Preparation and properties of corn starch/polyacrylate emulsion finishing agent / Li Zeyang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 108, N° 3 (05-06/2024)

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 108, N° 3 (05-06/2024) . - p. 122-126 Titre : Preparation and properties of corn starch/polyacrylate emulsion finishing agent Type de document : texte imprimé Auteurs : Li Zeyang, Auteur ; Sui Zhihui, Auteur ; Zhang QI, Auteur ; Deng Lihua, Auteur ; Cao Xiangyu, Auteur ; Fang Hu, Auteur Année de publication : 2024 Article en page(s) : p. 122-126 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acrylate de butyle Amidons Caractérisation Chimie analytique Croûte (cuir) On entend par "cuir en croûte" des cuirs ayant subi les opérations jusqu'au tannage, à l'exclusion de toute opération de corroyage ou de finissage, mais qui, par opposition aux wet-blue ont été séchés. Cuirs et peaux -- Finition Emulsions Maïs et constituants Méthacrylate de méthyle Polyacrylates Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Corn starch modified polyacrylate emulsion was prepared by semi-continuous seed emulsion polymerization with methyl methacrylate (MMA), butyl acrylate (BA) and oxidized starch (OSt) as the main raw materials and was subsequently used for leather finishing. The structure of starch/polyacrylate emulsion film was characterized by FT-IR, XPS and 1HNMR and the properties of leather coated with the emulsion were tested. The results showed that after corn starch was oxidized, the oxidized starch reacted with acrylate monomers, and the polyacrylate emulsion modified using oxidized starch was successfully prepared. Compared with a polyacrylate emulsion, the particle size distribution of modified composite emulsion is more concentrated. After finishing with polyacrylate emulsion containing oxidized starch, the leather was folded 20,000 times without developing cracks; In the wear resistance test, the gray scale of dry-wiped interlining cloth increased from 4.0 to 5.0, and the gray scale of wet-wiped interlining cloth increased from 3.5 to 4.5 ; The softness increased from 4.35 mm to the highest value at 5.23 mm; The tensile strength increased from 523N to 581N; The yellowing resistance is also obviously improved. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Preparation of oxidized starch - Preparation of polyacrylate emulsion containing oxidized starch - Particle size analysis of emulsion - FTIR characterization of latex film - XPS characterization of latex film - 1H-NMR analysis - Testing of the crust leather applied performance - RESULTS AND DISSCUSION : FT-IR analysis - XPS analysis - 1HNMR analysis - Particle size distribution test of emulsion - Testing of the crust leather’s applied performance - Table 1 : Element content on the surface of latex film - Table 2 : Test of latex film performance - Table 3 : Testing of the finished leather applied performance Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41137 [article]

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