On the Analysis of Concentration-Dependent Diffusion Using Transient Sorption and Permeation Measurements by the D1–D8 System

Borys, Przemysław; Rybak, Aurelia; Grzywna, Zbigniew J.

doi:10.1021/ie302333d

Cited by 12 publications

(4 citation statements)

References 23 publications

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“…One of the known estimates of such average, addressed to permeation experiments was proposed by Crank in ref. [30] by considering the stationary flux of mass in a permeation experiment, also analysed by Borys in [34]:D=1C0−C2∫C0C2D(c)dC…”

Section: Resultsmentioning

confidence: 99%

A Simple Methodology to Estimate the Diffusion Coefficient in Pervaporation-Based Purification Experiments

Dudek

Borys

2019

Polymers

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A procedure to estimate the diffusion coefficient in solution–diffusion models of hydrophilic membranes used in pervaporation-based purification experiments is presented. The model is based on a series solution of the general permeation problem. It considers a membrane that can be filled with water or with the feed solution before the measurement. Furthermore, the length of the tubing between the permeation cell and the place of cold traps is also addressed. To illustrate the parameter estimation procedure, we have chosen the data for the separation of water and ethanol by chitosan membranes. It is shown that the diffusion coefficient can be estimated effectively from the time course of the transported mass and by the analysis of certain well defined time lags of the permeation curve.

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Section: Resultsmentioning

confidence: 99%

A Simple Methodology to Estimate the Diffusion Coefficient in Pervaporation-Based Purification Experiments

Dudek

Borys

2019

Polymers

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“…It was also discussed the role of these channels in the separation of oxygen and nitrogen, characterized by various magnetic properties and in a different way interacting with those magnetic channels [30,[32][33][34]. …”

Section: Results Of Mechanical Measurementsmentioning

confidence: 99%

“…We have used the potential difference between magnetic properties of paramagnetic oxygen and diamagnetic nitrogen, what has provided the differentiated conditions (other than sorption-diffusion) in mass transport of the separated gases and given the opportunity for their separation [26][27][28][29][30][31][32]. This paper is the continuation of our earlier works [28][29][30][31][32][33][34], which stated that the incorporation of magnetic micropowders into the polymer matrix (EC, PPO) improved the gas transport properties of produced membranes. In this work, we are going further to exam, the mechanical, rheological and magnetic properties of various magnetic hybrid membranes (EC and PPO with dispersed magnetic powders, like commercial MQP-14-12, MQP-16-7 and MQP-B with a particle size 5, 25 μm and 20-50 μm).…”

Section: Introductionmentioning

confidence: 99%

Characterization of Selected Parameters of Organic-Inorganic Hybrid Membranes Based on Various Polymers and Nd-Fe-B Fillers

Rybak¹,

Kaszuwara²

2016

Archives of Metallurgy and Materials

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In this paper magnetic organic-inorganic hybrid membranes based on EC, PPO polymer matrices and various magnetic powder microparticles were synthesized and studied. Constant pressure permeation technique and the Time Lag method were used to obtain the gas transport coefficients. The mechanical, rheological and magnetic parameters of magnetic hybrid membranes were examined. It was found that their separation and gas transport properties (D, P, S and α) were improved with the decrease in powder particle size and the increase of membrane’s remanence, saturation magnetization and magnetic particle filling. The increase of the magnetic powder addition and a decrease of its granulation improved also mechanical and rheological parameters of the tested membranes. This improvement also had a positive effect on their gas separation properties and their potential usage in the future.

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“…where HLB-hydrophilic/lipophilic balance, M hphil -molecular weight of the hydrophilic fraction, M n -molecular weight of the copolymer, D-diffusion coefficient, e-membrane thickness, t-lag time, J-flow through the membrane, ∆c-concentration difference on either side of the membrane [28].…”

Section: Permeation Tests In Franz Diffusion Cellsmentioning

confidence: 99%

PEG Graft Polymer Carriers of Antioxidants: In Vitro Evaluation for Transdermal Delivery

2020

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The in vitro biochemical evaluation of the applicability of polymers carrying active substances (micelles and conjugates) was carried out. Previously designed amphiphilic graft copolymers with retinol or 4-n-butylresorcinol functionalized polymethacrylate backbone and poly(ethylene glycol) (PEG) side chains that included Janus-type heterografted copolymers containing both PEG and poly(ε-caprolactone) (PCL) side chains were applied as micellar carriers. The polymer self-assemblies were convenient to encapsulate arbutin (ARB) as the selected active substances. Moreover, the conjugates of PEG graft copolymers with ferulic acid (FA) or lipoic acid (LA) were also investigated. The permeability of released active substances through a membrane mimicking skin was evaluated by conducting transdermal tests in Franz diffusion cells. The biological response to new carriers with active substances was tested across cell lines, including normal human dermal fibroblasts (NHDF), human epidermal keratinocyte (HaCaT), as well as cancer melanoma (Me45) and metastatic human melanoma (451-Lu), for comparison. These polymer systems were safe and non-cytotoxic at the tested concentrations for healthy skin cell lines according to the MTT test. Cytometric evaluation of cell cycles as well as cell death defined by Annexin-V apoptosis assays and senescence tests showed no significant changes under action of the delivery systems, as compared to the control cells. In vitro tests confirmed the biochemical potential of these antioxidant carriers as beneficial components in cosmetic products, especially applied in the form of masks and eye pads.

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On the Analysis of Concentration-Dependent Diffusion Using Transient Sorption and Permeation Measurements by the D₁–D₈ System

Cited by 12 publications

References 23 publications

A Simple Methodology to Estimate the Diffusion Coefficient in Pervaporation-Based Purification Experiments

A Simple Methodology to Estimate the Diffusion Coefficient in Pervaporation-Based Purification Experiments

Characterization of Selected Parameters of Organic-Inorganic Hybrid Membranes Based on Various Polymers and Nd-Fe-B Fillers

PEG Graft Polymer Carriers of Antioxidants: In Vitro Evaluation for Transdermal Delivery

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