Feature articles collections
A review on marine collagen: sources, extraction methods, colloids properties, and food applications
Shahzad Farooq, Muhammad Ijaz Ahmad, Shijie Zheng, Usman Ali, Yang Li, Cui Shixiu & Hui Zhang*
Journal of Leather Science and Engineering 2024 3: 18
Interest in value-added industrial by-products surged in the past decade, driving research into various collagen sources and extraction methods. While bovine hide, cattle bones, pork, and pig skins remain the most abundant collagen sources, there is a growing trend in the industrial utilization of collagen from non-mammalian species. This review explores marine collagen, as well as its extraction techniques and applications in food industry. Collagens extracted from fish, jellyfish, and sea cucumbers have considerable yield and mostly comprised type-I collagen. Ultrasound-assisted extraction methods show promise in enhancing yields and strengthen the triple-stranded helical structure. Marine collagen is used as biodegradable film-forming materials, colloid stabilizers, foaming and micro-encapsulating agents, enhancing the stability, consistency and elasticity in the food products.
Ultra-low reflection electromagnetic interference shielding nanofiber film with effective solar harvesting and self-cleaning
Bin Lyu*, Yunchuan Wang, Dangge Gao*, Shihao Guo, Yingying Zhou & Jianzhong Ma*
Journal of Leather Science and Engineering 2024 1: 5
Developing low-reflection electromagnetic interference shielding materials can effectively decrease the secondary radiation pollution of electromagnetic waves. Herein, by using waste leather scraps and ZIF-8 as raw materials, a low-reflection electromagnetic interference shielding nanofiber film with ZnO coated on carbon fiber (CNF), was fabricated by electrospinning and carbonization methods. ZnO endows the nanofiber film low reflection property through optimizing impedance matching between free space and the nanofiber film. The nanofiber film possesses high electromagnetic interference shielding efficiency, which is beneficial to the excellent electrical conductivity of CNF. What’s more, the nanofiber film involves abundant interface, ultra-low reflectivity, excellent solar harvesting and self-cleaning performances.
Recent progresses of collagen dressings for chronic skin wound healing
Jinhui Wei, Min Yuan, Songtao Wang, Xuehu Wang, Nan An, Guangping Lv*, Lina Wu*
Journal of Leather Science and Engineering 2023 12:11
Inappropriate treatments of skin wounds would lead to chronic wounds, which poses a substantial challenge in dermatology. Collagen-based dressings have been increasingly developed to heal the chronic wounds. This review overviews different types of collagen-based wound healing dressings and critically discusses their advantages and limitations. In addition, the role of collagen dressing in wound healing and the commercialized collagen dressings have been summarized. Finally, an outlook of collagen dressings has been finally speculated, which will greatly contribute to their future development.
Recent advances in metal organic frameworks for the catalytic degradation of organic pollutants
Shuangni Shi, Lili Wang, Chen Song, Linyan Yao*, Jianxi Xiao*
Journal of Leather Science and Engineering 2023 10:23
The application of metal organic frameworks (MOFs) with their large surface area and numerous active sites for the catalytic degradation of organic pollutants has provided effective solutions to address diverse environmental problems. This review summarizes the different reaction types of MOFs in the removal of organic pollutants, such as physical adsorbents, enzyme immobilization carriers, nanoenzymes, photocatalytic catalysts, photo Fenton and sulfate radical based advanced oxidation processes (SR-AOPs). Finally, the opportunities and challenges of developing advanced MOFs for the removal of organic pollutants were discussed and anticipated.
Developments for collagen hydrolysates as a multifunctional antioxidant in biomedical domains
Guiya Deng, Ke Huang, Xianchao Jiang, Kun Wang, Zihao Song, Yuchen Su, Chengming Li, Shuai Zhang, Shiqi Wang*, Yaqin Huang*
Journal of Leather Science and Engineering 2023 9:26
Oxidative stress is caused by excessive production and accumulation of reactive oxygen species in cells, which has harmful effects on human health. Due to its special structural, biological and physicochemical properties, collagen hydrolysates have been explored as a multifunctional antioxidant in the biomedical field. This review discusses the preparation technology of antioxidant collagen hydrolysates and the effects of amino acid composition and peptide structure on the antioxidant activity of collagen hydrolysates. Additionally, the applications of antioxidant collagen hydrolysates in the biomedical field are summarized, with critical discussions on the advantages, current limitations and challenges to be resolved in the future.
Effects of bactericide–protease interactions on the protease-assisted soaking performance
Hao Liu, Yahang Pan, Bi Shi, Yunhang Zeng*
Journal of Leather Science and Engineering 2023 9:27
Protease-assisted soaking has received increasing attention in recent years because proteases can be used to reduce the soaking time by accelerating the removal of unstructured proteins and attacking the epidermis of raw hides. However, few reports have elaborated on the effects of bactericides, which are used to protect raw hides from microbial damage in the soaking process, on the performance of protease-assisted soaking. This study investigated the interactions between bactericides and protease and provided an ideal way to use bactericides and protease in the soaking. The findings contribute to a better design of protease-assisted soaking process.
Structure, extraction, processing, and applications of collagen as an ideal component for biomaterials - A review
Qijue Chen, Ying Pei*, Keyong Tang* & Mǎdǎlina Georgiana Albu-Kaya
Journal of Leather Science and Engineering 2023 7:4
The preparation of composite biomaterials is essential in meeting the growing demand for biomedical applications. Collagen, with its multi-hierarchical structure and exceptional biological properties, possesses great potential in this regard. This review presented an overview of current extraction methods for collagen-based biomaterials derived from various biological tissues and examined the available processing approaches for such biomaterials. Additionally, recent advances in the use of collagen-based biomaterials for drug and gene delivery, tissue repair, and smart healthcare devices were discussed. In summary, this review offers valuable insights for the development of collagen-based materials in the field of biomedicine.
Advancing collagen-based biomaterials for oral and craniofacial tissue regeneration
Bo Zhang, Yunxiang He, Jialing Liu, Jiaojiao Shang, Chider Chen, Tianyi Wang, Mei Chen, Yifei Li, Guidong Gong*, Jie Fang*, Zhihe Zhao & Junling Guo
Journal of Leather Science and Engineering 2023 5:6
Assisted reproductive technology is the key to solving the problems of population aging and low birth rate. Due to the high biocompatibility and versatile chemical properties, collagen shows promising potential in reproductive medicine and reproductive tissue engineering. This review summarized and discussed the current progress of collagen-based materials for reproductive medicine. In addition, the current applications of collagen-based biomaterials in engineered reproductive tissue were combed through. Furthermore, the relationship between the exploration of collagen-based materials used in reproductive medicine and the leather manufacturing was discussed. This review provides a valuable discussion for developing collagen-based reproductive medicine-related materials.
High-strength collagen/delphinidin film incorporated with Vaccinium oxycoccus pigment for active and intelligent food packaging
Simiao Yin, Yuanzhi Zhang, Xiaoxia Zhang, Keyu Tao, Guoying Li*
Journal of Leather Science and Engineering 2023 4:13
The active/intelligent collagen film was developed using the antioxidant activity of delphinidin, synergistic catalysis of laccase/delphinidin, and pH sensitivity of Vaccinium oxycoccus pigment for preservation and freshness monitoring of fish. The active/intelligent film exhibited an enhanced wet mechanical strength compared to pure collagen film. The fish packed in the active/intelligent film extended the shelf life for 2 days and the color of the film would change after the fish spoiled. This study provides a theoretical reference for the functional design and application of collagen film in food field.
Recent advances concerning polyurethane in leather applications: an overview of conventional and greener solutions
Jize Liu, Federica Recupido, Giuseppe Cesare Lama, Maria Oliviero, Letizia Verdolotti*, Marino Lavorgna
Journal of Leather Science and Engineering 2023 3:9
Leather is one of the most popular products across globe economy, and the traditional leather industry is making efforts for “green chemistry” principles. Polyurethanes, which exhibit tunable chemical structures by selecting suitable precursors, can fit specific requirements such as comfort, flexibility, water resistance as well as adhesive strength. The developments of green strategies make them candidates for leather industry, where polyurethane-based leathers can be obtained by either selecting renewable polyol precursors or non-isocyanate components (NPIUs). This mini review outlines the recent advances of more sustainable polyurethanes in leather industry, including their design and properties, and in synthetic leather and surface-finishing (coatings/binders).
Wrapping collagen-based nanoparticle with macrophage membrane for treating multidrug-resistant bacterial infection
Yuanyuan Li, Jianming Xiong, Yi Hu, Wenjun Miao, He Huang
Photodynamic therapy has shown tremendous strengths in fighting against multidrug-resistant bacterial infections. For enhancing the bacteria targeting ability of nanoagent, we herein constructed macrophage membrane(MM)-wrapped photosensitizer-loaded collagen nanoparticles (Ce6/Col/MM) for photodynamic treatment of methicillin-resistant Staphylococcus aureus (MRSA)-infected wound. Thanks to the inherited pattern-recognition receptors on MM, as-fabricated Ce6/Col/MM exhibit superior targeting ability towards bacteria and subsequent effective photodynamic antibacterial potency. With the collagen nature, the treatment of MRSA-infected wound in mice with Ce6/Col/MM plus light illumination resulted in potent bacterial inactivation and accelerated wound healing, providing a powerful photodynamic bactericidal nanoflatform.
A review on room-temperature self-healing polyurethane: synthesis, self-healing mechanism and application
Yupeng Li, Yong Jin*, Wuhou Fan and Rong Zhou
Journal of Leather Science and Engineering 2022 4:24
Polyurethanes have been widely used in many fields due to their excellent comprehensive properties. In recent years, room-temperature self-healing polyurethanes have received special attentions because under mild conditions they can repair mechanical damages, thereby extending their lifetimes and reducing maintenance costs. This paper reviewed the synthesis methods and self-healing mechanisms of room-temperature self-healing polyurethanes and described their mechanical and self-healing properties. In addition, the latest applications of room-temperature self-healing polyurethanes in the fields of leather coatings, photoluminescence materials, flexible electronics and biomaterials were summarized. This review provides a valuable reference for the prosperous development of room-temperature self-healing polyurethanes.
Self-driven directional dehydration enabled eco-friendly manufacture of chrome-free leather
Yawen Huang, Hanzhong Xiao, Haoliang Pu, Ni Xue, Baicun Hao, Xin Huang* and Bi Shi*
Journal of Leather Science and Engineering 2022 4:17
Leather industry is pursuing environmentally benign chrome-free leather manufacture technology for accomplishing its sustainable development. Distinctive from the conventional chrome-free leather manufactures that followed classic cross-linking mechanism, the authors here developed a brand-new chrome-free leather making strategy that utilized composite dehydration media comprised of anhydrous ethanol and 3A molecular sieve to enable self-driven directional dehydration of raw hide for accomplishing chrome-free leather manufacture without the formation of cross-linkages among collagen fibers. The as-prepared chrome-free leather exhibited outstanding mechanical properties and dry-thermal stability. Notably, the composite dehydration media was easily recyclable, thus providing an eco-friendly leather manufacture process.
Collagen-based materials in reproductive medicine and engineered reproductive tissues
Hanxiao Chen, Luqi Xue, Guidong Gong, Jiezhou Pan, Xiaoling Wang, Yaoyao Zhang*, Junling Guo* and Lang Qin*
Journal of Leather Science and Engineering 2022 4:3
Assisted reproductive technology is the key to solving the problems of population aging and low birth rate. Due to the high biocompatibility and versatile chemical properties, collagen shows promising potential in reproductive medicine and reproductive tissue engineering. This review summarized and discussed the current progress of collagen-based materials for reproductive medicine. In addition, the current applications of collagen-based biomaterials in engineered reproductive tissue were combed through. Furthermore, the relationship between the exploration of collagen-based materials used in reproductive medicine and the leather manufacturing was discussed. This review provides a valuable discussion for developing collagen-based reproductive medicine-related materials.
Application of amphoteric polymers in the process of leather post-tanning
Xuechuan Wang*, Siwei Sun, Xing Zhu*, Peiying Guo, Xinhua Liu, Chunlin Liu, Meng Lei
Journal of Leather Science and Engineering 2021 3:9
With the characteristics of controllable charge and environmental friendliness, amphoteric polymers can be used in post-tanning process to solve the problems that arise during leather making and are caused by the low absorption rate of single-charge chemicals, incompatibility with new tanning methods, and complex operation process. In this review, the structure, performance, and preparation of amphoteric polymers are reported. Then, the charge change of collagen during different tanning and pH treatments is introduced. Finally, the application and development of amphoteric polymers during the post-tanning process of leather making are discussed. This review has certain guiding significance to the preparation and application of amphoteric polymers for tanning system.
Collagen fiber membrane-derived chemically and mechanically durable superhydrophobic membrane for high-performance emulsion separation
Huifang Li, Wan Zheng, Hanzhong Xiao, Baicun Hao, Yujia Wang, Xin Huang* and Bi Shi*
Journal of Leather Science and Engineering 2021 3:20
Membrane separation is of significance to address the concerned issue of pollution caused by emulsion wastewater. Herein, we developed chemically and mechanically durable superhydrophobic membrane by embedding UiO-66 within the 3D hierarchically fibrous structure of collagen fiber membrane (CFM), followed by coating with polydimethylsiloxane. For the as-prepared superhydrophobic separation membrane, the UiO-66 with micropore size was capable of demulsifying micro- and nanoemulsions with high separation efficiency, while the capillary effect of 3D fibrous CFM guaranteed high separation flux. In addition to the high separation performances, the as-prepared separation membrane also featured solvent resistance, acid-alkali tolerance, UV-aging resistance and mechanical durability.
Biomedical application of photo-crosslinked gelatin hydrogels
Lei Xiang and Wenguo Cui*
Journal of Leather Science and Engineering 2021 3:3
During the past decades, photo-crosslinked gelatin hydrogel (methacrylated gelatin, GelMA) has gained a lot of attention due to its remarkable application in the biomedical field. It has been widely used in cell transplantation, cell culture and drug delivery, based on its crosslinking to form hydrogels with tunable mechanical properties and excellent bio-compatibility when exposed to light irradiation to mimic the micro-environment of native extracellular matrix (ECM). Because of its unique biofunctionality and mechanical tenability, it has also been widely applied in the repair and regeneration of bone, heart, cornea, epidermal tissue, cartilage, vascular, peripheral nerve, oral mucosa, and skeletal muscle et al. The purpose of this review is to summarize the recent application of GelMA in drug delivery and tissue engineering field. Moreover, this review article will briefly introduce both the development of GelMA and the characterization of GelMA. Finally, we discuss the challenges and future development prospects of GelMA as a tissue engineering material and drug or gene delivery carrier, hoping to contribute to accelerating the development of GelMA in the biomedical field.
Alternative uses for tannery wastes: a review of environmental, sustainability, and science
Cesar Vinicius Toniciolli Rigueto*, Marieli Rosseto, Daniela Dal Castel Krein, Bruna Elisangela Pessini Ostwald, Lillian Avila Massuda, Bárbara Belém Zanella and Aline Dettmer*
Journal of Leather Science and Engineering 2020 2:21
The manufacture of leather covers a wide productive chain and beyond contributes to the economic flow. The various stages of leather processing result in high volumes of solid waste. In Brazil, a daily generation of 375 tons of solid waste is estimated, and landfills are still the most used route to its destination. In this review, emphasis will be given to researches that have sought alternatives for the use of solid waste from the tannery industry. Among the main applications of solid tannery wastes, the following stand out production of adsorbent materials, biodiesel, biogas, biopolymers, applications in agriculture and other applications involving extraction/recovery of compounds of industrial/commercial interest, isolation of microorganisms and production of enzymes and applications in the animal diet. In each alternative of waste application, the technologies used, the opportunities, and the challenges faced are mentioned. We hope that this review can provide valuable information to promote the broad understanding of the possibilities that tannery solid wastes has for the development of biodegradable and agricultural products, wastewater treatment, extraction of compounds of industrial and commercial interest, among others.
Utilization of waste wool fibers for fabrication of wool powders and keratin: a review
Chunhua Zhang, Liangjun Xia, Jiajing Zhang, Xin Liu and Weilin Xu*
Wool fiber contains abundant sources of structural protein, which exhibits outstanding performance including high moisture regain, excellent resiliency, good elasticity and biocompatibility. However, a large amount of wool fiber, such as poor-quality raw wool that is not fit for spinning, and other secondary waste that is generally obtained in the textile industry are underutilized. Developing appropriate approaches to recycle wool waste and produce value-added products is vital for sustainable development and reducing the environmental burden. The authors review the mechanical methods of fabricating wool powder, including pan milling, combined wet and air-jet milling, steam explosion, freeze milling, and three-stage milling. The influencing factors of shape and size, structure, and properties are highlighted for the overview of possible controlling methods. Then, this review summarizes various chemical methods for the extraction of wool keratin, underlining the dissolution efficiency and the structure of wool keratin. Furthermore, the applications of reused wool particles in textile, biosorbent, and biomaterials are also reported. Finally, several perspectives in terms of future research on the fabrication and application of wool particles are highlighted.
Denatured proteins as a novel template for the synthesis of well-defined, ultra-stable and water-soluble metal nanostructures for catalytic applications.
Chaojian Chen*, David Yuen Wah Ng and Tanja Weil*
The environmentally friendly synthesis and stabilization of noble metal nanoparticles using biopolymers have generated great interest in recent years. The authors report on denatured proteins as a novel template for the preparation of water-soluble metal nanoparticles, including spherical gold and platinum nanoparticles as well as gold nanoflowers, with excellent stability. While different reducing agents were found to determine the shape of nanoparticles, they also demonstrated the control of particle size by varying the concentration of the template. These metal nanoparticles were successfully employed as highly efficient catalysts for the hydrogenation reaction of p-nitrophenol to p-aminophenol. The novel template developed in this work provides easy access to various metal nanoparticles with tunable size and shape, which may find broad applications in catalysis, energy, sensing, biomedicine, and leather industry.
RAMAN AND ATR-FTIR SPECTROSCOPY TOWARDS CLASSIFICATION OF WET BLUE BOVINE LEATHER USING RATIOMETRIC AND CHEMOMETRIC ANALYSIS
Megha Mehta*, Rafea Naffa, Catherine Maidment, Geoff Holmes and Mark Waterland
‘Looseness’ is a major concern to the leather industry. The author has investigated wet blue leather which is chrome-tanned leather obtained from two regions of bovine – distal axilla (DA), i.e., from the flank side and official sampling position (OSP), i.e., from near the central lower region. The aim is to obtain a better understanding of how tight and loose wet blue leather might be differentiated through measurement, since the OSP and DA regions typically give tighter or looser leathers, respectively. They have developed a model using a non-destructive technique - Raman and ATR-FTIR spectroscopy that can identify the looseness fault at an early stage of the leather production that not only will save time but also minimize the costs incurred by looseness. By studying the spectral changes in the secondary structures of Amide I region of the collagen, both DA and OSP wet blue samples were differentiated quantitatively with high accuracy using ratiometric analysis supported with logistic regression. Further, from multivariate analysis, they have shown that there is a perfect classification between the two leather groups based on protein and lipid content. The results from their studies will serve as an excellent model for rapid diagnosis of leather quality using non-destructive vibrational spectroscopy techniques for the global leather industry.
Investigation of the solubility and dispersion degree of calf skin collagen in ionic liquids
Sicong Liu, Qian Li and Guoying Li
The application of ionic liquids in collagen has been widely investigated, though, hardly has any focused on the solubility, nor the dispersion degree of collagen. Herein, this study used two sorts of ionic liquids in different concentrations to investigate their effect on collagen. Results showed that the undenatured collagen was partially dissolved in ionic liquids, while the insoluble part was loosened in fibrous level and the soluble part was dispersed in molecular level.
Factors affecting mass transfer of protease in pelt during enzymatic bating process
Ying Song, Siqi Wu, Qian Yang, Hao Liu, Yunhang Zeng & Bi Shi
Bating process is important in leather manufacture, but it is easy to damage hide collagen because protease transfers slowly in pelt and reacts rapidly with collagen. The factors affecting the mass transfer of protease during bating process were investigated to find key points to avoid collagen damage. Decreasing the interfacial tension, the electrostatic attraction and the steric hindrance between protease and pelt enhanced the transfer of protease and reduced the damage to collagen.