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Auteur Mariliz Gutterres
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Federal University of Rio Grande do Sul - Porto Alegre - Brazil
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Preparation of polyols and polyurethane foams from olein by-product of tanning industry / Manoel Rodrigues da Silva in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 11 (11/2022)
[article]
Titre : Preparation of polyols and polyurethane foams from olein by-product of tanning industry Type de document : texte imprimé Auteurs : Manoel Rodrigues da Silva, Auteur ; Joao Antonio Pessoa da Silva, Auteur ; Cesar Liberato Petzhold, Auteur ; Nilo Sérgio Medeiros Cardozo, Auteur ; Mariliz Gutterres, Auteur Année de publication : 2022 Article en page(s) : p. 489-497 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Formulation (Génie chimique)
Mousses (matériaux) -- Propriétés mécaniques
Mousses plastiques
Mousses plastiques -- Propriétés physiques
OléineL'oléine ou trioléine est un triglycéride naturellement présent dans les huiles et les matières grasses solides végétales. Sa densité est de d = 0,89 et sa formule brute est : C57H104O6
Il s'agit du triester de l'acide oléique avec le glycérol (propan-1,2,3-triol).
L'oléine est utilisée pour la fabrication du savon de marseille suivant la réaction de saponification :
C57H104O6 +3(Na+ + HO-)= 3(C17H33-CO2- , Na+) + CH2OH-CHOH-CH2OH (Wikipedia)
Polymères -- Synthèse
Polyols
PolyuréthanesIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Olein produced from the solid residues of the tanning industry is already employed as raw material to obtain greasing oil for leather. However, new applications for this product may be advantageous regarding environmental impact and sustainability of this industry. In this work, flexible polyurethane foams (FPUFs) were prepared from polyols obtained from olein. A polyol from olein was prepared through alkaline glycerolysis. The glycerolysis conditions of temperature, glycerol/olein molar ratio, amount of catalyst and reaction time were optimized using a 24 factorial design, resulting in an olein polyol containing around 75% of monoacylglycerols, hydroxyl value (388.68±0.40 mg KOH.g-1), and hydroxyl functionality of 2.89. FPUFs were prepared at NCO/OH ratios of 1.2:1 and 1.3:1, using an aliphatic hexamethylene diisocyanate trimer and water as foaming agent. The foams were characterized through FTIR, thermogravimetry, morphology, extractable materials, and mechanical properties. Characteristics urethane/urea groups formation were verified by FTIR as well as typical mass loss steps in the thermal decomposition curves. The foams morphology showed a structure composed mainly for polygon-type closed-cells. The obtained FPUFs presented a content of extractable materials lower than 3%. The mechanical properties of the foams were dependent on the NCO/OH ratio, and the foam prepared at the ratio of 1.2:1 stood out as a potential material to be used in the production of mattresses. This study demonstrated the feasibility of transforming olein, a solid residue of the tanning industry, as a precursor to prepare PU foams, which may be a promising material for mattress applications, considering the observed features. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of the olein polyols (OP) - Preparation of the flexible polyurethane foams (FPUF) - Physical and mechanical properties and extractable material of FPUFs - Analytical methods
- RESULTS AND DISCUSSION : Glycerolysis of olein - Characterization of olein and olein polyol 2 (OP2) - Characterization of the produced flexible polyurethane foams (FPUFs) - Structural characterization - Ecxtractable material - Physical and mechanical properties
- Table 1 : FPUFs formulations
- Table 2 : Experiments performed according to a 2 factorial design and the respective results of yield
- Table 3 : MAG, DAG, and TAG yields : effects of the significant factors (p<0.05) from the ANOVA on data of table 1
- Table 4 : Properties of olein and OP2
- Table 5 : Extractable materials, physical and mechanical properties of the prepared FPUFsDOI : https://doi.org/10.34314/jalca.v117i11.6295 En ligne : https://drive.google.com/file/d/18OoRZqMgxzEjPqzOIHMgeMS7ElvUOiVr/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38342
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVII, N° 11 (11/2022) . - p. 489-497[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23705 - Périodique Bibliothèque principale Documentaires Disponible Processing of amazon catfish skins - dourada (brachyplathstoma sp.) and piraiba (brachyplatystoma sp.) / Joao Antonio Pessoa da Silva in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 4 (07-08/2017)
[article]
Titre : Processing of amazon catfish skins - dourada (brachyplathstoma sp.) and piraiba (brachyplatystoma sp.) Type de document : texte imprimé Auteurs : Joao Antonio Pessoa da Silva, Auteur ; Crislaine Fabiana Bertoldi, Auteur ; Aline de Cassia Campos Pena, Auteur ; Manoel Rodrigues da Silva, Auteur ; Mariliz Gutterres, Auteur Année de publication : 2017 Article en page(s) : p. 190-194 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse thermique
Cuirs et peaux -- Analyse
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux de Poissons
Déchets organiques -- Recyclage
Microscopie
Tannage au chromeIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this work, Piraiba and Daurade skin wastes were used for leather processing. They were initially stripped and characterized by their percentage composition. The results showed that pH, differential pH cipher [SLC13/ WC 111 BS 1309:9 — Determination of pH value and Difference Figure of an Advenus Extract], chromium content and mechanical properties after chromium tanning were in accord with leather specifications. Further results demonstrate that the tensile and tear strength of the leather varied depending on the direction of the collagen fibres. Microscopic analysis allowed us to verify that the fibre structure is interlaced and compact. This work also determined that the shrinkage temperatures, as measured by DSC were 98.24 and 104.06°C for Dourada and Piraiba leather, respectively, In conclusion, the characterization demonstrated the feasibility of using waste skins of Piraiba and Daurade for leather processing, adding value to a sub-product of fish processing. Note de contenu : - Skin preparation and leather processing
- TABLES : 1. Formulation for processing fishkins - 2. Composition of fishskins - 3. Properties of fish leathers - 4. Physical and mechanical properties of fish leathers - 4. Thickness and tear strengthof fish leathers
- FIGURES : 1. Optical microscopy of the Dourada and Piraiba leather surface observed in stereomicroscope (70x) - 2. DSC curves of the fish leathersEn ligne : https://drive.google.com/file/d/1Wu55cCDvpoMitd1qC7tvylOUTsiuAO_v/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28893
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 101, N° 4 (07-08/2017) . - p. 190-194[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19176 - Périodique Bibliothèque principale Documentaires Disponible Reduction of water demand and treatment cost in tanneries through reuse technique / Mariliz Gutterres in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIII, N° 4 (04/2008)
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Titre : Reduction of water demand and treatment cost in tanneries through reuse technique Type de document : texte imprimé Auteurs : Mariliz Gutterres, Auteur ; J. O. Trierweiler, Auteur ; L. S. Severo, Auteur ; P. M. Aquim, Auteur ; J. B. Passos, Auteur Année de publication : 2008 Article en page(s) : p. 138 - 143 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Tannery industries employ great amounts of water; because most of their processes occur in an aqueous medium. This leads to the generation of high wastewater flowrates which will have to be treated due to the relatively high concentrations of some pollutant species. The attending paper presents this problematic throughout a case study in Rio Grande do Sul, state of Brazil. It establishes the water consumption in each stage of leather processing. In order to achieve the reduction in the total water consumption, herein it is proposed the water reuse technique in some stages of the process. Experimental results, on industrial scale, are shown so that the methodology is demonstrated to be successful. Water reuse reduces the load of the wastewater treatment plant as well as it reduces the costs. Research on water demand in tanneries defines water consumption for each stage: beamhouse, tanning and pos-tanning operations. It is known that tanneries make use of water in an uncontrolled manner, usually higher than actually would be necessary. Additional, most of the stages use fresh waters from artesian wells or from rivers. Recycling technique is current in liming operation. This paper shows that reuse and recycle techniques could be applied for other operations. Alternatives of water reuse were evaluated through the analysis of the process's wastewater to estimate the concentration of some contaminant parameters. The study was carried out on industrial scale. These parameters are indicators to evaluate the water quality according with the objectives of the reuse system. During analysis, it was tested reuse in the pre-deliming and deliming stages, using 100% of the effluent from bating washing. The parameters analyzed in the process's wastewater with reuse practice did not present any considerable difference when one compared with the conventional process. It demonstrates the viability of reuse practice in tannery industry. This study is of great importance to the environmental and to tannery industry, because the reuse technology aims at a solution to water minimization that results in the maximum environmental protection and cost reduction. En ligne : https://drive.google.com/file/d/1XMrqQGYKTSRXhxdouloYSVUGwDkitjWX/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2568
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Code-barres Cote Support Localisation Section Disponibilité 010013 - Périodique Bibliothèque principale Documentaires Disponible Removal of chromium from tanning wastewater by chemical precipitation and electrocoagulation / Bianca Mella in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 2 (03-04/2016)
[article]
Titre : Removal of chromium from tanning wastewater by chemical precipitation and electrocoagulation Type de document : texte imprimé Auteurs : Bianca Mella, Auteur ; Ana Cláudia Cristófoli Glanert, Auteur ; Mariliz Gutterres, Auteur Année de publication : 2016 Article en page(s) : p. 55-61 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Eaux usées -- Epuration
Electrocoagulation
Précipitation (chimie)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Although chromium is used in the form of basic chromium sulfate for processing hides, it has well-known adverse effects when improperly disposed of in the environment under certain circumstances when Cr(III) can be oxidized to Cr(VI). Tanneries use large amounts of water for processing hides ; hence, chromium recovery from tanning wastewater is an environmentally friendly and economically viable alternative, as it can prevent a greater amount of chromium-containing sludge from being disposed of in industrial hazardous waste landfills. Compliance with environmental legislation also poses a challenge to the leather industry, as the parameters for discharging treated wastewater into receiving water bodies are increasingly stringent, which encourages the practice of techniques for recovery and reuse of chemical inputs in the tanning of hides. This study focuses on the removal of the chromium present in tanning wastewater through chemical precipitation and electrocoagulation. In both methods, chromium is separated in the form of an insoluble precipitate either by the addition of alkali or by the oxidation and réduction of metal anodes. Chemical precipitation resulted in 99.74% of removal efficiency, while in electrocoagulation with aluminum, copper and iron efectrodes, removal efficiency was 97.76%, 69.91% and 90.27%, respectively. Note de contenu : - Wastewater sample
- Chemical precipitation
- Electrocoagulation reactor
- Analytical methodsEn ligne : https://drive.google.com/file/d/1oC6s2fUs82p2BGfS36WAMqlASuQ1TrD2/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26087
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 100, N° 2 (03-04/2016) . - p. 55-61[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17955 - Périodique Bibliothèque principale Documentaires Disponible Screening of natural dyes from filamentous fungi and leather dyeing with Monascul purpureus extract / Wagner Fernando Fuck in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 2 (03-04/2018)
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Titre : Screening of natural dyes from filamentous fungi and leather dyeing with Monascul purpureus extract Type de document : texte imprimé Auteurs : Wagner Fernando Fuck, Auteur ; Fernanda C. Lopes, Auteur ; Adriano Brandelli, Auteur ; Mariliz Gutterres, Auteur Année de publication : 2018 Article en page(s) : p. 69-74 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Champignons et constituants
Colorants végétaux
Colorimétrie
Cuirs et peaux -- Teinture
Photostabilité
Résistance thermiqueIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Certain species of filamentous fungi produce coloured substances as secondary metabolites, which can be used as dyes for industrial applications. These natural dyes can be environmentally friendly alternatives to synthetic dyes, since they are extracted from sustainable sources with high yields, can be produced independently of seasonal effects, and no hazardous chemicals are used while they are produced. In this study, a screening of natural colourants from filamentous fungi was carried out by cultivation in liquid medium and further the Monascus purpureus extract was applied to leather dyeing. The efficiency of the dyeing was quantified through the remaining dye concentration in the wastewater by UV-vis spectroscopy, and the quality parameters of the leather samples were evaluated by the change of colour when they were exposed to light and heat. The absorption of Monascus dye into the leather was 70.6 ± 2.7% when deacidification at pH5.0 was used. The dyed leather showed good penetration, colour homogeneity and heat fastness. Note de contenu : - MATERIALS AND METHODS : Filamentous fungi strains - Production of dyes - Colourmetric analysis - Leather dyeing
- RESULTS AND DISCUSSION : Selection of natural dyes extracted from filamentous fungi - Evaluation of leather with Monascus purpureus dye - Analysis of heat and UV light fastness of leather dyed with M. purpureus dyeEn ligne : https://drive.google.com/file/d/1l_x3o8Zcme9CoYVqZN5bssYTJ-bufwri/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30559
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 102, N° 2 (03-04/2018) . - p. 69-74[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19867 - Périodique Bibliothèque principale Documentaires Disponible Special review : anaerobic digestion of leather industry wastes - An alternate source of energy / Guilherme P. S. Priebe in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 2 (02/2017)
PermalinkSpecial review paper : leather dyeing with biodyes from filamentous fungi / Wagner Fernando Fuck in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 9 (09/2018)
PermalinkStudy of fatliquoring parameters using experimental design / Mariliz Gutterres in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 93, N° 5 (09-10/2009)
PermalinkTetraselmis sp. isolated from a microalgae consortium for tannery wastewater treatment / Aline de Cassia Campos Pena in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 5 (09-10/2018)
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