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Application of acrylic resin coating agent modified by nano SiO2 / Ma Jianzhong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 90, N° 5 (09-10/2006)
[article]
Titre : Application of acrylic resin coating agent modified by nano SiO2 Type de document : texte imprimé Auteurs : Ma Jianzhong, Auteur ; Zhang Zhijie, Auteur ; Liu Lingyun, Auteur ; Hu Jing, Auteur Année de publication : 2006 Article en page(s) : p. 188-192 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Air
Composites
Cuir -- Nettoyage
Cuirs et peaux -- Finition
Cuirs et peaux -- Propriétés mécaniques
Dioxyde de silicium
Formulation (Génie chimique)
Nanoparticules
Perméabilité
Polyacryliques
Résistance à l'abrasion
Revêtements organiques
Vapeur d'eauIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : An acrylic resin and an acrylic-resin/nano-SiO2 composite prepared as coating agents were applied in leather finishing and various properties of the finished leathers were determined. The results show that the physicalmechanical properties and cleaning properties of the leather samples finished with the acrylic-resin/nano-SiO2 composite increase noticeably. As examples, water vapour penetration and air permeability improved by 11.5% and 15.4%, dry rub fastness and folding strength [flexing] of the leather finished with the composite resin were also, to a degree, superior to that finished by the acrylic resin. The surface morphology observed by SEM (scanning electron microscope-energy spectrum of X-ray analysis) and AFM (atomic force microscope) indicated that the surface of the leather finished with the composite resin is smoother than that of leathers finished with the acrylic resin. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Instruments - Synthesis of nano composite acrylic resin - Application in leather finishing - Tests of the finished leather’s performances
- RESULTS AND DISCUSSION : Air permeability of the finished leathers - Water vapour penetration of the finished leathers - Dry and wet rub fastness of the finished leather samples - Folding endurance - Observation of the finished leathers by SEM-EDS - Observation of the finished leathers by AFM
- Table 1 : The formulae for finishing
- Table 2 : Air permeability of different leather samples
- Table 3 : Water vapour penetration of different leather samples
- Table 4 : Grades of dry and wet rub fastnessEn ligne : https://drive.google.com/file/d/1JicRME_BV_7V1HagPpLnWEYMWD296N8a/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39054
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 90, N° 5 (09-10/2006) . - p. 188-192[article]Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Re-utilisation of biomass resources : preparation and application of an organic fertiliser based on waste cattle hair from tannery / Wang Yi in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 105, N° 2 (03-04/2021)
[article]
Titre : Re-utilisation of biomass resources : preparation and application of an organic fertiliser based on waste cattle hair from tannery Type de document : texte imprimé Auteurs : Wang Yi, Auteur ; Ouyang Mai, Auteur ; Luo Jianxun, Auteur ; Zhang Zhijie, Auteur ; Du Manyi, Auteur ; Wu Peijun, Auteur Année de publication : 2021 Article en page(s) : p. 90-94 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Biomasse
Bisulfite de sodium
Déchets organiques -- Recyclage
Engrais organiques
Fermentation
Hydrolyse
Hydroxyde de sodiumL'hydroxyde de sodium, appelé également soude caustique7, est un corps chimique composé minéral de formule chimique NaOH, qui est à température ambiante un solide ionique. Fusible vers 318 °C, il se présente généralement sous forme de pastilles, de paillettes ou de billes blanches ou d'aspect translucide, corrosives et très hygroscopiques. Il est très soluble dans l'eau et légèrement soluble dans l'éthanol.
La solution d'hydroxyde de sodium, souvent appelée soude, est une solution aqueuse transparente. Concentrée, elle est corrosive et souvent appelée lessive de soude.
Les propriétés chimiques de l'hydroxyde de sodium sont surtout liées à l'ion hydroxyde HO- qui est une base forte. En outre, l'hydroxyde de sodium réagit avec le dioxyde de carbone (CO2) de l'air et se carbonate.
La solubilité de la soude caustique dans l'eau augmente avec la température, à pression constante ou ambiante.
Recyclage (déchets, etc.)
Système pileuxIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : In order to make effective use of cattle hair from a de-hairing process with hair-saving methods during the process of cleaner production in leather industry, complex oxidising materials (ammonium persulfate and hydrogen peroxide) were employed to oxidise and change the colour, structure of waste cattie hair. Then, sodium hydroxide and sodium bisulfite were employed to hydrolyse the de-coloured and de-structured cattle hair. The cattle hair hydrolysate was concentrated and was further fermented using a compound enzyme (neutral protease and pancreatin) so as to make it into an organic fertiliser.
Comparing the colour and the structure of the cattle hair, the best conditions of the reaction temperature, the dosage of ammonium persulfate and hydrogen peroxide solution and reaction time for 20g dried cattle hair were confirmed to be 75°C, 4g, 9g and 60 minutes. when the dosage of sodium hydroxide, sodium bisulfite, and reaction time were 8g, 2g and 45 minutes, the hydrolysis rate of the cattle hair and the content of the cattle hair hydrolysate was 95.4% and 17.6%. The solids content of the concentrated cattle hair hydrolysate is 30.8%. when the fermenting conditions are those of 0.15% neutral protease, 0.15% pancreatin and 3 hours, the nitrogen content of the fermented liquid is 338.5mg/L and was prepared as an organic fertiliser that contributes to the growth of plants, which can realise the utilisation of waste cattle hair from the leather industry.Note de contenu : - EXPERIMENTAL PROCEDURE : Materials - Oxidation of waste cattle hair from tannery - Hydrolysis of oxidised cattle hair and concentration of hydrolysate - Fermentation of the concentrated hydrolysate of waste cattle hair - Applicationof hydrolysate and fermentation liquor of waste cattle hair
- RESULTS AND DISCUSSION : Analysis of oxidised waste cattle hair - Analysis of hydrolysis and concentration of waste cattle hair - Analysis of fermentation of concentrated hydrolysate of waste cattle hair - Analysis of the growth of plant using different fertilisers
- Table 1 : Parameters of orthogonal experiment of oxidising waste cattie hair
- Table 2 : Experimental scheme of oxidized experiment of waste cattle hair with (NH4)2S208 and F1202
- Table 3 : Parameters of orthogonal experiment of hydrolysing waste cattie hair
- Table 4 : Experimental scheme of hydrolysis experiment of waste cattie hair with NaOH and NaHSO3
- Table 5 : Parameters of orthogonal experiment of fermenting the hydrolysate
- Table 6 : Experimental scheme of fermentation experiment of concentrated hydrolysate
- Table 7 : Results of oxidation experiment of waste cattie hair with (NH4)2S208 and H202
- Table 8 : Results of hydrolysis experiment of waste cattie hair with NaOH and NaHSO3
- Table 9 : Results of fermentation experiment of concentrated waste cattie hair hydrolysate
- Fig. 1 : Appearance of waste cattle hair
- Fig. 2 : Appearance of oxidised and decoloured cattle hair
- Fig. 3 : SEM photograph of waste cattle hair
- Fig. 4 : SEM photograph of oxidised and decoloured cattle hair
- Fig. 5 : Photos of carrot growing for 30 days
- Fig. 6 : Photos of lettuce growing for 20 days
- Fig. 7 : Photos of pak choi groing for 15 daysEn ligne : https://drive.google.com/file/d/1RP9r9j4h5adBa3mNWkwzTfQloZAUlYUC/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35547
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 105, N° 2 (03-04/2021) . - p. 90-94[article]Réservation
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