Washing Efficiency Analysis Based on a Concept of Statistical Distribution

Ishikawa, Yusuke; Orito, Shintaro; Oya, Masaru

doi:10.5650/jos.55.511

Cited by 21 publications

(16 citation statements)

References 4 publications

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“…Graphically, resistance of soil against washing is taken in a horizontal axis, and density is taken in a vertical axis. In the previous paper 1) , adhesive force of soil was taken in a horizontal axis. In this paper, however, resistance of soil against washing was taken in a horizontal axis, because soil removability is also affected by an interaction between soil and substrate.…”

Section: Theorymentioning

confidence: 99%

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Statistical Analysis of Washing Efficiency for Solid Particle Soil

2007

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In a previous study, statistical method using two distributions was applied to analyze detergency of oily soil. The method uses statistical distributions of detergent power and adhesive force of soil. In this paper, this method was applied to an analysis of detergency of solid particles. Soiled cotton cloth was prepared with red iron oxide dispersion liquid in Terg-O-Tometer. Four-time consecutive washings tests were conducted with dodecyl sulfuric acid sodium salt (SDS) and alcohol ethoxylate (AE) aqueous solutions in Terg-O-Tometer. Change of removal efficiencies due to repetitive washing was utilized to seek the two distributions. Predicted removal efficiencies calculated from computer simulation corresponded to experimental values. Different adhered states of soil, prepared by varying soiling conditions, were expressed as Removal Resistance. As soiling mechanical power increased, Removal Resistance shifted toward higher adhesive force of soil and an amount of soil had also increased. Iron oxide concentration only had an affect on an amount of soil. The results showed that the method using two statistical distributions can be applied to the detergency of solid particle.

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Section: Theorymentioning

confidence: 99%

“…In a previous paper 1) , detergency of oily soil was analyzed by a concept based on statistical distribution. The concept uses two statistical distributions: adhesive force of soil and detergent power.…”

Section: Introductionmentioning

confidence: 99%

Statistical Analysis of Washing Efficiency for Solid Particle Soil

2007

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“…In those studies, oily soil and solid particle soil were washed with surfactant solution, and the results showed that experimental removal efficiencies corresponds to predicted removal efficiencies which were calculated from washing simulation using distributions of detergent power 1,2) . Practical soil component is mostly a mixture of solid particles, oily soil, protein, etc.…”

Section: Introductionmentioning

confidence: 83%

Application of Statistical Analysis to Mixed Soil Detergency

Ishikawa

Oya

2008

J. Oleo Sci.

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In previous studies, statistical method using distribution of detergent power and that of resistance of soil against washing was applied to analyze detergency of oily soil and solid particle soil. In this paper, this method was applied to an analysis of detergency of mixed soil. Artificially soiled cloth prepared by aqueous dispersion method was used as a mixed soil sample. Four-time consecutive washing tests were conducted under the same washing condition in Terg-O-Tometer using two kinds of detergent solution and distilled water. Change of removal efficiencies due to repetitive washing was used to determine the two distributions. Result shows that detergent power can be expressed as cumulative distribution function. In washing simulation using the cumulative distribution functions, the predicted removal efficiencies corresponded with experimental values. Moreover, the effect of soil aging on distribution of soil resistance against washing was found to move the distribution curve toward high resistance. These results show that the method using two statistical distributions can be applied to the detergency of mixed soil.

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“…Ishikawa 16 reported a kinetic analysis of the 4-repetition washing of oily soil on cotton cloth with an aqueous solution of alcohol ethoxylate AE , and we plotted their data on a single logarithmic chart Fig. 14 .…”

Section: Washing Test Using Commercial Detergentsmentioning

confidence: 99%

“…The data were drawn from Ishikawa's study 16) , in which a cotton cloth soiled with solvent blue 11 was washed by Terg-O-Tometer. …”

Section: Fig 12mentioning

confidence: 99%