Journal of The American Leather Chemists Association最新文献_第7页

Evaluation of Antifungal Activity of Carbonate Solvent – Part:1 碳酸盐溶剂抗真菌活性的评价——第1部分

IF 0.9 4区工程技术

Journal of The American Leather Chemists Association Pub Date : 2021-11-01 DOI: 10.34314/jalca.v116i11.4661

M. Sathish, D. Seeniammal, R. Poornima, J. Rao

引用次数: 0

Fabrication of Composite Films Based on Chitosan and Vegetable-Tanned Collagen Fibers Crosslinked with Genipin 壳聚糖与植物鞣胶原纤维交联制备复合膜

IF 0.9 4区工程技术

Journal of The American Leather Chemists Association Pub Date : 2021-10-01 DOI: 10.34314/jalca.v116i10.4616

Jie Liu, Yanchun Liu, E. M. Brown, Zhengxin Ma, Cheng‐Kung Liu

{"title":"Fabrication of Composite Films Based on Chitosan and Vegetable-Tanned Collagen Fibers Crosslinked with Genipin","authors":"Jie Liu, Yanchun Liu, E. M. Brown, Zhengxin Ma, Cheng‐Kung Liu","doi":"10.34314/jalca.v116i10.4616","DOIUrl":"https://doi.org/10.34314/jalca.v116i10.4616","url":null,"abstract":"The leather industry generates considerable amounts of solid waste and raises many environmental concerns during its disposal. The presence of collagen in these wastes provides a potential protein source for the fabrication of bio-based value-added products. Herein, a novel composite film was fabricated by incorporating vegetable-tanned collagen fiber (VCF), a mechanically ground powder-like leather waste, into a chitosan matrix and crosslinked with genipin. The obtained composite film showed a compact structure and the hydrogen bonding interactions were confirmed by FTIR analysis, indicating a good compatibility between chitosan and VCF. The optical properties, water absorption capacity, thermal stability, water vapor permeability and mechanical properties of the composite films were characterized. The incorporation of VCF into chitosan led to significant decreases in opacity and solubility of the films. At the same time, the mechanical properties, water vapor permeability and thermal stability of the films were improved. The composite film exhibited antibacterial activity against food-borne pathogens. Results from this research indicated the potential of the genipin-crosslinked chitosan/VCF composites for applications in antimicrobial packaging. ","PeriodicalId":17201,"journal":{"name":"Journal of The American Leather Chemists Association","volume":"45 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86320928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Role of Anionic Chromium Species in Leather Tanning 阴离子铬在皮革制革中的作用

IF 0.9 4区工程技术

Journal of The American Leather Chemists Association Pub Date : 2021-10-01 DOI: 10.34314/jalca.v116i10.4618

Abhinandan Kumar, J. Alla, Deepika Arathanaikotti, J. Raj, N. K. Chandrababu

引用次数: 0

Solid State NMR Analysis for Hide Powder Tanned by Aluminum, Silicon and Phosphorus Tanning Agents before and after Hydrothermal Denaturation 水热变性前后铝、硅、磷鞣剂鞣制兽皮粉的固体核磁共振分析

IF 0.9 4区工程技术

Journal of The American Leather Chemists Association Pub Date : 2021-10-01 DOI: 10.34314/jalca.v116i10.4615

J. Liu, D. He, Cheng Hualin, K. Ding

引用次数: 0

Avoiding the Production of Polluting and Toxic Chemicals in the Tanning Process 避免在制革过程中产生污染和有毒化学品

IF 0.9 4区工程技术

Journal of The American Leather Chemists Association Pub Date : 2021-10-01 DOI: 10.34314/jalca.v116i10.4617

J. Morera, E. Bartolí, Patricia Rojas, L. Cabeza

{"title":"Avoiding the Production of Polluting and Toxic Chemicals in the Tanning Process","authors":"J. Morera, E. Bartolí, Patricia Rojas, L. Cabeza","doi":"10.34314/jalca.v116i10.4617","DOIUrl":"https://doi.org/10.34314/jalca.v116i10.4617","url":null,"abstract":"Polluting and potentially toxic chemicals are used in tanning. Sodium sulfide/hydrosulfide are used when the hides are unhaired. These chemicals can be transformed into hydrogen sulfide with a simple change of pH. This gas is highly toxic and is the recurring cause of many deaths and accidents due to suffocation of workers in tanneries around the world. The basic salts of chromium III are the most used chemical to tan. The chromium III used can be transformed by oxidation, even once the leather transformed into a consumer good (shoes, for example), in chromium VI, which is carcinogenic. Both chemicals are present in process floats, in residual floats and in solid waste generated. Chromium III is also present in manufactured leathers. This article aims to describe the problems associated with the use of the aforementioned hazardous materials and deepen the possibility of using less toxic alternative processes to tan. The designed process allows to significantly reduce the pollutant load of the discharged wastewater, facilitates the reuse of the solid waste generated and clearly improve the safety of people at work.","PeriodicalId":17201,"journal":{"name":"Journal of The American Leather Chemists Association","volume":"2006 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86959893","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Treatment of Slaughterhouse Wastewater by Integrated Anaerobic/Aerobic Bioreactors Loaded with Immobilized Nanoporous Activated Carbon 负载固定化纳米多孔活性炭的厌氧/好氧一体化生物反应器处理屠宰场废水

IF 0.9 4区工程技术

Journal of The American Leather Chemists Association Pub Date : 2021-09-07 DOI: 10.34314/jalca.v116i9.4400

P. Maharaja, M. Mahesh, N. Patchaimurugan, S. Swarnalatha, G. Sekaran

{"title":"Treatment of Slaughterhouse Wastewater by Integrated Anaerobic/Aerobic Bioreactors Loaded with Immobilized Nanoporous Activated Carbon","authors":"P. Maharaja, M. Mahesh, N. Patchaimurugan, S. Swarnalatha, G. Sekaran","doi":"10.34314/jalca.v116i9.4400","DOIUrl":"https://doi.org/10.34314/jalca.v116i9.4400","url":null,"abstract":"Slaughterhouse wastewater consists of moderate to high strength complex wastewater comprising about 45% soluble and 55% coarse suspended organics exhibiting high COD and BOD levels. Conventional wastewater treatment methods cannot effectively treat slaughterhouse wastewater. Thus, a four-stage sequential anaerobic/aerobic immobilized bio reactor system comprising a two stage Fluidized Anaerobic immobilized Reactor (FAIR – I and FAIR – II), a Fluidized Immobilized Cell Carbon Oxidation (FICCO) reactor and a Chemo Autotrophic Activated Carbon Oxidation (CAACO) reactor was tested in a slaughterhouse treating wastewater between 3 m3 /day to 17 m3 /day. Nanoporous activated carbon (NPAC) was used for the immobilization of microorganisms in all of the reactors. The NPAC BET surface area was found to be 291 m2/g with the average pore diameter of 28 Å. Spin density (free electrons) in the NPAC, was calculated to be 16 x 1018 spins/g using ESR spectroscopy. The overall NH3-N, TKN, COD and BOD removal efficiency was 64%, 71%, 82% and 85% respectively. Multivariate analysis (PCA and cluster analysis) found that the COD removal by the FICCO and CAACO reactors is more efficient than the FAIR reactors. The treatment was confirmed through UV-visible and UV-fluorescence spectroscopic analysis.","PeriodicalId":17201,"journal":{"name":"Journal of The American Leather Chemists Association","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88703057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Metal-Free Combination Tanning with Replenishable Polyphenols and Marine Oil 无金属组合鞣制与补充多酚和海洋油

IF 0.9 4区工程技术

Journal of The American Leather Chemists Association Pub Date : 2021-09-07 DOI: 10.34314/jalca.v116i9.4398

V. Sundar, C. Muralidharan

{"title":"Metal-Free Combination Tanning with Replenishable Polyphenols and Marine Oil","authors":"V. Sundar, C. Muralidharan","doi":"10.34314/jalca.v116i9.4398","DOIUrl":"https://doi.org/10.34314/jalca.v116i9.4398","url":null,"abstract":"In line with the resurgence of natural products in the global manufacturing industry, the leather industry is also relooking the increased use of organic materials. To exploit the benefits of the vegetable tanning materials and to couple with suitable organic material for overcoming the inherent shortcomings of vegetable tanning materials, studies were undertaken. Tanning materials like raw fish oil have advantageous properties to impart on leather such as softness, lightweight, and washability characteristics. Hence studies were undertaken on polyphenol-fish oil combination tannages. \u0000The quantities of wattle and fish oil and process conditions were standardized. The study indicated that the oxidation of fish oil could take place in the presence of vegetable tannins. The leathers tanned by this combination tanning system could be converted into garment leathers of rich shades and possessed good strength and physical properties. Propelled by encouraging results, investigations were also made on the nature of interaction between vegetable tannins and fish oil with collagen. It was also observed that the vegetable tannins probably do not hinder the oxidation of oil. To sum up, the study leads to the development of a viable, versatile organic tanning system to gain eco-acceptability for the leather manufacturing process.","PeriodicalId":17201,"journal":{"name":"Journal of The American Leather Chemists Association","volume":"46 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82691388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Studies on the Development of Benzoyl Peroxide Catalysed Rapid Oil Tanning using Linseed Oil 过氧化苯甲酰催化亚麻籽油快速制革的研究

IF 0.9 4区工程技术

Journal of The American Leather Chemists Association Pub Date : 2021-09-07 DOI: 10.34314/jalca.v116i7.4335

B. Sahu, J. Alla, G. Jayakumar

引用次数: 1

Biocolorant for Leather Dyeing Applications: An Eco-benign Evaluation of Natural Coloring Agent 皮革染色用生物着色剂:天然着色剂的生态评价

IF 0.9 4区工程技术

Journal of The American Leather Chemists Association Pub Date : 2021-09-07 DOI: 10.34314/jalca.v116i9.4397

C. Kurinjimalar, G. Jayakumar, A. Selvi, R. Venba, Malathy Jawhar, S. Kanth

{"title":"Biocolorant for Leather Dyeing Applications: An Eco-benign Evaluation of Natural Coloring Agent","authors":"C. Kurinjimalar, G. Jayakumar, A. Selvi, R. Venba, Malathy Jawhar, S. Kanth","doi":"10.34314/jalca.v116i9.4397","DOIUrl":"https://doi.org/10.34314/jalca.v116i9.4397","url":null,"abstract":"Exploration of biocolorant in leather industry is explored widely owing to its environmental limitation. Besides, employing synthetic dyes in leather process requires high end of pipe treatment due to their complex chemical structure. Therefore, an attempt has been made on exploiting madder root dye (Rubia cordifolia L.) for leather dyeing application. The effect of varying pretreatment regimen on madder colorant extraction, chemical characterizations (including UV-Vis, IR, particle size, zeta potential value, and thermal studies) and optimum operating leather dyeing conditions are studied. The results revealed dissolving medium pH 5, 100oC, and 60 min duration of extraction is optimum. Thus, obtained dye characteristics showed maximum absorption peak at 460 nm, with an average particle size of 166 nm. It also shows a negative zeta potential value of -5.31 which is indicative for dyeing application. The optimum leather dyeing is found at leather pH 5.5, 10% dye concentration and 4 h duration. At optimum dyeing parameters it shows good fastness, perspiration, organoleptic properties without affecting the physical characteristic. Novelty of the present research would lead to develop eco-dyeing method in leather manufacture. Moreover, the study unravels a new application of eco-benign dye to achieve sustainable process. ","PeriodicalId":17201,"journal":{"name":"Journal of The American Leather Chemists Association","volume":"2 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75994013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Hydrogen Peroxide-oxidized Soybean Polysaccharides as Novel Masking Agents for Zirconium Tanning 过氧化氢氧化大豆多糖作为新型锆鞣掩蔽剂的研究

IF 0.9 4区工程技术

Journal of The American Leather Chemists Association Pub Date : 2021-09-07 DOI: 10.34314/jalca.v116i7.4337

Haolin Zhu, Fang-Fang Wang, K. Tang, Jie Liu, Xuejing Zheng, S. Qin

{"title":"Hydrogen Peroxide-oxidized Soybean Polysaccharides as Novel Masking Agents for Zirconium Tanning","authors":"Haolin Zhu, Fang-Fang Wang, K. Tang, Jie Liu, Xuejing Zheng, S. Qin","doi":"10.34314/jalca.v116i7.4337","DOIUrl":"https://doi.org/10.34314/jalca.v116i7.4337","url":null,"abstract":"A series of hydrogen peroxide-oxidized soybean polysaccharides (HPS) were prepared using H2O2 and copper catalyst, which were then used as novel masking agents for zirconium tanning. The HPS samples were characterized by Fourier transforms infrared (FT-IR) spectroscopy, dynamic light scattering (DLS), and X-ray diffraction (XRD). FT-IR suggested the formation of carbonyl and carboxyl groups after hydrogen peroxide oxidation. DLS indicated that the HPS particle size decreases with increasing the H2O2 dosage. HPS with carbonyl and carboxyl groups and medium particle size was able to coordinate with zirconium to remarkably facilitate the tanning process. The shrinkage temperature of the tanned leather reached 92oC. Meanwhile, the fullness, softness, and mechanical properties of the leather were greatly improved by the tanning. The function of HPS and its interaction with zirconium were studied by FT-IR, XRD, and it was found that the triple helical structures of collagen fiber were not changed greatly. Scanning electron microscopy (SEM) showed that collagen fibers were dispersed and tanning agents were evenly distributed in collagen fibers. A new strategy for chromefree tanning is suggested and a strong support for the application of zirconium tanning is provided.","PeriodicalId":17201,"journal":{"name":"Journal of The American Leather Chemists Association","volume":"66 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76444913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1