کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10375032 | 880030 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hair protein removal by sodium dodecyl sulfate
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
شیمی کلوئیدی و سطحی
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چکیده انگلیسی
The effect of sodium dodecyl sulfate (SDS) on protein loss was studied. Three kinds of human hair were tested by rubbing or immersion in water or immersion in SDS solution, at 25, 40 and 70 °C. Under friction, hair treated with SDS solution loses seven times more protein than in water, while by immersion, protein loss is roughly two times higher in SDS than in water. Protein loss increases at higher temperatures. Estimated activation energy values for protein loss by immersion are 69 ± 22 kJ molâ1 for blended brown hair; 40 ± 12 kJ molâ1 for blond hair (tip-end region) and 61 ± 4 kJ molâ1 for blond hair (root-end region) for samples treated in water, while 53 ± 8, 7 ± 5 and 32 ± 8 kJ molâ1 were the corresponding activation energy values for samples treated in 5% SDS solution. These values indicate that protein loss is mainly a diffusion-controlled process. The more damaged the hair, the lower the activation energy and the higher the protein loss. From these data, it can be estimated that daily care shampooing at room temperature will cause opacity and combing difficulties in 1 year and split ends after 3 years by removal of all cuticle layers.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces B: Biointerfaces - Volume 41, Issue 1, 10 March 2005, Pages 7-14
Journal: Colloids and Surfaces B: Biointerfaces - Volume 41, Issue 1, 10 March 2005, Pages 7-14
نویسندگان
Rita de Cássia Comis Wagner, Inés Joekes,