Polymer最新文献

{"title":"Design of photocurable 3D printed composite hydrogel scaffolds for osteochondral repair","authors":"Chengdong Zhen ,&nbsp;Fuyu Chen ,&nbsp;Heng Li ,&nbsp;Guimei Lin ,&nbsp;Fei Wang ,&nbsp;Bingtao Tang ,&nbsp;Yanbin Shi ,&nbsp;Xuelin Li","doi":"10.1016/j.polymer.2025.128665","DOIUrl":"10.1016/j.polymer.2025.128665","url":null,"abstract":"<div><div>Current osteochondral repair strategies (e.g., autologous transplantation, microfracture) face challenges in balancing mechanical support with bioactive microenvironment construction, as the resulting fibrocartilage fails to sustain long-term joint functionality. Although hydrogel scaffolds have garnered significant attention as promising alternatives due to their cartilage-mimetic properties, critical bottlenecks such as insufficient mechanical strength, conflicting porosity-permeability trade-offs, and the absence of multiscale mechano-biological coupling design methodologies continue to hinder clinical translation. This study proposes a novel bioinspired gradient photocurable 3D-printed composite scaffold design strategy. By synergistically optimizing methacrylated gelatin (GelMA) and poly(ethylene glycol) diacrylate (PEGDA) at a cross-scale ratio (5 wt% GelMA + 10 wt% PEGDA) and implementing a hierarchical composite architecture with externally supportive units and internally permeable units, we achieved concurrent enhancements in compressive strength (5.42 kPa), permeability (12.63 × 10−9 m2), and biomicroenvironment adaptability. Through digital light processing (DLP)-based 3D printing, fluid dynamics simulations, and in vitro experiments, composite scaffold b demonstrated a 2.15-fold increase in compressive strength over homogeneous scaffold a, a 3.6-fold and 2.07-fold permeability improvement compared to support-dense homogeneous scaffolds b and c, respectively, and &gt;95 % viability in co-cultured rabbit bone marrow mesenchymal stem cells. This stratified design decouples the mechanical reinforcement function of rigid outer units from the directional nutrient transport capacity of the porous core, effectively overcoming the \"zero-sum\" conflict between mechanical robustness and metabolic exchange in conventional homogeneous scaffolds.</div><div>This work establishes a design paradigm for osteochondral repair scaffolds that integrates mechanical adaptability, biofunctionalization, and manufacturability, offering new insights into multiscale synergistic strategies for precisely regulating implantable microenvironments.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"333 ","pages":"Article 128665"},"PeriodicalIF":4.1,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144252721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermally rearranged polybenzoxazole/polyimide binders for SiOx/C anodes in lithium-ion batteries","authors":"Xingshuai Zhang ,&nbsp;Kewei Li ,&nbsp;Zejun Zheng ,&nbsp;Yongsheng Hao ,&nbsp;Zhen Wang ,&nbsp;Jingling Yan ,&nbsp;Tianyue Zheng","doi":"10.1016/j.polymer.2025.128664","DOIUrl":"10.1016/j.polymer.2025.128664","url":null,"abstract":"<div><div>The microstructures of polymer binders significantly affect the lithium-ion battery (LIB) performance. In this work, a strategy combining chemical structure modification and microporosity engineering was employed to design polymer binders for SiO_x/C anodes. A polyimide with <em>ortho</em>-hydroxyl groups (PIHB) was synthesized and thermally treated at 400–500 °C (PIHB-T, T for temperatures), during which the structural evolution was systematically investigated. At optimal temperature (450 °C), thermal rearrangement (TR) led to the formation of benzoxazole structures and the release of CO₂, creating multiscale pores within the polymers and the resulting electrodes. Nevertheless, either lower (400 °C) or higher (500 °C) temperature resulted in inferior battery performance, due low TR conversion or possible decomposition, respectively. Among them, PIHB-450 showed the best electrolyte wettability and highest lithium-ion conductivity, while maintaining moderate mechanical properties. Consequently, the PIHB-450 electrode exhibited a capacity retention of 72 % after 100 cycles, achieving over 1000 mAh/g and 2.5 mAh/cm². This work provided a novel strategy to design polymer binders with special microstructures for silicon-based anode materials in LIBs.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"333 ","pages":"Article 128664"},"PeriodicalIF":4.1,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144252692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An application of pressure-induced flow with no constraint direction on improvement of mechanical properties for isotactic polypropylene/propylene-ethylene copolymer blends","authors":"Chaoran Hua ,&nbsp;Wanyu Wang ,&nbsp;Ning Li,&nbsp;Jihan Luo,&nbsp;Xuehui Wang,&nbsp;Zhigang Wang","doi":"10.1016/j.polymer.2025.128663","DOIUrl":"10.1016/j.polymer.2025.128663","url":null,"abstract":"<div><div>Isotactic polypropylene (iPP) is one of the most widely used general-purpose plastics due to its excellent properties. However, the low impact strength limits its extensive application in the engineering field. Pressure-induced flow (PIF) processing, regarded as an effective and economical technique for improving the mechanical property of polymer materials has been used to prepare iPP/propylene-ethylene copolymer (iPP/PEC) blends with 0, 5 and 20 wt% PEC contents, respectively. With assistance of the PIF processing at 120 °C with no constraint direction, the iPP/PEC 80/20 blend shows the highest notched Izod impact strength of 66 kJ/m², about 30 times of that for neat iPP (2.2 kJ/m²), and the tensile strength and Young<em>'</em>s modulus are simultaneously improved to 31 and 890 MPa, respectively. The measurement results from differential scanning calorimetry, scanning electron microscopy, small-angle X-ray scattering, wide-angle X-ray diffraction and dynamic mechanical analysis reveal the effects of the orientation degrees of the iPP crystalline lamellar stacks and the PEC phase domains, reductions in interparticle distance and crystal sizes on improving the impact and tensile strengths. The PIF processing with no constraint direction as reported in this work sounds a promising technique for preparing high-performance polymer blends.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"333 ","pages":"Article 128663"},"PeriodicalIF":4.1,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144238202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"AIE-activated polyhedral oligomeric silsesquioxanes materials for dual applications heavy metal ions detection and CO2 capture","authors":"Wensi Li ,&nbsp;Jiajia Ye ,&nbsp;Jingjing Liu ,&nbsp;Yufei Song ,&nbsp;Juan An ,&nbsp;Zhen Kong ,&nbsp;Jibin Song","doi":"10.1016/j.polymer.2025.128667","DOIUrl":"10.1016/j.polymer.2025.128667","url":null,"abstract":"<div><div>A novel porous fluorescent material based on polyhedral oligomeric silsesquioxane (POSS) functionalized with imidazole-selenone has been synthesized using a one-pot Povarov reaction. Comprehensive characterization reveals that the product of Polyhedral oligomeric silsesquioxane-Se1-triphenylamine which denoted as POSS-Se1-TPA exhibited exceptional thermal stability, fluorescence properties, and thermal stability, making it highly suitable for detection of heavy metal ions and CO₂ adsorption. The incorporation of imidazole selenone, quinoline structures, and triphenylamine groups has enabled POSS-Se1-TPA with multi-site binding, facilitating high sensitivity and selectivity towards Fe³⁺ and Cu²⁺ ions. Furthermore, CO₂ adsorption studies have revealed its capacity of 28 mmol/g at 700 mmHg, attributed to microporous structures and active functional groups that promote physisorption and chemisorption mechanisms. POSS-Se1-TPA, as a dual-function material has provided an innovative platform for environmental monitoring, including efficient metal ion detection and gas adsorption, and served as a model for designing advanced functional materials with versatile applications in sensing, bioimaging, and environmental remediation.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"333 ","pages":"Article 128667"},"PeriodicalIF":4.1,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144252691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New adsorbent, polymelamine crosslinked with s-trioxane for selective adsorption of precious metal.","authors":"Reni Anggraini,&nbsp;Gehui Pang,&nbsp;Shintaro Morisada,&nbsp;Hidetaka Kawakita,&nbsp;Keisuke Ohto","doi":"10.1016/j.polymer.2025.128666","DOIUrl":"10.1016/j.polymer.2025.128666","url":null,"abstract":"<div><div>Precious metal preservation is important to produce advanced materials. However, the need is not directly proportional to its availability. Various methods are being developed to obtain precious metals from these sources. The concern is the need for more effective and selective separation reagent preparation. It has been reported that amino groups show a high affinity for precious metals. Melamine (2,4,6-triamino-1,3,5-triazine) is a hydrophilic triazine derivative with three amino groups. In this study, melamine as a monomer reacted with s-trioxane as a crosslinker, and polymelamine was successfully synthesized as a water-insoluble adsorbent. The obtained adsorbent was confirmed by solubility test, UV–Vis, elemental analysis, Fourier transform infrared (FT-IR), and energy dispersive X-ray (EDX) spectroscopies. Polymelamine showed excellent adsorptive ability for precious metals. The maximum loading capacities for Au(III), Pt(IV), and Pd(II) on the adsorbent were 2.38, 1.67, and 2.20 mol kg⁻¹, respectively. In addition, polymelamine has excellent selectivity toward precious metals compared to base metals. Based on the SEM-EDX results, gold and other precious metals were adsorbed as chloroanionic species. It was proposed that the stoichiometry of polymelamine unit toward metal ions was 1.7 : 1, 2.4 : 1, and 1.8 : 1 for Au(III), Pt(IV), and Pd(II), respectively. In summary, polymelamine with a simple synthesis method is one of the promising adsorbents for separating precious metals.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"333 ","pages":"Article 128666"},"PeriodicalIF":4.1,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144252638","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Interfacial delamination between semicrystalline polymers and filler materials by coarse-grained molecular dynamics simulations","authors":"Yuji Higuchi ,&nbsp;Yuta Hikima ,&nbsp;Naoto Kamiuchi ,&nbsp;Erica Uehara ,&nbsp;Yutaka Oya ,&nbsp;Go Yamamoto ,&nbsp;Keita Sakakibara","doi":"10.1016/j.polymer.2025.128539","DOIUrl":"10.1016/j.polymer.2025.128539","url":null,"abstract":"<div><div>Understanding the interfacial delamination between semicrystalline polymers and filler materials is essential for improving the mechanical properties of polymer composites. While interfacial delamination is affected by interfacial interactions and polymer crystallinity at the interface, experimental observations of polymer orientation and its evolution during deformation remain challenging. In this study, coarse-grained molecular dynamics simulations are conducted to model the stretching of lamellar-structured semicrystalline polyethylene on a filler surface to elucidate the effects of different orientation relationships and interfacial adsorption strengths on the delamination behavior. In the edge-on model, in which the polymer lamellae are oriented perpendicular to the filler surface, the polymer detaches readily under strain and voids grow perpendicular to the stretching direction. In the flat-on model, in which the polymer lamellae are oriented parallel to the filler surface, with an amorphous layer adjoining the surface, the polymer does not detach easily during stretching and voids grow parallel to the stretching direction. The stress in the edge-on model increases rapidly and peaks at a higher value than that in the flat-on model. These simulation results advance our understanding of molecular-scale deformation and fracture processes in semicrystalline polymer–filler composites.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"333 ","pages":"Article 128539"},"PeriodicalIF":4.1,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144237017","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Polymer extended-chain crystals: Preparation, formation mechanisms and performances","authors":"Na Li,&nbsp;Jia-Yao Chen,&nbsp;Tianyu Wu,&nbsp;Xiaoyu Meng,&nbsp;Qiong Zhou,&nbsp;Hai-Mu Ye","doi":"10.1016/j.polymer.2025.128656","DOIUrl":"10.1016/j.polymer.2025.128656","url":null,"abstract":"<div><div>Polymer extended-chain crystals (ECCs) have garnered significant attention due to their exceptional thermodynamic stability, high melting temperatures, and superior mechanical and functional properties compared to folded-chain crystals (FCCs). This review systematically examines the preparation strategies, formation mechanisms, and performance characteristics of ECCs across various polymer systems. Key methodologies for ECC fabrication include crystallization during polymerization, high-pressure and high-temperature crystallization, shear-assisted crystallization, crystallization in Langmuir-Blodgett film. These approaches address critical challenges such as chain entanglement and entropy penalties, enabling the alignment of polymer chains into extended conformations. Notably, ECCs exhibit enhanced mechanical strength (<em>e.g.</em>, ultrahigh-modulus polyethylene fibers), solvent resistance (<em>e.g.</em>, poly(butylene succinate) ECC films), and electronic functionalities (<em>e.g.</em>, piezoelectricity in poly(vinylidene fluoride) ECC specimens). However, achieving pure ECC structures under atmospheric pressure remains challenging due to kinetic limitations of ECCs and thermodynamic advantages of FCCs. Emerging strategies, such as inclusion complex templating crystallization, demonstrate potential for reducing processing constraints. The review also highlights specialized ECCs in conjugated polymers, cyclic polymers, and oligomers, emphasizing structure-property relationships. Despite advancements, scalability and energy-efficient production require further optimization. Future efforts should focus on elucidating nucleation kinetics, integrating multifunctional properties, and expanding applications in high-performance and versatile functional materials.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"333 ","pages":"Article 128656"},"PeriodicalIF":4.1,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144237020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Compatibility-driven modulation of mechanical property in 3D printed PEEK blends","authors":"Yang Yang ,&nbsp;Bo Jiang ,&nbsp;Haodong Liu ,&nbsp;Ting Zhao ,&nbsp;Chang Yu ,&nbsp;Boyin Yang ,&nbsp;Hong Gao ,&nbsp;Xuefeng Li ,&nbsp;Yingshuang Shang ,&nbsp;Haibo Zhang","doi":"10.1016/j.polymer.2025.128648","DOIUrl":"10.1016/j.polymer.2025.128648","url":null,"abstract":"<div><div>Additive manufacturing of poly ether ether ketone (PEEK) is increasingly used to produce complex three-dimensional (3D) products, but controlling interlayer performance remains challenging. To address this, we synthesized a series of rigid fluorene-containing amorphous polymers by systematically modulating the molar ratio of resorcinol to bisphenol fluorene with varying compatibility with PEEK. These polymers were then blended with PEEK to investigate the compatibility effects on interlayer properties. A relationship among interlayer strength and the diffusion and entanglement of polymer chains was established. Isothermal crystallization studies revealed that blending with amorphous polymers extends the crystallization time of PEEK and enhances interlayer healing, thereby improving interlayer strength. Atomic force microscopy-infrared tests confirmed the accumulation and diffusion of amorphous and partially compatible fluorene-containing polymers at the interface of the blends, which enables the best-performing blends to have three times the interlayer strength of pure PEEK. These findings provide valuable insights into the molecular chain dynamics during printing, supporting the development of materials with optimized interlayer properties.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"333 ","pages":"Article 128648"},"PeriodicalIF":4.1,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144229132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Porous composite proton exchange membranes with hollow polybenzimidazole nanocages","authors":"Zijian Li,&nbsp;Haochuan Luo,&nbsp;Xilong Ye,&nbsp;Kaixin Lin,&nbsp;Huawei Wu","doi":"10.1016/j.polymer.2025.128660","DOIUrl":"10.1016/j.polymer.2025.128660","url":null,"abstract":"<div><div>Hollow polybenzimidazole nanocages (PBInc) are synthesized using UiO-66-NH₂ as templates. The surface polybenzimidazole (PBI) layer of PBInc is cross-linked to enhance its structural stability. The morphology of PBInc is characterized using a transmission electron microscope (TEM), revealing stable and flexible nano-sized hollow structures with diameters ranging from 50 to 150 nm. Subsequently, porous Nafion/PBInc composite membranes (Nf-PBInc) are prepared. Among them, Nf-PBInc-5 % displays evenly-distributed and isolated pores with diameters of approximately 100–200 nm. In contrast, Nf-PBInc-8 % and Nf-PBInc-12 % exhibit agglomerated and interconnected pore structures. When compared with Nafion, the composite membranes demonstrate superior performance in terms of water uptake, proton conductivity, thermal stability, swelling ratio, and methanol permeability. Specifically, Nf-PBInc-5 % exhibits the highest proton conductivities across the entire temperature range, reaching a maximum of 0.243 S cm⁻¹ at 100 °C, which is 1.85 times that of Nafion. In conclusion, the porous Nafion/PBInc composite membranes hold significant promise for application in proton exchange membranes (PEMs).</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"333 ","pages":"Article 128660"},"PeriodicalIF":4.1,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144229131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation of polyacrylate emulsion and superhydrophobic fluorinated polyacrylate /SiO2 hybrid coating based on fluorinated short branched chains","authors":"Shiyi Liu ,&nbsp;Hao Hu ,&nbsp;Min Sha ,&nbsp;Ding Zhang ,&nbsp;Biao Jiang","doi":"10.1016/j.polymer.2025.128657","DOIUrl":"10.1016/j.polymer.2025.128657","url":null,"abstract":"<div><div>A novel fluorinated methacrylate monomer (FMA) containing perfluorinated branched-short chain groups was successfully synthesized, and core-shell emulsions with different fluorine contents were prepared by two-step seed emulsion polymerization. The fluorinated polyacrylate (PFA) emulsion was characterized by fourier transform infrared spectroscopy (FTIR), dynamic light scattering (DLS) and transmission electron microscopy (TEM). By using of the prepared fluorinated polyacrylate (PFA) emulsion and silica sol, a convenient one-step spray method that led to substrates with efficient water repellency was developed. The water contact angle (WCA) of these coatings was up to 152°, and the water droplets can fall off freely. In addition, several varies substrates were coated and all of them exhibited superhydrophobicity in order to verify the universality of the coating, and the coatings had good adhesion on these substrates. The coated cotton fabric also had certain anti-fouling properties and acid-base resistance. These substrate independent coatings have the potential to be used in many fields.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"333 ","pages":"Article 128657"},"PeriodicalIF":4.1,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144229253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}