Effect of molecular association on solubility, diffusion, and permeability in polymeric membranes

Wang, Baoguo; Yamaguchi, Takeo; Nakao, Shin-ichi

doi:10.1002/(sici)1099-0488(20000101)38:1<171::aid-polb20>3.0.co;2-y

Cited by 9 publications

(7 citation statements)

References 34 publications

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“…However, an obvious positive deviation was found in calculating mutual‐diffusion coefficients of chloroform in poly(vinyl acetate) as shown in Figure 7. This was attributed to the effect of hydrogen bonding, which usually increased intermolecular interactions and reduced solvent diffusivity, as reported in our previous study 15, 16…”

Section: Resultssupporting

confidence: 72%

“…An equation‐of‐state (EOS) is a useful tool for investigating macroscopic properties of polymers, such as viscoelasticity structural relaxation, thermal expansion, and molecule mobility. EOSs have been used in our previous studies to calculate solvent solubility in polymer membranes and successfully revealed the effect of molecular association on diffusivity 14–16. Generally, EOSs for polymer liquids (i.e.…”

Section: Introductionmentioning

confidence: 99%

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Prediction of solvent diffusion coefficient in amorphous polymers based on an equation‐of‐state

Lv¹,

Wang²

2006

J Polym Sci B Polym Phys

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This study develops a modified free‐volume model to predict solvent diffusion coefficients in amorphous polymers by combining the Vrentas–Duda model with the Simha–Somcynsky (S‐S) equation‐of‐state (EOS), and all the original parameters can be used in the modified model. The free volume of the polymer is estimated from the S‐S EOS together with the Williams‐Landel‐Ferry fractional free volume, and the complex process of determining polymer free‐volume parameters in the Vrentas–Duda model and measuring polymer viscoelasticity can be avoided. Moreover, the modified model includes the influence of not only temperature but also pressure on solvent diffusivity. Three common polymers and four solvents are employed to demonstrate the predictions of the modified model. The calculation results are generally consistent with the experimental values. It is reasonable to expect that the modified free‐volume model will become a useful tool in polymer process development. © 2006 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 44: 1000–1009, 2006

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Section: Resultssupporting

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Prediction of solvent diffusion coefficient in amorphous polymers based on an equation‐of‐state

Lv¹,

Wang²

2006

J Polym Sci B Polym Phys

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“…We are trying to develop a membrane design methodology for pervaporation or vapor permeation in which solvent solubility, diffusivity in polymer solution, and the suppression effect of membrane swelling must be estimated without any fitting parameters 6–8. Although the three factors can be estimated, the estimation methods should be improved to complete the design method.…”

Section: Introductionmentioning

confidence: 99%

Prediction and estimation of solvent diffusivities in polyacrylate and polymethacrylates

Yamaguchi

Wang

Matsuda

et al. 2003

J Polym Sci B Polym Phys

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The relationship between polymer side-chain length and the hole free volume that is effective for solvent diffusion was investigated for polyacrylates and polymethacrylates on the basis of free-volume theory. Measurements of a polymer's viscoelasticity and solvent diffusivity provided experimental evidence for polymer segment mobility, and the results indicated that hole free volume in a linear polymer increases with hydrocarbon side-chain length. Because the molecular mechanisms of polymer viscoelasticity and diffusivity are identical, the free-volume parameters obtained for polyacrylates and polymethacrylates by measuring the polymer viscoelastic-temperature dependence can reliably be used in predicting the solvent diffusion coefficient.

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“…It is one of the strongest permeabilising organic solvents with antipathogenic effects on Candida albicans [45,46], and it facilitates intake of active components (e.g., Ag and PEI) into the bacterial and fungal cells. Another Journal of Nanomaterials important property of chloroform is that it is a weak hydrogen donor, which may influence the ESA and the release of components [47,48]. The Ag + mild and PEI have medium cytotoxic effects, respectively.…”

Section: Discussionmentioning

confidence: 99%

“…It is possible that the released substance was a mix of the components. From another perspective, the weak hydrogen bonding of the solvent (chloroform) may influence the physical properties of the polymers and decrease the molecular mobility [47,48].…”

Section: Discussionmentioning

confidence: 99%

Antimicrobial Silver-Polyethyleneimine-Polylactic Acid Polymer Composite Film for Coating Methacrylate-Based Denture Surfaces

Géczi

Hermann

Kőhidai

et al. 2018

Journal of Nanomaterials

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To prepare an antimicrobial polymer composite composed of silver- (Ag-) polyethyleneimine- (PEI-) polylactic acid (PLA) in chloroform, for coating the mucosal surfaces of methacrylate-based dentures as a prospective therapy for denture stomatitis.The water-insoluble, tightly bound, hard, micrometre-thin, and colourless film exerts its effects by direct contact with the pathogens and via the active constituents (Ag, PEI, and Ag-PEI) released slowly into the mucosa’s salivary layer. Silver and PEI were blended at 140°C, then bound to PLA. The Ag-PEI complex was characterised by dynamic light scattering and transmission electron microscopy, and the Ag-PEI-PLA composite was examined by atomic force microscopy and micro-computed tomography. The characteristic was measured by atomic force microscopy (AFM) and micro-computed tomography (micro-CT). The quantity of water-soluble Ag-PEI complex released from the composite film was measured with gravimetry. The cellular physiological effects were analysed by impedimetry and computer-based morphometry using human gingival epithelial cells. A real-time cell proliferation assay revealed moderate toxic effects of Ag-PEI on the epithelium. The viscous Ag-PEI-PLA solution produced could be applied as a thin film on methacrylate surfaces. Active antimicrobial components (Ag, PEI, and Ag-PEI) were released from the hard, tightly bound Ag-PEI-PLA coating. This study’s findings verified the applicability of the antimicrobial Ag-PEI-PLA composite for coating the inner surfaces of acrylate dentures. Owing to the well-known antimicrobial effects of silver and PEI and the supplementary effects of chloroform, this composite provides a new therapeutic method for denture stomatitis that can be easily performed by dentists.

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Effect of molecular association on solubility, diffusion, and permeability in polymeric membranes

Cited by 9 publications

References 34 publications

Prediction of solvent diffusion coefficient in amorphous polymers based on an equation‐of‐state

Prediction of solvent diffusion coefficient in amorphous polymers based on an equation‐of‐state

Prediction and estimation of solvent diffusivities in polyacrylate and polymethacrylates

Antimicrobial Silver-Polyethyleneimine-Polylactic Acid Polymer Composite Film for Coating Methacrylate-Based Denture Surfaces

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