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Collagen hydrolysate extraction from chromed leather waste for polymeric film production / Bianca S. Scopel in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 1 (01/2016)
[article]
Titre : Collagen hydrolysate extraction from chromed leather waste for polymeric film production Type de document : texte imprimé Auteurs : Bianca S. Scopel, Auteur ; D. L. Lamers, Auteur ; Eric Matos, Auteur ; Camila Baldasso, Auteur ; Aline Dettmer, Auteur Année de publication : 2016 Article en page(s) : p. 30-40 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Amidons
Couches minces
Couches minces -- Propriétés mécaniques
Cuirs et peaux -- Déchets -- Recyclage
Extraction (chimie)
GlycérineLe glycérol, ou glycérine, est un composé chimique de formule HOH2C–CHOH–CH2OH. C'est un liquide incolore, visqueux et inodore au goût sucré, utilisé dans de nombreuses compositions pharmaceutiques. Sa molécule possède trois hydroxyles correspondant à trois fonctions alcool responsables de sa solubilité dans l'eau et de sa nature hygroscopique. Un résidu glycérol constitue l'articulation centrale de tous les lipides de la classe des triglycérides et des phosphoglycérides.
PROPRIETES PHYSIQUES : Le glycérol se présente sous la forme d'un liquide transparent, visqueux, incolore, inodore, faiblement toxique si ingéré (mais laxatif à haute dose), au goût sucré.
Le glycérol peut se dissoudre dans les solvants polaires grâce à ses trois groupes hydroxyles. Il est miscible dans l'eau et l'éthanol ; et insoluble dans le benzène, le chloroforme et le tétrachlorométhane.
Son affinité avec l'eau le rend également hygroscopique, et du glycérol mal conservé (hors dessicateur ou mal fermé) se dilue en absorbant l'humidité de l'air.
- PROPRIETES CHIMIQUES : Dans les organismes vivants, le glycérol est un composant important des glycérides (graisses et huiles) et des phospholipides. Quand le corps utilise les graisses stockées comme source d'énergie, du glycérol et des acides gras sont libérés dans le sang.
- DESHYDRATATION : La déshydratation du glycérol est faite à chaud, en présence d'hydrogénosulfite de potassium (KHSO3) et produit de l'acroléine
- ESTERIFICATION : L'estérification du glycérol conduit à des (mono, di ou tri) glycérides.
- AUTRES PROPRIETES : Le glycérol a un goût sucré de puissance moitié moindre que le saccharose, son pouvoir sucrant est de 0,56-0,64 à poids égal13.
Le glycérol a des propriétés laxatives et diurétiques faibles.
Comme d'autres composés chimiques, tels que le benzène, son indice de réfraction (1,47) est proche de celui du verre commun (~1,50), permettant de rendre "invisibles" des objets en verre qui y seraient plongés.
Hydrolysats de protéines
PolymèresIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The generation of hazardous wastes and the overuse of nonrenewable sources in polymeric materials production are two major concerns for researchers worldwide. In this paper, an innovative approach to changing chromed leather waste (CLW) into a raw material for polymeric film production was studied. Collagen hydrolysate was extracted from CLW through alkaline hydrolysis. Time, temperature, agitation speed, type and mass of alkalinizing agent were tested. The optimum condition for collagen hydrolysate production (the one that results in a high protein and low chromium content) was determined. According to statistical analysis, hydrolysis performed for 6 h using a proportion of 4 g of MgO for each 50 g of CLW and 250 ml of water at 70°C and 180 rpm of agitation speed led to the best protein/chromium ratio in the collagen hydrolysate (TKN: 2,185.7 mg/L, Cr: <0.04 mg/L). The collagen hydrolysate obtained with optimum condition of production was then mixed with starch - a renewable source for polymeric material production - and glycerol - a byproduct of biodiesel production - to produce polymeric films by casting technique. Mechanical properties of four different compositions (with and without the presence of collagen hydrolysate and glycerol) of films were compared. The films produced with the addition of glycerol and collagen hydrolysate presented mechanical properties similar to the ones of commercial biodegradable films applied as mulches in agriculture. They also have in their composition a compound present in fertilizers - nitrogen - and possible traces of chromium, which is a micronutrient. Therefore, they can be an alternative to synthetic polymers. Note de contenu : - MATERIALS AND METHODS : Materials - Collagen hydrolysate extraction - Film production - Characterization methods
RESULTS AND DISCUSSION : CLW characterization - Collagen hydrolysate extraction - Film productionEn ligne : https://drive.google.com/file/d/1rOz_3-AWwBFBpO5i3u3YYFWRYlTxgpTG/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25276
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Code-barres Cote Support Localisation Section Disponibilité 17767 - Périodique Bibliothèque principale Documentaires Disponible Collagen recovered, purified and enzymatically hydrolysed from tannery waste / M. E. Errasti in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 108, N° 1 (01-02/2024)
[article]
Titre : Collagen recovered, purified and enzymatically hydrolysed from tannery waste Type de document : texte imprimé Auteurs : M. E. Errasti, Auteur ; Laura M. I. Lopez, Auteur Année de publication : 2024 Article en page(s) : p. 1-8 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Collagène
Cuirs et peaux -- Déchets -- Recyclage
Déchets industriels -- Recyclage
Enzymes végétales
Hydrolysat de collagène
Hydrolyse
Peptidases
Produits chimiques -- Purification
Récupération (Déchets, etc.)
Tannage -- DéchetsIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : One of the main challenges of the tannery industry is the management of the waste generated during the leather manufacturing process. This study aimed to recover the collagen from tanning industry waste to acquire knowledge about its conversion into high value-added ingredients with bio-functional properties. To this end, collagen was purified from rawhide waste from the leather industry, characterised by electrophoresis and compared with commercial collagen. Subsequently, it was subjected to an enzymatic treatment using plant proteases from Bromelia hieronymi under mild reaction conditions to produce hydrolysates, since the production of bioactive peptides by enzymatic hydrolysis is a sustainable way of taking advantage of protein by-products. The hydrolysates were characterised by matrix-assisted laser desorption/ionisation time-of-flight (MALDI TOF) mass spectrometry, showing peptides with molecular weights ranging from 1,000 to 6,000 Da. Liquid chromatography-mass spectrometry (LC-MS/MS) analysis allowed identifying 31 peptides from the a, chain of type I collagen and another 13 from the a2 chain of type I collagen. The probability that the peptides identified were bioactive was predicted with the Peptide Ranker software ('in silico analysis'). This demonstrated that 70% of them had high bioactive potential. These results showed that the collagen recovered from the waste of the tannery industry and hydrolysed by proteases from Bromelia hieronymi becomes a suitable source to obtain a product with greater added value than the original material and with multiple potential industrial applications. Note de contenu : - Chemicals
- Collagen recovery
- Plant enzymatic preparation
- Preparation of collagen hydrolysate
- Collagen hydrolysate characterisation
- Table 1 : Chemical characterisation of the spiits before and alter the preliminary processing. Values are expressed as meant SD
- Table 2 : HC peptides identified by LC-MS/MS and the potential to be bioactive (a Score obtained with PeptideRanker)En ligne : https://drive.google.com/file/d/1Y7TX9F5xRUSAxM8b0VRzEpEI3v406L0t/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40927
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 108, N° 1 (01-02/2024) . - p. 1-8[article]A comparative study of various collagen fibre waste as oil sorbent materials / Weining Du in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 99, N° 6 (11-12/2015)
[article]
Titre : A comparative study of various collagen fibre waste as oil sorbent materials Type de document : texte imprimé Auteurs : Weining Du, Auteur ; Han Xiaona, Auteur ; Li Zhengjun, Auteur ; Sun Guolong, Auteur ; Li Lixin, Auteur Année de publication : 2015 Article en page(s) : p. 267-272 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorbants et adsorbants
Collagène
Cuirs et peaux -- Déchets -- Recyclage
Epoxydes
Huile de colza
Huiles et graisses
Hydrophobie
Nettoyage
Oligomères
PolydiméthylsiloxaneLe polydiméthylsiloxane —[O-Si(CH3)2]n—, ou poly(diméthylsiloxane) selon la nomenclature systématique, communément appelé PDMS ou diméthicone, est un polymère organominéral de la famille des siloxanes souvent présent dans les shampoings. On l'y ajoute pour augmenter le volume des cheveux mais il peut également aller boucher les pores du cuir chevelu et rendre les cheveux gras. C'est une des raisons pour lesquelles se laver les cheveux tous les jours est très déconseillé avec un shampooing contenant des silicones.
Il existe également de l'amodiméthicone, qui est un dérivé du diméthicone.
Le polydiméthylsiloxane est un additif alimentaire (E900), utilisé comme antimoussant dans les boissons (Coca-Cola BlāK).
La chaîne de poly(diméthylsiloxane) forme également la structure de base des huiles et des caoutchoucs silicones.
Poudre de peaux
SiliconesLes silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki).Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : To compare the potentiel utilization of various collagen fibre wastes from the leather industry, such as raw hide waste, oil-tanned and chrome-tanned wastes, as oil sorbents, a hydrophobic polydimethylsiloxane (PDMS) modified collagen fibre was prepared using raw hide waste and an epoxy-terminated silicone oligomer. We fabricated samples 13y a lyophilization technique utilizing the corresponding hide powder fibre (HPF). The oil sorption capacity, sorption saturation time, and retention capacity of prepared sorbents were studied. The results showed that oil sorption capacity of PDMS-modified HPF for silicone oil and vegetable (rape) oil were 6.98 and 5.58g/g, respectively. This sample exhibited the highest oil sorption capacity. The resuits suggest that with appropriate pore size, high porosity and low apparent surface energy, collagen fibre based sorbent would demonstrate favourable oil sorption characteristics and is very promising for ail cleanup application. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Preparation of hide powder fibres (HPFs) and PDMS-modified HPF - Preparation of pie-shaped HPF sorbents - Oil sorption capacity - Oil sorption saturation time - Oil retention capacity - Characterizations
- RESULTS AND DISCUSSION : Oil sorption capacity in pure oil medium - Oil sorption saturation time - Oil retention capacityEn ligne : https://drive.google.com/file/d/1gdQCSjGxM_TPnqo-uzetB6n3UyHHkflr/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25097
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Code-barres Cote Support Localisation Section Disponibilité 17683 - Périodique Bibliothèque principale Documentaires Disponible Correlation analysis concerning the physical and mechanical properties of composites made of chromium leather scraps-chloroprene rubber adhesive RL-CR / Dongsheng Xin in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 3 (05-06/2023)
[article]
Titre : Correlation analysis concerning the physical and mechanical properties of composites made of chromium leather scraps-chloroprene rubber adhesive RL-CR Type de document : texte imprimé Auteurs : Dongsheng Xin, Auteur ; Yurui Xin, Auteur ; Yinghua Ma, Auteur Année de publication : 2023 Article en page(s) : p. 83-87 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Allongement à la rupture
Assemblages collés
Caoutchouc
Composites -- Propriétés mécaniques
Composites -- Propriétés physiques
Cuirs et peaux -- Déchets -- Recyclage
Eclatement (matériaux)
Humidité -- Absorption:Eau -- Absorption
Mouillabilité
Perméabilité
Polychloroprène
Traction (mécanique)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this paper, the pearson product moment correlation coefficient analysis method is used to show that the tensile strength of RL/CR is highly positively correlated with the elongation at break, the bursting height is highly positively correlated with the bursting strength, the tensile strength is highly positively correlated with the bursting strength, and the bursting height is negatively correlated with the elongation at break. The air permeability of RL/CR is not correlated with 15 minutes water absorption, but is negatively correlated with 24 hours water absorption and surface wettability ; The 15 minutes water absorption of RL/CR is negatively correlated with the 24 hours water absorption and the surface wettability ; The surface wettability is positively correlated with 24 hours water absorption.
The tensile strength of RL/CR is negatively correlated with air permeability, highly positively correlated with 15 minutes and 24 hours water absorption, and highly negatively correlated with surface wettability. The bursting strength of RL/CR is negatively correlated with air permeability and 15 min water absorption, and highly positively correlated with 24 hours water absorption and surface wettability.Note de contenu : - Introduction to correlation analysis of RL/CR
- Theoretical basis of correlation analysis method
- Experimental design of the orthogonal preparation of RL/CR and determination of its physical and mechanical properties
- Calculation of correlation coefficient of physical and mechanical properties of RL/CR
- Correlation analysis of physical and mechanical properties of RL/CR
- Table 1 : Factors and levels of orthogonal test
- Table 2 : Hot pressing process with orthogonal test
- Table 3 : Mechanical properties of orthogonal test
- Table 4 : Physical performance of orthogonal test
- Table 5 : Correlation analysis of physical and mechanical properties of L5
- Table 6 : Correlation analysis of physical and mechanical properties of L9
- Table 7 : Correlation analysis of physical and mechanical properties of L3
- Table 8 : Correlation analysis of physical and mechanical properties of L5, L9, L3
- Table 9 : Relevance of physical and mechanical properties of RL/CREn ligne : https://drive.google.com/file/d/1Vw7-aw4Zt9ocWQM7WPhmaKQWLEg0gqAG/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39577
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Code-barres Cote Support Localisation Section Disponibilité 24110 - Périodique Bibliothèque principale Documentaires Disponible Cutting by-products from car leathers / Karl Flowers in INTERNATIONAL LEATHER MAKER (ILM), N° 53 (05-06/2022)
[article]
Titre : Cutting by-products from car leathers Type de document : texte imprimé Auteurs : Karl Flowers, Auteur Année de publication : 2022 Article en page(s) : p. 60-62 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Coupe
Cuir -- Déchets
Cuir dans les automobiles
Cuirs et peaux -- Déchets -- Recyclage
Géométrisation
Recyclage organiqueIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : It is false to believe that manufacturing anything results in zero waste - unless by "zero" what you mean is when the waste can enter something called its end-of-waste cycle. These waste products can be modified by producers into valuable co-products (non-determining in the case of leather). Likewise, a company cutting car seats and trim could develop the mentality that there is the main leather cut part product and then the cutting co-products (which will also be non-determining).
This is the mentality of companies that are using the geometrisation of leather as a process design focused way of seeing the cattle hide in two parts - the leather main product and its by-products ; another name for non-determining co-product. Geometrisation, such as Kind Leather from JBS Couros for example, removes leather by-products as early in the process as possible, before they have changed into a form that determines how producers can use them.
Geometrisation is the design of a process that tries to maximise profit from all the input mass entering a cycle. Trimmings constitute a significant part of the process, with typically a tannery processing from raw to finished producing a little more than 10% - 129kg trimmings out of 1100 kgs of unsalted hide. A tannery geometrising will negate that downstream trimming by-product and those trimmings can enter the food industry as a co-product - increasing value.Note de contenu : - Collaboration
- Cutting plants
- Organic recycling
- Fig. 1 : Geometrisation of the hide - economising
- Fig. 2 : Upcycling of leather trimmings to trinkets
- Fig. 3 : Processing of end-of-life leather and leather cutting waste into composite ingredients that can be used in recycled automotive partsEn ligne : https://drive.google.com/file/d/1j34zj6EhoXxO2k4bU3ctVMNtRw7Mbh-Q/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37598
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Code-barres Cote Support Localisation Section Disponibilité 23395 - Périodique Bibliothèque principale Documentaires Disponible Les déchets en tannerie-mégisserie / Lyon : Centre Technique Cuir, chaussure, maroquinerie (CTC) (2005)
PermalinkDechroming of chromium-containing leather waste with low hydrolysis degree of collagen / Wei Ding in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 99, N° 3 (05-06/2015)
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PermalinkEnvironmental Developments and researches in brazilian leather sector / Miriam Cooper in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 95, N° 6 (11-12/2011)
PermalinkEnzymatic treatment of offal from fleshing machines / M. M. Taylor in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXIV (Année 1989)
PermalinkEstablishment of mathematical model for the influence of physical and mechanical propertis of RL-CR composites / Yinghua Ma in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 4 (07-08/2023)
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PermalinkFabrication of composite films based on chitosan and vegetable-tanned collagen fibers crosslinked with genipin / Jie Liu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVI, N° 10 (10/2021)
PermalinkFactors influencing the wet properties of leather board / Yingchua Ma in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 1 (01-02/2020)
PermalinkFibre-forming properties of collagen and gelatin derived from bovine limed-split waste / Wei Xiangyi in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 99, N° 6 (11-12/2015)
PermalinkFinding new homes for unused leather / Tom Hogarth in INTERNATIONAL LEATHER MAKER (ILM), N° 62 (11-12/2023)
PermalinkFlocculation behaviors of collagen protein-Al(III) composite flocculant / Ruiqin Li in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 2 (02/2014)
PermalinkGel-sol transitions of chrome tanned leather waste hydrolysate / F. Langmaier in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 85, N° 3 (05-06/2001)
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