Leather and Footwear Journal最新文献_第3页

The Influence of Protein and Elastomer Waste Mixture on the NBR-Based Elastomer Compound 蛋白质与弹性体废弃物混合对nbr基弹性体复合材料的影响

Leather and Footwear Journal Pub Date : 2022-12-15 DOI: 10.24264/lfj.22.4.2

M. Nițuică, M. Sönmez, M. Stelescu, L. Alexandrescu, M. Georgescu, D. Gurau, E. Badea, Bogdan Florin Rusu, Andrei Dumitru

{"title":"The Influence of Protein and Elastomer Waste Mixture on the NBR-Based Elastomer Compound","authors":"M. Nițuică, M. Sönmez, M. Stelescu, L. Alexandrescu, M. Georgescu, D. Gurau, E. Badea, Bogdan Florin Rusu, Andrei Dumitru","doi":"10.24264/lfj.22.4.2","DOIUrl":"https://doi.org/10.24264/lfj.22.4.2","url":null,"abstract":"The paper presents the influence of a mixture of elastomeric and protein waste from the footwear industry on the properties of elastomeric compounds based on NBR (butadiene-co-acrylonitrile) rubber, as well as their obtaining and characterization. The mixture of leather and rubber waste was cryogenically ground, in three grinding cycles, and the selected size was 0.35 mm, and the rotation speed of 14,000 rpm. After grinding, the leather and rubber waste mixture was functionalized with potassium oleate at a temperature of 60°C. The polymer compounds based on butadiene-co-acrylonitrile rubber (NBR) and the mixture of protein and elastomeric waste (in the ratio of 15, 20, 40, 50%) from the footwear industry were processed by mixing on an internal Brabender mixer, tested from a rheological, physical and mechanical point of view (hardness, elasticity and tensile strength) after conditioning for 24 h at room temperature according to the standards in force, but also by FT-IR spectroscopy performed with a double beam IR molecular absorption spectrometer, in the range 4000-400 cm-1, using the FT-IR Thermo Nicolet iS 50, equipped with ATR with diamond crystal. Following characterisation, it can be said that they present optimal values that fall within the standards for the footwear industry.","PeriodicalId":38857,"journal":{"name":"Leather and Footwear Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44118034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Ablation Method of Grinding a Leather Split under the Influence of Laser Radiation 激光辐照下皮革裂口磨削的烧蚀方法

Leather and Footwear Journal Pub Date : 2022-12-15 DOI: 10.24264/lfj.22.4.1

G. Jumayeva, M. Markevich, A. Toshev, T. Kodirov, Sh U Shoyimov

引用次数: 0

Preparation of Elastin Membranes Based on Surfactants and Separation Mechanism 表面活性剂弹性蛋白膜的制备及其分离机理

Leather and Footwear Journal Pub Date : 2022-09-30 DOI: 10.24264/lfj.22.3.7

D. Simion, C. Gaidău, G. Păun

引用次数: 0

The Validity and Reliability of TrueDepth Camera Embedded in the Phone for Foot Measurement 手机嵌入式足部测量TrueDepth相机的有效性和可靠性

Leather and Footwear Journal Pub Date : 2022-09-30 DOI: 10.24264/lfj.22.3.3

Qian Lu, Shunxun Li, Jin Zhou, Zhifeng Yao, Wei Li

{"title":"The Validity and Reliability of TrueDepth Camera Embedded in the Phone for Foot Measurement","authors":"Qian Lu, Shunxun Li, Jin Zhou, Zhifeng Yao, Wei Li","doi":"10.24264/lfj.22.3.3","DOIUrl":"https://doi.org/10.24264/lfj.22.3.3","url":null,"abstract":"There are several laser or structured-light based foot scanners available on the market, which can be used to obtain accurate 3D foot models. Compared to those 3D scanning devices, TrueDepth cameras are portable, inexpensive and easy-to-use. However, the accuracy and reliability of their 3D foot scanning remain to be confirmed. This study aimed to verify the validity and reliability of structured light TrueDepth camera integrated into the mobile phone when it is used for foot measurement. Thirteen students without any kinds of foot abnormalities or foot diseases were recruited and their feet were measured by both Infoot 3D foot scanner and mobile phone with TrueDepth camera. Three parameters were measured including foot length, foot breadth and ball girth. Subsequently, the reliability and validity of the two methods were assessed by linear regression analyses, intraclass Correlation Coefficient and Bland-Altman analysis. The foot breadth and girth circumference measurements all showed high coefficients of determination (R2>0.8) between the two methods and three measurements indicated good to excellent agreements (ICCs>0.9), although the length measurement was reported without significant coefficients of determination. Further, findings from Bland-Altman analysis demonstrated that the measurements from the TrueDepth camera had good agreements with those from Infoot and they could be used interchangeably. However, with the reconstruction algorithm updating in the near future, we could foresee the promotion in foot length measurement when using the TrueDepth camera from the phone. The TrueDepth camera utilizing structured-light and the customized application for foot measurement has fast, accurate and low-cost features and it is a convenient and economical method to obtain the foot 3D model. It can be widely applied for medical purposes and customization.","PeriodicalId":38857,"journal":{"name":"Leather and Footwear Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44335799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Obtaining Bioemulsions Structured as "Networks" by Innovative Technologies 通过创新技术获得“网络”结构的生物乳液

Leather and Footwear Journal Pub Date : 2022-09-30 DOI: 10.24264/lfj.22.3.2

D. Simion, C. Gaidău, G. Păun, M. Stanca, D. Berechet

{"title":"Obtaining Bioemulsions Structured as \"Networks\" by Innovative Technologies","authors":"D. Simion, C. Gaidău, G. Păun, M. Stanca, D. Berechet","doi":"10.24264/lfj.22.3.2","DOIUrl":"https://doi.org/10.24264/lfj.22.3.2","url":null,"abstract":"New bioemulsions structured like “networks” were created by innovative technologies based on: elastin/zinc hydroxide/ (bolaamphiphiles mixture: bis [2-butyl (sodium bis-thioacetate) sodium dicarboxylate 1,10 decanediyl ester] and/or sucrose diester)/ acetic acid/water, for improved surface properties development with applications in leather industry. We used in this research two “bolaamphiphiles”. Bolaamphiphilic molecules contain a hydrophobic skeleton (e.g., one, two, or three alkyl chains, a steroid, or a porphyrin) and two water-soluble groups on both ends. The interaction of surfactants with biopolymers in aqueous medium results in the formation of different association structures. There are various morphologies of biopolymer-surfactant association complexes depending on the molecular structure of the biopolymer and surfactant, on the nature of interaction forces between solvents and surfactant or biopolymer. The innovation consists in the technologies for obtaining novel micro and nanostructured bioemulsions, and the compatibilisation with film forming polymers for leather surface finishing. Elastin/zinc hydroxide micro and nanocomposites have been stabilized with bolaamphiphilic surfactants mixture: bis [2-butyl (sodium bis-thioacetate) sodium dicarboxylate 1,10 decanediyl ester and sucrose diester in a 1:1 acetic acid/water ratio, to increase the uniformity of nanocomposites. Micro and nanostructured composites like “networks” developed as a result of biopolymer-surfactants interactions for elastin/zinc hydroxide/surfactants mixture couple in acetic acid/water system are reported by SEM microscopy and DLS analysis. A special class of micro and nanoarchitectures is represented by structures organized as “network” assemblies. The novel micro and nanocomposites can provide the hybrid film with increased resistance to rubbing and water, and to deformation. Environmentally-friendly substrates with smart multifunctional features can be obtained for various applications.","PeriodicalId":38857,"journal":{"name":"Leather and Footwear Journal","volume":" October","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41251617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enzymatic Biotechnology Applied to Pelt Waste 酶法生物技术在毛皮废弃物中的应用

Leather and Footwear Journal Pub Date : 2022-09-30 DOI: 10.24264/lfj.22.3.4

R. Constantinescu, M. Ferdeș, Mădălina Ignat, C. Chelaru, Ana-Maria Ciobanu, Denis-Andrei Drușan

引用次数: 0

Biodegradable Polymeric Composites Based on Natural Rubber and Functionalized Post-Consumer Leather Waste 基于天然橡胶和功能化消费后皮革废料的可生物降解聚合物复合材料

Leather and Footwear Journal Pub Date : 2022-09-30 DOI: 10.24264/lfj.22.3.8

L. Alexandrescu, M. Georgescu, M. Sönmez, M. Nițuică, M. Stelescu, D. Gurau

{"title":"Biodegradable Polymeric Composites Based on Natural Rubber and Functionalized Post-Consumer Leather Waste","authors":"L. Alexandrescu, M. Georgescu, M. Sönmez, M. Nițuică, M. Stelescu, D. Gurau","doi":"10.24264/lfj.22.3.8","DOIUrl":"https://doi.org/10.24264/lfj.22.3.8","url":null,"abstract":"This work presents the development and characterization of biodegradable polymeric composites based on natural rubber and protein waste from finished post-consumer leather. Protein waste is cryogenically ground to min. 500 nm, functionalized by a mechanical process at temperature with potassium oleate (5%) and mixed in the composite in various proportions (5, 10, 20, 30, 50%). This composite will be made into a low-density product, with low cost, recovery and reuse of waste, and last but not least, biodegradable. The methodology for making the new materials involves the following steps: sorting waste, grinding, functionalization and compounding. These operations are easy to manage and do not involve new equipment. Compounding, the most important operation, will be carried out on a roller and the mixtures will be processed into finished products by compression in an electric press. The tested biodegradable composites were structurally and physico-mechanically characterized. Waste transformation (ground and functionalized) into new value-added products will lead to remarkable improvements in the life cycle of raw materials and the sustainable use of this waste, contributing to sustainability, improving eco-efficiency and economic efficiency and reducing the “pressure” of waste on the environment.","PeriodicalId":38857,"journal":{"name":"Leather and Footwear Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48109670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Testing of Medical Sheep Fur with Antimicrobial Properties – Part 1 医用羊皮抗菌性能的检验。第1部分

Leather and Footwear Journal Pub Date : 2022-09-30 DOI: 10.24264/lfj.22.3.6

O. Niculescu, R. Constantinescu, D. Gurau

引用次数: 0

Polymer Composite Based on Natural Rubber and Functionalized Rubber Waste 基于天然橡胶和功能化废橡胶的聚合物复合材料

Leather and Footwear Journal Pub Date : 2022-09-30 DOI: 10.24264/lfj.22.3.5

L. Alexandrescu, M. Georgescu, M. Sönmez, M. Nițuică, M. Stelescu, D. Gurau

{"title":"Polymer Composite Based on Natural Rubber and Functionalized Rubber Waste","authors":"L. Alexandrescu, M. Georgescu, M. Sönmez, M. Nițuică, M. Stelescu, D. Gurau","doi":"10.24264/lfj.22.3.5","DOIUrl":"https://doi.org/10.24264/lfj.22.3.5","url":null,"abstract":"In this work, biodegradable polymer composites were made based on natural rubber and post-consumer vulcanized rubber waste functionalized with potassium oleate, in various proportions (5, 10, 20, 30, 50%), cryogenically ground to dimensions of min. 500 nm and polyethylene grafted with maleic anhydride as compatibilizer between the two phases. This composite will be made into a low-density product, with low cost, and last but not least, biodegradable, with the recovery and reuse of waste, containing post-consumer polymers. The methodology for making the new materials involves the following steps: sorting waste, grinding, functionalization and compounding. These operations are easy to manage and do not involve new equipment. Compounding, the most important operation, is carried out on a roller and the mixtures are processed into finished products by compression in an electric press. The tested biodegradable composites were structurally and physico-mechanically characterized. Waste transformation (ground and functionalized) into new value-added products will lead to remarkable improvements in the life cycle of raw materials and the sustainable use of this waste, contributing to sustainability, improving eco-efficiency and economic efficiency and reducing the “pressure” of waste on the environment.","PeriodicalId":38857,"journal":{"name":"Leather and Footwear Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46154544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Estimation of the Regimes of Ablation of the Fabric of Karakul for Glutaraldehyde Tanning Under the Exposure of a Laser on Yttrium Aluminum Garnet 激光照射钇铝石榴石对戊二醛鞣用卡拉库尔织物烧蚀的影响

Leather and Footwear Journal Pub Date : 2022-09-30 DOI: 10.24264/lfj.22.3.1

J. Azimov, M. I. Markevich, Tulkin Jumaevich Kodirov, Shokhrukh Shukhratovich Shoyimov, A. Toshev

{"title":"Estimation of the Regimes of Ablation of the Fabric of Karakul for Glutaraldehyde Tanning Under the Exposure of a Laser on Yttrium Aluminum Garnet","authors":"J. Azimov, M. I. Markevich, Tulkin Jumaevich Kodirov, Shokhrukh Shukhratovich Shoyimov, A. Toshev","doi":"10.24264/lfj.22.3.1","DOIUrl":"https://doi.org/10.24264/lfj.22.3.1","url":null,"abstract":"The article discusses the activation of the surface of karakul (astrakhan) leather tissue by laser exposure, changes in the surface morphology of karakul leather tissue during laser processing and subsequent glutaraldehyde tanning combined with chrome tanning of karakul leather. The morphology of the surface of the sample was investigated by the methods of optical and scanning electron microscopy and the elemental analysis of the skin tissue of karakul under the action of laser radiation from the front side was carried out. Dry tanning was carried out after laser exposure. For the first time, the morphology of the surface of the skin tissue of karakul was investigated using a laser generating in a two-pulse mode (pulses are separated by a time interval of 3 μs, pulse duration of 10 ns) with a wavelength of 1064 nm in a wide range of deposited energies, which lead, as to the mode of ablation of the surface of the skin tissue of karakul and to its perforation followed by glutaraldehyde tanning. The possibility of changing the consumer parameters of the skin tissue of karakul due to the dermis dissociation, conformational changes, which lead to a change in the structure, is shown. At energies more than 30 J, the skin is perforated with carbonization of the edges of the holes.","PeriodicalId":38857,"journal":{"name":"Leather and Footwear Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42810498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0