Basics of Gentle Cleansing

Sakamoto, Kazutami

doi:10.5107/sccj.46.7

Cited by 2 publications

(4 citation statements)

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“…Both the detergency and solubilization power of the surfactant may contribute to the desorption of the organic solvent from the activated carbon. The detergency increases up to the critical micelle concentration (cmc) of the surfactant, but when it reaches the cmc 6) , it does not change even if the surfactant concentration rises. On the other hand, the solubilization power begins to rise from a point beyond the cmc 6) .…”

Section: Discussionmentioning

confidence: 99%

“…The detergency increases up to the critical micelle concentration (cmc) of the surfactant, but when it reaches the cmc 6) , it does not change even if the surfactant concentration rises. On the other hand, the solubilization power begins to rise from a point beyond the cmc 6) . The cmc is the concentration of surfactant molecules at which molecular aggregates (micelles) are formed.…”

Section: Discussionmentioning

confidence: 99%

“…The cmc is the concentration of surfactant molecules at which molecular aggregates (micelles) are formed. The desorbed organic solvent solubilizes in a solution as well as an oil at the time of general washing 6) . The cmcs of the two surfactants used in this study are 1.2 mM for LAS and 8 mM for SDS.…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, this study aims to examine a new desorption solvent to replace carbon disulfide, focusing on surfactants that have both hydrophilic and lipophilic groups. Surfactants are used in detergents for clothing because a lipophilic material can apparently dissolve in a hydrophilic solution [6][7][8] . By applying this property of the surfactant, organic solvents adsorbed on the activated carbon can be desorbed.…”

Section: Introductionmentioning

confidence: 99%

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A new desorption method for removing organic solvents from activated carbon using surfactant

Hinoue

Ishimatsu

Fueta

et al. 2017

Journal of Occupational Health

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Objectives:A new desorption method was investigated, which does not require toxic organic solvents. Efficient desorption of organic solvents from activated carbon was achieved with an ananionic surfactant solution, focusing on its washing and emulsion action. Methods: Isopropyl alcohol (IPA) and methyl ethyl ketone (MEK) were used as test solvents. Lauryl benzene sulfonic acid sodium salt (LAS) and sodium dodecyl sulfate (SDS) were used as the surfactant. Activated carbon ( 100 mg ) was placed in a vial and a predetermined amount of organic solvent was added. After leaving for about 24 h, a predetermined amount of the surfactant solution was added. After leaving for another 72 h, the vial was heated in an incubator at 60°C for a predetermined time. The organic vapor concentration was then determined with a frame ionization detector (FID)-gas chromatograph and the desorption efficiency was calculated. Results: A high desorption efficiency was obtained with a 10% surfactant solution ( LAS 8% , SDS 2% ) , 5 ml desorption solution, 60°C desorption temperature, and desorption time of over 24 h, and the desorption efficiency was 72% for IPA and 9% for MEK. Under identical conditions, the desorption efficiencies for another five organic solvents were investigated, which were 36%, 3%, 32% , 2% , and 3% for acetone, ethyl acetate, dichloromethane, toluene, and m-xylene, respectively. Conclusions: A combination of two anionic surfactants exhibited a relatively high desorption efficiency for IPA. For toluene, the desorption efficiency was low due to poor detergency and emulsification power.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A new desorption method for removing organic solvents from activated carbon using surfactant

Hinoue

Ishimatsu

Fueta

et al. 2017

Journal of Occupational Health

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Skin Care Effect of Cleansing Agents Using Polyglycerol Fatty Acid Esters

HIGUCHI¹,

MATSUMOTO²

2022

Oleoscience

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Cleansing agents such as facial cleansers and makeup removers are required not only to have high cleansing power against excess sebum and makeup, but also to be par ticularly gentle to the skin and hypoallergenic since they are used on the face.Therefore, we are focusing on polyglycerol fatty acid esters (PGFEs), which is highly safe and widely used in leave-on type skin care products, and investigating its skin care ef fects when used as a cleansing ingredient.The results of various evaluations showed that cleaning formulations containing PGFEs didn't disrupt skin barrier functions such as intercellular lipids, and were ef fective in suppressing multiple exfoliation of stratum corneum, reducing the size of keratotic plugs and carbonylation level of stratum corneum around skin pores. This ar ticle introduces the skin care ef fects required of cleaning agents in terms of the water-holding capacity of PGFEs and its adsorption behavior on stratum corneum.

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Basics of Gentle Cleansing

Cited by 2 publications

References 1 publication

A new desorption method for removing organic solvents from activated carbon using surfactant

A new desorption method for removing organic solvents from activated carbon using surfactant

Skin Care Effect of Cleansing Agents Using Polyglycerol Fatty Acid Esters

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