Polymer International最新文献_第4页

Exploring biofiber properties and their influence on biocomposite tensile properties 探索生物纤维特性及其对生物复合材料拉伸特性的影响

IF 3.2 4区化学

Polymer International Pub Date : 2024-08-29 DOI: 10.1002/pi.6696

Oluwafemi A. Oyedeji, Jocelyn Hess, Xianhui Zhao, Luke Williams, Rachel Emerson, Erin Webb

{"title":"Exploring biofiber properties and their influence on biocomposite tensile properties","authors":"Oluwafemi A. Oyedeji, Jocelyn Hess, Xianhui Zhao, Luke Williams, Rachel Emerson, Erin Webb","doi":"10.1002/pi.6696","DOIUrl":"https://doi.org/10.1002/pi.6696","url":null,"abstract":"Biofibers serve as effective reinforcements for neat polylactic acid (PLA) in biocomposites, offering an attractive opportunity to decarbonize the manufacturing sector of the United States by displacing fossil‐based reinforcement fibers such as carbon fibers. Also, biofiber production can stimulate economic growth in rural economies, fueling sustainable development. PLA resins are commonly compounded with biofibers to create biocomposites suitable for additive manufacturing. PLA‐biofiber composites often exhibit better overall material properties than neat (pure) PLA, but the associations between biofiber properties and the material properties of their biocomposites remain largely unexplored. Hence, this research delves into a comprehensive exploration of diverse biofibers, scrutinizing their physical and chemical attributes, including size, shape, ash content and biochemical composition. The study meticulously analyzes the flow properties of each biofiber and elucidates the ultimate tensile strengths and Young's modulus of corresponding biocomposite samples. Noteworthy correlations between biofiber and biocomposite tensile properties are uncovered, shedding light on critical interrelationships. The study introduces an approach employing regression models to predict the ultimate tensile strength and Young's modulus of biocomposites. These models, validated with a cross‐validation technique, exhibit remarkable predictive accuracy, particularly in estimating ultimate tensile strength. © 2024 Oak Ridge National Laboratory managed by UT‐Battelle, LLC and The Author(s). Polymer International published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.","PeriodicalId":20404,"journal":{"name":"Polymer International","volume":"1 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142200787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Binary nanoconjugation of zein–methylcellulose for improving curcumin properties: solubility, controlled release and anticancer activity 改善姜黄素特性的玉米蛋白-甲基纤维素二元纳米共轭：可溶性、控释性和抗癌活性

IF 2.9 4区化学

Polymer International Pub Date : 2024-08-28 DOI: 10.1002/pi.6694

Sana F Abaza, Nihal S Elbialy, Noha Mohamed

{"title":"Binary nanoconjugation of zein–methylcellulose for improving curcumin properties: solubility, controlled release and anticancer activity","authors":"Sana F Abaza, Nihal S Elbialy, Noha Mohamed","doi":"10.1002/pi.6694","DOIUrl":"10.1002/pi.6694","url":null,"abstract":"For cancer treatment, a novel nanocarrier has been developed, utilizing natural compounds. Zein protein (Z) and methylcellulose (MC) polysaccharide were formulated as a nanocarrier for nutraceutical curcumin (Cur). The zein–methylcellulose nanoconjugate (ZMC) appeared spherical/monodispersed in transmission electron microscopy images. Hydrodynamic sizes were 164 ± 20.2 and 190 ± 28.2 nm for ZMC and ZMC@Cur, respectively. For both formulations, zeta potential, differential scanning calorimetry, Fourier transform infrared spectroscopy and X-ray diffraction analyses were conducted. Curcumin encapsulation efficiency was 92%, and its release profile was pH responsive. Using MTT assay, ZMC@Cur demonstrated a significant cytotoxic effect against MCF-7 and HepG2, surpassing the impact of curcumin. This underscores the pivotal role of ZMC@Cur in enhancing curcumin properties, thereby potentiating cancer cell death. Compared with free curcumin, ZMC@Cur markedly promoted DNA damage in cancer cells, owing to precise curcumin targeting into the nucleus. Accordingly, the proposed bionanocomposite stands as an efficient vehicle for curcumin, showcasing its crucial role in combating cancer via improving the pharmaceutical properties of curcumin. © 2024 Society of Chemical Industry.","PeriodicalId":20404,"journal":{"name":"Polymer International","volume":"74 2","pages":"118-126"},"PeriodicalIF":2.9,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142200788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Poly(ether ketone ketone)/hollow silica filler substrates and application for sixth generation communication 聚醚酮酮/中空二氧化硅填料基材及在第六代通信中的应用

IF 2.9 4区化学

Polymer International Pub Date : 2024-08-27 DOI: 10.1002/pi.6690

Xing-yu Wei, Zhi-wen Lei, Ning Ma, Tim Hsu, Ya-qiong Huang, Jen-taut Yeh

{"title":"Poly(ether ketone ketone)/hollow silica filler substrates and application for sixth generation communication","authors":"Xing-yu Wei, Zhi-wen Lei, Ning Ma, Tim Hsu, Ya-qiong Huang, Jen-taut Yeh","doi":"10.1002/pi.6690","DOIUrl":"10.1002/pi.6690","url":null,"abstract":"The influence of density and shape of hollow silicas (silica hollow tubes (SHT) or hollow glass microspheres (HGM)) on dielectric and heat-resisting characteristics of poly(ether ketone ketone) (PEKK)/SHT and PEKK/HGM films was systematically investigated. The dielectric characteristics of PEKK/SHT or PEKK/HGM films decrease to a minimum, as their SHT or HGM contents approach 8 or 20 wt%, respectively, and the minimum dielectric constant (εr) and dielectric loss (tan δ) of PEKK/SHT or PEKK/HGM films decrease visibly with decreasing SHT densities. By filling with 0.46 g cm−3 mean density of SHT or HGM fillers, the minimum εr and tan δ of PEKK/SHT films are somewhat smaller than those of PEKK/HGM films. The linear coefficient of thermal expansion (LCTE) values of PEKK/SHT or PEKK/HGM films reduce and their onset degradation temperature values increase gradually with increasing SHT and HGM contents. Low εr/tan δ (2.11/0.0022 and 2.2/0.0027 at 1 MHz), LCTE (35.5 × 10−6 and 31.2 × 10−6 °C−1) and excellent heat-resisting properties favorable for sixth generation (6G) ultrarapid communication are realized for appropriately prepared PEKK/SHT and PEKK/HGM substrate films. The free-volume-hole characteristics of PEKK/HGM or PEKK/SHT films approach a maximum as SHT or HGM contents reach an optimum value of 8 or 20 wt%, respectively. © 2024 Society of Chemical Industry.","PeriodicalId":20404,"journal":{"name":"Polymer International","volume":"73 12","pages":"1071-1080"},"PeriodicalIF":2.9,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142200790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation of biodegradable poly(lactic acid)/poly[(butylene diglycolate)‐co‐furandicarboxylate] blends with excellent toughness and gas barrier performance 制备具有优异韧性和气体阻隔性能的可生物降解聚（乳酸）/聚[（丁烯二醇）-共呋喃二甲酸酯]共混物

IF 3.2 4区化学

Polymer International Pub Date : 2024-08-27 DOI: 10.1002/pi.6692

Yong Yang, Jing Shen, Erxun Hu, Yajin Fang, Zhibo Xu, Juan Li

{"title":"Preparation of biodegradable poly(lactic acid)/poly[(butylene diglycolate)‐co‐furandicarboxylate] blends with excellent toughness and gas barrier performance","authors":"Yong Yang, Jing Shen, Erxun Hu, Yajin Fang, Zhibo Xu, Juan Li","doi":"10.1002/pi.6692","DOIUrl":"https://doi.org/10.1002/pi.6692","url":null,"abstract":"Poly(lactic acid) (PLA) is known as one of the most promising biodegradable polyesters, while inherent brittleness and insufficient gas barrier performance limit its potential application as a film material. Herein, poly[(butylene diglycolate)‐co‐furandicarboxylate] (PBDF) with excellent flexibility and good gas barrier properties was synthesized and then melt‐blended with PLA. Compared with neat PLA, the elongation at break of the PLA/PBDF20 blend increased more than 40 times and reached over 176.7%. In addition, its O2, CO2 and H2O permeability coefficients decreased by 21.3%, 50.8% and 46.3%, respectively. Moreover, the PLA/PBDF20 blend also exhibited better biodegradability, with a weight loss rate increasing from 2.7% of neat PLA to 19.0% after 5 weeks of composting. Notably, incorporation of a multifunctional epoxy compatibilizer (Joncryl ADR®‐4368) into the PLA/PBDF blends further enhanced their toughness and gas barrier performance, which could be attributed to the improvement of the miscibility between PLA and PBDF. © 2024 Society of Chemical Industry.","PeriodicalId":20404,"journal":{"name":"Polymer International","volume":"70 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142200793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Functional and physicochemical characterization of marine exopolysaccharide derived from the novel bacterium Algoriphagus sp. K5R and its application towards biomineralization of gold and silver 从新型细菌 Algoriphagus sp. K5R 提取的海洋外多糖的功能和理化特性及其在金银生物矿化中的应用

IF 2.9 4区化学

Polymer International Pub Date : 2024-08-27 DOI: 10.1002/pi.6693

Tixit Sagpariya, Nandita Srivastava, Sumeeta Kumari, Anil Kumar Pinnaka, Anirban Roy Choudhury

{"title":"Functional and physicochemical characterization of marine exopolysaccharide derived from the novel bacterium Algoriphagus sp. K5R and its application towards biomineralization of gold and silver","authors":"Tixit Sagpariya, Nandita Srivastava, Sumeeta Kumari, Anil Kumar Pinnaka, Anirban Roy Choudhury","doi":"10.1002/pi.6693","DOIUrl":"10.1002/pi.6693","url":null,"abstract":"The widespread use of synthetic polymers in various industries has raised worldwide concerns regarding their ecological impact and effects on human health. As a result, biopolymers have emerged as a promising alternative. Among them, exopolysaccharides (EPSs) produced by microbes from terrestrial niches have been extensively studied. However, recent reports have indicated that microbes from marine environments can also produce unique EPSs that could serve as sustainable substitutes to meet the escalating demand for biopolymers. The present study, for the first time, reports EPS production from novel marine bacterium Algoriphagus sp. K5R for sustainable application development. Interestingly, physicochemical analyses suggest that EPS K5R is a high molecular weight (1190.63 kDa) heteropolysaccharide composed of galacturonic acid, glucose and mannose. To evaluate EPS production, growth and fermentation kinetics were performed, which revealed that it was a primary metabolite having a maximum production of 4.79 ± 0.57 g L−1 with 2% (w/v) glucose. Moreover, EPS K5R exhibits exceptional functional properties, namely high water-holding capacity (720% ± 80.29%) and oil-holding capacity (493.33% ± 49.74% for coconut oil and 533.32% ± 17.47% for olive oil), and non-Newtonian pseudo-plastic behavior which render it a promising candidate for application in the cosmetics and food industries. In fact, its anti-oxidant capabilities make it an ideal biological reducing agent for metal nanoparticle synthesis. Overall, this study highlights the potential of marine EPSs for a diverse array of industrial applications. © 2024 Society of Chemical Industry.","PeriodicalId":20404,"journal":{"name":"Polymer International","volume":"74 2","pages":"107-117"},"PeriodicalIF":2.9,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142200789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation of a starch derivative bearing chloroaniline groups and the evaluation of its hemolytic, cytotoxic and antibacterial activities 含氯苯胺基团的淀粉衍生物的制备及其溶血、细胞毒性和抗菌活性的评估

IF 2.9 4区化学

Polymer International Pub Date : 2024-08-05 DOI: 10.1002/pi.6689

María Fernanda Valdez-Valdés, Francisco Javier Enríquez-Medrano, Alejandro Zugasti-Cruz, Crystel Aleyvick Sierra-Rivera, Eder Iván Martínez-Mora, Gerardo de Jesús Sosa-Santillán, Ernesto Oyervides-Muñoz

{"title":"Preparation of a starch derivative bearing chloroaniline groups and the evaluation of its hemolytic, cytotoxic and antibacterial activities","authors":"María Fernanda Valdez-Valdés, Francisco Javier Enríquez-Medrano, Alejandro Zugasti-Cruz, Crystel Aleyvick Sierra-Rivera, Eder Iván Martínez-Mora, Gerardo de Jesús Sosa-Santillán, Ernesto Oyervides-Muñoz","doi":"10.1002/pi.6689","DOIUrl":"10.1002/pi.6689","url":null,"abstract":"A new starch derivative with antibacterial properties and non-hemolytic effect was synthesized through the chemical grafting of 4-chloroaniline onto the backbone of potato starch. In a first step, starch was extracted from potatoes grown in the region of Coahuila, Mexico, using the water steeping method. The hydroxyl groups (C5-C6) of the native starch were oxidized using sodium periodate. The resulting dialdehyde was then chemically modified through a Schiff base reaction with 4-chloroaniline. The chemical structure of this starch derivative was confirmed by Fourier transform infrared and 1H NMR spectroscopies, the thermal properties were analyzed by thermogravimetric analysis without finding significant changes and the product showed antibacterial activity against Gram-negative E. coli and Gram-positive S. aureus strains. Finally, the hemolytic and cytotoxic effects of native starch and its derivative were studied, showing no hemolytic effect on isolated human red blood cells and no cytotoxic effect; therefore, it can be considered biocompatible. © 2024 Society of Chemical Industry.","PeriodicalId":20404,"journal":{"name":"Polymer International","volume":"74 1","pages":"46-53"},"PeriodicalIF":2.9,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141946930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancement in the impact and torsional properties of 3D‐printed biocompatible poly(lactic acid) locking bone plates: sustainable integration into healthcare applications 增强三维打印生物相容性聚（乳酸）锁定骨板的冲击和扭转性能：可持续地融入医疗保健应用中

IF 3.2 4区化学

Polymer International Pub Date : 2024-08-02 DOI: 10.1002/pi.6688

Shrutika Sharma, Vishal Gupta, Deepa Mudgal

{"title":"Enhancement in the impact and torsional properties of 3D‐printed biocompatible poly(lactic acid) locking bone plates: sustainable integration into healthcare applications","authors":"Shrutika Sharma, Vishal Gupta, Deepa Mudgal","doi":"10.1002/pi.6688","DOIUrl":"https://doi.org/10.1002/pi.6688","url":null,"abstract":"Locking bone plates (LoBPs) are utilized in orthopedic surgeries for supporting segments of distal ulna fracture. Primarily constructed from metallic biomaterials that are much stiffer than natural bone, LoBPs result in stress shielding and are prone to corrosion. As a result, there has been a growing preference for biocompatible and biodegradable polymeric biomaterials for creating patient‐specific implants using 3D printing. Among various biomaterials, poly(lactic acid) (PLA) stands out due to its favorable biocompatibility and biodegradability. The layer‐by‐layer deposition in this process raises issues about layer bonding, reducing the mechanical strength of the implants. Nevertheless, adjusting process parameters can enhance the mechanical strength of the produced parts. The current study aimed to examine the influence of printing parameters on the impact strength and torque withstanding ability of biocompatible and biodegradable PLA‐based LoBPs using response surface methodology. The experimental results reveal that an increase in infill density and wall thickness minimize porosity and enhance inter‐layer bonding, imparting high impact and torsional resistance against forces. Conversely, an increase in layer height and printing speed induces porosity, leading to early fracture of layers under sudden impact and torsional forces. The fractured surface morphology of LoBPs after impact and torsional testing was analyzed using SEM. The MATLAB‐based optimization yielded maximum impact strength and torque values of 27.175 kJ m−2 and 3644 N mm, respectively. The study underscores the potential of biocompatible and biodegradable PLA‐based 3D‐printed LoBPs for sustainable integration into biomedical applications. © 2024 Society of Chemical Industry.","PeriodicalId":20404,"journal":{"name":"Polymer International","volume":"56 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141884065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A review on sustainable properties of plant fiber-reinforced polymer composites: characteristics and properties 植物纤维增强聚合物复合材料的可持续特性综述：特性和性能

IF 2.9 4区化学

Polymer International Pub Date : 2024-07-31 DOI: 10.1002/pi.6686

Mariappan Sathish, Nachimuthu Radhika, Nitin Venuvanka, Lakshminarasimhan Rajeshkumar

{"title":"A review on sustainable properties of plant fiber-reinforced polymer composites: characteristics and properties","authors":"Mariappan Sathish, Nachimuthu Radhika, Nitin Venuvanka, Lakshminarasimhan Rajeshkumar","doi":"10.1002/pi.6686","DOIUrl":"10.1002/pi.6686","url":null,"abstract":"Fiber-reinforced composites have emerged as versatile materials with applications spanning diverse industries, driven by their exceptional mechanical properties and lightweight nature. This review provides a comprehensive overview of natural fiber-reinforced composites, focusing on their enhanced mechanical and functional properties achieved through modern processing techniques. The study delves into various manufacturing methods, such as thermoforming, additive manufacturing, compression molding, electro-spinning, pultrusion and autoclave molding, which have significantly contributed to the advancement of these composites. The review further investigates the multifaceted properties of these composites, which highlights the versatility and applicability of these materials and provides a holistic understanding of their potential applications. Additionally, the work addresses current research gaps and identifies prospects, shedding light on the evolving landscape of natural fiber-reinforced composites. The synthesis of processing techniques, material properties and potential applications offers valuable insights for researchers, practitioners and industries aiming to harness the full potential of these sustainable and high-performance materials. © 2024 Society of Chemical Industry.","PeriodicalId":20404,"journal":{"name":"Polymer International","volume":"73 11","pages":"887-943"},"PeriodicalIF":2.9,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141869948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reducing the moisture susceptibility of recycled hot‐mix asphalt mixture with composite modification technology 利用复合改性技术降低再生热拌沥青混合料的易受潮性

IF 3.2 4区化学

Polymer International Pub Date : 2024-07-31 DOI: 10.1002/pi.6687

Jianping Xiong, Lihao Zeng, Yuquan Yao, Jie Gao, Di Yu

{"title":"Reducing the moisture susceptibility of recycled hot‐mix asphalt mixture with composite modification technology","authors":"Jianping Xiong, Lihao Zeng, Yuquan Yao, Jie Gao, Di Yu","doi":"10.1002/pi.6687","DOIUrl":"https://doi.org/10.1002/pi.6687","url":null,"abstract":"Styrene–butadiene–styrene block copolymer (SBS)‐modified asphalt is a key material for constructing recycled hot‐mix asphalt mixtures (RHMAs). However, these mixtures still risk insufficient moisture stability. To this end, this study investigates the feasibility of asphalt composite modification technology to enhance RHMA performance. SBS, high‐viscosity agent (HVA) and crumb‐rubber materials (CRM) were used to prepare SBS‐HVA‐ and SBS‐CRM‐modified asphalt, with SBS‐modified asphalt as the control group, and the adhesion properties of the asphalt were evaluated using surface free energy tests. RHMAs with 50% reclaimed asphalt pavement were then prepared with each type of modified asphalt. The moisture susceptibility of these mixtures was analyzed using moisture‐induced sensitivity, freeze–thaw splitting and immersion Marshall tests. It was found that HVA significantly enhanced the adhesion of SBS‐modified asphalt under dry conditions, while CRM had a minimal effect. Compared to RHMA with SBS‐modified asphalt, HVA and CRM additives are crucial for enhancing the moisture stability of RHMA in the immersion Marshall test. However, CRM does not improve the moisture stability of RHMA in the moisture‐induced sensitivity and freezing–thaw splitting tests. From the conducted study, it can be proposed that SBS and HVA composite‐modified asphalt can be utilized in RHMAs to achieve higher moisture stability. © 2024 Society of Chemical Industry.","PeriodicalId":20404,"journal":{"name":"Polymer International","volume":"92 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141869947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Amphiphilic ligand-doped liquid crystal-based detection of Hg2+ ions on polyimide surface with alkyl pendent groups 基于两亲配体掺杂液晶的聚酰亚胺表面烷基悬垂基团 Hg2+ 离子检测技术

IF 2.9 4区化学

Polymer International Pub Date : 2024-07-26 DOI: 10.1002/pi.6684

Nasir Majeed, Humaira Masood Siddiqi, Iqra Urooj, Faroha Liaqat

{"title":"Amphiphilic ligand-doped liquid crystal-based detection of Hg2+ ions on polyimide surface with alkyl pendent groups","authors":"Nasir Majeed, Humaira Masood Siddiqi, Iqra Urooj, Faroha Liaqat","doi":"10.1002/pi.6684","DOIUrl":"10.1002/pi.6684","url":null,"abstract":"In this study, amphiphilic thiosemicarbazone was used to align liquid crystal (4-cyano-4′-pentylbiphenyl) in a homeotropic way on polyimide containing alkyl pendent groups (AHDPI), which was coated on a glass slide. The amphiphilic ligands 2-(4-(dodecyloxy)benzylid-ene)hydrazine-1-carbothioamide (DT) and 2-(1-dodecyl-2-oxoindolin-3-ylidene)hydrazine-1-carbothioamide (IT) were doped with liquid crystal (LC) to develop LC-based sensors to detect Hg2+ ions in water. The selective interaction of carbothioamide with Hg2+ ions triggered the orientation transition of LC from homeotropic to parallel alignment and gave dark to bright optical signal at the LC/aqueous interphase. Self-immobilization of thiosemicarbazone-based ligands on AHDPI-coated glass slide can be used to detect Hg2+ ions with high sensitivity. The limit of detection with DT and IT was found to be 0.5 and 0.25 μmol L−1, respectively. Density functional studies were carried out to study the interaction of the thiosemicarbazone ligands with mercuric ions, resulting in highly negative binding energies of −1.55 and −2.06 eV for DT and IT with Hg2+ ions, respectively. The chemical and thermal stability (up to 268 °C) of the AHDPI coated on glass slide made it reusable at least twice for sensor fabrication. This provides a quicker and cheaper alternative to traditional methods of sensor fabrication. © 2024 Society of Chemical Industry.","PeriodicalId":20404,"journal":{"name":"Polymer International","volume":"73 12","pages":"1051-1062"},"PeriodicalIF":2.9,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141783342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0