The novel synthesis and characterisation of hydroxyapatite and its application in leather making / Y. Z. Wang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 4 (07-08/2018)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 102, N° 4 (07-08/2018) . - p. 181-186 Titre : The novel synthesis and characterisation of hydroxyapatite and its application in leather making Type de document : texte imprimé Auteurs : Y. Z. Wang, Auteur ; Wang Shuai, Auteur ; Z. H. Shan Année de publication : 2018 Article en page(s) : p. 181-186 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Collagène Composés inorganiques -- Synthèse Cuirs et peaux -- Propriétés mécaniques Cuirs et peaux de bovins Hydroxyapatite L'hydroxyapatite est une espèce minérale de la famille des phosphates, de formule Ca5(PO4)3(OH), usuellement écrite Ca10(PO4)6(OH)2 pour souligner le fait que la maille de la structure cristalline comprend deux molécules. L'hydroxyapatite est le membre hydroxylé du groupe apatite. L'ion OH- peut être remplacé par le fluor, le chlore ou le carbonate. L'hydroxyapatite cristallise dans le système hexagonal. La poudre d'hydroxyapatite pure est blanche. Celles que l'on trouve dans la nature peuvent cependant être de couleur marron, jaune ou verte. Stabilité thermique Tannage Tannage combiné Le tannage combiné se dit des tannages qui allient deux familles ou genre de tannage pour obtenir un résultat additionnant les qualités complémentaires des tannins mis en Å“uvre par exemple Chrome-Végétal ou Chrome-Synthétique Température de retrait Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Hydroxyapatite(HAP) has been extensively used in clinics for such as bone tissue repair because of its outstanding performance. But, whether HAP can be utilized in other fields still remains unknown, for example leather making. In the present work HAP was synthesized using a hydrothermal method with diammonium hydrogen phosphate and calcium nitrate as phosphorus and calcium precursors respectively. The Fourier transform infrared spectroscopy analysis of products shows that HAP can be produced using the wet-chemical method. The condition optimization test results indicated that high purity HAP can be obtained when the reaction was carried out at 80°C and pH11 with surfactant added and ultrasonic treatment for 8 hours. To study the effect of HAP on cow hide and whether it can be used as tanning agent, vitro and vivo tests of adding HAP into cow hide were conducted. The cow hide was first treated in the wet end process of leather making and then cut into several parts. The parts were treated using different HAP addition methods and the experimental results were compared under different conditions. Fourier transform infrared spectroscopy analysis indicated that HAP can react with the cow hide using both methods. Cow hide physicochemical properties were improved after reaction with HAP, the thermal stability was especially enhanced. The thermal shrinkage temperature of the treated hide was 78°C which was higher than the sample in the control group of 54°C. The hide tensile strength was greatly enhanced because HAP penetrated into the hide and reacted on hide collagen. So, HAP has the potential to be used as chrome-free tannage. This meant that the modification of cow hide by HAP was feasible and HAP tannage or HAP combination tannage was of practical significance. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials and equipement - HAP preparation - Tests of effects of HAP on hide collager - RESULTS AND DISCUSSION : Characterization of HAP - Effect of HAP on collagen En ligne : https://drive.google.com/file/d/19F1wl7LIKX9CFp8lVYdVfCN1OaO_9-Zr/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30900 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
20126	-	Périodique	Bibliothèque principale	Documentaires	Disponible

---

1 (1 - 1 / 1)