Polymers最新文献_第9页

Experimental Investigations into the Deformation and Failure of Polyurea-Coated Steel Plates Experiencing Localized Air Blast Loads. 局部空气爆炸载荷作用下聚氨酯涂层钢板变形与破坏的实验研究。

IF 4.9 3区工程技术

Polymers Pub Date : 2025-09-14 DOI: 10.3390/polym17182481

Dian Li, Zichun He, Mao Li

{"title":"Experimental Investigations into the Deformation and Failure of Polyurea-Coated Steel Plates Experiencing Localized Air Blast Loads.","authors":"Dian Li, Zichun He, Mao Li","doi":"10.3390/polym17182481","DOIUrl":"10.3390/polym17182481","url":null,"abstract":"Experimental investigations were conducted on the polyurea-coated steel plates experiencing localized air blast loads. The blast distance and polyurea coating position on the deformation and failure modes of the polyurea-coated steel plates were compared with those of homogeneous steel plates. The dynamic response failure and stress wave propagation characteristics of the polyurea-coated steel plates were studied. The results showed that under the localized air blast loads, the polyurea-coated steel plates demonstrated three failure modes: large flexural deformation, flexural deformation plus plugging breach, and flexural deformation plus plugging breach plus petal-like cracking. Under the same blast distance and surface density, the deformation and failure modes of the homogeneous steel plate were the same as those of the steel plate or polyurea-coated steel plate, but significantly different from those of the polyurea-coated steel plate. Coating polyurea on the non-blast-facing surface of steel plates exhibited better air blast resistance than coating polyurea on the blast-facing surface. Still, the air blast resistance of the polyurea-coated steel plate was insignificant compared to the homogeneous steel plates of the same weight.","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 18","pages":""},"PeriodicalIF":4.9,"publicationDate":"2025-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12473507/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145177919","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

Silicone Films Modified with Ethylene Glycol Dicyclopentenyl Ether Acrylate for Antimicrobial Silver Loading. 乙二醇二环戊烯醚丙烯酸酯改性有机硅膜的抗菌载银性能。

IF 4.9 3区工程技术

Polymers Pub Date : 2025-09-14 DOI: 10.3390/polym17182482

Orlando Padilla, Miguel S Pérez-Garibay, Alejandro Camacho-Cruz, Emilio Bucio

引用次数: 0

A Systematic Bibliometric Review Analysis of Research on the Use of Waste Rubber Tyres in Building and Construction Materials and Their Applications. 废橡胶轮胎在建筑材料中的利用及其应用研究的系统文献计量学综述分析。

IF 4.9 3区工程技术

Polymers Pub Date : 2025-09-13 DOI: 10.3390/polym17182480

Rosnery Castillo, Aleix Alva, Oriol París-Viviana, Montserrat Bosch

{"title":"A Systematic Bibliometric Review Analysis of Research on the Use of Waste Rubber Tyres in Building and Construction Materials and Their Applications.","authors":"Rosnery Castillo, Aleix Alva, Oriol París-Viviana, Montserrat Bosch","doi":"10.3390/polym17182480","DOIUrl":"10.3390/polym17182480","url":null,"abstract":"This systematic bibliometric review, conducted in accordance with the PRISMA methodology, examines the literature on waste rubber tyres (WRTs) and their applications, measuring correlations between several standard metrics and identifying gaps that may stimulate new research. Using a thirty-year database from Scopus, both numerical and graphical results highlight key aspects, including geographic distribution, journal analysis, keywords, and three main research categories: environment, application, and property. Publications have grown exponentially at a rate of 17% per year. Research is concentrated in India and China, with Africa and Central America lagging behind. The United States leads in impact, while publication volume correlates moderately with gross domestic product (GDP), but negatively with international collaboration. Notably, several leading countries in automobile and tyre production have a limited academic presence in WRT research. The most prominent studies focus on material development; however, there remains a lack of practical applications for these materials. Recent trends show growing interest in WRTs within engineering, materials science, and environmental science, with multidisciplinary approaches emerging. A keyword analysis indicates a steady evolution in end-of-life tyres (ELT) research over recent years. In environmental studies, interest in ELT recycling methods has grown, though aspects such as toxicity, life cycle analysis, and leaching remain relatively unexplored. In terms of applications, research is primarily focused on pavements, while areas such as facades, blocks, and roofs remain under-studied. Finally, in material property studies, most research addresses compressive strength, while critical areas such as fire resistance, impact resistance, and thermal testing offer promising avenues for future research.","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 18","pages":""},"PeriodicalIF":4.9,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12473547/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145177810","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

A Novel Cyclized Polyacrylonitrile Binder Strategy for Efficient Oxygen Evolution Reaction Catalysts. 一种新型环化聚丙烯腈粘合剂策略作为高效析氧反应催化剂。

IF 4.9 3区工程技术

Polymers Pub Date : 2025-09-13 DOI: 10.3390/polym17182477

Yifan Gu, Xiaomin Yin, Xinrong Li, Huili Ding, Xiaojie Zhang, Yi Feng

{"title":"A Novel Cyclized Polyacrylonitrile Binder Strategy for Efficient Oxygen Evolution Reaction Catalysts.","authors":"Yifan Gu, Xiaomin Yin, Xinrong Li, Huili Ding, Xiaojie Zhang, Yi Feng","doi":"10.3390/polym17182477","DOIUrl":"10.3390/polym17182477","url":null,"abstract":"In alkaline water electrolysis, conventional polymer binders like Nafion suffer from poor hydroxide conductivity and inadequate interfacial properties. Herein, a thermally cyclized polyacrylonitrile (CPAN) binder system with a conjugated ladder structure is introduced. The CPAN binders are synthesized by controlled thermal treatment under various temperatures, among which CPAN-400 demonstrates the optimal 57.03% pyridinic N content, provides π-conjugated pathways for enhanced electronic conductivity, and indicates hierarchically porous electrode architectures. The NiFe/CPAN-400 electrode achieves enhanced oxygen evolution performance with an overpotential of 354 mV at 100 mA cm-2, which is 153 mV and 103 mV lower than NiFe-Nafion and NiFe-PAN, respectively. This enhancement results from synergistic effects, including an electrochemically active surface area increased 2.3-fold, improved electrolyte wettability, and optimized charge transfer kinetics. The pyridinic nitrogen-enriched structure also facilitates a rate-determining step transition from charge transfer to *OOH formation, with a Tafel slope of 59.9 mV dec-1. This work establishes thermally induced polymer cyclization as a versatile strategy for advanced binder developments.","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 18","pages":""},"PeriodicalIF":4.9,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12473700/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145177775","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

Air-Assisted Sprayed Flexible Cellulose Acetate/Chitosan Materials for Food Packaging. 食品包装用气助喷涂柔性醋酸纤维素/壳聚糖材料。

IF 4.9 3区工程技术

Polymers Pub Date : 2025-09-13 DOI: 10.3390/polym17182479

Nasrin Moshfeghi Far, Ana Kramar, Javier González-Benito

{"title":"Air-Assisted Sprayed Flexible Cellulose Acetate/Chitosan Materials for Food Packaging.","authors":"Nasrin Moshfeghi Far, Ana Kramar, Javier González-Benito","doi":"10.3390/polym17182479","DOIUrl":"10.3390/polym17182479","url":null,"abstract":"Cellulose and chitin are the most abundant natural polymers, and their exploitation paves the way for sustainable materials and products. This work investigates the preparation of composites based on acetylated cellulose and partially deacetylated chitin, i.e., chitosan, using versatile and robust air-assisted solution spraying (AASS), a potential method for preparing materials both in situ and ex situ. These materials, in the form of films, despite being prepared from high-molecular-weight and rigid biopolymers, show high flexibility (Young's moduli below 1 GPa), outstanding mechanical properties (tensile strengths above 19 MPa and strain at failure higher than 2%), and bioactivity towards E. coli. The unprecedented flexibility, obtained without the use of any plasticizer or by casting with humidity control, is a direct consequence of the specific film morphology, whereby films are constituted from merging droplets. Depending on the solution properties (viscosity, surface tension), various droplet sizes are obtained, thus influencing the roughness and indirectly the wettability. Wettability analysis towards water and oil revealed higher contact angles towards both fluids as the content of chitosan increases in the composite what directly impacts packaging applications by better protecting the food. Besides this, higher chitosan content in the composite (7.5% w/w) enabled bioactivity against E. coli, where colony development was inhibited on the film surface compared with the neat cellulose acetate. This study shows a very high potential for AASS for obtaining uniform thin flexible films for food packaging applications, allowing faster drying and lower energy consumption than other film-forming techniques.","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 18","pages":""},"PeriodicalIF":4.9,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12473453/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145177825","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

Extrudability and Mechanical Properties of Wood-Sodium Silicate Composites with Hemp Fiber Reinforcement for Additive Manufacturing. 麻纤维增强木-硅酸钠复合材料增材制造的挤压性能和力学性能。

IF 4.9 3区工程技术

Polymers Pub Date : 2025-09-13 DOI: 10.3390/polym17182478

Nagendra G Tanikella, Alexandra M Lehman-Chong, Armando G McDonald, Michael R Maughan

{"title":"Extrudability and Mechanical Properties of Wood-Sodium Silicate Composites with Hemp Fiber Reinforcement for Additive Manufacturing.","authors":"Nagendra G Tanikella, Alexandra M Lehman-Chong, Armando G McDonald, Michael R Maughan","doi":"10.3390/polym17182478","DOIUrl":"10.3390/polym17182478","url":null,"abstract":"This study investigates the potential of hemp fiber reinforcement in wood-sodium silicate composites for additive manufacturing. It focuses on the impact of hemp fiber length and content on the rheological, flexural, compression properties, and extrudability of the composite. Composites contained varying amounts of sodium silicate (45, 50, 55 wt%) and hemp fibers of varying lengths (1, 3, 5 mm) and amounts (2.5, 5, 10 wt%) along with wood fibers sifted through a 40-mesh sieve. The study shows that higher sodium silicate content significantly increases viscosity while reducing the motor power needed to extrude the composite. Hemp fiber amount positively affects flexural and compression strength, increasing by 31.2% and 35.6%, respectively, with 5 wt% hemp fiber. This improvement in mechanical properties significantly increases the thermoset-based composite's potential for various applications. This study also demonstrates for the first time, the feasibility of using the hemp fiber-reinforced wood-sodium silicate composite for additive manufacturing by successfully depositing a multi-layer sample print and determining its bending strength.","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 18","pages":""},"PeriodicalIF":4.9,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12473866/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145177940","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

Systematic Characterization and Property Enhancement of Recycled PE Flexible Film Packaging. 再生聚乙烯软膜包装的系统表征及性能增强。

IF 4.9 3区工程技术

Polymers Pub Date : 2025-09-13 DOI: 10.3390/polym17182475

Johanna Langwieser, Parvin Naderi, Joerg Fischer

{"title":"Systematic Characterization and Property Enhancement of Recycled PE Flexible Film Packaging.","authors":"Johanna Langwieser, Parvin Naderi, Joerg Fischer","doi":"10.3390/polym17182475","DOIUrl":"10.3390/polym17182475","url":null,"abstract":"The production of plastic recyclates is becoming an increasingly feasible and common practice within the industry. Nevertheless, these materials are frequently downcycled for use in applications of reduced value. To bridge the gap between recyclate properties and end-use requirements in flexible packaging, this study investigates the systematic blending of three distinct post-consumer polyethylene (PE) flexible film packaging waste streams with virgin PE materials (low-density and linear low-density). A comprehensive characterization using melt mass-flow rate, oxidation onset temperature, transparency, tensile properties, and puncture properties was conducted on the modified recyclates. Additionally, three commercially available polyethylene-based recyclates and five commercial products containing these recyclates were investigated. The study employs a systematic approach to evaluate the properties of both lab-created and commercial recyclates, as well as those of commercially available flexible film packaging. In light of these findings, recommendations are put forth for the targeted applicability of the recyclates. Results show that key mechanical and optical properties improve with increasing virgin content, though in several cases, up to 80% recyclate content still met or exceeded property requirements for target applications. By enhancing the properties of the recyclate and enabling precise classification for specific applications, this research proposes optimized material formulations and targeted market applications, thereby facilitating the expansion of the scope and value of recycled plastics in the circular economy.","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 18","pages":""},"PeriodicalIF":4.9,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12473179/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145177826","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

Bio-Based Silica-Reinforced Chitosan/Collagen Thermogels: Synthesis, Structure, and Rheological Behavior. 生物基二氧化硅增强壳聚糖/胶原热凝胶：合成、结构和流变行为。

IF 4.9 3区工程技术

Polymers Pub Date : 2025-09-13 DOI: 10.3390/polym17182476

Amakorn Poommoon, Piyanut Nookong, Santamon Pengoubol, Panjaporn Wongwithayakool

{"title":"Bio-Based Silica-Reinforced Chitosan/Collagen Thermogels: Synthesis, Structure, and Rheological Behavior.","authors":"Amakorn Poommoon, Piyanut Nookong, Santamon Pengoubol, Panjaporn Wongwithayakool","doi":"10.3390/polym17182476","DOIUrl":"10.3390/polym17182476","url":null,"abstract":"Silica-reinforced chitosan/collagen hydrogels are useful for biomedical applications. In this study, thermosensitive chitosan/collagen hydrogels were prepared with different amounts of rice husk ash-derived silica (RHA-Si). Fourier-transform infrared (FTIR) spectroscopy was used to analyze the chemical structure. Results showed that adding RHA-Si did not change the main chemical groups but caused slight shifts, indicating physical interactions. Micro-Computed Tomography (Micro-CT) revealed that RHA-Si altered the shape and size of the pores in the hydrogel. The pore structure became more spherical at certain RHA-Si levels, but not consistently. Rheological tests showed that increasing RHA-Si made the hydrogel stiffer and reduced the gelation time. However, the hydrogel weakened under high strain due to broken physical bonds. Compression tests indicated that low RHA-Si (1% w/v) improved the hydrogel's strength during small deformations. In contrast, the hydrogel was less resistant to compression at higher RHA-Si levels (2-3% w/v). In summary, adding RHA-Si can improve the structure and strength of chitosan/collagen hydrogels, but excessive RHA-Si may reduce flexibility. The RHA-Si content should be adjusted to match the intended application of the hydrogel.","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 18","pages":""},"PeriodicalIF":4.9,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12473446/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145177594","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 Regeneration-Cycle Mechanism of Cu-BTC@MWS Composites Following Mercury Adsorption. Cu-BTC@MWS复合材料汞吸附再生循环机理研究。

IF 4.9 3区工程技术

Polymers Pub Date : 2025-09-12 DOI: 10.3390/polym17182474

Feng Wang, Yue Yu

{"title":"Study on the Regeneration-Cycle Mechanism of Cu-BTC@MWS Composites Following Mercury Adsorption.","authors":"Feng Wang, Yue Yu","doi":"10.3390/polym17182474","DOIUrl":"10.3390/polym17182474","url":null,"abstract":"Coal-fired power plants, as the largest source of human-made mercury emissions, often lack specialized mercury emission control devices. Therefore, developing cost-effective adsorbents and studying their regeneration properties are highly important for mercury removal from flue gas. In this study, the regeneration efficiency and stability of a composite material made from polymetallic Fe/Cu-doped modified biochar combined with the MOF material Cu-BTC were investigated. Based on the analysis of microscopic characteristics, the molecular structure of the regenerated composites was modeled, and the adsorption and regeneration process of Hg0 on their surface was simulated using density functional theory. This helped uncover the underlying mechanisms of mercury removal and regeneration. The results indicate that the optimal regeneration temperature and atmosphere were 350 °C and 5% O2, resulting in the formation of a derived carbon material. The regeneration efficiency reached 92% of that of the original mercury adsorption capacity, and over 80% efficiency was maintained after 10 regeneration cycles. The regenerated samples adsorbed Hg0 through the combined action of surface metal oxides, the metal element Cu, and oxygen-containing functional groups.","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 18","pages":""},"PeriodicalIF":4.9,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12473158/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145177862","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

Bio-Based Aqueous Dispersions Based on Unsaturated PLA Polymers for Barrier Packaging Applications. 基于不饱和聚乳酸聚合物的生物基水分散体在屏障包装中的应用。

IF 4.9 3区工程技术

Polymers Pub Date : 2025-09-12 DOI: 10.3390/polym17182467

Roosa Hämäläinen, Pauliina Kivinen, Rajesh Koppolu, Eetu Nissinen, Adina Anghelescu-Hakala

{"title":"Bio-Based Aqueous Dispersions Based on Unsaturated PLA Polymers for Barrier Packaging Applications.","authors":"Roosa Hämäläinen, Pauliina Kivinen, Rajesh Koppolu, Eetu Nissinen, Adina Anghelescu-Hakala","doi":"10.3390/polym17182467","DOIUrl":"10.3390/polym17182467","url":null,"abstract":"The growing demand for sustainable packaging materials highlights the need for bio-based alternatives to fossil-derived polymers, particularly in barrier applications where reduced environmental impact and recyclability are critical. Poly(lactic acid) is a promising candidate due to its renewable origin and biodegradability, yet its application in aqueous dispersion coatings remains underdeveloped. In this study, copolymers were synthesized from L-(+)-lactic acid, itaconic acid, and 1,4-/2,3-butanediol via polycondensation, and a solvent-free thermomechanical method was used to prepare aqueous dispersions from the produced copolymers. The main objective of this study was to identify an optimal composition for the copolymer and dispersion to achieve small and uniformly sized dispersion particles while also assessing the scalability of the process from laboratory to pilot production. The smallest dispersion particles and most uniform size distribution were achieved with a copolymer that had an Mn close to the average (10,180 g mol-1) and a low Tg (-1.4 °C). The grade and dosage of the dispersion stabilizer significantly influenced the particle size and particle size distribution. The process scale-up, including polymer production at pilot scale and dispersion preparation at bench scale, was successfully demonstrated. The water vapor barrier properties of the coated dispersions were promising (<10 g/m2 at 23 °C/50% RH), supporting the potential of aqueous PLA-based dispersions as sustainable barrier coatings.","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 18","pages":""},"PeriodicalIF":4.9,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12473213/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145177332","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