The uniformity of the colour in leathers for the furnishing and <i>automotive</i> sectors is a particularly important feature, especially for white or light-coloured </span></span&g...The uniformity of the colour in leathers for the furnishing and <i>automotive</i> sectors is a particularly important feature, especially for white or light-coloured </span></span><span style="white-space:normal;"><span style="font-family:"">articles, intended to the high-end market;on these articles any colour alteration can be very visible and unpleasant, with possible technical and economic consequences for the producers. In a previous study, we analysed the possible causes behind the formation of some peculiar pink/salmon stains on different kinds of white/beige/light-coloured leather furnishing items, where we focalized our attention on TiO<sub>2</sub> properties and its possible interaction with some organic-based antioxidants. In recent years, due to many other similar cases of defects </span></span><span style="white-space:normal;"><span style="font-family:"">that </span></span><span style="white-space:normal;"><span style="font-family:"">occurred to tanners and to upholstery traders, we decided to enhance the investigations concerning this topic. More in detail we analysed, defective leathers, powder pigments and chemicals, in order to identify the possible role of some substances in this issue, with particular reference to some antioxidants and aluminosilicates, where several diagnostic techniques have been utilised, as ATR-IR (Attenuated Total Reflectance IR Spectroscopy), SEM-EDX (Scanning Electron Microscopy</span></span><span style="white-space:normal;"><span style="font-family:"">-</span></span><span style="white-space:normal;"><span style="font-family:"">Energy Dispersive X-ray Analysis), XRF (X-ray Fluorescence spectrometry)</span></span><span style="white-space:normal;"><span style="font-family:"">,</span></span><span style="white-space:normal;"><span style="font-family:""> GC-MS (Gas Chromatography-Mass Spectrometry), and DSC/TGA (Differential scanning calorimetry/Thermogravimetry) equipment.展开更多
In recent years,water evaporation-induced electricity has attracted a great deal of attention as an emerging green and renewable energy harvesting technology.Although abundant materials have been developed to fabricat...In recent years,water evaporation-induced electricity has attracted a great deal of attention as an emerging green and renewable energy harvesting technology.Although abundant materials have been developed to fabricate hydrovoltaic devices,the limitations of high costs,inconvenient storage and transport,low environmental benefits,and unadaptable shape have restricted their wide applications.Here,an electricity generator driven by water evaporation has been engineered based on natural biomass leather with inherent properties of good moisture permeability,excellent wettability,physicochemical stability,flexibility,and biocompatibility.Including numerous nano/microchannels together with rich oxygen-bearing functional groups,the natural leather-based water evaporator,Leather_(Emblic-NPs-SA/CB),could continuously produce electricity even staying outside,achieving a maximum output voltage of∼3 V with six-series connection.Furthermore,the leather-based water evaporator has enormous potential for use as a flexible self-powered electronic floor and seawater demineralizer due to its sensitive pressure sensing ability as well as its excellent photothermal conversion efficiency(96.3%)and thus fast water evaporation rate(2.65 kg m^(−2)h^(−1)).This work offers a new and functional material for the construction of hydrovoltaic devices to harvest the sustained green energy from water evaporation in arbitrary ambient environments,which shows great promise in their widespread applications.展开更多
Compared with those traditional initiating devices of anti-scalding systems,ionic thermoelectric sensors with energyautonomous performance show higher reliability.However,the current ionic thermoelectric materials(i-T...Compared with those traditional initiating devices of anti-scalding systems,ionic thermoelectric sensors with energyautonomous performance show higher reliability.However,the current ionic thermoelectric materials(i-TEs)suffer from complex nano-/micro-channel design,high production costs,environmentally unfriendly,weak mechanical properties,as well as the low moving speed of ions.Herein,the functional leather collagen fibers-bearing natural channels are employed as the polymer matrixes,while the trisodium citrate(SC)organic acid salt exhibits the function of cationic moving selfenhancement as the primary mobile ions for signaling.Including numerous and suitable nano-/micro-channels together with fast-moving cations,the leather-based i-TEs(LITE),LITE-SC0.75 M,possess excellent thermoelectric properties,achieving a Seebeck coefficient of 6.23 mV/K,a figure of merit of 0.084,and an energy conversion efficiency of 2.12%.Combined with its excellent thermal stability,mechanical performance,flexibility,durability,low cost,and outstanding capabilities for low-grade heat harvesting and thermal sensing,the LITE-SC0.75 M detector bearing long service life would show great promise in automatic anti-scalding alarm suitable for multiple scenarios and extreme environments.Therefore,the present work aims to design an efficient,robust,and energy-autonomous leather collagen fibers-based thermoelectric detector to address the limitation of current anti-scalding alarm technology as well as drive advancements in the nano-energy and its effective conversion field.展开更多
Nowadays, diverse leather usage conditions and increasing demands from consumers challenge the leather industry. Traditional leather manufacturing is facing long-term challenges, including low-value threshold, confine...Nowadays, diverse leather usage conditions and increasing demands from consumers challenge the leather industry. Traditional leather manufacturing is facing long-term challenges, including low-value threshold, confined applica-tion fields, and environmental issues. Leather inherits all the biomimetic properties of natural skin such as flexibility, sanitation, cold resistance, biocompatibility, biodegradability, and other cross-domain functions, achieving unre-mitting attention in multi-functional bio-based materials. Series of researches have been devoted to creating and developing leather-based flexible multi-functional bio-materials, including antibacterial leather, conductive leather, flame-retardant leather, self-cleaning leather, aromatic leather, and electromagnetic shielding leather. In this review, we provide a comprehensive overview of the commonly used leather-based functional materials. Furthermore, the possible challenges for the development of functional leathers are proposed, and expected development directions of leather-based functional materials are discussed. This review may promote and inspire the emerging preparation and applications of leather for flexible functional bio-based materials.展开更多
Nowadays,the increasing demands from consumer challenges the traditional leather products.Traditional polymer leather finishes gradually lose their dominant position in the market.To address this issue,recent research...Nowadays,the increasing demands from consumer challenges the traditional leather products.Traditional polymer leather finishes gradually lose their dominant position in the market.To address this issue,recent research effort has been devoted to developing polymer-based organic-inorganic nanocomposite leather finishes due to their various functional properties including antibacterial,self-cleaning and water-resistant property.In this review,we provide a comprehensive overview of synthesis of polymer-based organic-inorganic nanocomposites and their application as functional leather finishes.With the perspective of their properties and current challenges,an outlook in the future development about crafting functional and high-quality leather finishes are further proposed.展开更多
文摘The uniformity of the colour in leathers for the furnishing and <i>automotive</i> sectors is a particularly important feature, especially for white or light-coloured </span></span><span style="white-space:normal;"><span style="font-family:"">articles, intended to the high-end market;on these articles any colour alteration can be very visible and unpleasant, with possible technical and economic consequences for the producers. In a previous study, we analysed the possible causes behind the formation of some peculiar pink/salmon stains on different kinds of white/beige/light-coloured leather furnishing items, where we focalized our attention on TiO<sub>2</sub> properties and its possible interaction with some organic-based antioxidants. In recent years, due to many other similar cases of defects </span></span><span style="white-space:normal;"><span style="font-family:"">that </span></span><span style="white-space:normal;"><span style="font-family:"">occurred to tanners and to upholstery traders, we decided to enhance the investigations concerning this topic. More in detail we analysed, defective leathers, powder pigments and chemicals, in order to identify the possible role of some substances in this issue, with particular reference to some antioxidants and aluminosilicates, where several diagnostic techniques have been utilised, as ATR-IR (Attenuated Total Reflectance IR Spectroscopy), SEM-EDX (Scanning Electron Microscopy</span></span><span style="white-space:normal;"><span style="font-family:"">-</span></span><span style="white-space:normal;"><span style="font-family:"">Energy Dispersive X-ray Analysis), XRF (X-ray Fluorescence spectrometry)</span></span><span style="white-space:normal;"><span style="font-family:"">,</span></span><span style="white-space:normal;"><span style="font-family:""> GC-MS (Gas Chromatography-Mass Spectrometry), and DSC/TGA (Differential scanning calorimetry/Thermogravimetry) equipment.
基金supported by the National Natural Science Foundation of China(22308210)the Scientific Research Program Funded by Shaanxi Provincial Education Department(23JK0350)+3 种基金the Open Foundation of Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry,Ministry of Education,and Shaanxi Collaborative Innovation Center of Industrial Auxiliary Chemistry and Technology,Shaanxi University of Science and Technology(KFKT2021-12)the Opening Project of Key Laboratory of Leather Chemistry and Engineering(Sichuan University),Ministry of Education(2022)the RIKEN-MOST Project between the Ministry of Science and Technology of the People's Republic of China(MOST)and RIKEN,the China Scholarship Council(202108610127)the Natural Science Foundation of Shaanxi University of Science&Technology(2019BT-44).
文摘In recent years,water evaporation-induced electricity has attracted a great deal of attention as an emerging green and renewable energy harvesting technology.Although abundant materials have been developed to fabricate hydrovoltaic devices,the limitations of high costs,inconvenient storage and transport,low environmental benefits,and unadaptable shape have restricted their wide applications.Here,an electricity generator driven by water evaporation has been engineered based on natural biomass leather with inherent properties of good moisture permeability,excellent wettability,physicochemical stability,flexibility,and biocompatibility.Including numerous nano/microchannels together with rich oxygen-bearing functional groups,the natural leather-based water evaporator,Leather_(Emblic-NPs-SA/CB),could continuously produce electricity even staying outside,achieving a maximum output voltage of∼3 V with six-series connection.Furthermore,the leather-based water evaporator has enormous potential for use as a flexible self-powered electronic floor and seawater demineralizer due to its sensitive pressure sensing ability as well as its excellent photothermal conversion efficiency(96.3%)and thus fast water evaporation rate(2.65 kg m^(−2)h^(−1)).This work offers a new and functional material for the construction of hydrovoltaic devices to harvest the sustained green energy from water evaporation in arbitrary ambient environments,which shows great promise in their widespread applications.
基金supported by the National Natural Science Foundation of China(22308210)the Young Talent Fund of the Association for Science and Technology in Shaanxi of China(20240412)the Natural Science Foundation of Shaanxi University of Science&Technology(2019BT-44).
文摘Compared with those traditional initiating devices of anti-scalding systems,ionic thermoelectric sensors with energyautonomous performance show higher reliability.However,the current ionic thermoelectric materials(i-TEs)suffer from complex nano-/micro-channel design,high production costs,environmentally unfriendly,weak mechanical properties,as well as the low moving speed of ions.Herein,the functional leather collagen fibers-bearing natural channels are employed as the polymer matrixes,while the trisodium citrate(SC)organic acid salt exhibits the function of cationic moving selfenhancement as the primary mobile ions for signaling.Including numerous and suitable nano-/micro-channels together with fast-moving cations,the leather-based i-TEs(LITE),LITE-SC0.75 M,possess excellent thermoelectric properties,achieving a Seebeck coefficient of 6.23 mV/K,a figure of merit of 0.084,and an energy conversion efficiency of 2.12%.Combined with its excellent thermal stability,mechanical performance,flexibility,durability,low cost,and outstanding capabilities for low-grade heat harvesting and thermal sensing,the LITE-SC0.75 M detector bearing long service life would show great promise in automatic anti-scalding alarm suitable for multiple scenarios and extreme environments.Therefore,the present work aims to design an efficient,robust,and energy-autonomous leather collagen fibers-based thermoelectric detector to address the limitation of current anti-scalding alarm technology as well as drive advancements in the nano-energy and its effective conversion field.
基金the National Natural Science Foundation of China(2207081675)Science and Technology Project of Xianyang City(Grant 2018k02-28)+3 种基金Fellowship of China Postdoctoral Science Foundation(2021M692000)Key R&D Program of Shaanxi Province(2022GY-272)Young Talent Support Program Project of Shaanxi University Science and Technology Association(20200424)Department of education’s Production-Study-Research combined innovation Funding-“Blue fire plan(Huizhou)”of 2018(CXZJHZ201801).
文摘Nowadays, diverse leather usage conditions and increasing demands from consumers challenge the leather industry. Traditional leather manufacturing is facing long-term challenges, including low-value threshold, confined applica-tion fields, and environmental issues. Leather inherits all the biomimetic properties of natural skin such as flexibility, sanitation, cold resistance, biocompatibility, biodegradability, and other cross-domain functions, achieving unre-mitting attention in multi-functional bio-based materials. Series of researches have been devoted to creating and developing leather-based flexible multi-functional bio-materials, including antibacterial leather, conductive leather, flame-retardant leather, self-cleaning leather, aromatic leather, and electromagnetic shielding leather. In this review, we provide a comprehensive overview of the commonly used leather-based functional materials. Furthermore, the possible challenges for the development of functional leathers are proposed, and expected development directions of leather-based functional materials are discussed. This review may promote and inspire the emerging preparation and applications of leather for flexible functional bio-based materials.
基金National Key Research and Development Program of China(2017YFB0308602)Key Scientific Research Group of Shaanxi province(2013KCT-08)+1 种基金Young Talent Lifts Planning Project of Shaanxi Provicial University Science Association(20180416)Scientific Research Innovation Team Building Project of Shaanxi University of Science and Technology(TD12-03).
文摘Nowadays,the increasing demands from consumer challenges the traditional leather products.Traditional polymer leather finishes gradually lose their dominant position in the market.To address this issue,recent research effort has been devoted to developing polymer-based organic-inorganic nanocomposite leather finishes due to their various functional properties including antibacterial,self-cleaning and water-resistant property.In this review,we provide a comprehensive overview of synthesis of polymer-based organic-inorganic nanocomposites and their application as functional leather finishes.With the perspective of their properties and current challenges,an outlook in the future development about crafting functional and high-quality leather finishes are further proposed.
