Adsorption and desorption properties of grafted polyethylene films modified with polyethylenimine chains

Yamada, Kazunori; Saitoh, Y.; Haga, Y.; Matsuda, Kazuo; Hirata, Mitsuo

doi:10.1002/app.25168

Cited by 16 publications

(8 citation statements)

References 35 publications

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“…The 1.0 wt % chitosan solutions were prepared in an aqueous acetic acid solution of 1.0 w/v% and their viscosities were measured by a Brookfield DV II+ viscometer with S18, S25, or S34 spindles at a rotation speed of 1 rpm. The degrees of deacetylation of the chitosan samples used were determined by the colloid titration method 8, 13–16. After the pH values of 50‐cm 3 sample solutions of chitosan at C chitosan = 0.020–0.025 mg/cm 3 were adjusted to 3–4 with 0.1–2 M HCl, the chitosan solutions were titrated with an aqueous potassium poly(vinyl alcohol) sulfate (KPVS) solution at a sulfate group concentration, C KPVS , of 0.00251 mmol/cm 3 using an ART‐3 type HIRAMA automatic recording titrator.…”

Section: Methodsmentioning

confidence: 99%

Application of chitosan solutions gelled by melB tyrosinase to water‐resistant adhesives

Yamada

Aoki

Ikeda

et al. 2007

J of Applied Polymer Sci

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An investigation was undertaken on the application of dilute chitosan solutions gelled by melB tyrosinase-catalyzed reaction with 3,4-dihydroxyphenethylamine (dopamine). The tyrosinase-catalyzed reaction with dopamine conferred water-resistant adhesive properties to the semi-dilute chitosan solutions. The viscosity of the chitosan solutions highly increased by the tyrosinase-catalyzed quinone conversion and the subsequent nonenzymatic reactions of o-quinones with amino groups of the chitosan chains. The viscosity of chitosan solutions highly increased in shorter reaction times by addition of melB tyrosinase. Therefore, in this study, the gelation of a chitosan solution was carried out without poly(ethylene glycol) (PEG), which was added for the gelation of chitosan solutions using mushroom tyrosinase. The highly viscous, gel-like modified chitosan materials were allowed to spread onto the surfaces of the glass slides, which were tightly lapped together and were held under water. Tensile shear adhesive strength of over 400 kPa was observed for the modified chitosan samples. An increase in either amino group concentration of the chitosan solutions or molecular mass of the chitosan samples used effectively led to an increase in adhesive strength of the glass slides. Adhesive strength obtained by chitosan materials gelled enzymatically was higher than that obtained by a chitosan gel prepared with glutaraldehyde as a chemical crosslinking agent. In addition, the use of melB tyrosinase led to a sharp increase in adhesive strength in shorter reaction times without other additives such as PEG.

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Section: Methodsmentioning

confidence: 99%

Application of chitosan solutions gelled by melB tyrosinase to water‐resistant adhesives

Yamada

Aoki

Ikeda

et al. 2007

J of Applied Polymer Sci

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“…The degrees of deacetylation of the chitosan samples used were determined by the colloid titration method. [15][16][17][18] After the pH values of 50 cm 3 sample solutions of chitosan at 0.02-0.025 mg/cm 3 were adjusted to 3 to 4 with 0.1-2M HCl, the chitosan solutions were titrated with an aqueous potassium poly (vinyl alcohol) sulfate (KPVS) solution at a sulfate group concentration, C KPVS , of 0.00251 mmol/cm 3 using an ART-3 type HIRAMA automatic recording titrator. The end point of the titration was determined by measuring turbidity at 420 nm.…”

Section: Chemicalsmentioning

confidence: 99%

Application of enzymatically gelled chitosan solutions to water‐resistant adhesives

Yamada

Aoki

Ikeda

et al. 2007

J of Applied Polymer Sci

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An investigation was undertaken on the application of dilute chitosan solutions gelled by tyrosinase-catalyzed reaction with 3,4-dihydroxyphenethylamine (dopamine). The tyrosinase-catalyzed reaction with dopamine conferred water-resistant adhesive properties to the semidilute chitosan solutions. The viscosity of the chitosan solutions increased highly by the tyrosinase-catalyzed reaction and the subsequent reactions between o-quinone compounds and chitosan. These highly viscous, gel-like modified chitosan materials were allowed to spread onto the surfaces of the glass slides, which were tightly lapped together and held them in water. Tensile shear adhesive strength of over 400 kPa was observed for the modified chitosan samples. The increase in the amino group concentration of the chitosan solutions and the molecular mass of the chitosan used effectively led to the increase in adhesive strength of the glass slides. In addition, in the case where the chitosan solution was gelled by the enzymatic reaction with dopamine in the presence of poly(ethylene glycol), adhesive strength sharply increased at shorter reaction times concomitantly with the increase in the viscosity of the chitosan solutions because the tyrosinase activity effectively was retained by poly(ethylene glycol).

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“…The contact angles for water on the surfaces of the Plasma Treatment and Subsequent Photografting of Methacrylic Acid PTFE-g-PMAA plates were measured by the sessile drop method at 25°C with a Kyowa Kagaku TYP-QI-type goniometer (Tokyo, Japan) and the cos θ values were obtained from the average values. The PTFE-g-PMAA plates were immersed in water at 30°C for 24 h. Then, the PTFE-g-PMAA plates were taken out of water, blotted with a filter paper to remove water attached to their surfaces, and weighed as quickly as possible [38,43].…”

Section: Modified Hydrophilic Propertiesmentioning

confidence: 99%

Improvement of Adhesive Strength of Poly(tetrafluoroethylene) Plates through Oxygen Plasma Treatment and Subsequent Photografting of Methacrylic Acid

Yamada¹

2018

IJMSA

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Methacrylic acid (MAA) was grafted onto the surface of a poly(tetrafluoroethylene) (PTFE) plate by the combined use of the plasma treatment and photografting, and the adhesive strength between the MAA-grafted PTFE (PTFE-g-PMAA) plates with the same grafted amounts was investigated in relation to the location of grafting as well as the wettability and water absorptivity. The grafted amount at which the substrate breaking occurred at lower grafted amounts for the PTFE-g-PMAA plates prepared by the plasma treatment for shorter times before the photografting and by the photografting at higher monomer concentrations and/or at lower monomer concentrations after the plasma treatment. These grafting conditions are found to be factors affecting the location of photografting, the thickness and water absorptivity of the grafted layer, and wettability of the surface of the grafted layer. The substrate breaking was observed at the minimum grafted amount (about 2.2 µmol/cm 2 ) for the PTFE-g-PMAA plates prepared at 2.0 M and 60°C after the plasma treatment for 10 s and at 2.0 M and 40°C after the plasma treatment for 120 s. The obtained results support that the combination of the oxygen plasma treatment with photografting of MAA is an effective procedure to enhance the adhesivity of the PTFE surface.

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Adsorption and desorption properties of grafted polyethylene films modified with polyethylenimine chains

Cited by 16 publications

References 35 publications

Application of chitosan solutions gelled by melB tyrosinase to water‐resistant adhesives

Application of chitosan solutions gelled by melB tyrosinase to water‐resistant adhesives

Application of enzymatically gelled chitosan solutions to water‐resistant adhesives

Improvement of Adhesive Strength of Poly(tetrafluoroethylene) Plates through Oxygen Plasma Treatment and Subsequent Photografting of Methacrylic Acid

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