Journal of Leather Science and Engineering最新文献_第9页

Polyphenol based hybrid nano-aggregates modified collagen fibers of biological valve leaflets to achieve enhanced mechanical, anticoagulation and anti-calcification properties 多酚基杂化纳米聚集体修饰生物瓣膜小叶的胶原纤维，实现增强的机械、抗凝血和抗钙化性能

Journal of Leather Science and Engineering Pub Date : 2022-10-23 DOI: 10.1186/s42825-022-00105-3

Shufen Li, Shiying Lang, Zhiqian Chen, Jing-Heng Chen, Weihua Zhuang, Yangrui Du, Yawen Yao, Gongyan Liu, Mao Chen

引用次数: 1

Optimization and application of UVC irradiation for prevention of fungal biodeterioration of vegetable tanned and chrome tanned leather 紫外线照射防止植物鞣革和铬鞣革真菌生物变质的优化及应用

Journal of Leather Science and Engineering Pub Date : 2022-10-21 DOI: 10.1186/s42825-022-00104-4

Eshita Jhahan, Subarna Bhattacharyya, Anirban Chaudhuri, Nirmal Sarkar, Shaheen Akhtar, Punarbasu Chaudhuri

{"title":"Optimization and application of UVC irradiation for prevention of fungal biodeterioration of vegetable tanned and chrome tanned leather","authors":"Eshita Jhahan, Subarna Bhattacharyya, Anirban Chaudhuri, Nirmal Sarkar, Shaheen Akhtar, Punarbasu Chaudhuri","doi":"10.1186/s42825-022-00104-4","DOIUrl":"10.1186/s42825-022-00104-4","url":null,"abstract":"<div><p>UV-C irradiation critically effects the growth of micro-fungi and also deteriorate leather materials. In the present study vegetable tanned and chrome tanned leather were infected with pure cultures of <i>Aspergillus niger</i> and <i>Aspergillus flavu</i>s, which were isolated from stored leather materials. UV-C light (λ = 254 nm) was applied on infected leather for 15 and 60 min. The changes in leather qualities were examined through weight, tensile strength, scanning electron microscope, energy dispersive X-ray and Fourier transform infrared spectroscopy study after 15 and 30 days of fungal inoculation. Vegetable tanned leather was more vulnerable in case of fungal attack than chrome tanned leather while <i>A. flavus</i> showed more influence on leather deterioration than <i>A. niger.</i> The results showed that weight loss after 30 days for 15 and 60 min irradiation exposure was 1.3% compared to <i>A. flavus</i> infected leather (3.93%). The tensile strength of vegetable and chrome tanned UV irradiated leather was increased by 44% and 7% respectively. The scanning electron microscopic images exhibit the limited presence of conidiophores in UV-C exposed leather which confirmed the potentiality of irradiation for controlling fungal growth. The infrared spectral analysis of UV-C exposed infected leather samples showed neither shifting of wavenumber nor displacement of any functional groups. Altogether the efficacy of UV-C irradiation against biodeterioration of leather was concluded to be effective. This method can be used to control fungal growth without compromising the leather quality.</p><h3>Graphical Abstract</h3>\u0000 <div><figure><div><div><picture><source><img></source></picture></div></div></figure></div>\u0000 </div>","PeriodicalId":640,"journal":{"name":"Journal of Leather Science and Engineering","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://JLSE.SpringerOpen.com/counter/pdf/10.1186/s42825-022-00104-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88056315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Organosilicon leather coating technology based on carbon peak strategy 基于碳峰策略的有机硅皮革涂层技术

Journal of Leather Science and Engineering Pub Date : 2022-10-19 DOI: 10.1186/s42825-022-00101-7

Wenkai Wang, Haojun Fan, Lijiang Song, Zhenya Wang, Heng Li, Jun Xiang, Qiang Huang, Xiangquan Chen

{"title":"Organosilicon leather coating technology based on carbon peak strategy","authors":"Wenkai Wang, Haojun Fan, Lijiang Song, Zhenya Wang, Heng Li, Jun Xiang, Qiang Huang, Xiangquan Chen","doi":"10.1186/s42825-022-00101-7","DOIUrl":"10.1186/s42825-022-00101-7","url":null,"abstract":"<div><p>Based on the demand of carbon peak and carbon emission reduction strategy, divinyl-terminated polydimethylsiloxane (<sup>Vi</sup>PDMS<sup>Vi</sup>), poly(methylhydrosiloxane) (PMHS), divinyl-terminated polymethylvinylsiloxane (<sup>Vi</sup>PMVS<sup>Vi</sup>), and fumed silica were used as primary raw materials, polydimethylsiloxane (PDMS) synthetic leather coating was in situ constructed by thermally induced hydrosilylation polymerization on the synthetic leather substrate. The effect of the viscosity of <sup>Vi</sup>PDMS<sup>Vi</sup>, the active hydrogen content of PMHS, the molar ratio of vinyl groups to active hydrogen, the dosage of <sup>Vi</sup>PMVS<sup>Vi</sup> and fumed silica on the performance of PDMS polymer coating, including mechanical properties, cold resistance, flexural resistance, abrasion resistance, hydrophobic and anti-fouling properties were investigated. The results show that <sup>Vi</sup>PDMS<sup>Vi</sup> with high vinyl content and PMHS with low active hydrogen content is more conducive to obtaining organosilicon coating with better mechanical properties, the optimized dosage of <sup>Vi</sup>PMVS<sup>Vi</sup> and fumed silica was 7 wt% and 40 wt%, respectively. In this case, the tensile strength and the broken elongation of the PDMS polymer coating reached 5.96 MPa and 481%, showing reasonable mechanical properties for leather coating. Compared with polyurethane based or polyvinyl chloride based synthetic leather, the silicon based synthetic leather prepared by this method exhibits excellent cold resistance, abrasion resistance, super hydrophobicity, and anti-fouling characteristics.</p><h3>Graphical Abstract</h3>\u0000 <div><figure><div><div><picture><source><img></source></picture></div></div></figure></div>\u0000 </div>","PeriodicalId":640,"journal":{"name":"Journal of Leather Science and Engineering","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://JLSE.SpringerOpen.com/counter/pdf/10.1186/s42825-022-00101-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74796761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

The improvement of dispersity, thermal stability and mechanical properties of collagen fibers by silane modification: an exploration for developing new leather making technology 硅烷改性提高胶原纤维的分散性、热稳定性和力学性能:开发皮革新工艺的探索

Journal of Leather Science and Engineering Pub Date : 2022-09-14 DOI: 10.1186/s42825-022-00100-8

Shuangfeng Xu, Hanzhong Xiao, Bi Shi

{"title":"The improvement of dispersity, thermal stability and mechanical properties of collagen fibers by silane modification: an exploration for developing new leather making technology","authors":"Shuangfeng Xu, Hanzhong Xiao, Bi Shi","doi":"10.1186/s42825-022-00100-8","DOIUrl":"10.1186/s42825-022-00100-8","url":null,"abstract":"<div><p>The effect of hydrophobic modification on the performances of collagen fibers (CFs) was investigated by using silane coupling agents with different alkyl chains as hydrophobic modifiers. It was found silane could be easily grafted onto CF surface through covalent bonds under 5% water content. This modification led to the transformation of surface wettability of CF from hydrophilic to hydrophobic. Interestingly, the change of surface wettability resulted in substantial improvement of the modified CF properties, presenting well dispersity of collagen fibers, higher thermal stability and enhanced mechanical properties in comparison with natural CF. The degree of improvement mainly depended on the length of alkyl chain in silane. Longer alkyl chain produced strong hydrophobicity and subsequently more superior performances of the modified CF. When the length of alkyl chain increased to 18 carbon atoms, the modified CF possessed durable superhydrophobicity even exposed to aqueous solutions of different pH, UV, and organic solvents, and had excellent thermal and mechanical properties like leather fibers. In general, this work clearly revealed that the properties of CF are closely and positively related to the hydrophobicity, which is suggestive in developing new leather making technology.</p><h3>Graphical Abstract</h3>\u0000 <div><figure><div><div><picture><source><img></source></picture></div></div></figure></div>\u0000 </div>","PeriodicalId":640,"journal":{"name":"Journal of Leather Science and Engineering","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://JLSE.SpringerOpen.com/counter/pdf/10.1186/s42825-022-00100-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89940576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

A review on room-temperature self-healing polyurethane: synthesis, self-healing mechanism and application 室温自愈聚氨酯的研究进展:合成、自愈机理及应用

Journal of Leather Science and Engineering Pub Date : 2022-08-30 DOI: 10.1186/s42825-022-00097-0

Yupeng Li, Yong Jin, Wuhou Fan, Rong Zhou

{"title":"A review on room-temperature self-healing polyurethane: synthesis, self-healing mechanism and application","authors":"Yupeng Li, Yong Jin, Wuhou Fan, Rong Zhou","doi":"10.1186/s42825-022-00097-0","DOIUrl":"10.1186/s42825-022-00097-0","url":null,"abstract":"<div><p>Polyurethanes have been widely used in many fields due to their remarkable features such as excellent mechanical strength, good abrasion resistance, toughness, low temperature flexibility, etc. In recent years, room-temperature self-healing polyurethanes have been attracting broad and growing interest because under mild conditions, room-temperature self-healing polyurethanes can repair damages, thereby extending their lifetimes and reducing maintenance costs. In this paper, the recent advances of room-temperature self-healing polyurethanes based on dynamic covalent bonds, noncovalent bonds and combined dual or triple dynamic bonds are reviewed, focusing on their synthesis methods and self-healing mechanisms, and their mechanical properties, healing efficiency and healing time are also described in detial. In addition, the latest applications of room-temperature self-healing polyurethanes in the fields of leather coatings, photoluminescence materials, flexible electronics and biomaterials are summarized. Finally, the current challenges and future development directions of the room-temprature self-healing polyurethanes are highlighted. Overall, this review is expected to provide a valuable reference for the prosperous development of room-temperature self-healing polyurethanes.</p><h3>Graphical abstract</h3>\u0000 <div><figure><div><div><picture><source><img></source></picture></div></div></figure></div>\u0000 </div>","PeriodicalId":640,"journal":{"name":"Journal of Leather Science and Engineering","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://JLSE.SpringerOpen.com/counter/pdf/10.1186/s42825-022-00097-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82799778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Essential role of isoelectric point of skin/leather in leather processing 皮革等电点在皮革加工中的重要作用

Journal of Leather Science and Engineering Pub Date : 2022-08-25 DOI: 10.1186/s42825-022-00099-y

Ya-nan Wang, Longyu Hu

引用次数: 7

Functional non-glutaraldehyde treated porcine pericardium for anti-coagulation, anti-calcification, and endothelial proliferation bioprosthetic heart valves 功能性非戊二醛处理的猪心包用于抗凝血、抗钙化和内皮细胞增殖生物人工心脏瓣膜

Journal of Leather Science and Engineering Pub Date : 2022-08-20 DOI: 10.1186/s42825-022-00098-z

Xiaotong Chen, Tao Yu, Qunshou Kong, Dajun Kuang, Hong Xu, Zhiyu Zhao, Li Yang, Gaocan Li, Haojun Fan, Yunbing Wang

{"title":"Functional non-glutaraldehyde treated porcine pericardium for anti-coagulation, anti-calcification, and endothelial proliferation bioprosthetic heart valves","authors":"Xiaotong Chen, Tao Yu, Qunshou Kong, Dajun Kuang, Hong Xu, Zhiyu Zhao, Li Yang, Gaocan Li, Haojun Fan, Yunbing Wang","doi":"10.1186/s42825-022-00098-z","DOIUrl":"10.1186/s42825-022-00098-z","url":null,"abstract":"<div><p>In the last decade, the number of transcatheter heart valve replacement for severe heart valve disease has increased exponentially. Although the bioprosthetic artificial heart valve (BHV) has similar fluid dynamics performance to the original heart valve compared with mechanical heart valve so that there is no need to take long-term anticoagulant drugs to prevent thromboembolism, transcatheter BHV replacement are still at risk for thrombosis during the first few months according to the clinical data. However, the use of antithrombotic drugs can also increase the risk of bleeding. Therefore, it is particularly important to improve the anticoagulant properties for the BHV itself. In this work, a kind of non-glutaraldehyde cross-linked BHV material with excellent antithrombotic ability has been prepared from carboxylated oxazolidine treated porcine pericardium (consisting of collagen, elastin and glycoprotein) with the further graft of the anticoagulant heparin sodium via hydrophilic modified chitosan. Along with the similar mechanical properties and collagen stability comparable to the glutaraldehyde cross-linked porcine pericardium (PP), these functional non-glutaraldehyde cross-linked PPs exhibit better biocompatibility, promoted endothelial proliferation and superior anti-calcification ability. More importantly, excellent anticoagulant activity can be observed in the hematological experiments in vivo and in vitro. In summary, these excellent performances make these functional non-glutaraldehyde cross-linked PPs great potentialities in the BHV applications.</p><h3>Graphical abstract</h3>\u0000 <div><figure><div><div><picture><source><img></source></picture></div></div></figure></div>\u0000 </div>","PeriodicalId":640,"journal":{"name":"Journal of Leather Science and Engineering","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://JLSE.SpringerOpen.com/counter/pdf/10.1186/s42825-022-00098-z","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76812321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

An exploration of enhancing thermal stability of leather by hydrophilicity regulation: effect of hydrophilicity of phenolic syntan 通过亲水性调节提高皮革热稳定性的探索:酚类化合物亲水性的影响

Journal of Leather Science and Engineering Pub Date : 2022-08-15 DOI: 10.1186/s42825-022-00096-1

Qingyong Sun, Yunhang Zeng, Yue Yu, Ya-nan Wang, Bi Shi

{"title":"An exploration of enhancing thermal stability of leather by hydrophilicity regulation: effect of hydrophilicity of phenolic syntan","authors":"Qingyong Sun, Yunhang Zeng, Yue Yu, Ya-nan Wang, Bi Shi","doi":"10.1186/s42825-022-00096-1","DOIUrl":"10.1186/s42825-022-00096-1","url":null,"abstract":"<div><p>Effect of retanning on the thermal stability of leather is eliciting increasing attention. However, the relationship between the hydrophilicity of retanning agents and the heat resistance of leather and the corresponding mechanism remain unclear. Herein, phenolic formaldehyde syntans (PFSs) were selected as models to explore the effect of the hydrophilicity of retanning agents on the thermal stability of retanned leather. The thermal stability of leather was closely correlated to the hydrophilic group content (sulfonation degree) of PFSs. As the sulfonation degree increased, the water absorption rate of PFSs and their retanned leathers decreased, whereas the thermal stability of leather increased. Molecular dynamics simulation results proved that the introduction of PFSs could reduce the binding ability of collagen molecules with water and thus decreased the water molecules around the PFS-treated collagen. These results may provide guidance for the tanners to select retanning agents reasonably to improve the thermal stability of leather.</p><h3>Graphical Abstract</h3>\u0000 <div><figure><div><div><picture><source><img></source></picture></div></div></figure></div>\u0000 </div>","PeriodicalId":640,"journal":{"name":"Journal of Leather Science and Engineering","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://JLSE.SpringerOpen.com/counter/pdf/10.1186/s42825-022-00096-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75197949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Technical and technological constraints facing Tanzania leather value chain: a snapshot of intervention measures 坦桑尼亚皮革价值链面临的技术和技术限制:干预措施的快照

Journal of Leather Science and Engineering Pub Date : 2022-08-10 DOI: 10.1186/s42825-022-00095-2

Cecilia Rolence China, Rahel Elibariki, Jamal Msami, Stephen Mwombela, Lugano Wilson

{"title":"Technical and technological constraints facing Tanzania leather value chain: a snapshot of intervention measures","authors":"Cecilia Rolence China, Rahel Elibariki, Jamal Msami, Stephen Mwombela, Lugano Wilson","doi":"10.1186/s42825-022-00095-2","DOIUrl":"10.1186/s42825-022-00095-2","url":null,"abstract":"<div><p>The leather value chain starts with livestock, the key source of hides and skins, and the main raw materials for the industry. Despite having the second-largest livestock population in Africa, Tanzania is only the 11th largest exporter of leather on the continent, underlining the disproportionate contribution of the sector to the economy. This study presents the results of a recent assessment aimed at identifying performance bottlenecks in Tanzania's leather sector. The assessment took place in October–December 2020 and involved 10 tanneries, 30 leather goods factories and 11 service providers/institutions. Findings reveal that 90% of tanneries are dissatisfied with the quality of hides and skins due to brand marks, flay cuts, skin diseases, and inadequate curing. These supply chain bottlenecks are further compounded by skill deficiencies among processors, poor waste management, and limited awareness about laws, policies and regulations governing trade in the sector. At the downstream end of the value chain, the trade in leather and related articles is facing competition from high importation of low-grade products like plastic shoes and second-hand products. This paper recommends that efforts to increase leather's economic and trade value need to focus on upgrading Tanzania’s production, processing, branding and marketing capacities.</p><h3>Graphical Abstract</h3>\u0000 <div><figure><div><div><picture><source><img></source></picture></div></div></figure></div>\u0000 </div>","PeriodicalId":640,"journal":{"name":"Journal of Leather Science and Engineering","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://JLSE.SpringerOpen.com/counter/pdf/10.1186/s42825-022-00095-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90320575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Laccase-functionalized magnetic framework composite enabled chlorophenols degradation, a potential remediation for fungicides residues in leather 漆酶功能化的磁框架复合材料使氯酚降解成为一种潜在的皮革杀菌剂残留修复方法

Journal of Leather Science and Engineering Pub Date : 2022-07-25 DOI: 10.1186/s42825-022-00094-3

Min Cao, Jie Yu, Xing Zhang, Yamei Lin, He Huang

{"title":"Laccase-functionalized magnetic framework composite enabled chlorophenols degradation, a potential remediation for fungicides residues in leather","authors":"Min Cao, Jie Yu, Xing Zhang, Yamei Lin, He Huang","doi":"10.1186/s42825-022-00094-3","DOIUrl":"10.1186/s42825-022-00094-3","url":null,"abstract":"<p>Chlorophenols, used as the fungicides in leather, are strictly limited in leather products. In this work, a metal–organic framework material, zeolitic metal azolate framework-7 (MAF-7), was first used to encapsulate laccase (Lac) to prepare MAF-7/Lac bio-composites with 98.5% immobilization yield. Afterward, Lac/MNP@MOM was formed by introducing the magnetic nanoparticles (MNPs) into the Lac@MOM. MAF-7 with better hydrophilicity and stronger pH buffering ability, exhibits good compatibility with laccase, which can reserve the activity of laccase after immobilization. Moreover, the porous structure of MAF-7 is favorable for the sufficient contact between laccase and substrates. Lac/MNP@MOM exhibited excellent activity when exposed to high temperature, extreme pH, and organic solvents, which also simplified complex recovery steps. Furthermore, the degradation rate of 2,4-dichlorophenol (2,4-DCP) could reach as high as 97% within 24 h by immobilized laccase, and after nine consecutive cycles of operation, enzyme activity could remain over 80%, which gives it the potential for practical applications.</p>","PeriodicalId":640,"journal":{"name":"Journal of Leather Science and Engineering","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://JLSE.SpringerOpen.com/counter/pdf/10.1186/s42825-022-00094-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77887847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4