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An effective way to prepare high performance biomass-based fatliquoring agent - Bromination modification of rapeseed oil and its fatliquoring and flame-retardant properties / Tao Luo in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 8 (08/2023)
[article]
Titre : An effective way to prepare high performance biomass-based fatliquoring agent - Bromination modification of rapeseed oil and its fatliquoring and flame-retardant properties Type de document : texte imprimé Auteurs : Tao Luo, Auteur ; Xu Zhang, Auteur ; Biyu Peng, Auteur ; Chunxiao Zhang, Auteur ; Sadaqat Ali Chattha, Auteur Année de publication : 2023 Article en page(s) : p. 346-353 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Absorption
Analyse sensorielle
Biomasse
BromationSubstitution dans une molécule d'un atome d'hydrogène par un atome de brome.
Combustion
Croûte (cuir)On entend par "cuir en croûte" des cuirs ayant subi les opérations jusqu'au tannage, à l'exclusion de toute opération de corroyage ou de finissage, mais qui, par opposition aux wet-blue ont été séchés.
Cuirs et peaux -- Analyse
Douceur (toucher)
Essais accélérés (technologie)
Essais de résilience
Fourier, Spectroscopie infrarouge à transformée de
Huile de colza
IgnifugeantsComposé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface.
Produits de nourriture du cuirIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : With the implementation of Carbon Neutralization strategy, it is urgently needed to develop low-carbon leather chemicals through replacing petrochemicals with biomass-based raw materials in leather industry. To solve the problems existing in the leather fatliquored by the biomass-based fatliquoring agents made from vegetable oils with high unsaturation, such as poor storability, unpleasant odor, yellowing and possible formation of hexavalent chromium, the strategy was put forward, improving the oil saturation through the double bonds addition reaction with halogen to solve the abovementioned problems resulting from the poor oxidation resistance of oil, and increase the binding ability of the oil with leather fibers and endow the leather with flame-retardant simultaneously. In this paper, the methods of modified rapeseed oil by bromine addition and its fatliquoring and flame-retardant properties were studied. The results showed that the bromine addition reaction of rapeseed oil was easy to proceed and the iodine value of the modified oil decreased almost linearly with the added amount of bromine. The binding and antioxidant properties of the oil and the physical properties of the fatliquored leather were significantly improved with the increase degree of bromination modification. Furthermore, above mentioned unpleasant odor, yellowing and hexavalent chromium formation problems were effectively solved when the iodine value of modified fatliquors was reduced to 31 g I2/100 g. Additionally, brominemodified rapeseed oil could endow leather with good flame-retardant properties and the fatliquored leather was changed from combustible to flame-retardant material with the increasing amount of bromine in the oil. The limit oxygen index (LOI) increased from 24% to 31%, the flame combustion time decreased from 127.0 s to 4.3 s, and the flameless combustion time decreased from 28.5 s to 0.0 s. This study provided an effective way to develop biomass-based and low-carbon fatliquors based on natural unsaturated oils. Note de contenu : - MATERIALS AND METHODS : Materials - Bromination modification of rapessed oil - Preparation of leather fatliquoring agent - Application of fatliquors in the fatliquoring process - Determination of the iodine value of oils - Fourier Transform Infrared Spectroscopy (FT-IR) of oils - Absorption rate of fatliquors - Distribution of Br element and collagen fibers - Binding ability of modified oils with leather fibers - Limiting oxygen index (LOI) test of crust leather - Vertical combustion test of crust leather - Ageing test of crust leather - Odor level evaluation of crust leather - Yellowing resistance property of crust leather - Softness and physical properties of crust leather
- RESULTS AND DISCUSSION : Preparation and characterization of bromine-modified rapessed oil - Absorption rate of oil and its distribution in leather - Effect of rapessed oil modification degree on the properties of fatliquored leather
- Table 1 : Absorption rate of fatliquors
- Table 2 : Oil extraction test results
- Table 3 : Leather vertical combustion test results
- Table 4 : Leather softness test resultsDOI : https://doi.org/10.34314/jalca.v118i8.8092 En ligne : https://drive.google.com/file/d/12reqFQXSFwDRWiNVXr_pFHQVWb2biTpR/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39674
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVIII, N° 8 (08/2023) . - p. 346-353[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24134 - Périodique Bibliothèque principale Documentaires Disponible Effect of electrostatic interaction between collagen and enzymes on permeation of protease into the pelt during leather bating process / Yiwen Zhu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 10 (10/2023)
[article]
Titre : Effect of electrostatic interaction between collagen and enzymes on permeation of protease into the pelt during leather bating process Type de document : texte imprimé Auteurs : Yiwen Zhu, Auteur ; Jinzhi Song, Auteur ; Xu Zhang, Auteur ; Mengchu Gao, Auteur ; Biyu Peng, Auteur ; Chunxiao Zhang, Auteur Année de publication : 2023 Article en page(s) : p. 428-438 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Confitage enzymatique
Cuirs et peaux
Electrostatique
Peptidases
Perméation
PoidsIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The enzymatic delimed pelts bating process using proteases is critical to improving the overall performance of the leather. Bating effectiveness is determined not only by the properties but also by the permeation behavior of the proteases. Imperfect methods to control protease permeation often results in uneven distribution of enzyme proteins in the pelts, leading to excessive enzymolysis of the surface layer and inadequate opening-up of the inner layer. In this study, the relative size of proteases and delimed pelts were analyzed, the permeation behavior of fluorescein-labeled proteases in the pelt was observed using a confocal laser scanning microscope (CLSM), and the effect of electrostatic interaction between protease and collagen proteins on the permeation of protease into the pelt was investigated. The results showed that, after dehairing, liming and deliming operations, the enzyme can easily permeate into the pelts due to the formation of large cavities and interfibrillar gaps. The permeation of protease within the delimed pelt is significantly influenced by the affinity (electrostatic interactions) between the collagen and protease proteins. The isoelectric point (pI) of the protease protein, the collagen and the pH of the solution directly influence the electrostatic properties and interactions. When the enzyme and collagen are similarly charged (electrostatic repulsion), the enzyme can easily permeate into the pelts; when the enzyme and collagen are oppositely charged (electrostatic attraction), the permeation of the enzyme into the inner layer is difficult, resulting in the accumulation of protease on the grain and excessive hydrolysis of the grain layer. Therefore, the established permeation regulation mechanism of protease based on electrostatic interactions between enzyme and collagen could serve as an important basis for the selection of protease and the regulation of the enzymatic bating process. Note de contenu : - MATERIALS AND METHODS : Materials - Determination of protease particle size and delimed pelts pore diameter - Preparation and characteriztion of fluorescein-labeled proteases
- RESULTS AND DISCUSSION : The particle size of protease in solution and pore diameter of delimed pelts - Determination of the pI of the delimed pelt - Characterization of the FITC-labeled proteases - UV-Vis spectroscopy characterization of FITC-labeled proteases - FLuorescence spectroscopy characterizations of FITR labeled proteases - pI and relative molecular weight of labeled proteases - Effect of proteins affinity on proteases permeation behavior in delimed pelts - Effect of pH on the surface of the pelts during enzymatic bating - Charge regulation mechanism of protease permeation in delimed pelts
DOI : https://doi.org/10.34314/jalca.v118i10.8231 En ligne : https://drive.google.com/file/d/1xABUCLjci5t-d9y12Zp6saB4Vg83zurc/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39941
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVIII, N° 10 (10/2023) . - p. 428-438[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24241 - Périodique Bibliothèque principale Documentaires Disponible Effects of calcium content on the enzymatic bating of delimed hides / Chunxiao Zhang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 12 (12/2022)
[article]
Titre : Effects of calcium content on the enzymatic bating of delimed hides Type de document : texte imprimé Auteurs : Chunxiao Zhang, Auteur ; Buqing Ye, Auteur ; Jinzhi Song, Auteur ; Biyu Peng, Auteur Année de publication : 2022 Article en page(s) : p. 507-514 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Confitage Le confitage est une action biochimique effectuée au moyen de produits enzymatiques, qui a pour but de dégrader les fibres élastiques, contribuant ainsi à augmenter la souplesse du cuir. En outre, les enzymes complètent la dégradation des résidus épidermiques, donnant ainsi une fleur plus propre et plus lisse.
Cuirs et peaux -- Teneur en calcium
EnzymesUne enzyme est une protéine dotée de propriétés catalytiques. Pratiquement toutes les biomolécules capables de catalyser des réactions chimiques dans les cellules sont des enzymes ; certaines biomolécules catalytiques sont cependant constituées d'ARN et sont donc distinctes des enzymes : ce sont les ribozymes.
Une enzyme agit en abaissant l'énergie d'activation d'une réaction chimique, ce qui accroît la vitesse de réaction. L'enzyme n'est pas modifiée au cours de la réaction. Les molécules initiales sont les substrats de l'enzyme, et les molécules formées à partir de ces substrats sont les produits de la réaction. Presque tous les processus métaboliques de la cellule ont besoin d'enzymes pour se dérouler à une vitesse suffisante pour maintenir la vie. Les enzymes catalysent plus de 5 000 réactions chimiques différentes2. L'ensemble des enzymes d'une cellule détermine les voies métaboliques qui peuvent avoir lieu dans cette cellule. L'étude des enzymes est appelée enzymologie.
Les enzymes permettent à des réactions de se produire des millions de fois plus vite qu'en leur absence. Un exemple extrême est l'orotidine-5'-phosphate décarboxylase, qui catalyse en quelques millisecondes une réaction qui prendrait, en son absence, plusieurs millions d'années3,4. Comme tous les catalyseurs, les enzymes ne sont pas modifiées au cours des réactions qu'elles catalysent, et ne modifient pas l'équilibre chimique entre substrats et produits. Les enzymes diffèrent en revanche de la plupart des autres types de catalyseurs par leur très grande spécificité. Cette spécificité découle de leur structure tridimensionnelle. De plus, l'activité d'une enzyme est modulée par diverses autres molécules : un inhibiteur enzymatique est une molécule qui ralentit l'activité d'une enzyme, tandis qu'un activateur de cette enzyme l'accélère ; de nombreux médicaments et poisons sont des inhibiteurs enzymatiques. Par ailleurs, l'activité d'une enzyme décroît rapidement en dehors de sa température et de son pH optimums.Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The effects of calcium content on the enzymatic bating of delimed hide were analyzed by amino acid analysis, tissue staining, and scanning electron microscopy–elemental energy spectrometry. Results show that the content and form of calcium in pelt can affect enzyme activity. The content of calcium in pelt can be adjusted by phosphoric-phosphate deliming to reduce the degree of damage caused by enzymes to elastin and collagen. The calcium bound in pelt can be further removed by deliming using a calcium chelator, thus effectively improving the efficiency of enzyme action. When the calcium content is lower than 0.6%, the removal degree of elastin by enzymes and the loosening effect to collagen fiber can be significantly improved. This research offers important guidance to improve the leather bating process. Note de contenu : - MATERIALS AND METHODS : Materials - Methods
- RESULTS : Property analysis of the delimed pelt - Effect of calcium content of pelt on enzymatic bating - Influence of calcium content of pelt on enzymatic bating with elastase - Effect of calcium content of pelt on the collagenase effect - Analysis of enzymatic mechanism of delimed pelt by calcium content and its practical application
- Table 1 : Deliming effectiveness of the series of methodsDOI : https://doi.org/10.34314/jalca.v117i12.6386 En ligne : https://drive.google.com/file/d/1nyWT3eZlVICHo-sqWkl-VRKEgjY8_lzM/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38522
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Code-barres Cote Support Localisation Section Disponibilité 23774 - Périodique Bibliothèque principale Documentaires Disponible Enzymatic bating technology for wet blue : II. The basic properties and application effectiveness of typical acidic proteases / Xu Zhang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 12 (12/2020)
[article]
Titre : Enzymatic bating technology for wet blue : II. The basic properties and application effectiveness of typical acidic proteases Type de document : texte imprimé Auteurs : Xu Zhang, Auteur ; Zhong Xiang, Auteur ; Mengchu Gao, Auteur ; Biyu Peng, Auteur ; Chunxiao Zhang, Auteur Année de publication : 2020 Article en page(s) : p. 444-453 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Confitage Le confitage est une action biochimique effectuée au moyen de produits enzymatiques, qui a pour but de dégrader les fibres élastiques, contribuant ainsi à augmenter la souplesse du cuir. En outre, les enzymes complètent la dégradation des résidus épidermiques, donnant ainsi une fleur plus propre et plus lisse.
Peptidases
Poids moléculaires
Point isoélectriqueEn biochimie, le point isoélectrique (pI) ou potentiel hydrogène isoélectrique (pHI) est le pH auquel une molécule est sous forme d'ion mixte ou, en physico-chimie, le pH d'une solution aqueuse dans laquelle un solide existe sous un potentiel électrique neutre.
En physico-chimie : Selon Bolger, le caractère acide ou basique d'une surface s'exprime par son point isoélectrique " Is ou IEPS (Iso Electric point for the surface) " ou point de charge nulle " PCN ou PZC (Point of Zero Charge) ", défini comme étant le pH de la solution aqueuse dans laquelle le solide existe sous un potentiel électrique neutre. Si le pH de la solution est basique, la surface est acide, et inversement. La différence entre le PZC et l'IEPS est basée sur le phénomène d'adsorption spécifique. On peut considérer que si la grandeur mesurée ne dépend pas de la solution utilisée pour la mesurer (pH, concentration, nature des ions), alors on a affaire à un PZC. Dans le cas contraire, c'est un IEPS que l'on mesure. Par exemple, quand la mesure de goutte sessile à deux liquides est utilisée, on considère en général qu'il n'y a pas adsorption des ions de cette goutte et que la goutte déplace complètement l'alcane qui sert de deuxième liquide: on est alors en présence d’un PZC. Au contraire, dans les mesures de potentiel d'écoulement (streaming potential), la solution joue un rôle important et c'est un IEPS que l'on mesure. Enfin, la charge nette se définit grâce au pH de la solution aqueuse dans laquelle la surface métallique existe, dans un état électriquement neutre (c’est-à -dire [M-OH2+ surf]=[M-O- surf]) et au PZC.
- Si pH < PZC alors la charge nette est positive
- Si pH > PZC alors la charge nette est négative.
Il existe plusieurs méthodes expérimentales permettant de décrire l’état acido-basique de la surface : la mesure du potentiel d’écoulement, la photoélectrochimie, la mesure de l’angle de contact, et la spectroscopie XPS.
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Most of the reported bating technologies for wet blue are based on the usage of acidic protease, which takes a long time and needs large enzyme dosage. A thorough understanding of the basic characteristics of typical acidic proteases and the interaction between enzyme proteins and wet blue fibers will help to improve bating technology for wet blue by selecting the suitable proteases. In this paper, the enzymatic characteristics, molecular weight (Mr) and isoelectric point (pI) of several proteases and their bating effectiveness were investigated. The results indicated that there are two main factors which may affect the wet blue bating effectiveness of acidic proteases. First, the common acidic proteases exhibited low activity towards chrome-tanned collagen fiber which lead to inefficient bating effect through normal dosage. Nonetheless, when the dosages of chrome-tanned collagen fiber activity reached up to 50 U/mL, these acidic proteases also can achieve a good bating effect, the caseinolytic activity has been reached up to 1000 U/mL-4000 U/mL. Second, because of the large molecular weight and the charge repulsion between enzyme proteins and wet blue fibers, the enzymatic hydrolysis process, the penetration and distribution of acidic protease proteins, into wet blue is very difficult. Additionally, neutral proteases have more prospects in wet blue bating process due to the higher chrome-tanned collagen fiber activity and less charge repulsion than acidic proteases. Note de contenu : - MATERIALS AND METHODS : Materials - Thermal stability of proteases - Assay of proteolytic activity on casein substrate - Assay of proteolytic activity on chrome tanned collagen fiber substrate - Determination the molecular weight and isoelectric point of acidic proteases - Bating wet blue with typical protease preparations - Determination of the concentration of soluble protein in the reaction liquor - Determination of the concentration of hypro in the reaction liquor - Histological analysis of collagen fiber - Test of softness and physical properties of crust leather - Characteristics of typical proteases - Effects of activities of acidic proteases on wet blue bating - Comparison of the bating effectiveness of acidic and neutral proteases
- Table 1 : Selected wet blue bating protease preparations
- Table 2 : Enzymatic characteristics of proteases
- Table 3 : Amounts of proteases, soluble protein and hydroxyproline in wet blue bating liquor treated by same dosage of caseinolytic activity
- Table 4 : Softness and physical properties of crust leather treated by same dosage of caseinolytic activity
- Table 5 : Amounts of proteases, soluble protein and hydroxyproline in wet blue bating liquor treated by same dosage of chrome-tanned collagen fiber activity
- Table 6 : Softness and physical properties of crust leather treated by same dosages of chrome-tanned collagen fiber activity
- Table 7 : Amounts of proteases, soluble protein and hydroxyproline in wet blue bating liquor
- Table 8 : Softness and physical properties of crust leather
- Fig. 1 : Thermal stability of proteases
- Fig. 2 : SDS-PAGE and IEF-PAGE electrophoresis diagrams of acidic proteases
- Fig. 3 : Staining results of collagen fiber in wet blue treated by same dosage of caseinolytic activity
- Fig. 4 : Staining results of collagen fiber in wet blue treated by same dosage of chrome-tanned collagen fiber activity
- Fig. 5 : Staining results of collagen fiber in wet blue treated by acidic (YNU-A) or neutral (EW01) proteaseDOI : https://doi.org/10.34314/jalca.v115i12.4202 En ligne : https://drive.google.com/file/d/1a1xhfXBA5gEOf7Ziz0T3ZgVFUWgOzY2u/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34997
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Code-barres Cote Support Localisation Section Disponibilité 22510 - Périodique Bibliothèque principale Documentaires Disponible Exploration of the diffusion, binding and crosslinking of chromium complex within hides during chrome tanning / Chunxiao Zhang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIV, N° 5 (05/2019)
[article]
Titre : Exploration of the diffusion, binding and crosslinking of chromium complex within hides during chrome tanning Type de document : texte imprimé Auteurs : Chunxiao Zhang, Auteur ; Jieming Hu, Auteur ; Desheng Yu, Auteur ; Cong Xia, Auteur ; Sadaqat Ali Chattha, Auteur ; Biyu Peng, Auteur Année de publication : 2019 Article en page(s) : p. 180-188 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acides carboxyliques
Cuirs et peaux -- Analyse
Diffusion (physique)
Eaux usées -- Analyse
Formiate de sodium
Formique, Acide
Liaisons chimiques
pH
PicklageLe picklage consiste à faire absorber à la peau en tripe une quantité importante d'acide, en présence de sel neutre (NaCl) pour réprimer le gonflement que provoquerait l'acidité du milieu.
Sulfurique, Acide
Tannage au chromeIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Understanding the persuasive mechanisms of the accessibility and interactions of chromium complex with collagen is an important fundamental issue for maximizing the utilization of chromium during the transformation of collagen to leather by chrome tanning technology. This study details these mechanisms through process monitoring of the effects of technical conditions of chromium diffusion and its binding with the collagen matrix. The results indicated that there was no discernible impact of carboxylic masking agents on both diffusion and binding behavior of chromium complexes at low pH before basification, but it portentously declined the total chromium absorption at the end of chrome tanning. The results made known that in the course of chrome tanning, the higher pH conditions encouraged the diffusion and binding behavior of chromium complexes with collagen matrix not only before but after the basification as well. Chrome tanning at high pH did not cause excessive surface tanning effects of the leather, but the WAXD study indicated that there was much more crosslinking (both intra and inter triple helix) of collagen fibers in the inner layers of leather matrix, which had a robust impact on the fullness, tightness and stiffness of the finished leather. These findings could provide more theoretical foundations for the development of high exhaustion chrome tanning technology as a method for reduced chromium emission and improved the quality of leather during leather manufacture. Note de contenu : - EXPERIMENTAL : Materials and instruments - Pickling and chrome tanning with carboxylic acid and sulfuric acid - Pickling and chrome tanning with different formic acid dosages - Chrome tanning with different sodium formate dosages - Chrome tanning at varying initial pH with sulfuric acid pickling - Determination of chromium concentration in spent tanning liquors - Determination of chromium content in leather - Scanning Electron Microscopy (SEM) analysis - Scanning Electron Microscope-X-ray energy dispersive spectroscopy (SEM-EDS) analysis - Wide-angle X-ray diffraction (WAXD) studies
- RESULTS AND DISCUSSIONS : Influence of the molecular structure of carboxyl acid on chrome tanning - Effects of the dosages of carboxyl groupe on chrome tanning - Influence of pickling pH on chrome tanningEn ligne : https://drive.google.com/file/d/1ZX8MWYG68fy_UO8IzDkwdpnHPv1SQBjW/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32478
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Code-barres Cote Support Localisation Section Disponibilité 20910 - Périodique Bibliothèque principale Documentaires Disponible Key mechanism of enzymatic dehairing technology for leather-making : permeation behaviors of protease into animal hide and the mechanism of charge regulation / Mengchu Gao in COLLAGEN AND LEATHER, Vol. 5 (2023)
PermalinkMinimization of chromium discharge in leather processing by using methanesulfonic acid : A cleaner pickling-masking-chrome tanning system / Chunxiao Zhang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 12 (12/2016)
PermalinkA novel approach for quantitative characterization of hydrolytic action of glycosidases to glycoconjugates in leather manufacturing / Fengxiang Luo in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 7 (07/2020)
PermalinkA novel recycling technology for chrome shavings : Application of non-swelling acids during dechroming process / Sadaqat Ali Chattha in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIX, N° 8 (08/2024)
PermalinkPolymethylsilsesquioxane powder prepared by morphology-controlled growth and its composite with waterborne latex for superhydrophobic coating fabrication / Baiyu Li in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 5 (09/2019)
PermalinkPreparation of amphiphilic acrylate copolymer containing active epoxy group and its fatliquoring : Effect on aldehyde-tanned leather / Huang Yingying in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 3 (05-06/2023)
PermalinkA rapid method for measuring elastin degradation and its application in leather manufacturing / Xu Zhang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 8 (08/2020)
PermalinkResource utilization of bovine hair recycling from enzymatic unhairing during leather manufacturing : Alkali-protease synergistic preparation of keratin and its in vitro antioxidant activity / Ting Liu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 9 (09/2023)
PermalinkThe impact of proteases on elastin in leather manufacture / Xu Bingbin in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 96, N° 3 (05-06/2012)
PermalinkTypical defects of natural phospholipid fatliquors in leather industry and their solutions / Zhikun Chen in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVI, N° 11 (11/2021)
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