Electrolyte diffusion in a chitosan membrane

Vasconcelos, C.L. de; Rocha, Aluizio; Pereira, M.R.; Fonseca, J. L. C.

doi:10.1002/pi.627

Cited by 13 publications

(5 citation statements)

References 18 publications

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“…Hence, UF was considered as an effective alternative process for heavy metal rejection. Researchers have found that chitosan membranes could effectively be applied for aqueous salt solutions by diffusion 8…”

Section: Introductionmentioning

confidence: 99%

Polyurethane and sulfonated polysulfone blend ultrafiltration membranes: II. Application studies

Malaisamy

Mohan

Rajendran

2003

Polymer International

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Ultrafiltration membranes are largely being applied for macromolecular and heavy metal ion separations from aqueous streams. Polyurethane‐ and sulfonated‐ polysulfone‐based membranes prepared in the absence and presence of the polymeric additive, poly(ethylene glycol) 600, in various compositions, were subjected to the rejection of macromolecular proteins, such as bovine serum albumin, egg albumin, pepsin and trypsin. Toxic heavy metal ions such as Cu2+, Ni2+, Cd2+ and Zn2+ were subjected to rejection by the blend membranes by complexing them with a polymeric ligand, polyethyleneimine. The effects of polymer blend compositions and additive concentrations on the rejection and permeate flux of both proteins and metal ions are discussed. The rejection and permeate flux efficiencies of the blend membranes are compared with pure sulfonated polysulfone membranes. © 2003 Society of Chemical Industry

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Section: Introductionmentioning

confidence: 99%

Polyurethane and sulfonated polysulfone blend ultrafiltration membranes: II. Application studies

Malaisamy

Mohan

Rajendran

2003

Polymer International

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“…The Qh element was added to represent the heterogeneous characteristics of the oxide layer. For sample P2, a Warburg impedance element was needed to fit the data, hinting that a diffusion-controlled charge transfer takes place at the coating-substrate interface [41]. The behavior of the oxide film described by the parallel elements (Rx-Qx) attributed to the oxide film in sample P1 is masked in sample P2 by the addition of chitosan, which completely covers the oxide structures and fills the pores, thus becoming (Rf-Qf-Wf).…”

Section: Electrochemical Characterizationmentioning

confidence: 99%

Complex Bioactive Chitosan–Bioglass Coatings on a New Advanced TiTaZrAg Medium–High-Entropy Alloy

Stoian

Nartita

Totea³

et al. 2023

Coatings

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High-entropy alloys (HEAs), also known as multicomponent or multi-principal element alloys (MPEAs), differ from traditional alloys, which are usually based only on one principal element, in that they are usually fabricated from five or more elements in large percentages related to each other, in the range of 5%–35%. Despite the usually outstanding characteristics of HEAs, based on a properly selected design, many such alloys are coated with advanced composites after their elaboration to further improve their qualities. In this study, 73Ti-20Zr-5Ta-2Ag samples were covered with chitosan and a mixture of chitosan, bioglass, and ZnO particles to improve the materials’ antibacterial properties. A variety of methods, including scanning electron microscopy, atomic force microscopy, and mechanical and electrochemical determinations, has permitted a quantified comparison between the coated and uncoated surfaces of this medium–high-entropy alloy. The materials’ properties were enhanced by the complex coating, giving the alloys not only high antibacterial activity, but also good corrosion protection.

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“…Membranas de quitosana pura ou misturadas com outras substâncias são utilizadas com sucesso na produção de curativos, no tratamento de queimaduras como pele artificial, promovendo uma cicatrização rápida do tecido, diminuindo os riscos de infecção da região afetada (MACÊDO, 2013;VASCONCELOS, 2001).…”

Section: Descrição Da Tecnologiaunclassified

Prospective Study Incorporation of Net of Cashew Nuts Shell Liquid (Cnsl - Technical) in Chitosan Membrane for Use as Biomaterial

Bastos

Júnior²,

Macêdo³

et al. 2020

RGEINTEC

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A quitosana é um polímero proveniente da desacetilação da quitina; possui composição que permite a formação de géis, filmes e fibras, possibilitando a sua utilização na preparação de membranas. Normalmente, a quitosana é utilizada com outros polímeros para obtenção de biomateriais com propriedades mais específicas. Dentre esses, elegeu-se o líquido da castanha de caju (LCC) muito utilizado na medicina como antissépticos e vermífugos. Têm-se observado que membranas de quitosana pura ou misturadas com outras substâncias são utilizadas na produção de curativos e no tratamento de queimaduras. Com base nessas informações foi realizado um estudo prospectivo de artigos e patentes relacionados à aplicação de membranas de quitosana misturadas com LCC na área biomédica. Com as pesquisas realizadas no Science Direct Elsevier's e Web of Science, para busca de artigos, e no INPI, EPO e USPTO para busca de patentes, não foi encontrado nenhum trabalho científico que indicasse existência de membranas de quitosana com LCC, bem como sua aplicação em qualquer área.

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Electrolyte diffusion in a chitosan membrane

Cited by 13 publications

References 18 publications

Polyurethane and sulfonated polysulfone blend ultrafiltration membranes: II. Application studies

Polyurethane and sulfonated polysulfone blend ultrafiltration membranes: II. Application studies

Complex Bioactive Chitosan–Bioglass Coatings on a New Advanced TiTaZrAg Medium–High-Entropy Alloy

Prospective Study Incorporation of Net of Cashew Nuts Shell Liquid (Cnsl - Technical) in Chitosan Membrane for Use as Biomaterial

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