An effective and harmless recycling technology for hazardous chrome-tanned leather wastes / Minghui Li in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 108, N° 2 (03-04/2024)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 108, N° 2 (03-04/2024) . - p. 67-77 Titre : An effective and harmless recycling technology for hazardous chrome-tanned leather wastes Type de document : texte imprimé Auteurs : Minghui Li, Auteur ; Xu Zhang, Auteur ; Honghong Chen, Auteur ; Sadaqat Ali Chattha, Auteur ; Xin Yan, Auteur ; Biyu Peng, Auteur Année de publication : 2024 Article en page(s) : p. 67-77 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de tannage Chimie analytique Chrome -- Recyclage 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 -- Déchets -- Recyclage Cuirs et peaux -- Propriétés mécaniques Cuirs et peaux -- Propriétés physiques Déchromage Hydrolysat de collagène Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Utilizing leather production waste to create raw materials for leather chemicals, and reintroducing it into the leather making processing, represents an ideal approach to achieving an “internal circular economy” within the leather industry. This study focuses on the reutilization of dechromed collagen fibres, obtained from chromium shavings, to generate a retanning filling. The effects of hydrolysis conditions on the viscosity, and gel strength of the dechromed collagen hydrolysates were investigated. The application effectiveness of the collagen hydrolysates with different particle sizes in the leather retanning filling process was also compared. The findings indicate that alkali hydrolysis is more conducive to producing collagen hydrolysates with a relatively higher proportion of medium and low molecular weight components, while acid hydrolysis favours the production of collagen hydrolysates rich in high molecular weight components. Additionally, collagen hydrolysates with an average particle size of 162.8 nm exhibit the best filling efficacy, imparting favorable organoleptic and physical properties to the leather. Herein, a method for preparing protein fillers, using chrome shavings as raw materials, was established, i.e., the dechromed collagen fibres (with a chromium content of approximately 33.6 mg/kg) were mixed with 2000% of water and adjusted to pH 3.0 with a small amount of sulfuric acid, and heated at 60°C with continuous stirring for 11 hours. After hydrolysis, the pH was adjusted appropriately to reuse it in the wet blue retanning filling process. The research outcomes have significant guiding implications for promoting the "internal circular economy" and sustainable development within the leather industry. Note de contenu : - EXPERIMENTS AND METHODS : Experimental materials - Dechroming of chrome shavings - Hydrolysis of dechromed collagen fibres - Performance of collagen hydrolysate as a retanning agent - Analysis and testing - RESULTS AND DISCUSSION : Preparation and performance analysis of dechromed collagen fibres materials - Influence of hydrolysis conditions on the fundamental characteristics of collagen hydrolysates - Correlation between the particle size of collagen hydrolysates and filling efficiency - Table 1 : Properties of the collagen hydrolysates - Table 2 : Physical and mechanical properties of the crust leather En ligne : https://drive.google.com/file/d/1hD0IMUh9EOcTIH7DeQDo-eDaYvoQEeci/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40933 [article]

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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]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVIII, N° 8 (08/2023) . - p. 346-353 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 Bromation Substitution 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 Ignifugeants Composé 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 cuir Index. 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 results DOI : 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 : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39674 [article]

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Application of acidic protease in the pickling to simplify the pelt bating process / Xu Zhang in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 3 (Année 2021)  

[article]  inJOURNAL OF LEATHER SCIENCE AND ENGINEERING > Vol. 3 (Année 2021) . - 14 p. Titre : Application of acidic protease in the pickling to simplify the pelt bating process Type de document : texte imprimé Auteurs : Xu Zhang, Auteur ; Mengchu Gao, Auteur ; Sadaqat Ali Chattha, Auteur ; Yiwen Zhu, Auteur ; Biyu Peng, Auteur ; Yongbin Ye, Auteur Année de publication : 2021 Article en page(s) : 14 p. Note générale : Bibliogr. Langues : Anglais (eng) 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. 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 Peptidases Picklage Le 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. Trypsine La trypsine (EC 3.4.21.4) est une enzyme digestive du suc pancréatique qui a pour rôle de digérer les protéines. Elle est synthétisée par le pancréas sous forme de trypsinogène (proenzyme inactive), puis stockée dans les vésicules enzymatiques des cellules acineuses d'où elle est excrétée au moment de la digestion. L'activation du trypsinogène en trypsine est le résultat de l'hydrolyse d'un propeptide sous l'action de l'entérokinase ou par un effet d'autoactivation de la trypsine par elle-même. La cholecystokinine-pancréozymine active la sécrétion des enzymes (donc de la trypsine) dans le suc pancréatique. La trypsine est une endoprotéase qui hydrolyse les liaisons peptidiques dans lesquelles un acide aminé basique (Lys-|-Xaa ou Arg-|-Xaa) engage sa fonction acide (sauf dans le cas où l'acide aminé suivant (schématisé ici par "Xaa") est une Proline). Elle coupe en C-terminal de ces acides aminés. En d'autres mots, elle transforme les chaînes polypeptides en chaînes protéiques plus courtes pour permettre la digestion. Efficace à pH 7,5 - 8,5, elle est inactivée et digérée en quelques heures à pH neutre (=7) dans l'intestin. La trypsine participe à l'activation d'autres enzymes comme l'alpha-chymotrypsine par coupure hydrolytique de la chaîne polypeptidique du chymotrypsinogène. Cette enzyme sert également lors de la 2e semaine du développement embryonnaire humain. Elle est sécrétée par le trophoblaste afin de digérer la zone pellucide entourant le blastocyste. Ce phénomène s'appelle l'éclosion. Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Traditionally, universally used pelt bating technologies rely on the application of trypsin, neutral and alkaline microbial proteases but suffer from complicated operation, limited bating efficiency and unsatisfactory leather performance. Therefore, devising a new pelt bating approach to achieve high bating efficiency and excellent leather performance has always been wished for by the leather industry. To pursue this goal, years of persistent research work enabled us to develop a novel approach for pelt bating by means of acidic proteases in pickling process. Initially, basic enzymatic characteristics and bating effectiveness of several typical acidic proteases in pelt pickling medium were investigated; then, the bating effectiveness through the quantitative characterization of protease activity of the optimal acidic protease was compared with that of the conventional bating enzyme. The results indicated that all of the selected acidic proteases had good salt-tolerance and exhibited optimum activity at pH 3.0–4.0. The novel pickling-bating method based on microbial origin acidic protease L80A led to an outstanding performance on pelt bating at the dosage of 150 U/mL of collagenolytic activity. The bating effectiveness of acidic protease L80A was comparable to and even better than that of trypsin BEM due to its moderate proteolytic ability. Moreover, the deep and even penetration of acidic protease in the pelt permitted it to produce soft, organoleptically stable and overall better quality crust leather than that of the conventional trypsin bating method. Additionally, pelt bating was performed along with the pickling process without extra inactivation and washing operation, making the bating operation more efficient, economical, and environment friendly. Results had made us to conclude that this cutting-edge acidic proteases based pickling-bating method could be the first step/ way forward to replace the decades-old traditional pelt bating technology. Note de contenu : - MATERIALS AND METHODS : Materials - Assay of proteolytic activity on casein substrate - Assay of proteolytic activity on collagen fiber substrate - Effect of salt concentration on the collagenolytic activity of acidic proteases - Bating pickling pelt with typical proteases - Comparison of the bating effectiveness of acidic protease L80A and trypsin BEM - Determination of soluble protein (SP) concentration in bating liquor - Determination of hydroxyproline concentration in bating liquor - Determination of chromium content in spent tanning liquors and wet blue - Histological analysis of collagen and elastin fiber - Scanning electron microscopy (SEM) analysis - Test of softness and physical properties of crust leather - RESULTS : Proteolytic characteristics of typical acidic proteases - Comparison bating effectiveness of different acidic proteases in pickling process - Relationship between collagenolytic activity and bating effect of pickling pelts - Comparison of bating effectiveness of the novel pickling-bating and conventional trypsin bating method - Table 1 The selected proteases - Table 2 Enzymatic characteristics of acidic proteases (25 ℃, pH 3.5) - Table 3 Amounts of proteases, soluble protein, hydroxyproline in the bating liquor and the softness of crust leather treated by the same dosage of caseinolytic activity (25℃, pH 3.5) - Table 4 Amounts of proteases, soluble protein, hydroxyproline in the bating liquor and the softness of crust leather treated by the same dosage of collagenolytic activity (25℃, pH 3.5) - Table 5 Relation of the softness and physical properties of the crust leathers to the collagenolytic activity of protease L80A (25℃, pH 3.5) - Table 6 Amounts of protease and testing results of the effluents and crust leathers DOI : https://doi.org/10.1186/s42825-021-00068-x En ligne : https://link.springer.com/content/pdf/10.1186/s42825-021-00068-x.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37552 [article]

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Chicken feather protein for the thermal stability and combustion performance of rigid polyurethane foam / Xu Zhang in INTERNATIONAL POLYMER PROCESSING, Vol. 38, N° 5 (2023)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. 38, N° 5 (2023) . - p. 593-635 Titre : Chicken feather protein for the thermal stability and combustion performance of rigid polyurethane foam Type de document : texte imprimé Auteurs : Xu Zhang, Auteur ; Simiao Sun, Auteur ; Dehe Yuan, Auteur ; Zhi Wang, Auteur ; Hua Xie, Auteur ; Zhanpeng Su, Auteur Année de publication : 2023 Article en page(s) : p. 593-635 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Combustion Énergie d'activation L'énergie d'activation est la quantité d'énergie nécessaire pour lancer un processus chimique, le plus souvent une réaction. En effet, pour démarrer un processus, on doit souvent faire face à une barrière énergétique (c’est-à-dire apporter un minimum d'énergie pour le démarrage). Cette quantité est exprimée, selon le système international d'unités, en kJ/mol (kilojoules par mole de réactif). Mousses plastiques Mousses plastiques -- Propriétés thermiques Plumes Polyuréthanes Protéines animales Stabilité thermique Index. décimale : 668.4 Plastiques, vinyles Résumé : Rigid polyurethane foams (RPUFs) were synthesized with chicken feather protein using the “one-step method” of all-water foaming. Thermogravimetry, pyrolysis kinetics analysis, Cone calorimetry and smoke density (Ds) were used to investigate the effects of chicken feather protein on thermal stability and combustion performance of RPUFs. The results showed that the modified RPUFs with 2.5 wt% chicken feather protein (RPUF-CF1) had the lowest mass loss, the highest integrated program pyrolysis temperature, the highest activation energy, the lowest Ds (13.3), the highest light transmittance (79.3 %), the lowest heat release rate (22.0 kW/m2 and 30.6 kW/m2) and total heat release (2.4 MJ/m2 and 2.8 MJ/m2), which indicated that RPUF-CF1 had better thermal stability and combustion performance. The current research results provide a useful reference for the preparation of RPUFs with good thermal stability by bio-based modification. Note de contenu : - EXPERIMETAL : Materials - Preparation of chicken feather protein - Preparation of flame retardant RPUF - Measurements and characterization - RESULTS AND DISCUSSION : Thermal weight loss analysis - IPDT analysis - Pyrolysis kinetics analysis - Smoke density - Flame retardancy mechanism - Table 1 : Pyrolysis temperature parameters of the RPUFs - Table 2 : Ther thermal weight loss temeprature data of the RPUFs - Table 3 : Pyrolysis kinetic parameters of the RPUFs at different conversion rates with Flynn-Wall-Ozawa method - Table 4 : Pyrolysis kinetic data of the RPUFs with Coats Redfern method at different heating rates - Table 5 : Pyrolysis kinetic parameters of at three heating rated with Kissinger method - Table 6 : Pyrolysis kinetic parameters of RPUFs at different conversion rates witgh the Starink method - Table 7 : Combustion parameters of RPUFs at different radiation intensity DOI : https://doi.org/10.1515/ipp-2023-4364 En ligne : https://drive.google.com/file/d/1N_u4lH9uM6iUCqVv3ypfp9SKuUqJVXck/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40291 [article]

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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]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVIII, N° 10 (10/2023) . - p. 428-438 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 Poids Index. 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 : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39941 [article]

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Enzymatic balting technology for wet blue : I. Characterization of protease activities towards chrome-tanned elastin and collagen fibers / Xu Zhang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 7 (07/2018)  

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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)  

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Fabrication of expandable graphite and soybean oil-based synergistic modified polyurethane foam with improved thermal stability and flame retardant properties / Xu Zhang in INTERNATIONAL POLYMER PROCESSING, Vol. 39, N° 2 (2024)  

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Fabrication of flame-retardant and smoke-suppressant rigid polyurethane foam modified by hydrolyzed keratin / Xu Zhang in INTERNATIONAL POLYMER PROCESSING, Vol. 38, N° 2 (2023)  

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Fabrication of soybean oil-based polyol modified polyurethane foam from ammonium polyphosphate and its thermal stability and flame retardant properties / Xu Zhang in INTERNATIONAL POLYMER PROCESSING, Vol. 39, N° 1 (2024)  

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Impact of acrylic polymer molecular weight and groups on physicochemical properties and re-tanning effectiveness in leather manufacturing / Zhiyuan Zhu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIX, N° 9 (09/2024)  

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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)  

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A 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)  

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Preparation and application of modified corn straw as a biosorbent for Cr(VI) adsorption / Zeng Chunhui in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 4 (07-08/2019)  

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Preparation 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)  

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A 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)  

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Removal of proteoglycans in animal hides by glycosidase to promote opening-up of collagen fiber bundles : optimization of glycosidase and its application in the soaking process / Xiang Zhong in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 2 (02/2023)  

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Resource 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)  

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Study on flame retardancy and thermal stability of rigid polyurethane foams modified by amino trimethylphosphonate cobalt and expandable graphite / Bing Liu in INTERNATIONAL POLYMER PROCESSING, Vol. 38, N° 2 (2023)  

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Study on flame retardant properties and thermal stability of synergistically modified polyurethane foam with ammonium polyphosphate and barium phytate / Gaojie Ding in INTERNATIONAL POLYMER PROCESSING, Vol. 39, N° 3 (2024)  

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