High performance leather based on in situ formation of reduced graphene oxide in chrome tanning / Xinle Yang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 5 (05/2022)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVII, N° 5 (05/2022) . - p. 206-211 Titre : High performance leather based on in situ formation of reduced graphene oxide in chrome tanning Type de document : texte imprimé Auteurs : Xinle Yang, Auteur ; Yanchun Li, Auteur ; Mao Yang, Auteur ; Xugang Dang, Auteur ; Shan Cao, Auteur Année de publication : 2022 Article en page(s) : p. 206-211 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation Cuirs et peaux Cuirs et peaux -- Propriétés mécaniques Matériaux hautes performances Oxyde de graphène Tannage au chrome Température de retrait Thermocinétique Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : A novel method of high performance leather prepared via in situ reduction of graphene oxide after tanning was proposed in this research. First, nano-graphene oxide (GO) was prepared by an improved Hummers method. Then, the prepared GO was characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). Finally, GO was added during the chrome tanning process, and GO was reduced by ascorbic acid after the chrome tanning was completed. Moreover, the shrinkage temperature, tensile strength, tear strength and thermal conductivity of the finished leather were investigated. The results showed that the absorption of chrome tanning agent was significantly improved by the addition of GO. The tensile strength, tear strength, and the thermal conductivity of the resulted leather obviously surpassed the leather tanned by chrome tanning agent. Specifically, the tensile strength and tear strength of the leather reached 21.25 MPa and 163.95 N·mm-1 , respectively, when the amount of reducing agent was ten times the amount of GO. A combination of the tanning of leather and the in situ reduction of GO is expected to become a new processing method for preparation of high performance. Note de contenu : - EXPERIMENTAL : Materials and chemicals - Preparatio of GO - Tanning process - Reduction of GO - Characterization - Physicochemical properties of leather - RESULTS AND DISCUSSION : Infrared analysis of GO - XRD analysis of GO - Morphology analysis - XPS analysis of GO - Physical - mechanical properties testing of leather - Thermal conductivity testing of leather - Table 1 : Experimental scheme for in-situ reduction of GO - Table 2 : Chemical composition of grpahite and GO - Table 3 : Physical - mechanical properties of leather DOI : https://doi.org/10.34314/jalca.v117i5.4917 En ligne : https://drive.google.com/file/d/19dT_nj0m_Vl53ZtahY9OQbpl-TY3vzkU/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37571 [article]

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