Cellulose Fibers
Mostrando 1-12 de 124 artigos, teses e dissertações.
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1. CELLULOSE NANOFIBERS FROM CASSAVA AGRO-INDUSTRIAL WASTE AS REINFORCEMENT IN PVA FILMS
Cellulose nanofibers (CNF) have been applied in composite systems due to the abundance of raw material, excellent mechanical and thermal properties. In this work, CNF was prepared from agroindustrial waste and used in specified amounts in polyvinyl alcohol (PVA) composites. The FTIR spectra of CNF, chemically purified cellulose (CPC) and Cassava Agro-industr
Quím. Nova. Publicado em: 2020-06
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2. Comportamento térmico de compósitos de poliestireno reciclado reforçado com celulose de bagaço de cana
RESUMO O poliestireno expandido (EPS) é um polímero reciclável amplamente utilizado na fabricação de embalagens para isolamento acústico, proteção de bens de consumo duráveis e na indústria da construção civil. O PS é facilmente reciclável com o aumento da temperatura, podendo dar origem a novos materiais. Entretanto suas propriedades térmicas
Matéria (Rio J.). Publicado em: 16/09/2019
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3. Caracterização de partículas de açaí visando seu potencial uso na construção civil
RESUMO Na Amazônia, o principal potencial de contribuição para os Objetivos de Desenvolvimento Sustentável (ODS), está no aproveitamento de resíduos da agroindústria para uso na construção civil, como alternativa de novos materiais sustentáveis. Neste contexto, objetivou-se com este trabalho avaliar o potencial uso de partículas de resíduos de a�
Matéria (Rio J.). Publicado em: 16/09/2019
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4. THE EFFECT OF CELLULOSE NANOCRYSTALS IN SUGARCANE BAGASSE PARTICLEBOARDS OF PITH AND FIBERS
ABSTRACT The aim of this research was to investigate sugarcane bagasse (SCB) particleboards, using two kinds of particles, from pith and fibers, reinforced with cellulose nanocrystals (NCC). The NCCs were dispersed in the adhesive urea formaldehyde (UF) using a sonificator in two proportions (0 and 1%). The NCCs and UF were applied in the SCB particles using
CERNE. Publicado em: 09/09/2019
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5. Cellulose Nanocrystals and Jute Fiber-reinforced Natural Rubber Composites: Cure Characteristics and Mechanical Properties
A comparative study was conducted for three natural rubber (NR) composites: one containing raw jute fibers, one containing bleached jute fibers, and one containing cellulose nanocrystals (CNCs). The composites were prepared by adding each filler at 5 or 10 phr to the latex before chemical coagulation, and the composites were processed in a two-roll mixing mi
Mat. Res.. Publicado em: 26/08/2019
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6. DEVELOPMENT OF INEXPENSIVE CELLULOSE-BASED SORBENTS FOR CARBON DIOXIDE
ABSTRACT Aqueous amine solutions are benchmark solvents for CO2 capture and their operational drawbacks are well-known. In order to overcome these problems, the support of amines on solid materials appears as an option for CO2 capture. Cellulose is a versatile and low-cost material that can be used as a support. This study reports chemical modification of ce
Braz. J. Chem. Eng.. Publicado em: 15/07/2019
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7. Sorbent system based on acetylated microfibrillated cellulose for remediation of oil aquatic environments
ABSTRACT The growth of oil exploration and transport in marine environments brings concern over potential environmental disasters caused by oil spills. Thus, various materials are being developed and studied in order to minimize environmental impacts caused by these oil spills. Among these materials, the use of sorbents has appeared as a great potential tech
Matéria (Rio J.). Publicado em: 10/06/2019
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8. Characterization of hibiscus sabdariffa fiber as potential reinforcement for denture acrylic resins
ABSTRACT This study aimed to determine the characteristics of Hibiscus sabdariffa as a fiber-reinforcement material for denture acrylic resins. The Hibiscus sabdariffa fiber was extracted by hot water retting. The fiber was treated at room temperature in aqueous solution of NaOH for 8 hours at 8% concentration. Micrometre gauge and Field emission scanning el
Matéria (Rio J.). Publicado em: 06/12/2018
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9. Cellulose nanomaterials: size and surface influence on the thermal and rheological behavior
Abstract Cellulose nanocrystals (CNC) and nanofibrils (CNF) were obtained by acid hydrolyzis and mechanical treatment, respectively, of cellulosic fibers from paper. Additionally, surface modification was performed for CNC by neutralization (NaOH) and oxidation (TEMPO). The thermal stability, surface properties and rheological behavior of these nanomaterial
Polímeros. Publicado em: 21/05/2018
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10. The effect of micronized corn fiber on body weight, glycemia, and lipid metabolism in rats fed cafeteria diet
Abstract During corn industrial dry milling, a residue rich in dietary fibers is generated. This study aimed to evaluate the effects of micronized corn fiber (MCF) as part of a cafeteria diet in the macronutrient metabolism and body weight. Wistar male rats, with initial body weight of 249 ± 14 g (n = 13), received AIN-93M diet (Group 1) or cafeteria diet
Food Sci. Technol. Publicado em: 07/05/2018
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11. Effect of Alkaline and Hot Water Treatments on the Structure and Morphology of Piassava Fibers
The effect of alcaline and hot water surface treatments of piassava Attalea funifera fibers was investigated. The efficiency of each treatment was evaluated by Fourier transform infrared spectroscopy, X-ray diffractometry, optical microscopy, scanning electron microscopy and atomic force microscopy. The alkaline treatments were effective in removing the supe
Mat. Res.. Publicado em: 01/02/2018
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12. Production of biodegradable starch nanocomposites using cellulose nanocrystals extracted from coconut fibers
Abstract Different polymeric matrices have been investigated for use in the development of biodegradable films. The incorporation of cellulose nanocrystals in such films has particularly attracted attention because of the potential for achieving improved properties of starch nanocomposites. In the present study, cellulose nanocrystals were extracted from coc
Polímeros. Publicado em: 2017-12