performance associated with a cottonization and bleaching pretreatment of pineapple leaf fibers from two diferent species from Brazil: curaua (A. lucidus syn. A. erectifolius) and red pineapple (A.
Broega, A. C., Santiago de Queiroz, R., Silva, Ana Patrícia Veiga da, Souto, A. Pedro   +3 more
core   +1 more source

The Role of Chemical Treatments on Curaua Fibers on Mechanical and Thermal Behavior of Biodegradable Composites

Applied Sciences
Biodegradable composites combining thermoplastic polymers and natural fibers could originate materials with synergetic mechanical and thermal properties, keeping their biodegradability.
Janaíne M. de Oliveira, Vitor M. Z. Sousa, Linconl A. Teixeira, Rosineide M. Leão, Rita C. M. Sales-Contini, Volker F. Steier, Sandra M. da Luz   +6 more
doaj   +1 more source

Application of the Artificial Neural Network (ANN) Approach for Prediction of the Kinetic Parameters of Lignocellulosic Fibers

Textiles, 2021
Lignocellulosic fibers are widely applied as reinforcement in polymer composites due to their properties. The thermal degradation behavior governs the maximum temperature at which the fiber can be applied without significant mass loss.
Heitor Luiz Ornaghi, Roberta Motta Neves, Francisco M. Monticeli   +2 more
doaj   +1 more source

Risk assessment of released cellulose nanocrystals – mimicking inhalatory exposure [PDF]

, 2013
Cellulose nanocrystals (CNCs) exhibit advantageous chemical and mechanical properties that render them attractive for a wide range of applications. During the life-cycle of CNC containing materials the nanocrystals could be released and become airborne ...
Clift, Martin J. D., Endes, Carola, Foster, E. Johan, Müller, S., Petri-Fink, Alke, Rothen-Rutishauser, Barbara, Schmid, O., Vanhecke, Dimitri, Weder, Christoph   +8 more
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Composites of natural rubber with curaua fibers [PDF]

Polímeros
This paper analyzed the thermal and mechanical properties of natural rubber/curaua fiber composite with different weight contents (2.5% to 15%). Alkali treatment was used to modify the surface of curaua fiber and improve interfacial bonding.
João D’Anuzio Lima de Azevedo, Virgínia Mansanares Giacon, José Roberto Ribeiro Bortoleto   +2 more
doaj   +1 more source