Study on the absorption of tar components in cigarette smoke by collagen fibers / Hiroshi Okamura in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXVII (Année 1972)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXVII (Année 1972) . - p. 69-83 Titre : Study on the absorption of tar components in cigarette smoke by collagen fibers Type de document : texte imprimé Auteurs : Hiroshi Okamura, Auteur ; Kunio Shirai, Auteur Année de publication : 1972 Article en page(s) : p. 69-83 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acétates Collagène Coton Le coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles). Etudes comparatives Fibres polyesters Formaldéhyde Fumée de cigarette et constituants Goudron -- Absorption Laine Rayonne Soie et constituants Tannage au chrome Tannage synthétique Tannage végétal Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The absorptions of tar components in cigarette smoke by collagen, Vinylon, Tetron (polyester), silk, cotton, wool, acetate, and rayon fibers were compared. Animal fibers, such as collagen, silk, and wool, showed a remarkably high absorption, while synthetic fibers, such as Tetron and Vinylon, had the lowest. This phenomenon was correlated with water vapor absorbability of the fibers mentioned above. The absorption of tar by collagen fibers was improved by an increase in moisture content of the fibers and by an àkali pretreatment of the fibers. However, all tanning treatments reduced absorption of tar; the reduction was greatest with chrome tanning and least with vegetable tanning, formaldehyde tannage giving an intermediate value. Note de contenu : - EXPERIMENTAL : - Preparation and purification of crude collagen fiber and hide powder - Alkali pretreatment of collagen fiber - Modification of colalgen - Adjustment of moisture content of collagen fiber - Procedure for absorption of tar - RESULTS AND DISCUSSION : - Comparison of the absorption of tar by collagen fibers with that by other fibers - Comparison of the absorption of tar by collagen with that of commercial acetate filter - Effect of moisture content on the absorption of tar by collagen fibers - Change in the absorption of tar after alkali pretretment of collagen fibers - Absorption of tar by modified collagen fibers - Table 1 : Comparison of the absorption of tar by various types of natural fibers - Table 2 : Comparison of the absorption of tar by various types of artificial fibers - Table 3 : Equilibrium moisture contents of various types of fibers (20°C, 65 % R.H.) - Table 4 : Comparison of the absorption of tar by various types of collagen fibers and by a commercial cigarette filter element (acetate) - Table 5 : relationship between the moisture content and the capacity for absorption of tar of collagen fibers - Table 6 : Relation between alkali pretreatment and the absorption of tar by collagen fibers - Table 7 : Influence of an alkali pretreatment on the properties of collagen fibers - Table 8 : Change in the absorption of tar after modification of collagen fibers with tanning materials En ligne : https://drive.google.com/file/d/1vMAYV_F3f4RFLouwp05kZYL24Sy_jTwA/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41541 [article]

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