Organic fluorosilicone modified polyacrylate emulsion finishing agent / Sui Zhihui in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 4 (07-08/2019)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 103, N° 4 (07-08/2019) . - p. 208-212 Titre : Organic fluorosilicone modified polyacrylate emulsion finishing agent Type de document : texte imprimé Auteurs : Sui Zhihui, Auteur ; San Jinglong, Auteur ; Wang Xu, Auteur ; Zu Bin, Auteur ; Cao Xiangyu, Auteur ; Qiang Xihuai, Auteur Année de publication : 2019 Article en page(s) : p. 208-212 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Copolymères Cuirs et peaux -- Finition Fluoropolymères Hydrophobie Latex Polyacrylates Polymères en émulsion Polymérisation en émulsion Résistance thermique Revêtements antisalissures Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In order to improve the hydrophobicity and applied properties of leather products, 3- (Trimethoxysilyl)propyl methacrylate (KH-570) and Dodecafluoroheptyl methacrylate (G04) were used as modified monomers preparing a fluorosilicone polyacrylate leather finishing agent by semi-continuous seed emulsion polymerisation. The structure of the prepared latex film was characterised and analysed by FTIR and XPS. The effects of the addition of silicone monomer on the latex film and the application properties were investigated by SEM and TG. The results showed that: both the organic fluorine and the silicone monomers participated in the polymerisation, and the particle size of the emulsion was 50-70nm. XPS showed that the fluorine and silicon elements in the film-air interface were 1.74% and 3.12% higher than the theoretical values. SEM showed that the surface microstructure of the latex film of the fluorosilicone copolymer emulsion was relatively rough, and the roughness was helpful to further improve the hydrophobicity and antifouling property of the finished leather. TG showed that, after the addition of silicone monomer, the heat resistance of the film was obviously improved. Compared with fluorinated polyacrylate emulsion, the contact angle of the leather sample finished by organo fluorosilicone polyacrylate emulsion to water increased about 7°. The applied properties of the finished leather were also improved. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Preparation of fluorosilicone polyacrylate - Finishing technology of leather - FTIR characterisation of polymer film - Testing of emulsion particle size - XPS analysis of latex film surface - SEM analysis of latex film - TG analysis of latex film - Contact angle of finished leather to water - Testing of the finished leather applied properties - RESULTS AND DISCUSSION : FTIR analysis of latex film - XPS analysis of latex film - Scanning electron microscopy of latex film - Measurement of contact angle of leather to water - Testing of the finished leather applied properties En ligne : https://drive.google.com/file/d/1Au_o7I11Y6vnpVSH9P51Ieebo4ZKsFs1/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32801 [article]

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Preparation and properties of nano-ZnO/organic fluorine modified polyacrylate finishing agent / Sui Zhihui in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 6 (06/2020)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXV, N° 6 (06/2020) . - p. 207-214 Titre : Preparation and properties of nano-ZnO/organic fluorine modified polyacrylate finishing agent Type de document : texte imprimé Auteurs : Sui Zhihui, Auteur ; San Jinglong, Auteur ; Xuedong Wu, Auteur ; Jingbin Zhang, Auteur ; Lingfang Sun, Auteur Année de publication : 2020 Article en page(s) : p. 207-214 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Angle de contact Cuirs et peaux -- Finition Cuirs et peaux -- Propriétés mécaniques Essais de résilience Essais dynamiques Fluor Fourier, Spectroscopie infrarouge à transformée de Humidité -- Absorption:Eau -- Absorption Latex Nanoparticules Oxyde de zinc Polyacrylates Potentiel zeta Résistance à la déchirure Spectroscopie de photoélectrons Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : A nano-ZnO/organic fluorine-modified polyacrylate leather finishing agent was prepared using a mixture of a Silyl-modified nano-ZnO, dodecafluoroheptyl methacrylate (DFMA), methyl methacrylate (MMA) and butyl acrylate (BA) as raw materials. A semi-continuous seeded emulsion polymerization followed. The overall research objective was to improve the bacteriostatic, hydrophobicity and anti-aging properties of leather articles. The structure of the composite emulsion and its film were characterized and analyzed by FT-IR, TEM and XPS. The results showed that the latex particles had an obvious core-shell structure, a smooth surface and were monodisperse. The particle size of the emulsion ranged between 30 and 50 nm. The average value of Zeta potential was -40.1 mV which signified a good emulsion stability. The composite emulsion and its film had good UV resistance and water resistance. When the content of organic fluorine in the film was a maximum 20 %, the contact angle of a water drop on the finished leather, tensile strength and tear strength were 133.48°, 620 N and 61 N, respectively. When the content of nano-ZnO in the film was 1.0%, the average width of antibacterial band of finished leather was 2.1 mm. The finished leather also demonstrated a good anti-aging property. Note de contenu : - MATERIALS AND METHODS : Materials - Modification of nano-ZnO - Preparation of nano-ZnO/organic fluorine-modified polyacrylate emulsion - Finishing process of leather - CHARACTERIZATION AND PERFORMANCE MEASUREMENTS : Fourier transform infrared spectra (FT-IR) analysis - Particle size and zeta potential of composite emulsion - Morphology of latex particles (TEM) - XPS analysis of latex film surface - Water absorption measurement of latex film - UV resistance measurement of composite emulsion - EDS-mapping analysis of finished leather - The contact angle measurement of leather to water - Measurement of application properties - RESULTS AND DISCUSSION : FT-IR analysis - Particle size distribution and zeta potential of emulsion - Morphological analysis of emulsion partifles - XPS analysis of latex film - Water absorption of latex film - UV transmittance of composite emulsion - EDS analysis of leather surface - Bacteriostatic property of the finished leather - Contact angle of leather to water - Strength test of leather - Anti-aging test of leather - Physical performance DOI : https://doi.org/10.34314/jalca.v115i6.3823 En ligne : https://drive.google.com/file/d/1zvX5ebHIRemL_rlmmM5UMHqq_IBQQ7dE/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34322 [article]

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