Journal of Polymers and the Environment最新文献_第9页

Enhancing Corn Starch Hydrogels for Effective Sorption of Potentially Toxic Metals: The Role of Amylose and Amylopectin Content 增强玉米淀粉水凝胶对潜在有毒金属的有效吸附：直链淀粉和支链淀粉含量的作用

IF 4.7 3区工程技术

Journal of Polymers and the Environment Pub Date : 2025-01-25 DOI: 10.1007/s10924-025-03495-7

Talles B. da Costa, Paulo H. Camani, Rafaela R. Ferreira, Rennan F. S. Barbosa, Derval dos S. Rosa

{"title":"Enhancing Corn Starch Hydrogels for Effective Sorption of Potentially Toxic Metals: The Role of Amylose and Amylopectin Content","authors":"Talles B. da Costa, Paulo H. Camani, Rafaela R. Ferreira, Rennan F. S. Barbosa, Derval dos S. Rosa","doi":"10.1007/s10924-025-03495-7","DOIUrl":"10.1007/s10924-025-03495-7","url":null,"abstract":"<div><p>This study evaluated the effect of corn starch's amylose/amylopectin content on the development of crosslinked hydrogels with trisodium citrate for the sorption of potentially toxic metals (PTMs). The results, obtained through a robust methodology, indicated a clear relation between the amylose content and crosslinking degree, thereby impacting the properties of the hydrogels. The hydrogel with high amylose (70 wt.%) and low amylopectin (30 wt.%) content (Hylon VII®) demonstrated a high crosslinking degree (0.297) and good thermal stability and water absorption (72.71%), with a semicrystalline structure. The hydrogel with low amylose (1.8 wt.%) and high amylopectin (98.2 wt.%) content (Amisol 4000®), on the other hand, showed the lowest degree of crosslinking (0.109), water absorption (49.77%), and high solubility (46%), which makes its applicability difficult due to its low stability in aqueous media. The influence of amylose (28 wt.%) and amylopectin (72 wt.%) content indicated that the Amisol 3408® hydrogel showed valuable properties, presenting a higher potential for PTMs sorption with the following affinity order: Cu<sup>2+</sup> (68.62%) > Cd<sup>2+</sup> (63.13%) > Mn<sup>2+</sup> (37.36%) > Zn<sup>2+</sup> (26.61%) > Cr<sup>6+</sup> (16.80%). Besides, the possible sorption mechanism was ion exchange between Cu<sup>2+</sup>/Cd<sup>2+</sup>/Mn<sup>2+</sup>/Zn<sup>2+</sup> and H<sup>+</sup> in the hydrogels. Thus, starch-based hydrogel is an alternative sorbent to remove and recover PTMs from wastewater.</p></div>","PeriodicalId":659,"journal":{"name":"Journal of Polymers and the Environment","volume":"33 3","pages":"1615 - 1635"},"PeriodicalIF":4.7,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation of Copolymers Based on Aniline and 2[2-chloro-1-methylbut-2-en-1-yl]Aniline and Their Application for the Removal of Methyl Orange from Aqueous Solutions 基于苯胺和 2[2-氯-1-甲基丁-2-烯-1-基]苯胺的共聚物的制备及其在去除水溶液中的甲基橙方面的应用

IF 4.7 3区工程技术

Journal of Polymers and the Environment Pub Date : 2025-01-20 DOI: 10.1007/s10924-024-03419-x

Gulsum S. Usmanova, Lyaysan R. Latypova, Alfia R. Yusupova, Akhat G. Mustafin

{"title":"Preparation of Copolymers Based on Aniline and 2[2-chloro-1-methylbut-2-en-1-yl]Aniline and Their Application for the Removal of Methyl Orange from Aqueous Solutions","authors":"Gulsum S. Usmanova, Lyaysan R. Latypova, Alfia R. Yusupova, Akhat G. Mustafin","doi":"10.1007/s10924-024-03419-x","DOIUrl":"10.1007/s10924-024-03419-x","url":null,"abstract":"<div><p>In this work, new copolymers P1-P9 were synthesized by oxidative copolymerization of aniline and 2-[2-chloro-1-methylbut-2-en-1-yl]aniline in HCl solution. The resulting copolymers were characterized by FTIR, UV-vis spectroscopy, thermogravimetric analysis, scanning electron microscopy, nitrogen adsorption-desorption isotherms, and particle size. The equilibrium, kinetics, isotherms, and thermodynamics of adsorption of methyl orange azo dye from aqueous solutions on P1-P9 copolymers were studied. The influence of physicochemical variables (dosage (0.01 g), contact time (480 min), pH (~ 7), dye concentration (20 mg/L or 0.061 mmol/L), temperature (25 °C), ionic strength of the solution) on the specific adsorption of the dye with removal efficiency up to 99.27% was determined. The adsorption of methyl orange followed the Langmuir model (correlation coefficient is 0.9774–0.9987), which corresponded to monolayer adsorption on a homogeneous surface. The kinetics of dye adsorption was described by a pseudo-second-order equation, which was characteristic of chemisorption, with the pseudo-second-order rate constant up to 0.0003–0.0028 g/mg min. The thermodynamic parameters such as ∆G°, ∆H°, and ∆S° were calculated to estimate the nature of adsorption. According to the standard enthalpy (12.37–43.70 kJ/mol), standard entropy (81.47–175.22 J/mol K), and Gibbs free energy (− 52.17-(-24.27) kJ/mol) values, it was determined that the dye adsorption was a spontaneous endothermic process. It was shown that P1-P4 exhibit good adsorption capacity up to 108.63-147.26 mg/g or 0.393–0.445 mmol/g. These copolymers retain high efficiency in five repeated adsorption-desorption cycles. The developed materials were considered to be suitable as cheap regenerated sorbents for anionic pollutants in wastewater.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><img></picture></div></div></figure></div></div>","PeriodicalId":659,"journal":{"name":"Journal of Polymers and the Environment","volume":"33 3","pages":"1585 - 1600"},"PeriodicalIF":4.7,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423502","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development and Thermo-Mechanical Analysis of Bio-based Epoxy Resin/Cardanol Blends as Matrices for Green Composites Manufacturing 生物基环氧树脂/腰果酚共混物制备绿色复合材料及其热力学分析

IF 4.7 3区工程技术

Journal of Polymers and the Environment Pub Date : 2025-01-18 DOI: 10.1007/s10924-024-03486-0

Lorena Saitta, Giuliana Rizzo, Claudio Tosto, Ignazio Blanco, Gianluca Cicala

{"title":"Development and Thermo-Mechanical Analysis of Bio-based Epoxy Resin/Cardanol Blends as Matrices for Green Composites Manufacturing","authors":"Lorena Saitta, Giuliana Rizzo, Claudio Tosto, Ignazio Blanco, Gianluca Cicala","doi":"10.1007/s10924-024-03486-0","DOIUrl":"10.1007/s10924-024-03486-0","url":null,"abstract":"<div><p>This study explores the development of recyclable and bio-based epoxy resin/cardanol blends with varying cardanol content (25, 50, and 75%<i>wt</i>) using a cleavable amine hardener to achieve full recyclability. This approach offers a significant advantage by addressing two critical aspects of the epoxy resin life cycle—feedstock selection and end-of-life recyclability. Blends with over 28% bio-based content were developed and their recyclability was demonstrated through chemical dissolution tests. The most performing formulations in terms of thermo-mechanical properties were identified through thermo-mechanical characterizations (such as TGA, DSC, DMA, and flexural tests). The obtained results showed that, by selecting the most suitable curing cycle and cardanol content, it was possible to achieve promising properties. In fact, glass transition temperatures (<span>(:{T}_{text{g}})</span>), ranging between 67 and 79 °C, were found enabling most of the common applications for these formulations. Flexural strength values reaching 77.3 ± 1.3 and 73.4 ± 1.5 MPa were found for formulations containing 25 and 50<i>%wt</i> cardanol, respectively. These formulations also exhibited good flexural modulus values (up to 2.50 ± 0.06 GPa) and stiffness, attributed to higher cross-linking densities. Generally, the findings of this study suggest the potential for developing eco-composites with good thermo-mechanical properties, high bio-based content, which are also fully-recyclable through a chemical approach, thus enhancing the overall sustainability of these materials. The latter class of materials is finding industrial applications in the automotive, sports and wind turbine fields, such as for the manufacturing of the first generation of fully-recyclable wind turbine blade.</p></div>","PeriodicalId":659,"journal":{"name":"Journal of Polymers and the Environment","volume":"33 3","pages":"1561 - 1584"},"PeriodicalIF":4.7,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis of Electrically Conductive Montmorillonite-Polypyrrole Composite Nanoparticles to Enhance the Antifouling, Cleaning Efficiency and Arsenic Separation in PLA Membranes 导电蒙脱石-聚吡咯复合纳米颗粒的合成提高PLA膜的防污、清洁效率和砷分离

IF 4.7 3区工程技术

Journal of Polymers and the Environment Pub Date : 2025-01-18 DOI: 10.1007/s10924-025-03489-5

Elham Shokri, Elham Effati, Kosar Behmaram

{"title":"Synthesis of Electrically Conductive Montmorillonite-Polypyrrole Composite Nanoparticles to Enhance the Antifouling, Cleaning Efficiency and Arsenic Separation in PLA Membranes","authors":"Elham Shokri, Elham Effati, Kosar Behmaram","doi":"10.1007/s10924-025-03489-5","DOIUrl":"10.1007/s10924-025-03489-5","url":null,"abstract":"<div><p>This study focuses on the synthesis of electrically conductive montmorillonite-polypyrrole (Mt-PPy) composite nanoparticles (NPs) to enhance antifouling properties and arsenate (As (V)) separation. Fourier transforms infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), X-ray diffraction (XRD), and scanning electron microscopy (SEM) confirmed the formation of Mt-PPy composite NPs. Results from porosity, mechanical property, and water uptake analysis of the fabricated membranes incorporating Mt-PPy demonstrated superior performance for the PLA-(Mt-PPy-0.5) membrane. The positive charge of PPy and Cl ions in its structure enhanced the As (V) removal efficiency, mainly in PLA-(Mt-PPy-0.5) membrane (~ 100%), where the concentration of Mt-PPy was higher and well-dispersed. An electro-conductive PLA-(Mt-PPy) membrane was employed as a cathode, and the impact of Mt-PPy concentration on the cleaning efficacy of the membranes examined. The findings highlight the potential of conductive membrane in improving antifouling performance. By applying an electric current, PLA-(Mt-PPy-0.5) membrane achieved highest flux recovery ratio (FRR) of approximately 91.3%, due to the stronger repulsive force between the membrane and humic acid (HA). This process also increased As (V) desorption, enabling effective use of the membrane in multiple As (V) adsorption-desorption cycles.</p></div>","PeriodicalId":659,"journal":{"name":"Journal of Polymers and the Environment","volume":"33 3","pages":"1528 - 1541"},"PeriodicalIF":4.7,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation and Properties of Bionanocomposites Based on Aminated Sucrose-Cured Epoxy Resins and Carboxymethyl Cellulose Nanofibers 基于氨基化蔗糖固化环氧树脂和羧甲基纤维素纳米纤维的仿生复合材料的制备与性能

IF 4.7 3区工程技术

Journal of Polymers and the Environment Pub Date : 2025-01-18 DOI: 10.1007/s10924-025-03490-y

Jun Watanabe, Kaito Sugane, Mitsuhiro Shibata

{"title":"Preparation and Properties of Bionanocomposites Based on Aminated Sucrose-Cured Epoxy Resins and Carboxymethyl Cellulose Nanofibers","authors":"Jun Watanabe, Kaito Sugane, Mitsuhiro Shibata","doi":"10.1007/s10924-025-03490-y","DOIUrl":"10.1007/s10924-025-03490-y","url":null,"abstract":"<div><p>Bionanocomposites composed of bio-based epoxy resins and cellulose nanofibers are attracting extensive attention as sustainable materials contributing to carbon neutrality and reduced dependence on oil resources. In this study, as a water-soluble epoxy resin system, a mixture of bio-based epoxy resin [polyglycerol polyglycidyl ether (PGPE)] and petroleum-based flexible epoxy resin [polyethylene glycol diglycidyl ether (PEGDGE)] at an epoxy ratio of 2:1 was used. As a bio-based and water-soluble epoxy hardener, 3-[(2-aminoethyl)thio]propyl-etherified sucrose (NSCR) with an amine functionality of ca. 7, which was synthesized by the thiol-ene reaction of cysteamine hydrochloride and allyl-etherified sucrose, was used. A bio-based epoxy network (BEN) was prepared by drying and curing an aqueous solution of PGPE, PEGDGE, and NSCR with an epoxy/NH<sub>2</sub> ratio of 1/1. Bionanocomposites of BEN and carboxymethyl cellulose nanofibers (CMCNFs) were successfully prepared by directly mixing PGPE, PEGDGE, NSCR, and CMCNF in water without any solvent-exchange of the cellulosic nanofibers, which is necessary in conventional methods. The BEN/CMCNF bionanocomposites had excellent fiber dispersibility, and the tensile strength and modulus increased with increasing CMCNF content owing to the excellent reinforcement effect of the CMCNFs.</p></div>","PeriodicalId":659,"journal":{"name":"Journal of Polymers and the Environment","volume":"33 5","pages":"2125 - 2137"},"PeriodicalIF":4.7,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10924-025-03490-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809279","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

Assessment of Four Artificial Methods for Aging Plastic Mulch Films According to Efficiency, Rate, and Similarity to Natural Field-Aged Plastics 四种人工老化地膜方法的效率、速率及与天然田间老化塑料的相似度评价

IF 4.7 3区工程技术

Journal of Polymers and the Environment Pub Date : 2025-01-18 DOI: 10.1007/s10924-024-03481-5

Martine Graf, Michaela K. Reay, Athanasios Dimitriou, David R. Chadwick, Davey L. Jones

{"title":"Assessment of Four Artificial Methods for Aging Plastic Mulch Films According to Efficiency, Rate, and Similarity to Natural Field-Aged Plastics","authors":"Martine Graf, Michaela K. Reay, Athanasios Dimitriou, David R. Chadwick, Davey L. Jones","doi":"10.1007/s10924-024-03481-5","DOIUrl":"10.1007/s10924-024-03481-5","url":null,"abstract":"<div><p>Artificial degradation is often used to recreate and accelerate the natural aging of plastic for small-scaled simulation experiments assessing their environmental impact. However, current artificial aging methods are rarely compared against reference materials or validated using field-aged samples, creating uncertainties when extrapolating results to naturally aged plastics, making it difficult to place findings in an environmentally applicable context. Therefore, here we compared four accessible, cost-effective, and easily replicable methods (heat, UVA, and UVC irradiance at two intensities) to produce artificially degraded materials. The artificial aging methods were assessed over a duration of 5 months against degradation rate, efficiency, and similarity to field-aged samples of conventional and biodegradable plastic mulch film over a 6-month field exposure period. We utilised attenuated total reflectance-Fourier transform infrared spectroscopy to calculate the carbonyl index and measure chemical changes of the mulch film surface, as well as differential scanning calorimetry and thermogravimetric analysis. Physical changes were assessed by thickness and surface roughness measurements. We found that UVA was the most suitable and realistic artificial degradation method at a medium rate, whilst UVC is recommended for rapid degradation without the need to simulate realistic changes, and heat for processing large volumes of samples without a requirement for realistic degradation over a prolonged time period. However, the methods compared in this study yielded differential results depending on polymer type and parameter of interest. We therefore recommend establishing the degradation aim, identifying the spectral region of interest, and accounting for different polymer types to select the most appropriate method.</p></div>","PeriodicalId":659,"journal":{"name":"Journal of Polymers and the Environment","volume":"33 3","pages":"1542 - 1560"},"PeriodicalIF":4.7,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10924-024-03481-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423363","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

Improving rPET/PBT Bead Foam Structure via Chain Extender Modification and Blend Variance 通过扩链剂改性和共混变化改善rPET/PBT泡沫珠结构

IF 4.7 3区工程技术

Journal of Polymers and the Environment Pub Date : 2025-01-11 DOI: 10.1007/s10924-024-03360-z

Andreas Himmelsbach, Yavuz Akdevelioglu, Mohammadreza Nofar, Holger Ruckdäschel

{"title":"Improving rPET/PBT Bead Foam Structure via Chain Extender Modification and Blend Variance","authors":"Andreas Himmelsbach, Yavuz Akdevelioglu, Mohammadreza Nofar, Holger Ruckdäschel","doi":"10.1007/s10924-024-03360-z","DOIUrl":"10.1007/s10924-024-03360-z","url":null,"abstract":"<div><p>In this study, the influence of the chain extender (CE) and the blend ratio on the bead foam extrusion of rPET/PBT is investigated. The shape and density of the bead foams were analyzed during extrusion using a camera scanner while the morphology of the foam was investigated using scanning electron microscopy (SEM). Melt strength and thermal behavior were also investigated with Rheotens and differential scanning calorimetry (DSC), respectively. Both chain extender and blend ratio had pronounced effect on the foaming behavior. Significant improvements were observed up to 0.8 wt.-% CE in rPET50PBT50, which achieved an average cell size of 107 ± 17 μm and a density of 182 kg/m³, representing a weight reduction of 86.4% compared to the bulk material. In addition, rPET40PBT60 with 0.8 wt.-% CE gave an average cell size of 108 ± 23 μm and a foam density of 170 kg/m³, with a comparable cell size distribution. After CE modification, the melt strength of rPET-dominant blends obtained higher values but a strong decrease in elongation was observed. In contrast, the CE-modified rPET40PBT60 and rPET30PBT70 blends exhibited much higher elongation with a moderate increase in melt strength which resulted in better bead and foam morphologies. DSC analysis revealed lowest crystallization temperature in rPET50PBT50 with deviations shifting towards higher temperatures. All blends except rPET70PBT30 shows double melting peak formation, with higher rPET formulations also exhibiting cold crystallization. These findings provide crucial insight for development of rPET/PBT foams by controlling the blend and CE composition, which is critical for achieving temperature-resistant bead foams with improved structural integrity.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":659,"journal":{"name":"Journal of Polymers and the Environment","volume":"33 3","pages":"1517 - 1527"},"PeriodicalIF":4.7,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10924-024-03360-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423244","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

Room-Temperature Synthesis of pH-Responsive MOF Nanocarriers for Targeted Drug Delivery in Cancer Therapy 室温合成ph响应MOF纳米载体用于肿瘤靶向药物递送

IF 4.7 3区工程技术

Journal of Polymers and the Environment Pub Date : 2025-01-11 DOI: 10.1007/s10924-025-03496-6

Amir Kazemi, Mohammad Hossein Afshari, Hasan Baesmat, Saber Keshavarz, Fateme Zeinali, Shahla Zahiri, Elahe Torabi, Faranak Manteghi, Sohrab Rohani

{"title":"Room-Temperature Synthesis of pH-Responsive MOF Nanocarriers for Targeted Drug Delivery in Cancer Therapy","authors":"Amir Kazemi, Mohammad Hossein Afshari, Hasan Baesmat, Saber Keshavarz, Fateme Zeinali, Shahla Zahiri, Elahe Torabi, Faranak Manteghi, Sohrab Rohani","doi":"10.1007/s10924-025-03496-6","DOIUrl":"10.1007/s10924-025-03496-6","url":null,"abstract":"<div><p>The synthesis of nanoscale metal-organic frameworks (MOFs) is emerging as a promising method for targeted drug delivery in cancer therapy. In this study, unlike conventional solvothermal methods that require high temperatures, room-temperature synthesis of two Zn-MOF-74 variants was achieved using zinc nitrate and zinc acetate with triethylamine (TEA). The use of different anions allows precise control over the morphology and particle size of the MOF, optimizing drug loading in nanocarriers. Drug loading and release were evaluated using 5-fluorouracil (5-FU) as a model drug in both aqueous and ethanolic environments. The results showed that Zn-MOF-74 prepared with zinc acetate (R<sub>A</sub>-MOF-74) at a 1:1 drug-to-nanocarrier ratio in ethanol exhibited superior drug adsorption and release characteristics. To enhance biocompatibility and controlled release, R<sub>A</sub>-MOF-74 nanocarriers were coated with two biodegradable polymers, sodium alginate (ALG) and polydopamine (PDA), to improve stability at low pH and enhance release control. The release profiles of 5-FU from R<sub>A</sub>-MOF-74 and its coated samples (PDA and ALG) were evaluated at different pH levels. In uncoated R<sub>A</sub>-MOF-74, drug release at pH 7.4 and 8 was 48.4% and 59.1%, respectively, reaching 100% at pH 1.5. For the coated samples, 5-FU@R<sub>A</sub>-MOF-74/ALG released 19.8% and 45.9% at pH 1.5 and 8, respectively, while 5-FU@R<sub>A</sub>-MOF-74/PDA showed 25.2% and 40.8% release at pH 7.4 and 5.5. These results clearly highlight pH-sensitive release and the role of biocompatible coatings in enhancing controlled drug release, demonstrating the potential of Zn-MOF-74 with controlled morphology for pH-responsive delivery of 5-FU in cancer therapy, paving the way for future in vivo applications.</p></div>","PeriodicalId":659,"journal":{"name":"Journal of Polymers and the Environment","volume":"33 3","pages":"1505 - 1516"},"PeriodicalIF":4.7,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Feasibility Assessment of BIO-PUR Composites for Offshore Applications 近海应用 BIO-PUR 复合材料的可行性评估

IF 4.7 3区工程技术

Journal of Polymers and the Environment Pub Date : 2025-01-09 DOI: 10.1007/s10924-024-03485-1

Oihane Echeverria-Altuna, Pablo Benguria, Ainara Saralegi, Isabel Harismendy, Arantxa Eceiza

{"title":"Feasibility Assessment of BIO-PUR Composites for Offshore Applications","authors":"Oihane Echeverria-Altuna, Pablo Benguria, Ainara Saralegi, Isabel Harismendy, Arantxa Eceiza","doi":"10.1007/s10924-024-03485-1","DOIUrl":"10.1007/s10924-024-03485-1","url":null,"abstract":"<div><p>The quest for sustainable materials in offshore renewable energy is critical for mitigating the environmental concerns associated with the use of conventional composites. This study explores the potential of vegetable oil-based polyurethanes (BIO-PUR) as a sustainable alternative to petrochemical-based resins in offshore structural applications. BIO-PUR composites were fabricated, mechanically characterized, and subjected to real-world marine environments in the HarshLab floating laboratory, with exposure durations of 3 and 5 months in both atmospheric and immersion zones. Comprehensive testing, including dynamic mechanical analysis (DMA), thermogravimetric analysis (TGA), Fourier-transform infrared spectroscopy (FTIR), and interlaminar shear strength (ILSS) assessments, showed no significant degradation in the mechanical, thermal, or chemical properties of the composites. Notably, water absorption remained minimal, and the glass transition temperature of the material (T<sub>g</sub>) and interlaminar strength remained unchanged after exposure, highlighting the exceptional durability of BIO-PUR in harsh marine environments. These results suggest that BIO-PUR composites could not only meet but potentially surpass the performance requirements for long-term offshore applications, offering a highly promising eco-friendly alternative to traditional composites. This study provides a foundation for future research into the long-term viability of biobased materials in offshore energy systems, paving the way for more sustainable solutions in renewable energy infrastructures.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":659,"journal":{"name":"Journal of Polymers and the Environment","volume":"33 3","pages":"1491 - 1504"},"PeriodicalIF":4.7,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10924-024-03485-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423439","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

Animal and Vegetable Proteins: Applications as Film and Coating in Food Industry 动植物蛋白：在食品工业中作为薄膜和涂层的应用

IF 4.7 3区工程技术

Journal of Polymers and the Environment Pub Date : 2025-01-09 DOI: 10.1007/s10924-025-03487-7

Behzad Mohammadi, Sajad Pirsa, Mitra Mahmudi

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