Pub Date : 2024-11-19DOI: 10.1016/j.cej.2024.157773
Chenyu Zhou, Zhenfeng Zhong, Huaizhi Yang, Yan Zhang, Zhiquan Pan, Hong Zhou
Preparation of fire safety and high mechanical strength epoxy resin (EP) has become a hot topic for its valuable applications in construction and other fields. Here, bis-2-aminobenzimidazole-modified phenyl phosphonates (PP-BMI) with symmetric structures were synthesized by a simple chemical modification strategy, and its fine structure and composition have been thoroughly characterized. Due to the multifaceted functions of PP-BMI in both gaseous and condensed phases, EP composite with 5 wt% PP-BMI reached a UL-94 V-0 rating and high LOI of 34.3 %. The excellent fire safety of EP/5PP-BMI was further verified with a significant reduction of 57 %, 52 % and 46 % in peak heat release rate (PHRR), total heat release (THR) and peak CO production (P-COP), respectively, compared to the original EP. The flame retardancy of PP-BMI on EP can be attributed to the dilution of non-combustion gases, free radical trapping and catalytic charring functions. More importantly, PP-BMI can further enhance the mechanical properties of EP, which is closely related to the interaction between PP-BMI and EP matrix. Furthermore, EP/PP-BMI composites have good resistance to acids and alkalis, ensuring long-lasting flame retardancy and mechanical properties. This work provides a new strategy for realizing epoxy composites with high fire safety and excellent mechanical properties in construction and multifaceted areas.
防火安全、高机械强度环氧树脂（EP）因其在建筑等领域的重要应用而成为热门话题。本文采用简单的化学改性策略合成了具有对称结构的双-2-氨基苯并咪唑改性苯基膦酸盐（PP-BMI），并对其精细结构和组成进行了深入研究。由于 PP-BMI 在气相和凝聚相中的多重功能，含有 5 wt% PP-BMI 的 EP 复合材料达到了 UL-94 V-0 级，LOI 高达 34.3%。EP/5PP-BMI 的峰值热释放率 (PHRR)、总热释放率 (THR) 和峰值 CO 生成量 (P-COP) 与原始 EP 相比分别显著降低了 57%、52% 和 46%，进一步验证了 EP/5PP-BMI 卓越的防火安全性。PP-BMI 对 EP 的阻燃效果可归因于稀释非燃烧气体、捕获自由基和催化炭化功能。更重要的是，PP-BMI 能进一步提高 EP 的机械性能，这与 PP-BMI 和 EP 基体之间的相互作用密切相关。此外，EP/PP-BMI 复合材料还具有良好的耐酸碱性，确保了其持久的阻燃性和机械性能。这项工作为在建筑和多元领域实现具有高防火安全性和优异机械性能的环氧复合材料提供了一种新策略。
{"title":"Fire safety and high mechanical strength epoxy resin enabled by a bis-benzimidazole-primed phenyl phosphonic acid","authors":"Chenyu Zhou, Zhenfeng Zhong, Huaizhi Yang, Yan Zhang, Zhiquan Pan, Hong Zhou","doi":"10.1016/j.cej.2024.157773","DOIUrl":"https://doi.org/10.1016/j.cej.2024.157773","url":null,"abstract":"Preparation of fire safety and high mechanical strength epoxy resin (EP) has become a hot topic for its valuable applications in construction and other fields. Here, bis-2-aminobenzimidazole-modified phenyl phosphonates (PP-BMI) with symmetric structures were synthesized by a simple chemical modification strategy, and its fine structure and composition have been thoroughly characterized. Due to the multifaceted functions of PP-BMI in both gaseous and condensed phases, EP composite with 5 wt% PP-BMI reached a UL-94 V-0 rating and high LOI of 34.3 %. The excellent fire safety of EP/5PP-BMI was further verified with a significant reduction of 57 %, 52 % and 46 % in peak heat release rate (PHRR), total heat release (THR) and peak CO production (P-COP), respectively, compared to the original EP. The flame retardancy of PP-BMI on EP can be attributed to the dilution of non-combustion gases, free radical trapping and catalytic charring functions. More importantly, PP-BMI can further enhance the mechanical properties of EP, which is closely related to the interaction between PP-BMI and EP matrix. Furthermore, EP/PP-BMI composites have good resistance to acids and alkalis, ensuring long-lasting flame retardancy and mechanical properties. This work provides a new strategy for realizing epoxy composites with high fire safety and excellent mechanical properties in construction and multifaceted areas.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"121 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142673779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The rapid advance and growth of the point-of-care diagnosis industry has provided an impetus for the development of novel signal labels for highly sensitive bio-molecule detections. Colloidal quantum dots (QDs) exhibit superior brightness, facile surface functionalization and exceptional photostability, making them the preferred option for these biological applications. However, the significantly reduced fluorescence intensity and limited photochemical stability in complex biological environments have greatly hampered their further use. Herein, with an innovative alloying engineering strategy, the high-quality water-soluble CdSe/CdxZn1−xS QDs with near-unity PL quantum yield and monoexponential PL decay dynamics are obtained. Notably, for the first time, a record-breaking stability at the single QD level in water with nonblinking behavior persisting for an hour is achieved, which approaching those of state-of-the-art hydrophobic QDs. Furthermore, the nanocomposites formulated with these novel alloyed QDs demonstrate a remarkable PL QY of 96 % and provide an ultrasensitive detection for prostate specific antigen on lateral flow immunoassays. These findings presented here shed new light on the design of high-brightness water-soluble QDs in single-molecule level and QDs-based nanocomposites, significantly pushing ahead toward high-sensitivity biomedical detections and diagnosis.
{"title":"Alloyed geometric structure strategy enables high-quality water-soluble quantum dots for ultrasensitive fluorescence immunoassay","authors":"Wen Ou, Kaijie Zhu, Xingchang Lu, Dongliang Hu, Zheng Wang, Yang Li, Peixian Li, Zhe Liu, Wenxin Zhou, Xiaoqi Hou, Xuanyong Liu","doi":"10.1016/j.cej.2024.157799","DOIUrl":"https://doi.org/10.1016/j.cej.2024.157799","url":null,"abstract":"The rapid advance and growth of the point-of-care diagnosis industry has provided an impetus for the development of novel signal labels for highly sensitive bio-molecule detections. Colloidal quantum dots (QDs) exhibit superior brightness, facile surface functionalization and exceptional photostability, making them the preferred option for these biological applications. However, the significantly reduced fluorescence intensity and limited photochemical stability in complex biological environments have greatly hampered their further use. Herein, with an innovative alloying engineering strategy, the high-quality water-soluble CdSe/Cd<sub>x</sub>Zn<sub>1−x</sub>S QDs with near-unity PL quantum yield and monoexponential PL decay dynamics are obtained. Notably, for the first time, a record-breaking stability at the single QD level in water with nonblinking behavior persisting for an hour is achieved, which approaching those of state-of-the-art hydrophobic QDs. Furthermore, the nanocomposites formulated with these novel alloyed QDs demonstrate a remarkable PL QY of 96 % and provide an ultrasensitive detection for prostate specific antigen on lateral flow immunoassays. These findings presented here shed new light on the design of high-brightness water-soluble QDs in single-molecule level and QDs-based nanocomposites, significantly pushing ahead toward high-sensitivity biomedical detections and diagnosis.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"80 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142671086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Polyethylene terephthalate (PET) is the most abundant plastic waste in the environment. Currently, a new biocatalyst PETase, was discovered in 2016 from Ideonella sakaiensis bacteria, owned the high ability to digest PET through a mild and sustainable process. However, the high-level production of PETase in the model Escherichia coli remains a challenge and limits its application. Therefore, we employ the native molecular chaperones from Ideonella sakaiensis to improve the quality and quantity of an outstanding PETase variant, FAST-PETase (FA) at the first time. We selected GroELS from E. coli (EcG) and I. sakaiensis (IsG) using three genetic designs while the co-expressing FA with IsG chaperone increased soluble FA and elevated its activity by 25%. On the other hand, through the genome mining of I. sakaiensis, we identified a lipase secretion chaperone (IsLsC) at the upstream of native PETase. When co-expressing IsLsC and FA, the degradation efficiency toward PET film was up to 51.7 % within one day at 50 °C. More LsC like chaperones can be explored from the sequence similarity network (SSN) with corresponding function to IsLsC. Finally, molecular docking and dynamic simulation exploited a hydrogen bond formation between FA and IsLsC to stabilizing the structure. The discovery of a novel chaperone offers a promising strategy for attractive PETase engaging in PET waste valorization.
聚对苯二甲酸乙二醇酯（PET）是环境中含量最高的塑料废弃物。目前，2016年从Ideonella sakaiensis细菌中发现了一种新型生物催化剂PET酶，它拥有通过温和、可持续的过程消化PET的高能力。然而，在大肠杆菌模型中高水平生产 PET 酶仍是一项挑战，限制了其应用。因此，我们首次利用堺伊甸菌（Ideonella sakaiensis）的原生分子伴侣来提高优秀 PET 酶变体 FAST-PETase（FA）的质量和数量。我们通过三种基因设计从大肠杆菌（EcG）和堺伊藤菌（IsG）中选择了GroELS，而将FA与IsG伴侣蛋白共表达可增加FA的可溶性，并使其活性提高25%。另一方面，通过对 I. sakaiensis 的基因组挖掘，我们在原生 PET 酶的上游发现了一种脂肪酶分泌伴侣蛋白（IsLsC）。当 IsLsC 和 FA 共表达时，在 50 °C 下一天内对 PET 薄膜的降解效率高达 51.7%。从序列相似性网络（SSN）中可以发现更多与 IsLsC 具有相应功能的 LsC 类似伴侣。最后，分子对接和动态模拟利用了 FA 与 IsLsC 之间形成的氢键来稳定结构。新型伴侣蛋白的发现为有吸引力的 PET 酶参与 PET 废弃物价值化提供了一种前景广阔的策略。
{"title":"Exploit and elucidate chaperone assisted PET hydrolase for upcycling plastics","authors":"Wan-Wen Ting, Jie-Yao Yu, Chuan-Chieh Hsiang, Shih-I Tan, Chang-Chun Chang, Hsiang-Ling Huang, Chi-Hua Yu, Ruei-En Hu, Hsing-Ning Ma, I-Son Ng","doi":"10.1016/j.cej.2024.157777","DOIUrl":"https://doi.org/10.1016/j.cej.2024.157777","url":null,"abstract":"Polyethylene terephthalate (PET) is the most abundant plastic waste in the environment. Currently, a new biocatalyst PETase, was discovered in 2016 from <em>Ideonella sakaiensis</em> bacteria, owned the high ability to digest PET through a mild and sustainable process. However, the high-level production of PETase in the model <em>Escherichia coli</em> remains a challenge and limits its application. Therefore, we employ the native molecular chaperones from <em>Ideonella sakaiensis</em> to improve the quality and quantity of an outstanding PETase variant, FAST-PETase (FA) at the first time. We selected GroELS from <em>E. coli</em> (EcG) and <em>I. sakaiensis</em> (IsG) using three genetic designs while the co-expressing FA with IsG chaperone increased soluble FA and elevated its activity by 25%. On the other hand, through the genome mining of <em>I. sakaiensis</em>, we identified a lipase secretion chaperone (IsLsC) at the upstream of native PETase. When co-expressing IsLsC and FA, the degradation efficiency toward PET film was up to 51.7 % within one day at 50 °C. More LsC like chaperones can be explored from the sequence similarity network (SSN) with corresponding function to IsLsC. Finally, molecular docking and dynamic simulation exploited a hydrogen bond formation between FA and IsLsC to stabilizing the structure. The discovery of a novel chaperone offers a promising strategy for attractive PETase engaging in PET waste valorization.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"10 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142673741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ionic thermoelectric (i-TE) hydrogels have a high thermal energy utilization rate for low-grade heat, presenting a renewable energy supply option for sustainable global development. Conventional i-TE materials need to be conductive, stable and environmentally friendly, which remains a challenge today. This study presents a highly temperature-sensitive i-TE hydrogel with negative Seebeck coefficient, self-healing properties and conductive for photothermoelectric (PTE) conversion and non-contact sensing. The prepared PSFC-0.5 hydrogel exhibits a negative Seebeck coefficient and features a dual-crosslinked structure of polyacrylamide (PAM) and sodium alginate (SA), which provides the hydrogel with good mechanical strength (>2.7 kPa) and tensile properties (>1300 %). Photothermal (PT) conversion properties is effectively enhanced by combining carbon black/multi-walled carbon nanotubes (CB/MWCNTs) PT materials, and the addition of FeCl3 provides anions and cations for ionic diffusion. Under a 5 K temperature gradient, the optimized Seebeck coefficient was measured to be −2.01 mV·K−1 and the conductivity was approximately 1.70 mS·cm−1. Moreover, reversible hydrogen bonding interactions provides ionic hydrogels with good mechanical strength and self-healing capabilities. Due to the high sensitivity of PSFC-0.5 hydrogel to temperature, it can be effectively utilized in the field of non-contact sensing for the precise detection of temperature signals. This study presents an effective method for fabricating hydrogels that exhibit exceptional toughness and electric properties, demonstrating its significant potential for applications in PTE conversion and non-contact sensing technologies.
{"title":"Conductive ionic thermoelectric hydrogel with negative Seebeck coefficient, self-healing and highly sensitive to temperature for photothermoelectric conversion and non-contact sensing device","authors":"Wenqi Sha, Yuqin Wang, Ming Xiao, Yingjun Fang, Pengyu zhu, Zhilei Wang, Siliang Wang, Wei Zeng, Jinling Zhao, Limin Ruan","doi":"10.1016/j.cej.2024.157823","DOIUrl":"https://doi.org/10.1016/j.cej.2024.157823","url":null,"abstract":"Ionic thermoelectric (i-TE) hydrogels have a high thermal energy utilization rate for low-grade heat, presenting a renewable energy supply option for sustainable global development. Conventional i-TE materials need to be conductive, stable and environmentally friendly, which remains a challenge today. This study presents a highly temperature-sensitive i-TE hydrogel with negative Seebeck coefficient, self-healing properties and conductive for photothermoelectric (PTE) conversion and non-contact sensing. The prepared PSFC-0.5 hydrogel exhibits a negative Seebeck coefficient and features a dual-crosslinked structure of polyacrylamide (PAM) and sodium alginate (SA), which provides the hydrogel with good mechanical strength (>2.7 kPa) and tensile properties (>1300 %). Photothermal (PT) conversion properties is effectively enhanced by combining carbon black/multi-walled carbon nanotubes (CB/MWCNTs) PT materials, and the addition of FeCl<sub>3</sub> provides anions and cations for ionic diffusion. Under a 5 K temperature gradient, the optimized Seebeck coefficient was measured to be −2.01 mV·K<sup>−1</sup> and the conductivity was approximately 1.70 mS·cm<sup>−1</sup>. Moreover, reversible hydrogen bonding interactions provides ionic hydrogels with good mechanical strength and self-healing capabilities. Due to the high sensitivity of PSFC-0.5 hydrogel to temperature, it can be effectively utilized in the field of non-contact sensing for the precise detection of temperature signals. This study presents an effective method for fabricating hydrogels that exhibit exceptional toughness and electric properties, demonstrating its significant potential for applications in PTE conversion and non-contact sensing technologies.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"64 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142673743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-19DOI: 10.1016/j.cej.2024.157792
Belay Getahun Tegegne, Anteneh Wodaje Bayeh, Daniel Manaye Kabtamu, Aknachew Mebreku Demeku, Chen-Hao Wang
Redox flow batteries (RFBs) have attracted researchers due to their decoupled nature of energy and power modulations, suitability for large-scale stationary energy storage, and integration of renewable intermittent energy sources such as solar and wind power. Water’s narrow electrochemical stability window limits the energy density of aqueous redox flow batteries. Thus, a shift to non-aqueous organic redox flow batteries (NAORFBs) is necessary to achieve high energy density while benefiting from organic solvents’ expansive electrochemical stability windows. Nonetheless, the degradation and crossover of organic electroactive materials cause rapid capacity loss in NAORFBs. To improve the cycling stability of NAORFBs, molecular engineering is required to enhance the stability of redox-active species, particularly charged species, and the solubility of redox-active species. An appropriate ion-selective membrane that mitigates crossover by selectively allowing the passage of ions of supporting salts needs to be developed. This review discusses molecular design strategies that may improve radical ion stability, increase the solubility of redox-active species, and reduce redox-active species crossover and the selection of appropriate supporting electrolytes and separators/membranes for the overall enhancement of the cycle life and performance.
{"title":"Molecular engineering, supporting electrolyte, and membrane selections for enhanced cycling stability of non-aqueous organic redox flow batteries: A review","authors":"Belay Getahun Tegegne, Anteneh Wodaje Bayeh, Daniel Manaye Kabtamu, Aknachew Mebreku Demeku, Chen-Hao Wang","doi":"10.1016/j.cej.2024.157792","DOIUrl":"https://doi.org/10.1016/j.cej.2024.157792","url":null,"abstract":"Redox flow batteries (RFBs) have attracted researchers due to their decoupled nature of energy and power modulations, suitability for large-scale stationary energy storage, and integration of renewable intermittent energy sources such as solar and wind power. Water’s narrow electrochemical stability window limits the energy density of aqueous redox flow batteries. Thus, a shift to non-aqueous organic redox flow batteries (NAORFBs) is necessary to achieve high energy density while benefiting from organic solvents’ expansive electrochemical stability windows. Nonetheless, the degradation and crossover of organic electroactive materials cause rapid capacity loss in NAORFBs. To improve the cycling stability of NAORFBs, molecular engineering is required to enhance the stability of redox-active species, particularly charged species, and the solubility of redox-active species. An appropriate ion-selective membrane that mitigates crossover by selectively allowing the passage of ions of supporting salts needs to be developed. This review discusses molecular design strategies that may improve radical ion stability, increase the solubility of redox-active species, and reduce redox-active species crossover and the selection of appropriate supporting electrolytes and separators/membranes for the overall enhancement of the cycle life and performance.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"10 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142673749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ulcerative colitis (UC), a prevalent form of inflammatory bowel disease (IBD), is characterized by the presence of chronic, nonspecific, and recurring inflammation in the intestine. Current therapies are insufficient in addressing the effective modulation of the intestinal oxidative stress-inflammation cycle, the repair of the intestinal mechanical barrier, and the regulation of gut microbiota and metabolites. There is a need for a comprehensive approach to orchestrate intestinal homeostasis more effectively. For this purpose, biocompatible antioxidant carbon dots nanozymes (GH-CDs) were synthesized based on glucose and D-histidine using a microwave-assisted method for the systematic management of intestinal inflammation. It was demonstrated that GH-CDs possessed excellent reactive oxygen/nitrogen species (ROS/RNS) scavenging capacities, thus modulating oxidative stress-induced damage and mitigating inflammation by inhibiting the TNF, MAPK, PI3K-Akt, NF-κB, and JAK-STAT signaling pathways. For in vivo experiments, GH-CDs have demonstrated both protective and therapeutic effects in mitigating colitis by reducing ROS levels, decreasing the infiltration of M1-type macrophages, suppressing the release of pro-inflammatory cytokines, and repairing intestinal mechanical and chemical barriers. Importantly, GH-CDs also influenced the gut microbiome to achieve a more beneficial state, which was accomplished by enhancing bacterial diversity and altering the microbial composition towards an anti-inflammatory type. Additionally, GH-CDs supported the biosynthesis of secondary bile acids and isoflavonoids. In conclusion, with excellent biocompatibility, GH-CDs will be a promising strategy for UC by comprehensively orchestrating intestinal homeostasis.
{"title":"Biocompatible carbon dots nanozymes as ROS/RNS modulators for ulcerative colitis alleviation by comprehensively orchestrating intestinal homeostasis","authors":"Wenjing Wang, Guangrong Lu, Zhichao Deng, Huanyu Li, Wenfang He, Shouxing Yang, Yuanyuan Zhu, Chenxi Xu, Yujie Zhang, Lanqi Wang, Xiaoling Huang, Mingzhen Zhang, Changlong Xu","doi":"10.1016/j.cej.2024.157800","DOIUrl":"https://doi.org/10.1016/j.cej.2024.157800","url":null,"abstract":"Ulcerative colitis (UC), a prevalent form of inflammatory bowel disease (IBD), is characterized by the presence of chronic, nonspecific, and recurring inflammation in the intestine. Current therapies are insufficient in addressing the effective modulation of the intestinal oxidative stress-inflammation cycle, the repair of the intestinal mechanical barrier, and the regulation of gut microbiota and metabolites. There is a need for a comprehensive approach to orchestrate intestinal homeostasis more effectively. For this purpose, biocompatible antioxidant carbon dots nanozymes (GH-CDs) were synthesized based on glucose and D-histidine using a microwave-assisted method for the systematic management of intestinal inflammation. It was demonstrated that GH-CDs possessed excellent reactive oxygen/nitrogen species (ROS/RNS) scavenging capacities, thus modulating oxidative stress-induced damage and mitigating inflammation by inhibiting the TNF, MAPK, PI3K-Akt, NF-κB, and JAK-STAT signaling pathways. For <em>in vivo</em> experiments, GH-CDs have demonstrated both protective and therapeutic effects in mitigating colitis by reducing ROS levels, decreasing the infiltration of M1-type macrophages, suppressing the release of pro-inflammatory cytokines, and repairing intestinal mechanical and chemical barriers. Importantly, GH-CDs also influenced the gut microbiome to achieve a more beneficial state, which was accomplished by enhancing bacterial diversity and altering the microbial composition towards an anti-inflammatory type. Additionally, GH-CDs supported the biosynthesis of secondary bile acids and isoflavonoids. In conclusion, with excellent biocompatibility, GH-CDs will be a promising strategy for UC by comprehensively orchestrating intestinal homeostasis.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"46 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142670752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-19DOI: 10.1016/j.cej.2024.157775
T.E. Somesh, Manoj Bollu, Senthilmurugan Balamurugan, Duy Thanh Tran, Nam Hoon Kim, Joong Hee Lee
Rational design of a unique hybrid derived from transition-metal oxides, known to possess high capacity but poor electronic conductivity, with two-dimensional (2D) MXenes, known to possess metallic conductivity but with limited capacity and instability in aqueous electrolytes, is expected to produce innovative electrode materials for supercapacitor. In this study, we fabricated a free-standing triphasic hybrid composite film of NiFe2O4 pillared Ti3C2Tx encapsulated with polypyrrole (MNFx@PPy). This composite combined merits from large redox capacity of NiFe2O4 and high conductivity of Ti3C2Tx to operate within a voltage window of 1.2 V in 2.0 M H2SO4 electrolyte. The MNF10@PPy electrode had a specific capacity of 706.6 mAh·g−1 at 1.0 A·g−1, with 81.13 % retention at a high current density of 20 A·g−1. The integration of PPy enhanced interfacial contact of the components which leads to upsurge in electrochemical performance and stability of the tri-component system. When the fabricated asymmetric flexible supercapacitor (MXene@PPy//MNF10@PPy) was assessed with broad 1.6 V, a complimentary potential window of both electrodes, the device offered 37.49 Wh·kg−1 energy density at a power density of 3879 W·kg−1. This study underscores the synergetic potential of MNF10@PPy hybrids to improve energy storage pseudocapacitive electrodes for flexible devices.
{"title":"Polypyrrole employed interfacial engineering of porous NiFe2O4/Ti3C2Tx hybridized triphasic freestanding films for high-performance flexible pseudocapacitors","authors":"T.E. Somesh, Manoj Bollu, Senthilmurugan Balamurugan, Duy Thanh Tran, Nam Hoon Kim, Joong Hee Lee","doi":"10.1016/j.cej.2024.157775","DOIUrl":"https://doi.org/10.1016/j.cej.2024.157775","url":null,"abstract":"Rational design of a unique hybrid derived from transition-metal oxides, known to possess high capacity but poor electronic conductivity, with two-dimensional (2D) MXenes, known to possess metallic conductivity but with limited capacity and instability in aqueous electrolytes, is expected to produce innovative electrode materials for supercapacitor. In this study, we fabricated a free-standing triphasic hybrid composite film of NiFe<sub>2</sub>O<sub>4</sub> pillared Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> encapsulated with polypyrrole (MNFx@PPy). This composite combined merits from large redox capacity of NiFe<sub>2</sub>O<sub>4</sub> and high conductivity of Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> to operate within a voltage window of 1.2 V in 2.0 M H<sub>2</sub>SO<sub>4</sub> electrolyte. The MNF10@PPy electrode had a specific capacity of 706.6 mAh·g<sup>−1</sup> at 1.0 A·g<sup>−1</sup>, with 81.13 % retention at a high current density of 20 A·g<sup>−1</sup>. The integration of PPy enhanced interfacial contact of the components which leads to upsurge in electrochemical performance and stability of the tri-component system. When the fabricated asymmetric flexible supercapacitor (MXene@PPy//MNF10@PPy) was assessed with broad 1.6 V, a complimentary potential window of both electrodes, the device offered 37.49 Wh·kg<sup>−1</sup> energy density at a power density of 3879 W·kg<sup>−1</sup>. This study underscores the synergetic potential of MNF10@PPy hybrids to improve energy storage pseudocapacitive electrodes for flexible devices.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"7 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142670754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Plastic pollution, the energy crisis, and climate change are significant global challenges that threaten human sustainability and social development. Additionally, addressing pollution while simultaneously promoting valorization techniques for the development of effective personal protective equipment to mitigate the transmission of the SARS-CoV-2 virus poses a challenge, particularly in maintaining wearer comfort. Current advancements in intelligent future therapies focus on the incorporation of quantum nanostructures with theranostic capabilities that are compatible with the skin, reduce wear interference, and facilitate easy integration into minimally invasive surgical procedures. To address these challenges, we propose a win–win strategy that enables microplasma technology and high-throughput electrospinning technology to prepare sustainable self-powered angiogenesis inspired ultrafine nanofibers (AINFs). The proposed quantum nanostructure-anchored AINFs are designed to support the development of flex-insensitive white light-emitting optoelectronics (92 % at 500 cycles), COVID-19 face masks of record high-quality factors (0.167 Pa−1 @ PM0.2), and highly compatible large-scale self-powered theranostic capabilities (2694 pmV−1). These innovations align with the urgent demands of a circular economy and foster environmentally sustainable applications within the Internet of Medical Things.
{"title":"Bio-inspired sustainable electrospun quantum nanostructures for high quality factor enabled face masks and self-powered intelligent theranostics","authors":"Loganathan Veeramuthu, Ren-Jie Weng, Wei-Hung Chiang, Archana Pandiyan, Fu-Jie Liu, Fang-Cheng Liang, G.Ranjith Kumar, Hua-Yi Hsu, Yu-Ci Chen, Wen-Yinn Lin, Yao-Chun Tang, Wan-Rong Lin, Ren-Jei Chung, Tao Zhou, Chi-Ching Kuo","doi":"10.1016/j.cej.2024.157752","DOIUrl":"https://doi.org/10.1016/j.cej.2024.157752","url":null,"abstract":"Plastic pollution, the energy crisis, and climate change are significant global challenges that threaten human sustainability and social development. Additionally, addressing pollution while simultaneously promoting valorization techniques for the development of effective personal protective equipment to mitigate the transmission of the SARS-CoV-2 virus poses a challenge, particularly in maintaining wearer comfort. Current advancements in intelligent future therapies focus on the incorporation of quantum nanostructures with theranostic capabilities that are compatible with the skin, reduce wear interference, and facilitate easy integration into minimally invasive surgical procedures. To address these challenges, we propose a win–win strategy that enables microplasma technology and high-throughput electrospinning technology to prepare sustainable self-powered angiogenesis inspired ultrafine nanofibers (AINFs). The proposed quantum nanostructure-anchored AINFs are designed to support the development of flex-insensitive white light-emitting optoelectronics (92 % at 500 cycles), COVID-19 face masks of record high-quality factors (0.167 Pa<sup>−1</sup> @ PM<sub>0.2</sub>), and highly compatible large-scale self-powered theranostic capabilities (2694 pmV<sup>−1</sup>). These innovations align with the urgent demands of a circular economy and foster environmentally sustainable applications within the Internet of Medical Things.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"63 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142671087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In aerospace, automobile transportation, disaster warning and other fields, triboelectric nanogenerators (TENGs) are a new type of energy harvesting device that converts mechanical energy into electrical energy. It is especially suitable for monitoring and early warning systems in harsh environments. This paper reported a TENG based on composites reinforced polyphenylene sulfide (PPS) by the metal–organic frameworks (MOFs) are constructed on the surface of short carbon fibers (SCF). The friction properties of the composites were investigated by using two different friction methods. The composites demonstrated excellent wear resistance, with reduced wear rates to 8.16 × 10-7 mm3/Nm and 2.512 × 10-7 mm3/Nm, respectively. Additionally, it exhibited outstanding high-temperature stability (445.9 °C). Therefore, the study highlights the potential of TENGs to serve as a sustainable solution for real-time environmental monitoring, paving the way for the development of robust and energy-efficient systems in harsh environment applications
{"title":"Wear-resistance triboelectric nanogenerator based on metal-organic framework modified short carbon fiber reinforced polyphenylene sulfide","authors":"Ke Xu, Baicheng Zhang, Shengxin Guan, Zhaoge Huang, Xianqiang Pei, Qingbao Guan","doi":"10.1016/j.cej.2024.157781","DOIUrl":"https://doi.org/10.1016/j.cej.2024.157781","url":null,"abstract":"In aerospace, automobile transportation, disaster warning and other fields, triboelectric nanogenerators (TENGs) are a new type of energy harvesting device that converts mechanical energy into electrical energy. It is especially suitable for monitoring and early warning systems in harsh environments. This paper reported a TENG based on composites reinforced polyphenylene sulfide (PPS) by the metal–organic frameworks (MOFs) are constructed on the surface of short carbon fibers (SCF). The friction properties of the composites were investigated by using two different friction methods. The composites demonstrated excellent wear resistance, with reduced wear rates to 8.16 × 10<sup>-7</sup> mm<sup>3</sup>/Nm and 2.512 × 10<sup>-7</sup> mm<sup>3</sup>/Nm, respectively. Additionally, it exhibited outstanding high-temperature stability (445.9 °C). Therefore, the study highlights the potential of TENGs to serve as a sustainable solution for real-time environmental monitoring, paving the way for the development of robust and energy-efficient systems in harsh environment applications","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"251 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142673573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-19DOI: 10.1016/j.cej.2024.157760
Haifeng Ji, Peihuan Lv, Liming Zhang, Lanyue Shen, Zhenqiu Gao, Zhen Wen, Xuhui Sun
Tactile sensors with multifunctional sensing characteristics enhance people’s perception of external stimuli and have become an indispensable part of human–computer interaction. However, constructing a multi-functional tactile sensor that is able to respond to multiple stimuli without signal crosstalk still remains challenging. Here, we proposed a temperature–pressure integrated multi-functional tactile sensor (TP-MTS) by coupling thermoresistive and contact-electrification effects, which can simultaneously detect human body temperature and physiological motion. A sensing electrode model was validated by using a PVDF/PEG/Gr (polyvinylidene difluoride/Polyethylene terephthalate/graphene) composite thermoresistive film instead of the traditional metal as the electrode of the pressure sensing unit. The multi-functional tactile sensor converts temperature and pressure stimuli into two independent output signals from different paths, realizing simultaneous detection of temperature and pressure without signal crosstalk. The TP-MTS can achieve real-time temperature monitoring with a minimum resolution of 0.1℃ and a sensitivity of 1.51 % ℃-1 and it could also detect pressure in a wide pressure range (0.25 kPa ∼ 253.87 kPa) with the sensitivity of 3.73 kPa−1. Through the structure design and the huge impedance difference between the thermosensitive film and the triboelectric unit, the real-time monitoring of temperature and pulse is realized simultaneously in a single device without crosstalk.
{"title":"A no-crosstalk multi-functional tactile sensor for precise physiological monitoring","authors":"Haifeng Ji, Peihuan Lv, Liming Zhang, Lanyue Shen, Zhenqiu Gao, Zhen Wen, Xuhui Sun","doi":"10.1016/j.cej.2024.157760","DOIUrl":"https://doi.org/10.1016/j.cej.2024.157760","url":null,"abstract":"Tactile sensors with multifunctional sensing characteristics enhance people’s perception of external stimuli and have become an indispensable part of human–computer interaction. However, constructing a multi-functional tactile sensor that is able to respond to multiple stimuli without signal crosstalk still remains challenging. Here, we proposed a temperature–pressure integrated multi-functional tactile sensor (TP-MTS) by coupling thermoresistive and contact-electrification effects, which can simultaneously detect human body temperature and physiological motion. A sensing electrode model was validated by using a PVDF/PEG/Gr (polyvinylidene difluoride/Polyethylene terephthalate/graphene) composite thermoresistive film instead of the traditional metal as the electrode of the pressure sensing unit. The multi-functional tactile sensor converts temperature and pressure stimuli into two independent output signals from different paths, realizing simultaneous detection of temperature and pressure without signal crosstalk. The TP-MTS can achieve real-time temperature monitoring with a minimum resolution of 0.1℃ and a sensitivity of 1.51 % ℃<sup>-1</sup> and it could also detect pressure in a wide pressure range (0.25 kPa ∼ 253.87 kPa) with the sensitivity of 3.73 kPa<sup>−1</sup>. Through the structure design and the huge impedance difference between the thermosensitive film and the triboelectric unit, the real-time monitoring of temperature and pulse is realized simultaneously in a single device without crosstalk.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"99 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142670747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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