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Correlative studies on the properties of rubber seed and soybean oil-based alkyd resins and their blends / Ikhazuagbe H. Ifijen in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 2 (03/2021)
[article]
Titre : Correlative studies on the properties of rubber seed and soybean oil-based alkyd resins and their blends Type de document : texte imprimé Auteurs : Ikhazuagbe H. Ifijen, Auteur ; Hamilton D. Odi, Auteur ; Muniratu Maliki, Auteur ; Stanley O. Omorogbe, Auteur ; Aireguamen I. Aigbodion, Auteur ; Esther U. Ikhuoria, Auteur Année de publication : 2021 Article en page(s) : p. 459-467 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Formulation (Génie chimique)
Huile de graine de caoutchouc
Huile de soja
Mélanges (chimie)
Polyalkydes
Polyesters
Polymères -- Synthèse
Revêtements organiques
Rhéologie
ViscositéIndex. décimale : 667.9 Revêtements et enduits Résumé : This study aims at synthesizing alkyd resins from rubber seed oil (RSO), soybean oil (SBO), and their blends via the monoglyceride route. Oil extracted from rubber seeds was blended with soybean oil at various blending ratios (80:20, 70:30, 50:50, 30:70, and 10:90). Thereafter, the blends were employed in the synthesis of polyesters (alkyd resins) via alcoholysis technique. The alkyd samples synthesized from the RSO, SBO, and their respective blends were characterized for comparative purpose. The RSO-/SBO-based alkyds and aforementioned blends have iodine values of 157.90/142.00, 152.44, 149.90, 143.16, 142.26, and 142.41 gI2/100 g and saponification values of 216.21/228.61, 203.67, 171.04, 161.97, 142.89, and 135.62 mgKOH/g, respectively. The drying property (set-to-touch time and the tack free) of the 100% RSO-based alkyd resin did not experience any significant improvement as the blending proportion of SBO in RSO increases. The tack-free and dry-through times for the blends were estimated to be around 129–133 and 236–243 min, respectively. Huggins and Kraemer viscosity relationship was used to extrapolate the intrinsic viscosities of the RSO- and SBO-based alkyds and their corresponding blends. The blends showed resistance to brine, water, and acid. However, only some exhibited fair resistance to alkali. The results from the investigation revealed that the alkyds prepared using a blend of RSO/SBO oil possess coating properties whose values are comparable to those of commercial polyesters. However, the studied SBO cannot be considered as good blending oil with RSO for the preparation of alkyd for the improvement of drying properties. Note de contenu : - MATERIALS AND METHODS : Synthesis of alkyd resin samples - Characterization of the alkyd samples - Chemical constituent of RSO and SBO - Preparation of alkyd coatings for performance characteristics - Viscosity measurement
- RESULTS AND DISCUSSION : Physiochemical characteristics of the alkyd samples - Drying characteristics of the alkyd films - Viscosity analysis
- Table 1 : Formulation of the synthesized alkyd resin
- Table 2 : Physiochemical properties of the RSO and SBO
- Table 3 : Physico-chemical properties of RSO and SBO alkyd resin
- Table 4 : Drying schedule for formulated alkyd resin
- Table 5 : Chemical resistance of the alkyd film to different solvent media
- Table 6 : Estimated solution parameters of alkyd samples
- Scheme 1 : Monoglyceride process of rubber seed oil-modified alkyd synthesis
- Scheme 2 : Monoglyceride process of soybean oil-modified alkyd synthesisDOI : https://doi.org/10.1007/s11998-020-00416-2 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00416-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35607
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Code-barres Cote Support Localisation Section Disponibilité 22701 - Périodique Bibliothèque principale Documentaires Disponible Synthesis of sulfonated Sesamum indicum L. seed oil and its application as a fatliquor in leather processing / Adachukwu N. Nkwor in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 3 (Année 2021)
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Titre : Synthesis of sulfonated Sesamum indicum L. seed oil and its application as a fatliquor in leather processing Type de document : texte imprimé Auteurs : Adachukwu N. Nkwor, Auteur ; Pius O. Ukoha, Auteur ; Ikhazuagbe H. Ifijen, Auteur Année de publication : 2021 Article en page(s) : 13 p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation
Chimie analytique
Composés organiques -- Synthèse
Cuirs et peaux -- Propriétés mécaniques
Emulsions
Extraction (chimie)
Huile de sésame
Produits de nourriture du cuir
SulfonationIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Fatliquor is an oil-in-water emulsion that improves the physical properties of leather such as tensile strength, flexibility, and softness by lubricating the leather fibres. Sulfonated Sesamum indicum oil was synthesized, characterized, and examined for consideration as a substitute for imported fatliquor in Nigeria. The sulfonation of the oil was confirmed by the significant observations made in the FTIR, 1H NMR, 13C NMR, and 13C NMR DEPT analysis results. A remarkable difference was observed in the physicochemical properties results of both unsulfonated and sulfonated oils. The sulfonated sesame fatliquor was applied onto goatskin and compared with a commercial sulfated fatliquor in the processing of shoe upper leather using standard methods. The average results for tensile strength, double edge tear, elongation, and softness results for the commercial and synthesized fatliquors are as follows: 14.27 N/mm2; 13.77 N/mm2, 50.61 N; 60.11 N, 38.06%; 54.28%, 25.2; 25.0. A comparable level of lubrication of the leather treated with the sulfonated Sesamum indicum oil and that treated with the commercial leather fatliquor was revealed by the Sudan IV stain test as well as scanning electron microscopy analysis results. Experimental analyses, therefore, show that the as-synthesized sulfonated Sesamum indicum oil could be considered as a substitute for imported fatliquor in the leather industry. Note de contenu : - MATERIALS AND METHODS : Materials - Sample seed preparation - Extraction of Sesamum indicum oil - Sulfonation reaction procedure - Characterizations of S. indicum oil - Leather shoe upper manufacturing process - Strength/mechanical/physical properties of the shoe upper leathers
- RESULTS AND DISCUSSION : Fatty acid composition - Sulfonation reaction process - Physiochemical properties of the oil - Structural analysis - NMR spectral characterisation - Stability of the 10% Fatliquor emulsions - Mechanical properties results
- Table 1 : Fatliquoring process for shoe upper leather manufacture
- Table 2 : Fatty acid profile of s. indicum oil
- Table 3 : Physicochemical properties of unsulfonated and sulfonated s. indicum oil
- Table 4 : Evaluation of the ft-ir spectra
- Table 5 : 1h nmr evaluation of unsulfonated and sulfonated oils
- Table 6 : Stability of 10% sulfonated s. indicum fatliquor towards pickle liquor, tan liquor and hard water
- Table 7 : Tensile strength, elongation at break and double edge tear results
- Table 8 : Strength of grain surface of leather test piecesDOI : https://doi.org/10.1186/s42825-021-00053-4 En ligne : https://link.springer.com/content/pdf/10.1186/s42825-021-00053-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37542
in JOURNAL OF LEATHER SCIENCE AND ENGINEERING > Vol. 3 (Année 2021) . - 13 p.[article]Exemplaires
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