Ion Association of Protonated Poly(vinylamine) and Poly(ethylenimine) with Poly(vinyl sulfate) and Dodecylbenzenesulfonate as Special Reference for Colloidal Titration

Hattori, Toshiaki; Katai, Kazuhito; Hattori, Sadao; Kato, Masaru

doi:10.1246/bcsj.70.359

Cited by 9 publications

(8 citation statements)

References 11 publications

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“…The calculation method of Ki from the data was the same that we previously reported. 18 In brief, the calculated value was obtained based on the assumption that the character of Ka to α during complexation was similar to that of Ka without PVS.…”

Section: Calculation Of Ka and Ki 18mentioning

confidence: 99%

“…Glycolchitosan also demonstrated such a linear relationship, 16 but poly(vinylamine) and poly-(ethyleneimine) never indicated a regular relationship to α. 18 This indicates that chitosans have a rigid backbone of a sugar chain, and that the effects of α and the NaCl concentration can not produce a significant conformational change. Each constant pKa at 1 M NaCl solution is listed in Table 1.…”

Section: Dissociation Constants Of Chitosansmentioning

confidence: 99%

“…Sodium PVS was prepared from potassium salt by ionexchange, as described elsewhere. 18 Sodium DBS (Wako Pure Chemicals Ind. Ltd., purity above 99%) and D-glucosamine HCl (Seikagaku Corporation Ltd.) were used without further purification.…”

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confidence: 99%

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pH-Potentiometirc Study of Polyion Complexes between Chitosan and Poly(vinyl sulfate) or Dodecylbenzene Sulfonate

Hattori

Katai

2008

ANAL. SCI.

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Polyion complexes of three chitosans with poly(vinyl sulfate) (PVS) and dodecylbenzene sulfonate (DBS) were examined by a potentiometric study that was to separately measure the pH of sample solutions individually prepared. Apparent formation constants (Ki) of ion association between the protonated amines of chitosan and the sulfates of PVS or the sulfonates of DBS were determined. The effects of pH, coexistent salt concentration, and molecular weight on the values of Ki were investigated in order to reveal the properties of the complexation. The values of Ki for chitosan-PVS were quite larger than that for chitosan-DBS. The deducing effect of the coexistent salt was strong against chitosan-PVS, but was weak against chitosan-DBS. Thus, chitosan-PVS complexes possessed a strong electrostatic binding, and chitosan-DBS complexes included a hydrophobic interaction. For chitosan-PVS complexes the effect of the coexistent salt was weaker for a high molecular weight of chitosan than for a low molecular weight.

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Section: Calculation Of Ka and Ki 18mentioning

confidence: 99%

Section: Dissociation Constants Of Chitosansmentioning

confidence: 99%

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pH-Potentiometirc Study of Polyion Complexes between Chitosan and Poly(vinyl sulfate) or Dodecylbenzene Sulfonate

Hattori

Katai

2008

ANAL. SCI.

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“…The strong association of a weak polycation with PVSK increases the apparent dissociation constant of the weak polycation, particularly, at low ionic strength. 14,15 Therefore the colloidal titration value is used at the condition at which all of the charged groups are ionized.…”

Section: Colloidal Titrationmentioning

confidence: 99%

Determination of Biguanide Groups in Polyhexamethylene Biguanide Hydrochloride by Titrimetric Methods

2003

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“…As a typical case, an aqueous solution of poly(diallyldimethyl ammonium) chloride (PDADMAC) can be titrated with an aqueous solution of potassium poly(vinyl sulfate) (KPVS) of known concentration. The reaction between oppositely charged polyelectrolytes has been studied on stoichiometry, 9,13-16 the stability constant, 17,18 and the effect of the polymerization degree. 19 A few colloidal titrations were applied to measure metal ions in hydrolyzed, polymeric forms.…”

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Colloidal Titration of Aqueous Zirconium Solutions with Poly(vinyl sulfate) by Potentiometric Endpoint Detection Using a Toluidine Blue Selective Electrode

et al. 2004

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Zirconium chemicals are used in a wide range of industries, and with advances in modern technology, the diversity of their applications has increased. 1 In particular, tetragonal zirconia is one of the most important zirconium compounds for ceramic use, with excellent mechanical properties, such as high structure toughness, strength, and hardness. 2 We have studied the effective use of some zirconium oxy-salts as a depressive and fluidizing material of ceramic slurries, 3,4 and have developed a new direct-casting method based on aqueous-acidic high solids loading alumina slurries stabilized with zirconium acetate. 5When the slurries were prepared, the concentration of zirconium oxy-salt was an important factor, and a simple and convenient determination of aqueous zirconium was required. However, the determination of zirconium is not very easy because zirconium(IV) has a marked tendency to form polynuclear hydroxy group-bridged zirconium species (polymerization) in aqueous solutions.6 Pilkington et al. mentioned that accurate results in EDTA titration of zirconium could only be obtained after zirconium ions were converted to a depolymerized form. Therefore, we studied a colloidal titration method as a means to measure the concentration of zirconium conveniently as it exists in the aqueous solution in a polynuclear configuration.Colloidal titration is an excellent measurement method for determining the concentration of natural and synthetic polyelectrolytes. [8][9][10][11][12] Titration is based on the reaction between a positively charged polyelectrolyte (polycation) and a negatively charged one (polyanion).When the charges of the polyelectrolytes are neutralized by the addition of oppositely charged polyelectrolytes, the two ployelectrolytes tend to associate and eventually precipitate. According to Terayama, who was the first proposer of colloidal titration, the colloidal titration method has been applied to several poly-charged species, such as proteins and cells. 8 However, their stoichiometries are still not clear. Regarding the reaction between oppositely charged polyelectrolytes, most of the reaction is accurately stoichiometric. As a typical case, an aqueous solution of poly(diallyldimethyl ammonium) chloride (PDADMAC) can be titrated with an aqueous solution of potassium poly(vinyl sulfate) (KPVS) of known concentration. The reaction between oppositely charged polyelectrolytes has been studied on stoichiometry, 9,13-16 the stability constant, 17,18 and the effect of the polymerization degree. 19 A few colloidal titrations were applied to measure metal ions in hydrolyzed, polymeric forms. Kikuchi and Kubota have investigated a chemical reaction of KPVS with a mixture of poly(aluminum chloride), PAC, ([Al2(OH)nCl6-n]m, n = 3, m = 2.5) as an inorganic macromolecule and [2-(diethylamino)ethyl]dextran hydrochloride.The general characteristics of the resultant polyelectrolyte complexes were also studied. 20 Tajima has reported that undeca(11-)tungstocobalt(II)phosphate, [PW11O39Co(H2O)] 5-, was a useful standa...

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Ion Association of Protonated Poly(vinylamine) and Poly(ethylenimine) with Poly(vinyl sulfate) and Dodecylbenzenesulfonate as Special Reference for Colloidal Titration

Cited by 9 publications

References 11 publications

pH-Potentiometirc Study of Polyion Complexes between Chitosan and Poly(vinyl sulfate) or Dodecylbenzene Sulfonate

pH-Potentiometirc Study of Polyion Complexes between Chitosan and Poly(vinyl sulfate) or Dodecylbenzene Sulfonate

Determination of Biguanide Groups in Polyhexamethylene Biguanide Hydrochloride by Titrimetric Methods

Colloidal Titration of Aqueous Zirconium Solutions with Poly(vinyl sulfate) by Potentiometric Endpoint Detection Using a Toluidine Blue Selective Electrode

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