Determination of the Diffusion Coefficient and Reaction Constant of Reactive Dyes

Karasaua, Mikio; Choji, Noriko; Sasaki, Hiroaki; Sekido, Minoru

doi:10.2115/fiber.29.t14

Cited by 3 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(3) has an asymptote described by eq. (13), which has no dependence on t and is shown as a chain line in Figure 2:…”

Section: Diffusion Profilesmentioning

confidence: 99%

“…The first study which obtained the diffusion coefficients from the diffusion profile of reactive dye in cellulose has recently been reported by Karasawa et al 13 However, they treated the diffusion profile of "active" species. The theoretical distribution of immobilized dye, which was practically of importance in reactive dyeing, has not yet been reported.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Diffusion with simultaneous reaction of reactive dyes in cellulose

Motomura

Morita

1977

J of Applied Polymer Sci

View full text Add to dashboard Cite

SynopsisThe theoretical equations which described the concentration profile of immobilized species of reactive dyes in the substrate were derived from the diffusion equation with the chemical reaction of first-order or pseudofirst-order. The theoretical profiles in the substrate described by the equations were discussed. The larger the diffusion coefficient D of active species and the smaller the reaction rate constant h , the deeper is the penetration of the immobilized and active species of reactive dyes into the substrate. The method of estimating D and k from the diffusion profiles of both species obtained by means of the method of the cylindrical cellophane film roll was described.The diffusion coefficients of the hydrolyzed species of C.I. Reactive Orange 1 and Red 1 were nearly constant in all the pH values examined. The concentration profiles of both the species of Orange 1 at pH 8.8 were identical with the theoretical ones; while the profiles of immobilized species of Red 1 at pH 10 and of Orange 1 a t pH 12 agreed with the theoretical ones and those of active species did not because of the hydrolysis. The diffusion coefficients of active species of these dyes a t these pH ranges were smaller than those of the hydrolyzed species.

show abstract

“…(3) has an asymptote described by eq. (13), which has no dependence on t and is shown as a chain line in Figure 2:…”

Section: Diffusion Profilesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Diffusion with simultaneous reaction of reactive dyes in cellulose

Motomura

Morita

1977

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…Therefore, few reports are available. Karasawa et al (1973) and Motomura and Morita (1977) estimated the reaction rate constant and the diffusion coefficient of dye for a system of reactive dye-cellulose film on the basis of the pore diffusion model accompanied by an irreversible reaction of the first order with respect to active dye concentration. Motomura and Morita (1979) investigated further by taking competitive hydrolysis of dye into consideration.…”

Section: Historical Backgroundmentioning

confidence: 99%