Sustainable Materials and Technologies最新文献_第5页

Fundamental insights into the covalent adaptable networks of phosphate esters: Effects of condensation and of the dynamic exchange of phosphate diesters with hydroxyl groups

IF 8.6 2区工程技术 Q1 ENERGY & FUELS

Sustainable Materials and Technologies

Pub Date : 2025-01-23 DOI: 10.1016/j.susmat.2025.e01270

Patrycja Banaszek, Maciej Podgórski

Vitrimers are one of the most widely studied and implemented classes of sustainable engineering plastics today. Among the vitrimers, the transesterification of carboxylate esters is dominant, although in recent years the transesterification of phosphate esters has gained attention due to the favorable exchange conditions between phosphate esters and hydroxyls and the autocatalytic effect of the phosphate group. Mono-, di- and tri-ester phosphates are all used in vitrimers and offer various advantages as exchangeable groups or internal transesterification catalysts. Here we have systematically studied the dynamic exchange in methacrylate photopolymer networks crosslinked with phosphate diesters and shown that, in addition to exchange, there is a significant condensation reaction between diester phosphates and free hydroxyl that accompanies the exchange process. When heated to temperatures above 120 °C, phosphate diesters are converted in situ to triesters, resulting in up to a 50-fold increase in elastic modulus, a 40 °C increase in glass transition temperature and a 50-fold increase in mechanical strength. The kinetics of the condensation was studied by differential scanning calorimetry (DSC) and the evolution of the properties by dynamic mechanical analysis (DMA). The dynamic properties were evaluated in stress relaxation experiments and were found to be complex. The relaxation curves were fitted to a two-element Maxwell model and showed that the dynamic behavior and mechanical properties evolve during condensation. This research highlights new aspects of phosphate ester exchange that need to be considered in the design of dynamic networks, and would also serve as a guide in the selection of phosphate group type for dynamic materials applications.

{"title":"Fundamental insights into the covalent adaptable networks of phosphate esters: Effects of condensation and of the dynamic exchange of phosphate diesters with hydroxyl groups","authors":"Patrycja Banaszek, Maciej Podgórski","doi":"10.1016/j.susmat.2025.e01270","DOIUrl":"10.1016/j.susmat.2025.e01270","url":null,"abstract":"<div><div>Vitrimers are one of the most widely studied and implemented classes of sustainable engineering plastics today. Among the vitrimers, the transesterification of carboxylate esters is dominant, although in recent years the transesterification of phosphate esters has gained attention due to the favorable exchange conditions between phosphate esters and hydroxyls and the autocatalytic effect of the phosphate group. Mono-, di- and tri-ester phosphates are all used in vitrimers and offer various advantages as exchangeable groups or internal transesterification catalysts. Here we have systematically studied the dynamic exchange in methacrylate photopolymer networks crosslinked with phosphate diesters and shown that, in addition to exchange, there is a significant condensation reaction between diester phosphates and free hydroxyl that accompanies the exchange process. When heated to temperatures above 120 °C, phosphate diesters are converted in situ to triesters, resulting in up to a 50-fold increase in elastic modulus, a 40 °C increase in glass transition temperature and a 50-fold increase in mechanical strength. The kinetics of the condensation was studied by differential scanning calorimetry (DSC) and the evolution of the properties by dynamic mechanical analysis (DMA). The dynamic properties were evaluated in stress relaxation experiments and were found to be complex. The relaxation curves were fitted to a two-element Maxwell model and showed that the dynamic behavior and mechanical properties evolve during condensation. This research highlights new aspects of phosphate ester exchange that need to be considered in the design of dynamic networks, and would also serve as a guide in the selection of phosphate group type for dynamic materials applications.</div></div>","PeriodicalId":22097,"journal":{"name":"Sustainable Materials and Technologies","volume":"43 ","pages":"Article e01270"},"PeriodicalIF":8.6,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Differences in the performance of broad-spectrum UV-absorbing carbon dots arising from diverse purification

IF 8.6 2区工程技术 Q1 ENERGY & FUELS

Sustainable Materials and Technologies

Pub Date : 2025-01-21 DOI: 10.1016/j.susmat.2025.e01256

Weihao Ye, Xinyu Huang, Yan Zhang, Yingliang Liu

Excessive ultraviolet radiation gradually affects human health, the growth of animals or plants and the stability of materials with the deterioration of global climate. In this paper, we used aromatic compounds to prepare the three-component water soluble carbon dots (Im-CDs) through the hydrothermal method, which has broad-spectrum ultraviolet (UV) absorption. However, the stability of CDs with UV absorption still presents certain challenges. It was found that the bottom-up synthesis of CDs generally results in the production of small molecular or oligo-fluorescent by-products. Inadequate purification can lead to misinterpretation of their properties and characteristics. Therefore, the prepared CDs were purified using conventional dialysis, prolonged dialysis, and silica gel column chromatography to compare the effects and errors of different purification methods on the results. Based on the resulting purification process, the structure model of the Im-CDs suggested that the carbon core possesses a core-shell structure along with weakly attached ligands on its surface rather than strong force. After chromatography, the Im-CDs had better heat, UV and acid-base resistance compared to other purification methods. The appropriate purification for CDs is therefore a crucial step in order to fulfill the prerequisites for practical applications. This is of great significance for the industrialization of CDs.

{"title":"Differences in the performance of broad-spectrum UV-absorbing carbon dots arising from diverse purification","authors":"Weihao Ye, Xinyu Huang, Yan Zhang, Yingliang Liu","doi":"10.1016/j.susmat.2025.e01256","DOIUrl":"10.1016/j.susmat.2025.e01256","url":null,"abstract":"<div><div>Excessive ultraviolet radiation gradually affects human health, the growth of animals or plants and the stability of materials with the deterioration of global climate. In this paper, we used aromatic compounds to prepare the three-component water soluble carbon dots (Im-CDs) through the hydrothermal method, which has broad-spectrum ultraviolet (UV) absorption. However, the stability of CDs with UV absorption still presents certain challenges. It was found that the bottom-up synthesis of CDs generally results in the production of small molecular or oligo-fluorescent by-products. Inadequate purification can lead to misinterpretation of their properties and characteristics. Therefore, the prepared CDs were purified using conventional dialysis, prolonged dialysis, and silica gel column chromatography to compare the effects and errors of different purification methods on the results. Based on the resulting purification process, the structure model of the Im-CDs suggested that the carbon core possesses a core-shell structure along with weakly attached ligands on its surface rather than strong force. After chromatography, the Im-CDs had better heat, UV and acid-base resistance compared to other purification methods. The appropriate purification for CDs is therefore a crucial step in order to fulfill the prerequisites for practical applications. This is of great significance for the industrialization of CDs.</div></div>","PeriodicalId":22097,"journal":{"name":"Sustainable Materials and Technologies","volume":"43 ","pages":"Article e01256"},"PeriodicalIF":8.6,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Novel production process for lithium sulfide from lithium hydroxide by reacting with hydrogen sulfide gas generated from iron sulfide

IF 8.6 2区工程技术 Q1 ENERGY & FUELS

Sustainable Materials and Technologies

Pub Date : 2025-01-21 DOI: 10.1016/j.susmat.2025.e01269

Sung-Hun Park , Beommo Choi , Jaehyun Kim , Ho Won Jang , Jungshin Kang

The efficient production of lithium sulfide (Li₂S), a key raw material for sulfide electrolytes in all-solid-state batteries, is important owing to its high cost. In this study, an efficient method for producing high-purity Li₂S by the reaction between lithium hydroxide (LiOH) and hydrogen sulfide (H₂S) gas was investigated. The study used H₂S gas generated from the dissolution of iron sulfide (FeS) in a sulfuric acid (H₂SO₄) solution at 298 K. When reactions between LiOH and the generated H₂S gas were performed at 373–673 K for 1 h, Li₂S was obtained. Notably, the generation of sulfur was observed when the reaction temperature was above 573 K. Based on the experimental results and thermodynamic analysis, the principle of Li₂S production by the reaction of LiOH with H₂S gas is described. This study suggests the feasibility of the direct production of Li₂S from LiOH by reacting H₂S gas and the utilization of FeS as a source of H₂S gas to reduce its environmental impact.

{"title":"Novel production process for lithium sulfide from lithium hydroxide by reacting with hydrogen sulfide gas generated from iron sulfide","authors":"Sung-Hun Park , Beommo Choi , Jaehyun Kim , Ho Won Jang , Jungshin Kang","doi":"10.1016/j.susmat.2025.e01269","DOIUrl":"10.1016/j.susmat.2025.e01269","url":null,"abstract":"<div><div>The efficient production of lithium sulfide (Li<sub>2</sub>S), a key raw material for sulfide electrolytes in all-solid-state batteries, is important owing to its high cost. In this study, an efficient method for producing high-purity Li<sub>2</sub>S by the reaction between lithium hydroxide (LiOH) and hydrogen sulfide (H<sub>2</sub>S) gas was investigated. The study used H<sub>2</sub>S gas generated from the dissolution of iron sulfide (FeS) in a sulfuric acid (H<sub>2</sub>SO<sub>4</sub>) solution at 298 K. When reactions between LiOH and the generated H<sub>2</sub>S gas were performed at 373–673 K for 1 h, Li<sub>2</sub>S was obtained. Notably, the generation of sulfur was observed when the reaction temperature was above 573 K. Based on the experimental results and thermodynamic analysis, the principle of Li<sub>2</sub>S production by the reaction of LiOH with H<sub>2</sub>S gas is described. This study suggests the feasibility of the direct production of Li<sub>2</sub>S from LiOH by reacting H<sub>2</sub>S gas and the utilization of FeS as a source of H<sub>2</sub>S gas to reduce its environmental impact.</div></div>","PeriodicalId":22097,"journal":{"name":"Sustainable Materials and Technologies","volume":"43 ","pages":"Article e01269"},"PeriodicalIF":8.6,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

FeNi bimetallic functionalized lignin catalyst for sustainable oxidation processes

IF 8.6 2区工程技术 Q1 ENERGY & FUELS

Sustainable Materials and Technologies

Pub Date : 2025-01-21 DOI: 10.1016/j.susmat.2025.e01267

Mehdi Mennani , Youness Abdellaoui , Anass Ait Benhamou , Eduardo Alberto Lopez-Maldonado , Meriem Kasbaji , Mounir El Achaby , Amine Moubarik , Zineb Kassab

The advancement of sustainable and efficient catalytic procedures is crucial in tackling the continuous environmental and industrial challenges, with research being inherently focused on sustainable chemical science to exploit the possibilities of cost-effective bio-based materials for practical applications. Considerably, this investigation delves into the synthesis, characterization, and use of FeNi bimetallic functionalized lignin (FeNi@Lig) catalysts using lignin extracted from spent coffee grounds, an underutilized agro-industrial waste. This eco-friendly approach emphasizes the valorization of non-traditional biomass while reducing waste streams. FeNi@Lig was used for oxidation processes, concentrating on the oxidation of bromothymol blue and cellulose for environmental remediation and the production of valuable chemicals. By capitalizing on the multifaceted attributes of lignin, FeNi@Lig catalysts were produced and examined using several techniques, uncovering an effective dispersion of Fe and Ni nanoparticles on the lignin support. The catalysts displayed remarkable efficiency and selectivity in oxidative processes, notably boosting reaction speeds and diminishing the creation of unwanted side products. The oxidation of bromothymol blue (BB) was carried out with a 2 % catalyst, yielding a conversion efficiency of 99.35 % in just 180 s. Likewise, the optimal cellulose oxidation exhibited an oxidation degree of 91.11 % with a 5 % catalyst. The outcomes emphasize the promise of catalysts derived from biomass in industrial settings, advocating for sustainable methodologies and propelling the realm of eco-friendly chemistry.

{"title":"FeNi bimetallic functionalized lignin catalyst for sustainable oxidation processes","authors":"Mehdi Mennani , Youness Abdellaoui , Anass Ait Benhamou , Eduardo Alberto Lopez-Maldonado , Meriem Kasbaji , Mounir El Achaby , Amine Moubarik , Zineb Kassab","doi":"10.1016/j.susmat.2025.e01267","DOIUrl":"10.1016/j.susmat.2025.e01267","url":null,"abstract":"<div><div>The advancement of sustainable and efficient catalytic procedures is crucial in tackling the continuous environmental and industrial challenges, with research being inherently focused on sustainable chemical science to exploit the possibilities of cost-effective bio-based materials for practical applications. Considerably, this investigation delves into the synthesis, characterization, and use of Fe<img>Ni bimetallic functionalized lignin (FeNi@Lig) catalysts using lignin extracted from spent coffee grounds, an underutilized agro-industrial waste. This eco-friendly approach emphasizes the valorization of non-traditional biomass while reducing waste streams. FeNi@Lig was used for oxidation processes, concentrating on the oxidation of bromothymol blue and cellulose for environmental remediation and the production of valuable chemicals. By capitalizing on the multifaceted attributes of lignin, FeNi@Lig catalysts were produced and examined using several techniques, uncovering an effective dispersion of Fe and Ni nanoparticles on the lignin support. The catalysts displayed remarkable efficiency and selectivity in oxidative processes, notably boosting reaction speeds and diminishing the creation of unwanted side products. The oxidation of bromothymol blue (BB) was carried out with a 2 % catalyst, yielding a conversion efficiency of 99.35 % in just 180 s. Likewise, the optimal cellulose oxidation exhibited an oxidation degree of 91.11 % with a 5 % catalyst. The outcomes emphasize the promise of catalysts derived from biomass in industrial settings, advocating for sustainable methodologies and propelling the realm of eco-friendly chemistry.</div></div>","PeriodicalId":22097,"journal":{"name":"Sustainable Materials and Technologies","volume":"43 ","pages":"Article e01267"},"PeriodicalIF":8.6,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simultaneous solar steam and hydrovoltaic power generation from a volcanic-shaped surface-area-enhanced cement‑carbon composite

IF 8.6 2区工程技术 Q1 ENERGY & FUELS

Sustainable Materials and Technologies

Pub Date : 2025-01-20 DOI: 10.1016/j.susmat.2025.e01264

Sujith Lal , A. Harikrishnan , Byungil Hwang , Sudip K. Batabyal

Simultaneous dual-energy harvesting has gained significant interest in the research community due to its ability to provide substantial benefits at once. By combining solar thermal interfacial evaporation (STIE) with hydrovoltaic (HV) mechanisms, researchers have developed a promising approach to generate both freshwater and electricity simultaneously. In this study, a novel volcanic-shaped device, coated with a salt-treated porous cement‑carbon composite, was created to achieve impressive performance in both evaporation and power generation. The device demonstrated an evaporation rate of 2.6 kg/m²/h, a maximum voltage of 0.5 V, and a current of 42 μA under standard sunlight conditions (1-sun illumination). Additionally, the device showed excellent capabilities in purifying water and delivering power, making it suitable for large-scale applications. Experiments were conducted to evaluate its power generation performance, successfully powering light-emitting diodes and small electronic devices such as calculators and thermocouples. A solar still with an average light exposure area of 644 cm² was also constructed, producing approximately 330–345 mL of freshwater over 8 h. The total dissolved solids (TDS) in the collected water were significantly reduced from 772 ppm in the original bulk water to just 13 ppm, confirming its suitability for human consumption. This innovative device has the potential to address critical future energy needs by providing both freshwater and electrical power sustainably and efficiently.

{"title":"Simultaneous solar steam and hydrovoltaic power generation from a volcanic-shaped surface-area-enhanced cement‑carbon composite","authors":"Sujith Lal , A. Harikrishnan , Byungil Hwang , Sudip K. Batabyal","doi":"10.1016/j.susmat.2025.e01264","DOIUrl":"10.1016/j.susmat.2025.e01264","url":null,"abstract":"<div><div>Simultaneous dual-energy harvesting has gained significant interest in the research community due to its ability to provide substantial benefits at once. By combining solar thermal interfacial evaporation (STIE) with hydrovoltaic (HV) mechanisms, researchers have developed a promising approach to generate both freshwater and electricity simultaneously. In this study, a novel volcanic-shaped device, coated with a salt-treated porous cement‑carbon composite, was created to achieve impressive performance in both evaporation and power generation. The device demonstrated an evaporation rate of 2.6 kg/m<sup>2</sup>/h, a maximum voltage of 0.5 V, and a current of 42 μA under standard sunlight conditions (1-sun illumination). Additionally, the device showed excellent capabilities in purifying water and delivering power, making it suitable for large-scale applications. Experiments were conducted to evaluate its power generation performance, successfully powering light-emitting diodes and small electronic devices such as calculators and thermocouples. A solar still with an average light exposure area of 644 cm<sup>2</sup> was also constructed, producing approximately 330–345 mL of freshwater over 8 h. The total dissolved solids (TDS) in the collected water were significantly reduced from 772 ppm in the original bulk water to just 13 ppm, confirming its suitability for human consumption. This innovative device has the potential to address critical future energy needs by providing both freshwater and electrical power sustainably and efficiently.</div></div>","PeriodicalId":22097,"journal":{"name":"Sustainable Materials and Technologies","volume":"43 ","pages":"Article e01264"},"PeriodicalIF":8.6,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Enhancing papermaking with nanocellulose and chitosan: Synergistic approaches for eco-friendly production

IF 8.6 2区工程技术 Q1 ENERGY & FUELS

Sustainable Materials and Technologies

Pub Date : 2025-01-20 DOI: 10.1016/j.susmat.2025.e01252

Ng Yie Ling , R.A. Ilyas , Rafidah Jalil , Rushdan Ibrahim , H.S.N. Hawanis , H.A.A. Azriena , Rohah Abdul Majid , N.H.M. Hassan , M.S.N. Atikah , Abu Hassan Nordin

The expanding demand for paper production has significantly contributed to the global economy, but it also presents substantial environmental challenges due to the diverse waste streams generated by the industry. To address these issues, eco-friendly biomaterials or also known as biopolymers are increasingly advocated in the papermaking process. The application of biopolymers in pulp and paper industries is focusing in improving the paper products performance especially for packaging paper products. Two promising sustainable materials are nanocellulose and chitosan. Nanocellulose, known for its abundance and biodegradability, serves as an effective additive in paper production, enhancing strength, retention, filtration, and coating properties. Chitosan, derived from chitin, the second most abundant polysaccharide in nature, is a renewable, non-toxic biomaterial with high cationic charge density, antibacterial properties, and excellent biocompatibility with cellulose. Its integration into papermaking enhances both dry and wet strength by forming hydrogen bonds with nanocellulose, thus improving the physical, mechanical, thermal, and antimicrobial properties of paper. The synergy between nanocellulose and chitosan not only enhances the overall quality of the paper but also supports the production of various types of paper, including packaging, printing, speciality, and textile paper. This approach underscores the role of sustainable biomaterials in innovating the papermaking industry while reducing its environmental footprint.

{"title":"Enhancing papermaking with nanocellulose and chitosan: Synergistic approaches for eco-friendly production","authors":"Ng Yie Ling , R.A. Ilyas , Rafidah Jalil , Rushdan Ibrahim , H.S.N. Hawanis , H.A.A. Azriena , Rohah Abdul Majid , N.H.M. Hassan , M.S.N. Atikah , Abu Hassan Nordin","doi":"10.1016/j.susmat.2025.e01252","DOIUrl":"10.1016/j.susmat.2025.e01252","url":null,"abstract":"<div><div>The expanding demand for paper production has significantly contributed to the global economy, but it also presents substantial environmental challenges due to the diverse waste streams generated by the industry. To address these issues, eco-friendly biomaterials or also known as biopolymers are increasingly advocated in the papermaking process. The application of biopolymers in pulp and paper industries is focusing in improving the paper products performance especially for packaging paper products. Two promising sustainable materials are nanocellulose and chitosan. Nanocellulose, known for its abundance and biodegradability, serves as an effective additive in paper production, enhancing strength, retention, filtration, and coating properties. Chitosan, derived from chitin, the second most abundant polysaccharide in nature, is a renewable, non-toxic biomaterial with high cationic charge density, antibacterial properties, and excellent biocompatibility with cellulose. Its integration into papermaking enhances both dry and wet strength by forming hydrogen bonds with nanocellulose, thus improving the physical, mechanical, thermal, and antimicrobial properties of paper. The synergy between nanocellulose and chitosan not only enhances the overall quality of the paper but also supports the production of various types of paper, including packaging, printing, speciality, and textile paper. This approach underscores the role of sustainable biomaterials in innovating the papermaking industry while reducing its environmental footprint.</div></div>","PeriodicalId":22097,"journal":{"name":"Sustainable Materials and Technologies","volume":"43 ","pages":"Article e01252"},"PeriodicalIF":8.6,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Ecofriendly nanoprobe for differentiation between hydrogen peroxide producing bacteria and nonproducers: Zero waste circular economy of cooking and harvesting of energy

IF 8.6 2区工程技术 Q1 ENERGY & FUELS

Sustainable Materials and Technologies

Pub Date : 2025-01-20 DOI: 10.1016/j.susmat.2025.e01265

Aya A. Abdella , Engy El-Ekhnawy , Sherin F. Hammad , Samah F. Elmalla

A novel, affordable, and environmentally benign highly fluorescent carbon dots valorized from ignited peel of flame roasted eggplant (EPCDs) were introduced for the first time. The EPCDs were spontaneously and rapidly formed during eggplant roasting, for only 5 min, with high quantum yield (28.5 %). The emission of EPCDs was selectively quenched in the presence of Fe³⁺ through a mixed static quenching/ inner filter mechanism. Accordingly, a turn-off sensing platform composed of EPCDs coupled to Fe²⁺ enabled the highly sensitive detection of hydrogen peroxide (H₂O₂) through an acetate mediated Fe²⁺ oxidation. Acetate could boost sensor sensitivity by blocking Fe²⁺ back conversion to Fe³⁺ enabling the rapid detection of H₂O₂ down to concentration range from 13.12 to 87.55 nM, with very good accuracy (100 % ± 3), precision (%RSD < 3) and low detection limit (3.88 nM). The sensor was applied for H₂O₂ detection in different water samples as well as for the differentiation of H₂O₂-producing bacteria from nonproducers, for the first time, in liquid cell culture without any pretreatment step. The utilized EPCDs showed ecological superiority on Complex GAPI and AGREE metrics in addition to a 250-fold reduction in CO₂ emission compared to the greenest reported H₂O₂ sensor paving the way for circular economy practice.

{"title":"Ecofriendly nanoprobe for differentiation between hydrogen peroxide producing bacteria and nonproducers: Zero waste circular economy of cooking and harvesting of energy","authors":"Aya A. Abdella , Engy El-Ekhnawy , Sherin F. Hammad , Samah F. Elmalla","doi":"10.1016/j.susmat.2025.e01265","DOIUrl":"10.1016/j.susmat.2025.e01265","url":null,"abstract":"<div><div>A novel, affordable, and environmentally benign highly fluorescent carbon dots valorized from ignited peel of flame roasted eggplant (EPCDs) were introduced for the first time. The EPCDs were spontaneously and rapidly formed during eggplant roasting, for only 5 min, with high quantum yield (28.5 %). The emission of EPCDs was selectively quenched in the presence of Fe<sup>3+</sup> through a mixed static quenching/ inner filter mechanism. Accordingly, a turn-off sensing platform composed of EPCDs coupled to Fe<sup>2+</sup> enabled the highly sensitive detection of hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) through an acetate mediated Fe<sup>2+</sup> oxidation. Acetate could boost sensor sensitivity by blocking Fe<sup>2+</sup> back conversion to Fe<sup>3+</sup> enabling the rapid detection of H<sub>2</sub>O<sub>2</sub> down to concentration range from 13.12 to 87.55 nM, with very good accuracy (100 % ± 3), precision (%RSD < 3) and low detection limit (3.88 nM). The sensor was applied for H<sub>2</sub>O<sub>2</sub> detection in different water samples as well as for the differentiation of H<sub>2</sub>O<sub>2</sub>-producing bacteria from nonproducers, for the first time, in liquid cell culture without any pretreatment step. The utilized EPCDs showed ecological superiority on Complex GAPI and AGREE metrics in addition to a 250-fold reduction in CO<sub>2</sub> emission compared to the greenest reported H<sub>2</sub>O<sub>2</sub> sensor paving the way for circular economy practice.</div></div>","PeriodicalId":22097,"journal":{"name":"Sustainable Materials and Technologies","volume":"43 ","pages":"Article e01265"},"PeriodicalIF":8.6,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Exploring printing methods for continuous natural fiber-reinforced thermoplastic biocomposites: A comparative study

IF 8.6 2区工程技术 Q1 ENERGY & FUELS

Sustainable Materials and Technologies

Pub Date : 2025-01-20 DOI: 10.1016/j.susmat.2025.e01253

Natália V. dos Santos , Alberto Giubilini , Daniel Carlos T. Cardoso , Paolo Minetola

Continuous Fiber-Reinforced Thermoplastic Composites (CFRTPCs) are revolutionizing various industry sectors by enabling a combination of design, optimization, and high performance. The use of continuous natural fiber reinforcement integrates these factors with the potential for developing a sustainable product with a lower ecological footprint compared to tradition composites. However, challenges such as optimizing fiber-matrix impregnation and the identification of the most suitable manufacturing process for structural components remain significant. The objective of this study is to address these challenges by comparing the two main continuous printing methodologies - in-situ impregnation and semi-finished filament fabrication -in their application to natural fiber-reinforced composites. To achieve this, a method for manufacturing semi-finished filaments was developed and compared with the in-nozzle impregnation process by modifying a commercially available 3D printer. Image analysis, surface roughness measurements, deposition rates, and mechanical tests revealed that the semi-finished filament method resulted in better fiber-matrix impregnation, significantly improving tensile strength and elastic modulus by up to 18.4 % compared to the in-nozzle method. Additionally, the semi-finished filament process demonstrated a higher deposition rate, reaching 400 mm/s, compared to 300 mm/s for the in-nozzle process.

{"title":"Exploring printing methods for continuous natural fiber-reinforced thermoplastic biocomposites: A comparative study","authors":"Natália V. dos Santos , Alberto Giubilini , Daniel Carlos T. Cardoso , Paolo Minetola","doi":"10.1016/j.susmat.2025.e01253","DOIUrl":"10.1016/j.susmat.2025.e01253","url":null,"abstract":"<div><div>Continuous Fiber-Reinforced Thermoplastic Composites (CFRTPCs) are revolutionizing various industry sectors by enabling a combination of design, optimization, and high performance. The use of continuous natural fiber reinforcement integrates these factors with the potential for developing a sustainable product with a lower ecological footprint compared to tradition composites. However, challenges such as optimizing fiber-matrix impregnation and the identification of the most suitable manufacturing process for structural components remain significant. The objective of this study is to address these challenges by comparing the two main continuous printing methodologies - <em>in-situ</em> impregnation and semi-finished filament fabrication -in their application to natural fiber-reinforced composites. To achieve this, a method for manufacturing semi-finished filaments was developed and compared with the in-nozzle impregnation process by modifying a commercially available 3D printer. Image analysis, surface roughness measurements, deposition rates, and mechanical tests revealed that the semi-finished filament method resulted in better fiber-matrix impregnation, significantly improving tensile strength and elastic modulus by up to 18.4 % compared to the in-nozzle method. Additionally, the semi-finished filament process demonstrated a higher deposition rate, reaching 400 mm/s, compared to 300 mm/s for the in-nozzle process.</div></div>","PeriodicalId":22097,"journal":{"name":"Sustainable Materials and Technologies","volume":"43 ","pages":"Article e01253"},"PeriodicalIF":8.6,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental and computational approaches to optimizing the development of NFs reinforced polymer composite: A review of optimization strategies

IF 8.6 2区工程技术 Q1 ENERGY & FUELS

Sustainable Materials and Technologies

Pub Date : 2025-01-20 DOI: 10.1016/j.susmat.2025.e01259

Olajesu Favor Olanrewaju , Justus Uchenna Anaele , Sodiq Abiodun Kareem

Due to increased environmental campaigns, natural fibers (NF) are receiving much interest as cost-efficient substitutes for synthetic fibers for engineering applications because they are eco-friendly, lightweight, and have excellent mechanical strength. However, NF-reinforced polymer composites (NFRPCs) sourced from plants and animals are hydrophilic, primarily incompatible with hydrophobic thermoplastics, and prone to moisture damage. To counter these challenges, there has been considerable attention to different optimization strategies for improving the properties of NFRPCs. This review encompasses the properties of various NFs (plants and animals) and the optimization strategies for enhancing interfacial shear strength and mechanical, fracture, and water absorption behavior. The review also covers the optimization strategies for improving the thermal, flame retardancy, temperature, and strain rate-dependent behavior of NFRPCs. Additionally, this review discussed optimization computational approaches, existing gaps in literature, and potential future directions for optimizing NFRPC development.

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引用次数: 0

Flexible biodegradable wearables based on conductive leaf networks

IF 8.6 2区工程技术 Q1 ENERGY & FUELS

Sustainable Materials and Technologies

Pub Date : 2025-01-19 DOI: 10.1016/j.susmat.2025.e01263

Min-Hsuan Lee , Kuan-Hsiang Teng , Ya-Yu Liang , Chien-Fang Ding , Ying-Chun Chen

Electronic waste (E-waste) pollution is a global environmental problem because it contains various contaminants, including hazardous heavy metals and toxic chemicals. These contaminants may accumulate in the environment and pollute oceans worldwide, seriously threatening the environment and human health. Besides, agricultural wastes burning from straw and leaves may be the most significant contributor to haze particulate matter (PM) air pollution in developing countries. Developing biodegradable green electronics based on the circular economy principle is an ideal solution to address the above waste-related environmental issues. In this study, we report on a biodegradable conductor, integrating Poly (3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS)-based nanocomposites into leaf skeletons (used as substrates). In addition, the effective drop-casting technique is used to prepare biodegradable conductors for potential utility in lightweight wearable devices. The biodegradable conductor exhibits a remarkable sheet resistance of 2.4 ± 0.6 Ω sq.⁻¹ with one drop-casting step. Raman spectroscopy demonstrated that the enhanced electrical performance of the conductive leaf is attributed to an increase in the predominant quinoid structure of PEDOT chains. It is proved that this high-performance biodegradable conductor can be applied as a promising component for various next-generation wearable electronics, including electrocardiogram (ECG) electrodes and flexible strain sensors, demonstrating promising potential for the development of United Nation's Sustainable Development Goals (SDGs) in green electronics.

{"title":"Flexible biodegradable wearables based on conductive leaf networks","authors":"Min-Hsuan Lee , Kuan-Hsiang Teng , Ya-Yu Liang , Chien-Fang Ding , Ying-Chun Chen","doi":"10.1016/j.susmat.2025.e01263","DOIUrl":"10.1016/j.susmat.2025.e01263","url":null,"abstract":"<div><div>Electronic waste (<em>E</em>-waste) pollution is a global environmental problem because it contains various contaminants, including hazardous heavy metals and toxic chemicals. These contaminants may accumulate in the environment and pollute oceans worldwide, seriously threatening the environment and human health. Besides, agricultural wastes burning from straw and leaves may be the most significant contributor to haze particulate matter (PM) air pollution in developing countries. Developing biodegradable green electronics based on the circular economy principle is an ideal solution to address the above waste-related environmental issues. In this study, we report on a biodegradable conductor, integrating Poly (3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS)-based nanocomposites into leaf skeletons (used as substrates). In addition, the effective drop-casting technique is used to prepare biodegradable conductors for potential utility in lightweight wearable devices. The biodegradable conductor exhibits a remarkable sheet resistance of 2.4 ± 0.6 Ω sq.<sup>−1</sup> with one drop-casting step. Raman spectroscopy demonstrated that the enhanced electrical performance of the conductive leaf is attributed to an increase in the predominant quinoid structure of PEDOT chains. It is proved that this high-performance biodegradable conductor can be applied as a promising component for various next-generation wearable electronics, including electrocardiogram (ECG) electrodes and flexible strain sensors, demonstrating promising potential for the development of United Nation's Sustainable Development Goals (SDGs) in green electronics.</div></div>","PeriodicalId":22097,"journal":{"name":"Sustainable Materials and Technologies","volume":"43 ","pages":"Article e01263"},"PeriodicalIF":8.6,"publicationDate":"2025-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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