Accueil
Détail de l'auteur
Auteur Venkatasubramanian Sivakumar |
Documents disponibles écrits par cet auteur
Ajouter le résultat dans votre panier Affiner la recherche
Analysis of pore-size and related parameters for leather matrix through capillary flow porosimetry technique / Venkatasubramanian Sivakumar in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 99, N° 1 (01-02/2015)
[article]
Titre : Analysis of pore-size and related parameters for leather matrix through capillary flow porosimetry technique Type de document : texte imprimé Auteurs : Venkatasubramanian Sivakumar, Auteur ; Akshaya Jena, Auteur ; Krishna Gupta, Auteur ; Asit Baran Mandal, Auteur Année de publication : 2015 Article en page(s) : p. 16-22 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : 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.
Porosimétrie d'écoulement capillaire
Porosité
Taille des pores
Tannage au chrome
Tannage végétalIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Leather processing involves diffusion of various chemicals through the pores of skin/leather matrix. Pore-size of the matrix has significant impact on the diffusion rates of the substances involved. The determination of pore-sizes and related parameters is necessary for an understanding of the diffusion phenomena in leather processing and related techniques. There are some limitations in existing pore-size measurement techniques for natural fibrous materials like leather; hence there is a need for development of novel techniques with non-influencing character on structure of materials like leather. In this regard, a capillary flow porosimetry technique for pore-size measurement has been applied to two types of leather viz., full-chrome crust leather (FCC) and vegetable-tanned crust (VTC). By utilizing the capillary flow porosimetry technique, important pore-size parameters such as smallest, largest and mean pore-size plus porosity and average Darcy permeability have been determined. The respective values are 0.04p, 0.93p, 0.13p, 59.1% and 0.027 respectively for FCC leather and 0.04p, 0.67p, 0.11p, 49.9% and 0.021 for VTC leather. The results indicate that FCC leather has greater porosity compared to VTC leather; possibly due to chrome tanning providing less filling effect compared to vegetable tanning. Note de contenu : - LIMITATIONS OF EXISTING POROSIMETRY TECHNIQUES : Capillary flow porosimetry technique (CPF) : principle
- CPF TECHNIQUES
- APPLICATION OF CPF FOR DETERMINING PORE-SIZE PARAMETERS IN LEATHER MATRIX : Structure of leather
- MATERIALS AND METHODS
- RESULTS AND DISCUSSION : Flow rate vs. pressure - Cumulative filter flow vs. pore diameter - Pore size distribution vs. pore diameter - Number pore size distribution vs. average pore diameter - Surface area - Pore-size parametersEn ligne : https://drive.google.com/file/d/1fGKd1bf8KpV_CnsPhEfuyphKtiGyq6x2/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23229
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 99, N° 1 (01-02/2015) . - p. 16-22[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 16961 - Périodique Bibliothèque principale Documentaires Disponible Analysis of process safety and occupational health in leather Process industry : A Holistic approach / Venkatasubramanian Sivakumar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVI, N° 12 (12/2021)
[article]
Titre : Analysis of process safety and occupational health in leather Process industry : A Holistic approach Type de document : texte imprimé Auteurs : Venkatasubramanian Sivakumar, Auteur Année de publication : 2021 Article en page(s) : p. 428-434 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Air intérieur -- Pollution
Conditions de travail
Cuirs et peaux -- Industrie
Hygiène du travail
Pollution par le bruit
Produits chimiques -- Toxicologie
Risques pour la santé
Sécurité du travail
Travailleurs -- ProtectionIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Process Safety and Occupational health (PSOH) aspects in process industries are essential and need more consideration along with development in manufacturing and processing. In this regard, PSOH aspects are essential for the leather industry in order to prevent health hazards associated with it and improve upon adequate measures. Better safeguards and practices are necessary in PSOH for the benefit of not only for people working in the industry but for the environment at large. The situation is significant wherever hazardous chemicals or chemicals which could lead to compromise on safety in the workplace are involved. The degree of toxicity or hazard and exposure limit associated for some of them, inside factory premises are of major concern. In addition to the chemicals, other aspects such as dusts, noise levels, lighting, ergonomics, ventilation, personal safety and hygiene are worth considering. As mentioned above, the present paper analyzes various aspects of PSOH in leather process industries as a holistic approach. Note de contenu : - INTRODUCTION : Ammonia generation in deliming processing - Environnemental and health hazards associated with ammonia - Odor causing gaes in the tannery - Toxic gas generation in drains
- OCCUPATIONAL HAZARDS IN LEATHER INDUSTRY AND POSSIBLE SOLUTIONS : Solutions to air pollution in tannery environement - Particulate matters hazard - Noise pollution in leather and leather products industries - Safety personal protective equipment - Mechanical and electrical hazards
- Table 1 : General chemical utilization levels in leather processing based on mass balance (% based on skin/plet/sammed wet-blue weight)
- Table 2 : Material safety and toxicity date for major chemicals employed in various unit operations in leather processing
- Table 3 : Exposure limits and health factors associated with ammonia gas
- Table 4 : Major odorous gases emanating from various unit operations in leather processing
- Table 5 : Major VOC causing gases caused in various unit operations causing and their PEL's (Permissible Exposure Limit) for 8-hour TWA ( Time Weighted Average)
- Table 6 : Details of particulate matter emanating from tannery causing dust pollution
- Table 7 : The national noise pollution (regulation and control) rules, 2000, India on ambient air quality standards in respect of noise
- Table 8 : List safety personal protective equipment for various unit operations in leather or leather productsDOI : https://doi.org/10.34314/jalca.v116i12.4687 En ligne : https://drive.google.com/file/d/1rQBSY5B59autJRkB9CDt3Zk79eIdNuFJ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36782
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVI, N° 12 (12/2021) . - p. 428-434[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 23135 - Périodique Bibliothèque principale Documentaires Disponible Application of power ultrasound in the fatliquoring process / Venkatasubramanian Sivakumar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. C, N° 5 (05/2005)
[article]
Titre : Application of power ultrasound in the fatliquoring process Type de document : texte imprimé Auteurs : Venkatasubramanian Sivakumar, Auteur ; P. G. Rao, Auteur ; G. Swaminathan, Auteur Année de publication : 2005 Article en page(s) : p. 187-195 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Fatliquoring experiments have been carried out with ultrasound under stationary conditions and compared with the process in the absence of ultrasound under stationary as well as dynamic drumming condition. Type of fatliquors such as vegetable, semi synthetic and synthetic fatliquors have been studied. Variation in process parameters like ultrasonic output power, amount of fatliquor, and temperature have also been studied. The results show improvement about 2.5, 1.8, 1.5 times in the fat uptake in leather due to ultrasound for vegetable, semi synthetic and synthetic based fatliquors respectively. The observed order of improvement, vegetable > synthetic fatliquor is in agreement with the hindrance generally expected for fatliquors during penetration as indicated by emulsion particle size and Gel Permeation Chromatography (GPC) data. Therefore, ultrasound is useful for more difficult fatliquoring conditions. The results also indicate that ultrasound under stationary conditions is comparable or better than dynamic drumming conditions. The effects of ultrasound due to pre-sonication and on the viscosity of the fatliquor have also been studied. Leather fiber stricture has been analyzed using Scanning Electron Microscopy (SEM) and found to be more regular and improved by ultrasound aided processing. The studies indicate ultrasound promotes effective emulsification of the fatliquor in water systems rendering better penetration and more uniform distribution through the leather matrix. En ligne : https://drive.google.com/file/d/1m_KAS6enFsf1LaFgGKXa8k_DP2hl_vJy/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4066
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. C, N° 5 (05/2005) . - p. 187-195[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 002056 - Périodique Bibliothèque principale Documentaires Disponible Approaches towards tannery modernization and up-gradation : leather industry 4.0 : multi-disciplinary approach / Venkatasubramanian Sivakumar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVI, N° 2 (02/2021)
[article]
Titre : Approaches towards tannery modernization and up-gradation : leather industry 4.0 : multi-disciplinary approach Type de document : texte imprimé Auteurs : Venkatasubramanian Sivakumar, Auteur Année de publication : 2021 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuirs et peaux -- Industrie -- Aspect de l'environnement
Déchets -- Réduction
Industrie 4.0Le concept d’Industrie 4.0 correspond à une nouvelle façon d’organiser les moyens de production : l’objectif est la mise en place d’usines dites "intelligentes" ("smart factories") capables d’une plus grande adaptabilité dans la production et d’une allocation plus efficace des ressources, ouvrant ainsi la voie à une nouvelle révolution industrielle. Ses bases technologiques sont l'Internet des objets et les systèmes cyber-physiques.
Innovations
Manutention
Matériaux -- Stockage
Produits chimiques -- StockageIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Analysis of various approaches for tannery modernization and up-gradation as leather industry 4.0 need to be analyzed keeping in view of significant advancements made in different disciplines of relevance to leather sector. Holistic views and plans for cleaner image with better environmental aspects are essential for the sustainable growth of the leather sector. In this paper, various plans and strategies for the next phase of tannery modernization denoted as TAN MOD 4.0 have been presented with the main objectives of near zero discharge of chemicals, waste minimization, value addition, productivity enhancement and safe & healthy environment in tannery. Different components such as basic up-gradation concepts, modem leather processing techniques and engineering inputs for leather sector such as process control systems, necessary automation tools and Internet of Things (IoT) are discussed. Note de contenu : - Tannery modernization of initial phase
- Industry 4.0
- Un-filled gaps in tannery modernization
- Tannery modernization 4.0 : Objectives
- Benefits envisaged from TAN MOD 4.0
- Engineering for leather process (ENGG-LEAP)
- Materials storage facility
- Materials handling facility
- Modern leather processing techniques (LEAPRO)
- Environmental, health and safety (EHS)
- Fig. 1 : Schematic plan for tannery modernization - TAN-MOD 4.0
- Fig. 2 : Approaches for tannery up-gradation and modernization in leather sector TAN MOD 4.0 as sustainable solutionDOI : https://doi.org/10.34314/jalca.v116i2.4237 En ligne : https://drive.google.com/file/d/1hxEWJaRYHvFeGydnJoS7UOMebG4To_at/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35310
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVI, N° 2 (02/2021)[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 22600 - Périodique Bibliothèque principale Documentaires Disponible Clean bill of health and safety / Venkatasubramanian Sivakumar in LEATHER INTERNATIONAL, Vol. 217, N° 4850 (05/2015)
[article]
Titre : Clean bill of health and safety Type de document : texte imprimé Auteurs : Venkatasubramanian Sivakumar, Auteur ; Rames Chandra Panda, Auteur Année de publication : 2015 Article en page(s) : p. 39-41 Langues : Anglais (eng) Catégories : Air intérieur -- Pollution
Ammoniac
Bruit -- Lutte contre
Cuirs et peaux -- Industrie -- Aspect de l'environnement
Equipement de protection individuelle
Risques pour la santé
Sécurité du travail
Toxicologie industrielleIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Occupational safety and health (OSH) in leather-processing industries is of paramount importance, and requires attention with a focus on manufacturing and processing. In this regard, aspects to prevent health hazards and improve on adequate measures in OSH are essential for the leather industry. Better safeguards and practices are necessary in OSH for the benefit of not just people working in the industry, but also for the environment.
The situation is significant wherever toxic chemicals or hazards are associated with the industry. The degree of toxicity or hazard and exposure limit associated with it inside the factory premises are of particular concern. In addition to the hazardous chemicals, other aspects such as toxic gases, particulate matter, noise levels, personal safety, mechanical/ electrical safety and safety audit systems are also worth considering.Note de contenu : - Aspects of OHS specific to the leather industry
- Ammonia generation in the deliming processing
- Environmental and health hazards associated with ammonia
- Odour-causing gases in tannery
- Toxic gases in drains
- Solutions to air pollution in the tannery environment
- Particulate matters hazard
- Noise pollution in leather and leather products industries
- Personal protective equipment
- Mechanical and electrical hazards in manufacturing
- Safety audit
- TABLES : 1. Exposure limits and health factors associated with ammonia gas - 2. Major odorous gas emanating from various unit operations in leather processing - 3. Details of particulate matters emanating from tannery causing dust pollution - 4. Typical noise levels produced from machinery for the leather and foot wear industry - 5. The National pollution (regulation and control) rules, 2000, India, for ambient air quality standards in respect of noise - 6. Personal protective equipment for various unit operations for leather or leather products manufacturingEn ligne : https://drive.google.com/file/d/1G11ieYobiFAGx-H6yA3CTcn3_l_RVfIP/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24244
in LEATHER INTERNATIONAL > Vol. 217, N° 4850 (05/2015) . - p. 39-41[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 17250 - Périodique Bibliothèque principale Documentaires Disponible Diffusion rate enhancement in leather dyeing with power ultrasound / Venkatasubramanian Sivakumar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVIII, N° 6 (06/2003)
PermalinkInfluence of ultrasound on the adsorption, diffusion and kinetics of leather dyeing process : mechanistic insight / Venkatasubramanian Sivakumar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 7 (07/2020)
PermalinkA novel pickle-free high exhaust chrome tanning method-an appproach for tota dissolved solids management / Victor John Sundar in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 6 (11-12/2004)
PermalinkPreparation and characterization of nano-reinforced leather waste fiber-epoxy nano composite / Venkatasubramanian Sivakumar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 12 (12/2015)
PermalinkRemediation of spent vegetable tannins from waste tanning liquor through coagulation and ultrasound pre-treatment : a sustainable approach / Resmi Mohan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 9 (09/2022)
PermalinkTitanium/chrome combination tannage : an alternative eco-friendly tanning system for upper leather manufacture / Venkatasubramanian Sivakumar in LEATHER INTERNATIONAL, Vol. 210, N° 4785 (06/2008)
PermalinkUltrasound assisted diffusion in vegetable tanning for leather processing / Venkatasubramanian Sivakumar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIII, N° 10 (10/2008)
PermalinkUltrasound assisted enhancement in wattle bark (Acacia Mollissima) vegetable tanning extraction for leather processing / Venkatasubramanian Sivakumar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIV, N° 11 (11/2009)
PermalinkUltrasound-assisted process intensification in leather making : diffusion rate enhancement in retanning process / Venkatasubramanian Sivakumar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 7 (07/2013)
PermalinkUltrasound assisted vegetable tannin extraction from myrobalan nuts for leather application / Venkatasubramanian Sivakumar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 2 (02/2018)
PermalinkUse of ultrasound in soaking for improved efficiency / Venkatasubramanian Sivakumar in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 6 (11-12/2004)
Permalink