Cellulose Film
Mostrando 1-12 de 35 artigos, teses e dissertações.
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1. EVALUATION OF POLY(VINYL ALCOHOL) ADDITION EFFECT ON NANOFIBRILLATED CELLULOSE FILMS CHARACTERISTICS
ABSTRACT In this study, based on the mechanical shear treatment, the cellulosic pulp was fibrillated in nanofibrils dispersed in aqueous suspension. Nanofibrillated Cellulose (NFC) matrix - Polyvinyl Alcohol (PVA) nanocomposite films’ were prepared by casting from NFC/PVA suspension mixtures. The thermal and mechanical properties of the obtained films were
CERNE. Publicado em: 2020-03
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2. Curativo com filme e gel de biopolímero de celulose bacteriana no tratamento de feridas isquêmicas após revascularização de membros inferiores.
RESUMO Objetivo: avaliar o uso do curativo de filme e gel de biopolímero de celulose bacteriana no tratamento de pacientes com feridas isquêmicas submetidos à revascularização dos membros inferiores. Métodos: ensaio clínico randomizado realizado no ambulatório de Angiologia e Cirurgia Vascular do Hospital das Clínicas da Universidade Federal de Pe
Rev. Col. Bras. Cir.. Publicado em: 20/12/2019
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3. 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
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4. Characterization of low cost orally disintegrating film (ODF)
Abstract Orally disintegrating films (ODF) produced with a hydrophilic polymers are a thin and flexible material, wich disintegrate in contact with saliva and can vehicule bioactive materials. The aim of this study was to develop and characterize ODF formulation with potential to act as a carrier for different bioactives compounds prepared with low cost poly
Polímeros. Publicado em: 2017-03
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5. Immobilization of myoglobin in sodium alginate composite membranes
Abstract The immobilization of myoglobin in sodium alginate films was investigated with the aim of evaluating the protein stability in an ionic polymeric matrix. Myoglobin was chosen due to the resemblance to each hemoglobin tetramer. Sodium alginate, being a natural polysaccharide, was selected as the polymeric matrix because of its chemica
Polímeros. Publicado em: 2015-06
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6. Mechanical, thermal, and barrier properties of methylcellulose/cellulose nanocrystals nanocomposites
In this work, the effects of incorporating cellulose nanocrystals from soy hulls (WSH30) on the mechanical, thermal, and barrier properties of methylcellulose (MC) nanocomposites were evaluated. MC/WSH30 nanocomposite films with different filler levels (2, 4, 6, 8, and 10%) were prepared by casting. Compared to neat MC film, improvements in the mechanical an
Polímeros. Publicado em: 2014-12
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7. Development and characterization of hybrid materials based on biodegradable PLA matrix, microcrystalline cellulose and organophilic silica
The goal of this work was to investigate the production and properties of hybrid materials based on poly(lactic acid) (PLA), employing microcrystalline cellulose (MCC) and organophilic silica (R972) as fillers. The composites were obtained by solution casting to form films. Each nanoparticle was incorporated at 3 wt. %, relative to the polymer matrix. In thi
Polímeros. Publicado em: 30/09/2014
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8. Desenvolvimento de reator tipo "dip catalyst" para filmes poliméricos contendo nanopartículas de metais de transição
This article describes the development of a new catalytic reactor designed to operate with nanoparticle-embedded polymer thin films. Stabilization of metal nanoparticles in films that serve as catalysts in organic reactions is relatively new; therefore, the development of reactors to facilitate their use is necessary. We describe in detail the preparation of
Quím. Nova. Publicado em: 2014
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9. Obtenção de nanocelulose da fibra de coco verde e incorporação em filmes biodegradáveis de amido plastificados com glicerol
Composites strengthened with nanocellulose have been developed with the aim of improving mechanical, barrier, and thermal properties of materials. This improvement is primarily due to the nanometric size and the high crystallinity of the incorporated cellulose. Cassava starch films plasticized with glycerol and incorporated with nanocellulose from coconut fi
Quím. Nova. Publicado em: 2014
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10. Microbiological quality and other characteristics of refrigerated chicken meat in contact with cellulose acetate-based film incorporated with rosemary essential oil
Antimicrobial active packaging delays or inhibits microorganism growth in packed products, and it can be used in a variety of food systems. The objective of the present research was to develop packaging incorporated with natural antimicrobial agents (active film). The effects of the active film on the spoilage, pathogenic microorganism counts, pH and color o
Braz. J. Microbiol.. Publicado em: 2012-12
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11. Aplicabilidade de uma película de celulose cristalina no tratamento de feridas cutâneas induzidas em ratos wistar / Applicability of a film in natural biological treatment of skin wounds induced in Wistar rats
Wound healing aims to restore the morphological and functional integrity of the skin. This study evaluates by means of clinical and histologic healing process of skin wounds induced experimentally in rats using a film crystalline cellulose Veloderm . Thirty-two rats were divided into two groups: control group (CG) wounds treated with a solution of sodium chl
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/06/2011
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12. Nanocomposite edible films from mango puree reinforced with cellulose nanofibers.
2009
Journal of Food Science. Publicado em: 2011