Polymers最新文献_第5页

Processing and Characterization of Unidirectional Flax Fiber-Reinforced Bio-Based Polyamide 11 Biocomposites.

IF 4.7 3区工程技术

Polymers Pub Date : 2025-02-28 DOI: 10.3390/polym17050666

Patrick Hirsch, Benjamin Tillner, André Henkel, Nico Teuscher, Ivonne Jahn, Maik Feldmann

{"title":"Processing and Characterization of Unidirectional Flax Fiber-Reinforced Bio-Based Polyamide 11 Biocomposites.","authors":"Patrick Hirsch, Benjamin Tillner, André Henkel, Nico Teuscher, Ivonne Jahn, Maik Feldmann","doi":"10.3390/polym17050666","DOIUrl":"10.3390/polym17050666","url":null,"abstract":"Within this study, the impregnation behavior and resulting mechanical properties of unidirectional flax fiber-reinforced polyamide 11 biocomposites were investigated. Therefore, different grades of bio-based polyamide 11 have been evaluated regarding their eligibility as composite matrix material. The production of the unidirectional flax fiber-reinforced biocomposites was investigated using a continuous film-stacking method. It was found that the flow behavior of the polyamide 11 matrix polymer significantly affected the impregnation quality and the resulting mechanical properties as tested by tensile and bending tests. A lower shear viscosity and stronger shear thinning behavior led to better impregnation, a 15% higher stiffness, and 18% higher strength. This was also analyzed with morphological analysis by scanning electron microscopy. Additionally, the effect of the fiber volume content of the flax fibers on the mechanical properties was tested, showing a positive correlation between the fiber content and the resulting stiffness and strength, leading to an increase of 48% and 55%, respectively. In result, a maximum Young's modulus of 16.9 GPa and tensile strength of 175 MPa at a fiber volume content of 33% was achieved. Thus, the unidirectional flax fiber-reinforced polyamide 11 biocomposites investigated can be a sustainable construction material for lightweight applications, e.g., in the automotive industry.","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 5","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11902405/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143616976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Removal and Recovery of AgNPs from Water by Sustainable Magnetic Nanoflocculants.

IF 4.7 3区工程技术

Polymers Pub Date : 2025-02-28 DOI: 10.3390/polym17050650

Mariana Ramirez, Eya Ben Khalifa, Giuliana Magnacca, Mario Sergio Moreno, María E Parolo, Luciano Carlos

{"title":"Removal and Recovery of AgNPs from Water by Sustainable Magnetic Nanoflocculants.","authors":"Mariana Ramirez, Eya Ben Khalifa, Giuliana Magnacca, Mario Sergio Moreno, María E Parolo, Luciano Carlos","doi":"10.3390/polym17050650","DOIUrl":"10.3390/polym17050650","url":null,"abstract":"The presence of silver nanoparticles (AgNPs) in water bodies has emerged as a new environmental concern and the efficient separation of these nanoparticles remains a critical challenge. Here, we developed novel magnetic nanoflocculants for the recovery of AgNPs from water. Alternating layers of biopolymers, in particular, chitosan, alginate, and polymeric bio-based soluble substances (BBS) derived from urban waste, were coated on magnetic nanoparticles via the layer-by-layer technique to prepare reusable magnetic nanoflocculants (MNFs). The MNFs obtained were characterized with diverse physicochemical techniques. Surface response methodology, based on the Doehlert matrix, has shown to be a useful tool to determine the effect of pH (in the range 5-9), concentration of AgNPs (7-20 mg L-1), and MNFs (50-1000 mg L-1) on the performance of AgNPs removal. The model predicts a high AgNPs removal percentage at low pH values and high MNF concentration. In particular, for the most efficient MNFs, 90% of AgNPs removal was obtained at pH 5 and 600 mg L-1 MNF concentration. Additionally, the effects of AgNPs size, ionic strength, the presence of humic acids, and two types of surfactants (LAS anionic and TWEEN 20 nonionic) on the AgNPs removal were evaluated. Finally, recovery and reuse experiments showed that MNF made of Chitosan-BBS can be reused in ten cycles, losing only 30% of the initial removal capacity. Therefore, magnetic flocculation could represent a sustainable alternative for AgNPs separation with potential applications in water treatment and remediation of nanoparticle contamination.","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 5","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11902812/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143616614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Regulatory Frameworks and State-of-the-Art Decontamination Technologies for Recycled Polystyrene for Food Contact Applications.

IF 4.7 3区工程技术

Polymers Pub Date : 2025-02-28 DOI: 10.3390/polym17050658

Javiera Sepúlveda-Carter, José L Moreno de Castro, Laura Marín, Paula Baños, Marcos Sánchez Rodríguez, Marina P Arrieta

{"title":"Regulatory Frameworks and State-of-the-Art Decontamination Technologies for Recycled Polystyrene for Food Contact Applications.","authors":"Javiera Sepúlveda-Carter, José L Moreno de Castro, Laura Marín, Paula Baños, Marcos Sánchez Rodríguez, Marina P Arrieta","doi":"10.3390/polym17050658","DOIUrl":"10.3390/polym17050658","url":null,"abstract":"Recycling post-consumer plastics for food contact applications is crucial for the circular economy; however, it presents challenges due to potential contamination and regulatory requirements. This review outlines the current European and U.S. legislation governing recycled plastics in food contact materials (FCM). The European Food Safety Authority (EFSA) mandates the evaluation and authorization of recycling processes. This includes examining input/output flows, prioritizing the use of previously authorized FCM, and assessing decontamination efficiency through material-specific challenge tests. Additionally, it evaluates new installations intended to apply approved decontamination technologies. In contrast, the voluntary submission to the U.S. Food and Drug Administration (FDA) provides guidelines with general advice on methodologies and recommended parameters and challenge tests. Applications to the EFSA for non-PET materials, such as HDPE, PP, and PS, are reviewed, highlighting the challenges of each material. Recycled PS, with its lower diffusivity compared to polyolefins shows promise for food packaging, with potential as a next material approved for use in the European Union. Decontamination technologies for post-consumer PS are explored, including super-cleaning processes, solvent extraction, and industrial methods. The review emphasizes the need for multidisciplinary collaboration to address the uncertainties around potential contaminants and ensure the safety of recycled plastics for food contact applications.","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 5","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11902640/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143616654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

PLA Reinforced with Limestone Waste: A Way to Sustainable Polymer Composites.

IF 4.7 3区工程技术

Polymers Pub Date : 2025-02-28 DOI: 10.3390/polym17050662

Dora Sousa, Catarina Baleia, Pedro Amaral

{"title":"PLA Reinforced with Limestone Waste: A Way to Sustainable Polymer Composites.","authors":"Dora Sousa, Catarina Baleia, Pedro Amaral","doi":"10.3390/polym17050662","DOIUrl":"10.3390/polym17050662","url":null,"abstract":"Waste stone sludge generated by the extractive industry has traditionally posed significant disposal challenges. This study redefines stone sludge as a valuable raw material by incorporating it into polylactic acid (PLA) to create sustainable composite materials. Pellets and filaments composed of up to 50% by weight of limestone powder and PLA were successfully produced using melt blending in a twin-screw extruder. Scanning electron microscopy (SEM), X-ray fluorescence (XRF), and X-ray diffraction (XRD) analyses revealed a uniform distribution of stone particles within the PLA matrix and confirmed the chemical and structural compatibility of the components. Thermogravimetric analysis (TGA) showed that the composites retained thermal stability, while mechanical testing demonstrated significant enhancements in stiffness, with an increase in elastic modulus for composites containing 50% limestone powder. The melt flow rate (MFR) decreases with increasing filler content. The brittleness also increased, reducing impact resistance. Mechanical tests were performed on injected and 3D-printed specimens. The filament produced was successfully used in 3D printing, with a small XYZ calibration cube.","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 5","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11902394/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143616961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Study on the Dispersion and Processing Performance of Activated Aluminum Hydroxide/Ammonium Polyphosphate Composite Flame Retardant System for Vinyl Ester Resin.

IF 4.7 3区工程技术

Polymers Pub Date : 2025-02-28 DOI: 10.3390/polym17050667

Jipeng Dou, Yong Xie, Rui Chen, Yan Qin

{"title":"Study on the Dispersion and Processing Performance of Activated Aluminum Hydroxide/Ammonium Polyphosphate Composite Flame Retardant System for Vinyl Ester Resin.","authors":"Jipeng Dou, Yong Xie, Rui Chen, Yan Qin","doi":"10.3390/polym17050667","DOIUrl":"10.3390/polym17050667","url":null,"abstract":"Stearic acid was used to modify the surface of a mixed flame-retardant powder consisting of aluminum hydroxide and ammonium polyphosphate by an uneven nucleation method, aiming to improve its dispersion in a vinyl resin matrix. This study investigated the effect of stearic acid dosage on the powder's surface modification, characterized by infrared spectroscopy, activation degree, and laser particle size distribution. The dispersion of the modified powder in the resin matrix was evaluated by measuring the system viscosity, scanning electron microscopy (SEM) images, and bending performance. The results indicated that when the stearic acid content was 1%, the powder exhibited the best overall coating effect, with a uniform particle size distribution and an activation degree of 73.6%. After the composite material was added to the resin, the system viscosity was 923 mPa·s, and SEM images showed good dispersion of the powder in the resin matrix. The cured resin demonstrated a bending strength of 41.86 MPa. However, the flame retardancy slightly decreased, with the limiting oxygen index (LOI) dropping from 24.6% for the unmodified sample to 24.0%. When the stearic acid content exceeded 1%, the powder's particle size increased dramatically. Although the activation degree also increased, the improvement was not significant. The addition of the powder to the resin resulted in a higher system viscosity, and the flame retardancy deteriorated sharply, with the vertical burning rating dropping from FV-1 to FV-2. Considering flame retardancy, mechanical properties, and processing performance, the composite material with 1% stearic acid demonstrated the best overall performance.","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 5","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11902472/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143616979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Investigation of Constitutive Models for Pressure Monitoring of Viscoelastic-Hyperelastic Composite Structures.

IF 4.7 3区工程技术

Polymers Pub Date : 2025-02-28 DOI: 10.3390/polym17050647

Lijia Ai, Peng Li, Hongwei Yuan, Chunrong Tian, Xiaolian Qiang, Tao Fu

{"title":"Investigation of Constitutive Models for Pressure Monitoring of Viscoelastic-Hyperelastic Composite Structures.","authors":"Lijia Ai, Peng Li, Hongwei Yuan, Chunrong Tian, Xiaolian Qiang, Tao Fu","doi":"10.3390/polym17050647","DOIUrl":"10.3390/polym17050647","url":null,"abstract":"To ensure ammunition safety, a protective structure and pressure detection system are essential; however, there is a lack of an accurate constitutive model to describe the mechanical response characteristics of protective structures composed of various polymer materials. In this work, a constitutive model for the composite structure based on the superposition principle is successfully constructed derived from the quasi-static compression behavior of rigid polyurethane foam (RPUF), silicone rubber foam (SRF), and flexible pressure sensors (FPSs) through experimental investigations. The constitutive model accurately reflects the influence of each type of polymer foam on the mechanical performance of composite structures, underscoring the significance of thickness ratios. Test results within the temperature range of 25 °C to 55 °C validate the model's accuracy, with an average fitting error of 8.6%. Furthermore, a multi-channel pressure detection system has been integrated into the composite structure. Under conditions of out-of-plane loads ranging from 0 to 10 kilonewtons, the accuracy of the pressure monitoring system, adjusted using the constructed model, has improved by 16%. The constitutive model and the pressure sensing system effectively predict the mechanical properties of the protective structure and enable real-time force state monitoring, which is crucial for ammunition safety and has broader applications for safeguarding other objects.","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 5","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11902559/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143616918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Enhanced Lightweight Structures Through Brachistochrone-Inspired Lattice Design.

IF 4.7 3区工程技术

Polymers Pub Date : 2025-02-28 DOI: 10.3390/polym17050654

Parisa Majari, Daniel Olvera-Trejo, Jorge A Estrada-Díaz, Alex Elías-Zúñiga, Oscar Martinez-Romero, Claudia A Ramírez-Herrera, Imperio Anel Perales-Martínez

{"title":"Enhanced Lightweight Structures Through Brachistochrone-Inspired Lattice Design.","authors":"Parisa Majari, Daniel Olvera-Trejo, Jorge A Estrada-Díaz, Alex Elías-Zúñiga, Oscar Martinez-Romero, Claudia A Ramírez-Herrera, Imperio Anel Perales-Martínez","doi":"10.3390/polym17050654","DOIUrl":"10.3390/polym17050654","url":null,"abstract":"Lattice structures offer unique mechanical properties and versatility in engineering applications, yet existing designs often struggle to balance performance and material efficiency. This study introduces the brachistochrone curve as a novel framework for optimizing lattice geometries, enhancing mechanical behavior while minimizing material usage. Using finite element simulations and compressive testing of 3D-printed samples, we analyzed the mechanical response of brachistochrone-based (B-) and standard lattice structures (diamond, IWP, gyroid, and BCC). We investigated the scaling behavior of the volume-to-surface area ratio, incorporated fractal dimension analysis, and compared experimental and numerical results to evaluate the performance of B-lattices versus standard designs (S-). Our findings indicate that brachistochrone-inspired lattices enhance mechanical efficiency, enabling the design of lightweight, high-strength components with sustainable material use. Experimental results suggest that B-gyroid lattices exhibit lower stiffness than S-gyroid lattices under small displacements, highlighting their potential for energy absorption applications.","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 5","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11902810/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143616942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Citrus Wastes as Source of Pectin and Bioactive Compounds Extracted via One-Pot Microwave Process: An In Situ Path to Modulated Property Control.

IF 4.7 3区工程技术

Polymers Pub Date : 2025-02-28 DOI: 10.3390/polym17050659

Domenico Zannini, Martina Monteforte, Luca Gargiulo, Tiziana Marino, Giovanna Gomez d'Ayala, Gabriella Santagata, Giovanni Dal Poggetto

{"title":"Citrus Wastes as Source of Pectin and Bioactive Compounds Extracted via One-Pot Microwave Process: An In Situ Path to Modulated Property Control.","authors":"Domenico Zannini, Martina Monteforte, Luca Gargiulo, Tiziana Marino, Giovanna Gomez d'Ayala, Gabriella Santagata, Giovanni Dal Poggetto","doi":"10.3390/polym17050659","DOIUrl":"10.3390/polym17050659","url":null,"abstract":"In this paper, citrus pomace was used as a source of pectin and polyphenols extracted in one pot solution by microwave-assisted extraction (MAE) and conventional extraction (CE) methods. MAE parameters were optimized to maximize yield and adjust in situ final physicochemical properties of extracted pectins, such as the methylation degree (DM), significantly influencing pectin functionality and application. Citric acid (CA) and acetic acid (Hac) were employed as solvents to mitigate pectin degradation. Extracted pectins were structurally (GPC and FTIR-ATR), morphologically (SEM), and thermally (TGA) characterized. From the reaction batch, the bioactive compounds (AOs) were separated and recovered, and their yield and antioxidant activities were evaluated with a DPPH assay. Moreover, by strategically selecting pH and solvents, this research enabled precise control over the final properties of pectin. The various characterization techniques employed show that the extraction conditions significantly influence the physicochemical and morphological properties of the material. Molecular weight (Mw) values range from 218 kDa to 567 kDa, surface morphology varies from compact/aggregated structures to three-dimensional network-like formations, and the DM spans from 34% (low DM) to 83% (high DM). This highlights a novel approach for predicting and tailoring in situ characteristics of extracted pectin to meet specific application requirements.","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 5","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11902335/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143616867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Investigation of the Influence of Manufacturing on Filament Production and Its Impact on Additive Manufactured Structures.

IF 4.7 3区工程技术

Polymers Pub Date : 2025-02-28 DOI: 10.3390/polym17050651

Mohamed Refat, Robert Maertens, Patrick Weiss, Frank Henning, Volker Schulze, Wilfried V Liebig

{"title":"Investigation of the Influence of Manufacturing on Filament Production and Its Impact on Additive Manufactured Structures.","authors":"Mohamed Refat, Robert Maertens, Patrick Weiss, Frank Henning, Volker Schulze, Wilfried V Liebig","doi":"10.3390/polym17050651","DOIUrl":"10.3390/polym17050651","url":null,"abstract":"In this study, the effect of various parameters of a single screw extruder on the rheology and mechanical properties of a polylactic acid (PLA) filament with a 1.75 mm diameter was investigated. The barrel temperature, nozzle and cooling bath temperature, screw speed, nozzle diameter, water bath length, and distance to the nozzle were the process variables. A Taguchi experimental design was implemented using an L8 orthogonal matrix with seven factors and two levels, and their influence on roundness and diameter were evaluated. Among the various processing parameters, the temperature of the cooling bath affected the roundness the most. The mechanical properties and surface roughness of the PLA filament were examined using a tensile test and nanofocus optical system, respectively. Moreover, to assess the filament's reliability and investigate its behavior further, the filament was used to print 0° plates, and then dog-bone samples were cut from them to evaluate the mechanical properties of the printed specimens. Finally, the results indicate that improved-roundness filaments of 0.004 mm can lead to enhanced mechanical properties in 3D-printed samples with 3.54 MPa.","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 5","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11902861/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143616921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Nanofibrous Membrane-Based Stretchable Electrochemical Sweat Sensor for pH Detection.

IF 4.7 3区工程技术

Polymers Pub Date : 2025-02-28 DOI: 10.3390/polym17050663

Longzhou Zhang, Baoyuan Ma, Zhiguang Xu, Yan Zhao

{"title":"Nanofibrous Membrane-Based Stretchable Electrochemical Sweat Sensor for pH Detection.","authors":"Longzhou Zhang, Baoyuan Ma, Zhiguang Xu, Yan Zhao","doi":"10.3390/polym17050663","DOIUrl":"10.3390/polym17050663","url":null,"abstract":"Wearable, non-invasive sweat sensors capable of continuously monitoring the pH of sweat, which is a key indicator related to metabolism and homeostasis level, are highly desirable for personal health management. However, ensuring the stability and accuracy of these sensors can be challenging when the body is in motion. In this work, we prepared a stretchable nanofibrous membrane-based electrochemical pH-sensing electrode by embedding carbon nanotubes (MWCNT) and silver nanowires (AgNWs) into an elastic electrospun nanofibrous membrane, followed by polyaniline electrodeposition. The as-prepared pH-sensing electrode showed a high sensitivity of 82.53 mV/pH and high accuracy in ionic solutions with pH ranging from 3 to 7. Notably, the electrode maintained stable sensing performance under deformations, including torsion, bending, and tensile strains up to 30%. Even after 1000 cycles of stretching at a 30% tensile strain, the detection sensitivity remained above 70 mV/pH, indicating its potential application as a wearable electrochemical sensor for monitoring sweat pH in personal health management.","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 5","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11902454/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143616948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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