Polymer Testing最新文献_第8页

A cost-effective protocol for detecting fluorescent microplastics in arable soils to study redistribution processes 一种具有成本效益的检测可耕种土壤中荧光微塑料以研究再分配过程的方案

IF 5 2区材料科学

Polymer Testing Pub Date : 2025-04-26 DOI: 10.1016/j.polymertesting.2025.108824

Saunak Sinha Ray , David Zumr , Florian Wilken , Tomáš Dostál , Peter Fiener

{"title":"A cost-effective protocol for detecting fluorescent microplastics in arable soils to study redistribution processes","authors":"Saunak Sinha Ray , David Zumr , Florian Wilken , Tomáš Dostál , Peter Fiener","doi":"10.1016/j.polymertesting.2025.108824","DOIUrl":"10.1016/j.polymertesting.2025.108824","url":null,"abstract":"<div><div>Understanding microplastics' (MPs) transport from soils to aquatic ecosystems is challenging due to labor-intensive detection methods, especially in large-scale plot experiments analyzing surface runoff and soil erosion. To address this, we used fluorescent MPs as tracers and developed a cost-effective protocol to detect them in dry soils and eroded sediments. We analyzed spherical polyethylene (PE: 125–150 μm; 425–500 μm) and irregular polylactic acid (PLA: 125–150 μm; 250–300 μm). Sample assays were prepared primarily based on dry and wet sieving. Subsequent darkroom photography under 365 nm illumination, and thresholding and segmentation-based image analysis were done. The developed protocol demonstrates high reliability, precision, and F-scores of 88.7 % ± 2.9 %, 85.2 % ± 3.1 %, and 86.9 % ± 2.8 %. PE exhibited slightly higher recovery rates (85 % ± 5 %) than PLA (79 % ± 8 %). Particle size influenced recovery, with larger MPs achieving significantly higher recovery. Smaller particles showed slightly lower recovery under dry soil conditions, but their recovery improved under sediment conditions facilitated by wet sieving and ultrasonication. All fluorescent MPs retained >95 % detectability after three months of storage, highlighting marker temporal stability. Compared to existing methods, this protocol eliminates complex digestion steps, reduces costs, and ensures minimal contamination, providing a robust framework for MP transport studies. It offers potential for enhancement through advanced imaging and machine learning, enabling more efficient and accessible detection in environmental research.</div></div>","PeriodicalId":20628,"journal":{"name":"Polymer Testing","volume":"147 ","pages":"Article 108824"},"PeriodicalIF":5.0,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel tenter-frame device for real-time monitoring during biaxial stretching of polyethylene 一种用于聚乙烯双轴拉伸过程实时监测的新型张拉架装置

IF 5 2区材料科学

Polymer Testing Pub Date : 2025-04-25 DOI: 10.1016/j.polymertesting.2025.108823

Francesca Gentile , Adriano Guida , Ilaria Squillante , Finizia Auriemma , Giuseppe Portale , Roberto Pantani

{"title":"A novel tenter-frame device for real-time monitoring during biaxial stretching of polyethylene","authors":"Francesca Gentile , Adriano Guida , Ilaria Squillante , Finizia Auriemma , Giuseppe Portale , Roberto Pantani","doi":"10.1016/j.polymertesting.2025.108823","DOIUrl":"10.1016/j.polymertesting.2025.108823","url":null,"abstract":"<div><div>Biaxial stretching of polymeric films, which typically occurs in a semi-solid state, involves the application of shear and elongational force fields along two main directions and is a common technology in several applications. To understand the effect of the processing conditions on the final properties, it is crucial to monitor the development of the crystal structure and orientation throughout the stretching process. While there is considerable literature on the uniaxial processing of PE materials, only a small number of research studies have been conducted on biaxially oriented polyethylene (BOPE) film processing. Given the complex and costly nature of designing biaxial devices, several potential solutions exist within the literature. However, most of these do not meet the needs of in-situ investigations. The objective of this manuscript has been the development of a cost-effective device that enables in-situ analysis during biaxial stretching of polyethylene cast sheet samples. The potential of the so-designed device has been demonstrated by carrying out in-situ small X-ray scattering (SAXS) analysis during stretching tests at 125 °C on an LLDPE pre-cast sheet sample.</div></div>","PeriodicalId":20628,"journal":{"name":"Polymer Testing","volume":"147 ","pages":"Article 108823"},"PeriodicalIF":5.0,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143898683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental study on the anchoring mechanism and performance of BFRP bolt-anchorage system in supporting clay slopes BFRP锚固体系在粘土边坡支护中的锚固机理及性能试验研究

IF 5 2区材料科学

Polymer Testing Pub Date : 2025-04-23 DOI: 10.1016/j.polymertesting.2025.108822

Jibin Chen , Xiaobo Lv , Jingwen Kang , Guanglei Liu , Yongxiang Zhou

{"title":"Experimental study on the anchoring mechanism and performance of BFRP bolt-anchorage system in supporting clay slopes","authors":"Jibin Chen , Xiaobo Lv , Jingwen Kang , Guanglei Liu , Yongxiang Zhou","doi":"10.1016/j.polymertesting.2025.108822","DOIUrl":"10.1016/j.polymertesting.2025.108822","url":null,"abstract":"<div><div>The experimental studies were performed to examine the failure mechanism and the capacity of BFRP bolt-anchorage system under laboratory and field conditions in supporting clay slopes in Sichuan Basin, China. The results indicate that BFRP anchor bolts, designed based on the principle of equal strength replacement between bolt tensile strength and the bonding strength of the first interface, can meet the safety standards required for slope engineering. During the stable phase of the slope, the mechanical behavior and deformation characteristics of BFRP anchor bolts are comparable to those of steel anchor bolts, with the axial force of BFRP bolts being 1/3 to 1/4 lower than the designed value. When the slope enters the accelerated creep stage, the axial force of steel anchor bolts exceeds the designed value by 40 %, while the axial force of BFRP bolts remains at only 2/3 of that of steel bolts. The failure mechanisms of the BFRP bolt-anchorage system primarily involve shear failure at the bolt-mortar interface and pullout failure of the bolt body, which are attributed to the cumulative damage of the polymer material. Based on the experimental findings, it is recommended that the minimum tensile safety factor for BFRP bars used in temporary slope support should be set at 1.26. This study enhances the understanding of BFRP anchorage systems in clay soil environments and provides valuable insights for the design and construction of infrastructure projects in similar geological conditions.</div></div>","PeriodicalId":20628,"journal":{"name":"Polymer Testing","volume":"147 ","pages":"Article 108822"},"PeriodicalIF":5.0,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143873517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanical and electrical properties of a polymer electrolyte based on zinc oxide for enhancement of Li-ion battery performance 用于提高锂离子电池性能的氧化锌聚合物电解质的机械和电学性能

IF 5 2区材料科学

Polymer Testing Pub Date : 2025-04-18 DOI: 10.1016/j.polymertesting.2025.108821

Peng Zhang

{"title":"Mechanical and electrical properties of a polymer electrolyte based on zinc oxide for enhancement of Li-ion battery performance","authors":"Peng Zhang","doi":"10.1016/j.polymertesting.2025.108821","DOIUrl":"10.1016/j.polymertesting.2025.108821","url":null,"abstract":"<div><div>This work was carried out to synthesize and apply mesoporous 3-mercaptopropyl pyridine-ZnO nanorods (MPP-ZnO NRs) as additives in a cross-linked composite gel polymer electrolyte for enhancing the performance of lithium-ion batteries. The MPP-ZnO NRs were synthesized using a sol-gel method and functionalized with MPP. The electrospun fibrous polyacrylonitrile (PAN) membrane was coated with ZnO nanorods, forming a stable and robust composite electrolyte. Results of mechanical tests indicated that compared to control membranes (without ZnO NRs), the MPP-ZnO-containing membranes showed significant enhancements, likely an increase in tensile strength (∼1.5-fold), an enhancement in adhesion strength (∼4-fold), and an increase in shear stress (∼3-fold). Electrochemical performance was evaluated using charge-discharge cycling and AC impedance spectroscopy tests. Findings demonstrated that utilizing cross-linked gel-polymer electrolytes with MPP-ZnO NRs showed lower charge transfer resistance and superior cycling stability, maintaining 89.0 % capacity retention after 200 cycles at 0.5C, with an initial discharge capacity of 179.9 mAh/g and 160.1 mAh/g after 200 cycles. Moreover, these cells showed remarkable capacity recovery, with an18 % higher capacity at 5.0C compared to non-porous counterparts and delivering discharge capacity of 139.8 mAh/g at 5.0C. Results showed good high-rate performance due to improved thermal stability and HF scavenging ability of the mesoporous MPP-ZnO NR-based electrolyte. These results indicate the potential of mesoporous MPP-ZnO NRs in advancing the performance and stability of lithium-ion batteries, making them as low-cost candidates for future energy storage applications.</div></div>","PeriodicalId":20628,"journal":{"name":"Polymer Testing","volume":"147 ","pages":"Article 108821"},"PeriodicalIF":5.0,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143868648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-adhesive and conductive AMPSs-TA-Fe hydrogels via E-beam-assisted rapid one-pot synthesis for strain sensor 通过电子束辅助快速一锅合成用于应变传感器的高粘接和导电amps - ta - fe水凝胶

IF 5 2区材料科学

Polymer Testing Pub Date : 2025-04-17 DOI: 10.1016/j.polymertesting.2025.108818

Eunhye Kim , Heewoong Park , Ngo Thi Hang , Daewoo Kim , Seunghan Shin , Kiok Kwon

{"title":"High-adhesive and conductive AMPSs-TA-Fe hydrogels via E-beam-assisted rapid one-pot synthesis for strain sensor","authors":"Eunhye Kim , Heewoong Park , Ngo Thi Hang , Daewoo Kim , Seunghan Shin , Kiok Kwon","doi":"10.1016/j.polymertesting.2025.108818","DOIUrl":"10.1016/j.polymertesting.2025.108818","url":null,"abstract":"<div><div>The development of high-performance hydrogels with high ionic conductivity, mechanical stability, and exceptional skin adhesion, even under wet conditions, is crucial for advancements in wearable electronics. With abundant hydroxyl groups, tannic acid (TA) is renowned for its adhesion to skin in moist environments, facilitated by coordination bonds with metal ions such as Fe<sup>3+</sup>. However, TA's radical scavenging effect complicates polymerization by UV or thermal curing, leading prior studies to adopt time-intensive, costly approaches, such as post-polymerization soaking or pre-formed polymers. Here, we used E-beam irradiation for rapid, one-pot in situ polymerization from a precursor solution of 2-Acrylamido-2-methylpropanesulfonic acid sodium salt (AMPSs), TA, and Fe ions, incorporating all components in a single step. We report the successful synthesis of a multifunctional hydrogel with exceptional skin adhesion, high ionic conductivity, strong mechanical strength, excellent recovery, and self-healing properties, all achieved through a simple one-pot electron beam curing method in just 13.89 s. This remarkable curing time contrasts with the lengthy durations (1–8 h) of conventional TA-incorporating methods, eliminating the need for heat or UV initiators. The resulting P(AMPSs-TA-Fe) hydrogel exhibited high skin adhesion (154.53 N/m) due to TA-Fe coordination and excellent ionic conductivity (2.71 S/m) from AMPSs, Fe<sup>3+</sup> ions, and TA's ion-bridging effect. The reversible TA-Fe bonding also imparted strong fatigue resistance (1.32 kJ/m<sup>3</sup> at 200 % strain) and self-healing, enabling conductivity recovery within 2.4 s after damage. Overall, the P(AMPSs-TA-Fe) hydrogel shows great promise for flexible sensors, combining robust mechanical performance, excellent skin adhesion, high ionic conductivity, and rapid self-healing.</div></div>","PeriodicalId":20628,"journal":{"name":"Polymer Testing","volume":"147 ","pages":"Article 108818"},"PeriodicalIF":5.0,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143854379","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lifetime prediction and degradation assessment of FKM and FFKM O-rings under high temperature thermo-oxidative ageing FKM和FFKM o型环高温热氧化老化寿命预测及降解评价

IF 5 2区材料科学

Polymer Testing Pub Date : 2025-04-17 DOI: 10.1016/j.polymertesting.2025.108820

Estefanía Vega Puga , Volker Wachtendorf , Anja Kömmling , Stefan Brendelberger , Matthias Jaunich , Christian Sattler

{"title":"Lifetime prediction and degradation assessment of FKM and FFKM O-rings under high temperature thermo-oxidative ageing","authors":"Estefanía Vega Puga , Volker Wachtendorf , Anja Kömmling , Stefan Brendelberger , Matthias Jaunich , Christian Sattler","doi":"10.1016/j.polymertesting.2025.108820","DOIUrl":"10.1016/j.polymertesting.2025.108820","url":null,"abstract":"<div><div>To support the development of solar reactor technologies for hydrogen production, this study investigates the thermo-oxidative degradation mechanisms of fluorinated elastomers and predicts their lifetimes at high temperatures (200–300 °C) consistent with the application requirements. An accelerated ageing programme is conducted with FKM and FFKM O-rings and flat samples for up to 21 days. Optical microscopy is used to analyse the exposed seals' morphological changes, while IR microscopy is utilised to investigate the underlying chemical degradation mechanisms of both elastomers. Findings suggest that FKM's degradation arises from dehydrofluorination of the polymer, followed by chain scission and backbone cleavage as a result of the oxidation of newly formed C=C double bonds. FFKM's degradation is primarily associated with chain scission, but there is also indication that post-curing processes may occur during material ageing. Furthermore, hardness, equilibrium compression set (CS), continuous compression stress relaxation (CSR) and leakage rate tests are used to evaluate changes in the mechanical properties and sealing performance of the elastomers. Equilibrium CS data is extrapolated using time-temperature shifts (TTS) and used to derive an end-of-life criterion of 75 % equilibrium CS, which correlates to leakage rates higher than a predetermined threshold. Service lifetime predictions of FKM and FFKM O-rings at several temperatures are performed and a seal operating temperature of 200 °C is suggested, which ensures reasonable O-ring replacement intervals of more than half a year in the solar reactor for both considered materials.</div></div>","PeriodicalId":20628,"journal":{"name":"Polymer Testing","volume":"147 ","pages":"Article 108820"},"PeriodicalIF":5.0,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143851821","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ultra-durable Janus fabric treated with femtosecond laser for personal anti-fouling and thermal management 超耐用Janus织物处理与飞秒激光个人防污和热管理

IF 5 2区材料科学

Polymer Testing Pub Date : 2025-04-15 DOI: 10.1016/j.polymertesting.2025.108815

Ang Li , Bowen Chen , Jing Wu , Jiahui Gao , Juan Zhang , Xiangqian Guan

{"title":"Ultra-durable Janus fabric treated with femtosecond laser for personal anti-fouling and thermal management","authors":"Ang Li , Bowen Chen , Jing Wu , Jiahui Gao , Juan Zhang , Xiangqian Guan","doi":"10.1016/j.polymertesting.2025.108815","DOIUrl":"10.1016/j.polymertesting.2025.108815","url":null,"abstract":"<div><div>Janus fabrics with moisture and heat-management capabilities are capable of improving the physiological and psychological comfort of humans. However, the current manufacturing processes for Janus fabrics are complex, expensive, and environmentally unfriendly. Moreover, the poor durability of the produced fabrics prevents them from meeting the requirements of daily use and washing. In this study, Janus fabric was prepared by spraying hydrophobic SiO<sub>2</sub> particles onto hydrophilic cotton fabrics, followed by femtosecond-laser scanning. The prepared Janus fabric exhibited an excellent unidirectional liquid transport capability and could unidirectionally transport sweat from a hydrophobic to hydrophilic surface. The superhydrophobic surface of the Janus fabric provided outstanding antifouling properties, effectively preventing the adhesion of dirt and bacteria. More importantly, the Janus fabric could withstand approximately 1000 abrasion cycles and 30 accelerated washing cycles, which was a significant indication that it would be capable of daily use. In addition, the Janus fabric provided a cooler feeling than a conventional cotton fabric (≈4.9 °C lower than when wearing cotton fabric), and had an excellent water evaporation rate and moisture permeability. This method provided new insights into the development of economical and environmentally friendly ultradurable Janus fabrics.</div></div>","PeriodicalId":20628,"journal":{"name":"Polymer Testing","volume":"147 ","pages":"Article 108815"},"PeriodicalIF":5.0,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143847598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pea protein isolate-alginates bio-composite Film: Enhancing performance with pomegranate flower extract 豌豆分离蛋白-海藻酸盐生物复合膜：石榴花提取物增强性能

IF 5 2区材料科学

Polymer Testing Pub Date : 2025-04-15 DOI: 10.1016/j.polymertesting.2025.108816

Mohammad Pilehforooshha , Mohsen Zandi , Ali Ganjloo , Nazila Dardmeh

{"title":"Pea protein isolate-alginates bio-composite Film: Enhancing performance with pomegranate flower extract","authors":"Mohammad Pilehforooshha , Mohsen Zandi , Ali Ganjloo , Nazila Dardmeh","doi":"10.1016/j.polymertesting.2025.108816","DOIUrl":"10.1016/j.polymertesting.2025.108816","url":null,"abstract":"<div><div>The present study aimed to develop a novel composite film based on pea protein isolate (PPI)-alginate containing pomegranate flower extract (PFE). The effects of various PPI to alginate ratios (1:1, 1:3, and 1:5) and PFE concentrations (0 %, 5 %, and 10 % v/v) on the on the bio-composite films. FTIR and DSC analyses revealed molecular interactions and enhanced thermal stability with increased protein content and decreased PFE concentration. XRD results indicated higher crystallinity in films with higher protein content and lower extract concentration. FESEM images displayed smooth and compact structures in films with high protein content without extract, resulting in increased tensile strength, elastic modulus, and contact angle. Functional properties, including water vapor and oxygen permeability, water solubility, moisture content, and swelling ratio, decreased by 56.58 %, 46.71 %, 60.21 %, 54.54 %, and 58.67 %, respectively, in films with a 1:5 protein to alginate ratio containing 0 % PFE compared to films with a 1:1 ratio containing 10 % PFE. Increased protein content and extract concentration enhanced opacity and antioxidant activity but reduced biodegradability rate, although all films degraded by over 75 % within 60 days. Films containing 10 % extract exhibited the highest antimicrobial activity and total phenolic content. Release studies demonstrated controlled rapid and slow release of the extract in aqueous and fatty simulants, respectively. The developed active bio-composite film shows significant potential for applications in medicine, cosmetics, pharmaceuticals, and food industries.</div></div>","PeriodicalId":20628,"journal":{"name":"Polymer Testing","volume":"147 ","pages":"Article 108816"},"PeriodicalIF":5.0,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143844055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation and performance evaluation of Zn-N-TiO2 nanoparticles-containing dental adhesive 含Zn-N-TiO2纳米牙胶粘剂的制备及性能评价

IF 5 2区材料科学

Polymer Testing Pub Date : 2025-04-15 DOI: 10.1016/j.polymertesting.2025.108814

Rong Han , Zhimin Zhang , Yuanhang Zhao , Linlin Yan , Wenjun Tang , Hong Zhang

{"title":"Preparation and performance evaluation of Zn-N-TiO2 nanoparticles-containing dental adhesive","authors":"Rong Han , Zhimin Zhang , Yuanhang Zhao , Linlin Yan , Wenjun Tang , Hong Zhang","doi":"10.1016/j.polymertesting.2025.108814","DOIUrl":"10.1016/j.polymertesting.2025.108814","url":null,"abstract":"<div><div>Dentin adhesives (DAs) are essential for securely bonding restorations to tooth structures. Traditional DA formulations exhibit insufficient antibacterial properties, resulting in increased susceptibility to secondary caries at the adhesive interface, ultimately compromising restoration longevity. Thus, to improve the success rate of treatment, developing new antibacterial DAs is crucial. In this study, we synthesized zinc and nitrogen co-doped titanium dioxide (Zn-N-TiO<sub>2</sub>) with a predominantly anatase-phase structure, which exhibits antibacterial properties through the generation of reactive oxygen species (ROS). We selected nanoparticles with a 3 % doping concentration of Zn and N for their notable antibacterial activity, and then added them into DAs at varying mass ratios. Experimental results demonstrated that the DAs effectively inhibited <em>Streptococcus mutans</em> (<em>S. mutans</em>). With the exception of the 7 wt% group, the cytotoxicity levels in all other groups were 0 or I, indicating high biocompatibility. The tensile bond strength (TBS) ranged from 30.66 ± 3.22 MPa to 32.04 ± 2.24 MPa, which indicates its potential to provide reliable bonding performance in clinical applications. This research offers valuable insights for the development of antibacterial DAs.</div></div>","PeriodicalId":20628,"journal":{"name":"Polymer Testing","volume":"147 ","pages":"Article 108814"},"PeriodicalIF":5.0,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143858793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Significant enhancement of elasticity of PTT fiber via introduction of helical carbon nanotubes as nano ‘spring' 螺旋碳纳米管作为纳米“弹簧”对PTT纤维弹性的显著增强

IF 5 2区材料科学

Polymer Testing Pub Date : 2025-04-15 DOI: 10.1016/j.polymertesting.2025.108817

Chenhua Yang, Leyu Dai, Jun Sun, Yingjie Chang, Zhichao Zhou, Chuanxiang Qin, Jianjun Wang, Xinbo Wang, Lixing Dai

{"title":"Significant enhancement of elasticity of PTT fiber via introduction of helical carbon nanotubes as nano ‘spring'","authors":"Chenhua Yang, Leyu Dai, Jun Sun, Yingjie Chang, Zhichao Zhou, Chuanxiang Qin, Jianjun Wang, Xinbo Wang, Lixing Dai","doi":"10.1016/j.polymertesting.2025.108817","DOIUrl":"10.1016/j.polymertesting.2025.108817","url":null,"abstract":"<div><div>Due to its excellent physical properties and outstanding resilience, poly (trimethylene terephthalate) (PTT) fiber is widely used for daily clothing, work clothing, sportswear, and casual wear. However, in some special cases where both large elongation and quick recovery are required, PTT fiber still faces challenges. In this paper, one facile and novel approach to improve the elasticity of PTT fiber through introducing helical carbon nanotubes (HCNTs) as nano ‘spring’. PTT fiber containing modified HCNTs (PTTHf) was successfully prepared through melt spinning and heat drawing. After 100 cycles of stretching testing, the elastic recovery ratio of PTTHf was still high up to 96 % at fixed elongation of 10 %, which was 22 % higher than that of control PTT fiber (PTTf). More interestingly, the complete recovery time of PTTHf-1.0 at fixed elongation of 20 % was only 5 min, while that of PTTf soared to more than 30 min. The instantaneous recovery speed of PTTHf-1.0 was extraordinarily as high as 50 %/ms, while that of PTTf was only 1.8 %/ms, reflecting the effect of the ‘spring’ characteristics of HCNTs.</div></div>","PeriodicalId":20628,"journal":{"name":"Polymer Testing","volume":"147 ","pages":"Article 108817"},"PeriodicalIF":5.0,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143844054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0