Journal of Applied Polymer Science最新文献

{"title":"Polyurea-Amide Based Thin-Film Composite Nanofiltration Membrane With Improved Acid Resistance","authors":"Jianhang Qiu,&nbsp;Xinrui Chai,&nbsp;Heguo Han,&nbsp;Linjian Sang,&nbsp;Yuxuan Sun,&nbsp;Yaohan Chen,&nbsp;Shenghai Li,&nbsp;Suobo Zhang","doi":"10.1002/app.57147","DOIUrl":"https://doi.org/10.1002/app.57147","url":null,"abstract":"<div>\u0000 \u0000 <p>Polyurea emerges as a promising material for acid nanofiltration membranes due to its high hydrogen-bonding capacity and low electron density from carbonyl groups. However, conventional polyurea-based composite membranes suffer from limited separation performance and acid stability due to insufficient hydrophilicity and conjugated structures. In this study, a novel monomer, 3,5-diisocyanate benzoyl chloride, was synthesized and employed as the organic-phase precursor in interfacial polymerization to fabricate thin-film composite (TFC) membranes with polyurea-amide active layers. During polymerization, the acyl chloride groups undergo partial hydrolysis, introducing carboxylate anions into the active layer. The NF membrane shows over 98.6% rejection of MgSO₄ at pH 7, and membrane water permeability can reach 3.41 L m⁻² h⁻¹ bar⁻¹. Additionally, the aqueous phase monomer 2,4-diaminobenzenesulfonic acid was incorporated to construct a fully aromatic active layer, which strengthens intermolecular conjugation and acid resistance. Comparative analysis demonstrated that the synthesized membranes outperform traditional polyurea-based membranes (prepared via toluene diisocyanate and fatty amines) in acid stability: after soaking in 20 wt% H₂SO₄ for 100 days, the MgSO₄ rejection remained nearly unchanged. This study establishes a molecular design strategy integrating hydrophilic functionalization and conjugated aromatic structures to address critical limitations in polyurea membranes, offering a pathway toward robust nanofiltration systems for acid-resistant applications.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 28","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144281529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Innovative Polymer Nanocomposite of P(VDF-TrFE)/PEDOT:PSS/MgO for High-Performance Supercapacitors","authors":"Megha Goyal,&nbsp;Nitu Bhatnagar","doi":"10.1002/app.57154","DOIUrl":"https://doi.org/10.1002/app.57154","url":null,"abstract":"<div>\u0000 \u0000 <p>This study presents an innovative P(VDF-TrFE)/PEDOT:PSS/MgO composite electrode, designed to enhance the electrochemical performance of supercapacitors. The synergistic combination of P(VDF-TrFE) (high dielectric constant), PEDOT:PSS (high electrical conductivity), and MgO nanoparticles (improved ion accessibility) results in an optimized nano-architecture for superior charge storage. Structural and morphological analyses confirm the formation of a well-dispersed composite with enhanced interfacial interactions. The electrode exhibits a specific capacitance of 50 F/g at 10 mV/s, retaining 70% at high scan rates, with excellent cyclic stability over 5000 cycles. Electrochemical impedance spectroscopy reveals low solution resistance (1 Ω) and charge transfer resistance (6 Ω), ensuring efficient charge transport. Compared to conventional polymer-based electrodes, this composite demonstrates higher capacitance retention, lower internal resistance, and superior energy density (0.01 Wh/kg at 0.08 A/g). These findings establish P(VDF-TrFE)/PEDOT:PSS/MgO as a promising material for next-generation flexible and high-performance energy storage applications.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 28","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144281530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Polymer–Zeolite Interactions on the Separation Performance of Modified DD3R Membrane","authors":"Mohammad Javad Vaezi,&nbsp;Hasan Javadi,&nbsp;Ali Akbar Babaluo","doi":"10.1002/app.57073","DOIUrl":"https://doi.org/10.1002/app.57073","url":null,"abstract":"<div>\u0000 \u0000 <p>The effect of polymer–zeolite interactions was investigated by examining the coating parameters of cellulose acetate (CA) on the separation performance of DD3R membranes. Varying polymer concentrations and the number of coating stages, with an immersion time of 30 s, partially block nonzeolitic pores. Although low polymer solution concentrations result in higher blockage of nonzeolitic pores, a 30-s immersion time minimally affects separation performance. Extending the immersion time to 15 min increases polymer–zeolite interactions and pore blockage. The selective behavior of the blocked pores for CO₂ enhanced the selectivity of the modified membrane for CO₂/N₂ (113% of the theoretical perm selectivity value). This proves the hypothesis of using a selective polymer material to create a synergistic effect of the polymer with the zeolite layer in gas separation. In this synergy, the adsorption–diffusion mechanism in the DD3R zeolite pores and the solution–diffusion mechanism in the nonzeolite pores by CA play the gas separation role.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 26","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144190902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Significant Differences in Structure and Properties of Cast Film Prepared by Solution Casting and Coat Layer Prepared by Solution Coating of Block Copolymer Adhesives","authors":"Takahiro Doi,&nbsp;Shinichi Sakurai","doi":"10.1002/app.57127","DOIUrl":"https://doi.org/10.1002/app.57127","url":null,"abstract":"<div>\u0000 \u0000 <p>This study reports significant differences in the structures and properties of test specimens of block copolymer adhesives prepared according to two different methods, solution casting and solution coating. To evaluate the mechanical properties of a pressure-sensitive adhesive (PSA), test pieces are generally prepared by solution casting (solvent evaporation). Thus, the obtained specimen is completely different from the PSA layer of an actual PSA tape, which is commonly prepared by solution coating. This concept of equivalence of the two PSA test pieces is commonly adopted by engineers in PSA production companies, and violation of this concept may critically affect their research and development activities. In this current study, it was found that the surface segregation of the tackifier influenced the viscoelastic behavior of cast films, and the peak-top temperature of the loss tangent (tan δ) was lower than that of the corresponding coat layer. Additionally, conditions were derived experimentally for the commonly used solution casting, by which mechanical properties equivalent to those of the test piece prepared by solution coating were accidentally obtained. This outcome of the current study can greatly contribute to the community of the PSA industries.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 27","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144244828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing Adhesion and Corrosion Resistance of Epoxy Coatings on Steel Reinforcing Bars Through the Incorporation of Functional Interface Layers","authors":"Bing Yin,&nbsp;Youqing Hou,&nbsp;Xiaoyue Jia,&nbsp;Fangyu Fan,&nbsp;Pan Wang,&nbsp;Ditao Niu,&nbsp;Dongshuai Hou","doi":"10.1002/app.57116","DOIUrl":"https://doi.org/10.1002/app.57116","url":null,"abstract":"<div>\u0000 \u0000 <p>To enhance the stability of epoxy (EP) coatings on steel bars while improving their active and passive corrosion protection properties, the functional composite coatings were designed and prepared. Intercalated zirconium phosphate nanofillers (LCZrP) loaded with corrosion inhibitors were firstly synthesized and designed, and then were integrated into silane coatings (SC), which were preapplied to the bar substrate to enhance the integrity and interfacial adhesion properties. Lastly, an epoxy layer was applied, resulting in the functional composite coatings (LCZrP/SC/EP). The chemical composition and surface morphology were performed using scanning electron microscopy–energy dispersive X-ray spectroscopy (SEM-EDS). The corrosion resistance of the coatings was evaluated using electrochemical impedance spectroscopy (EIS), complemented by adhesion tests to analyze the service stability of the coatings. The findings revealed that the silane interlayer notably improved the interfacial bonding at the junction where the epoxy resin interacts with the steel bar, thereby enhancing the corrosion resistance. Notably, the coating presented the optimal corrosion resistance when the nanofiller content was 0.04 wt.%. The impedance modulus at 0.01 Hz (|Z|_0.01Hz) for the LCZrP/SC/EP coated coating was 5.05 × 10¹⁰ Ω·cm², which was two orders of magnitude greater than that of the EP coatings and the EP coating with silane interlayer (SC/EP) by one order of magnitude. Following 30 days of immersion, its |Z|₀._01Hz remained higher than the EP coating as well as the SC/EP coatings. The integral LCZrP/SC/EP coatings exhibit excellent long-lasting corrosion protection, owing to the self-responsive characteristics of LCZrP, the interfacial adhesion of the LCZrP/SC interlayer, and the enhanced barrier effect of the EP coatings. This combination effectively integrates active and passive protection strategies, thereby preventing metal corrosion. The above solution ensures that the coatings provide durable and reliable protection against corrosion over extended periods.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 27","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144244845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Zinc Oxide Nanowire-Enhanced Interlocking Interfaces in Mechanically Robust Basalt Fiber/Epoxy Lamellar Composites","authors":"Tongrui Zhang,&nbsp;Chun Zhang,&nbsp;Rui Han,&nbsp;Wenyan Wang,&nbsp;Min Nie","doi":"10.1002/app.57137","DOIUrl":"https://doi.org/10.1002/app.57137","url":null,"abstract":"<div>\u0000 \u0000 <p>The contradiction between the widespread application of basalt fibers (BFs) and their poor interfacial interaction with polymers has become an urgent issue for the preparation of BF/thermosetting polymer composites. In this study, zinc oxide (ZnO) nanofibers were successfully grown on the surface of BFs through a surface modification process involving polydopamine (PDA) coating, followed by a two-step hydrothermal method to create an interfacial interlocking structure. As a result, the interfacial interaction between the modified BFs and epoxy resin was significantly enhanced, as evidenced by the increase in interfacial shear strength from 13.3 to 22.4 MPa, greatly improving the mechanical properties of the resulting composite. The impact toughness and flexural strength of the modified composites increased from 46.4 kJ/m² and 278.4 MPa to 59.6 kJ/m² and 347.5 MPa, respectively. This not only addresses the issue of weak interfacial interaction between BFs and polymers to expand the application potential of BFs, but also provides an effective strategy for the other inorganic fibers to enhance the interfacial interaction with polymer.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 28","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144281480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermal Stability and Optoelectronic Behavior of a Polyaniline–Graphene Nanocomposite","authors":"Pralhad Lamichhane,&nbsp;Ishan N. Jayalath,&nbsp;Dilli Dhakal,&nbsp;Ganga Raj Neupane,&nbsp;Nishan Khatri,&nbsp;Parameswar Hari,&nbsp;Kaan Kalkan,&nbsp;Ranji Vaidyanathan","doi":"10.1002/app.57169","DOIUrl":"https://doi.org/10.1002/app.57169","url":null,"abstract":"<div>\u0000 \u0000 <p>This study proposes the use of commercially available graphene nanoplates (GNPs) as a potential filler to optimize the bandgap energy of polyaniline (PANI). In situ cationic polymerization of PANI was performed with various concentrations of GNPs. The morphology, microstructure, and optoelectronic properties of the polyaniline-graphene nanoplates (PANI–GNP) composites were studied using numerous analytical tools. The in situ polymerization of aniline in the composites resulted in the exfoliation of stacked graphene sheets due to the intercalation of the polymer molecules among the graphene sheets and the H-bond interaction among residual functional groups on the graphene surface and the polymer. The thermal stability and electrical conductivity of PANI in the composites increased with increasing GNPs content, as evidenced by the thermogravimetry and DC electrical conductivity analysis. The bandgap energy of pure PANI and the composites was deduced using the Tauc equation. Incorporating GNPs resulted in decreasing the optical bandgap energy of PANI from 3.25 to 2.47, 2.36, and 2.34 eV in the 5%, 10%, and 15% PANI–GNP composites, respectively.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 28","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144281479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistic Reinforcement of Ethylene–Butene–Terpolymer Rubber by Graphene and Zinc Dimethacrylate: Multicrosslinking and Underlying Mechanisms","authors":"Li Zhang,&nbsp;Jianming Liu,&nbsp;Duanjiao Li,&nbsp;Wenxing Sun,&nbsp;Zhi Li,&nbsp;Yongchao Liang,&nbsp;Qiang Fu,&nbsp;Nian Tang,&nbsp;Pengxiang Bai,&nbsp;Yuqi Wang,&nbsp;Jiuming Liang","doi":"10.1002/app.57134","DOIUrl":"https://doi.org/10.1002/app.57134","url":null,"abstract":"<div>\u0000 \u0000 <p>The growing demand for advanced rubber composites highlights the need for enhanced performance and durability. This study explores the synergistic reinforcement effect of graphene nanosheets (GNs) and zinc dimethacrylate (ZDMA) on ethylene–butene–terpolymer (EBT) composites, focusing on their microscopic reinforcement mechanisms. In situ-modified GNs and ZDMA are employed for co-crosslinking. The impact of varying GNs contents and ZDMA ratios is analyzed, with a focus on their effects on the material's mechanical, thermal, and dynamic properties. GNs significantly enhance tensile strength, elongation at break, and hysteresis heat generation, while ZDMA further improves strength and thermal stability by optimizing the crosslinking network. Their synergy markedly boosts the performance of EBT composites, making them ideal for high-strength, high-temperature applications. The study provides design guidelines for advanced automotive rubber components and lays a foundation for optimizing EBT composites.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 27","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144244829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tuning the Electron Trapping for Enhancing the Dielectric Energy Storage Performance of Polypropylene","authors":"Sen Meng,&nbsp;Cheng Yao,&nbsp;Gang Liu,&nbsp;Xianjun Lin,&nbsp;Lei Jia,&nbsp;Shangmao Hu,&nbsp;Taishan Hu,&nbsp;Lulu Yao","doi":"10.1002/app.57162","DOIUrl":"https://doi.org/10.1002/app.57162","url":null,"abstract":"<div>\u0000 \u0000 <p>The rapid development of high-end equipment, such as ultrahigh-voltage transmission and new energy vehicles, has created a pressing need for thin-film capacitors with high-temperature resistance and high energy storage capacity. In this study, 1-(2,4-dihydroxyphenyl)-2-(4-hydroxyphenyl) ethyl ketone (DPHPE), a voltage stabilizer with high electrophilic affinity, was introduced into a polypropylene (PP) matrix. Charge traps in the modified matrix effectively captured high-energy carrier electrons, leading to simultaneous improvements in the high-temperature resistance, high-pressure resistance, and energy storage performance of PP. Results show that the breakdown field strength of pure PP is 557 and 435 MV m⁻¹ at 25°C and 105°C, respectively. Moreover, for the PP/DPHPE composites containing 0.50 wt% DPHPE, the breakdown field strength improves by 29.8% and 21.1% compared with pure PP, reaching 723 and 527 MV m⁻¹ at 25°C and 105°C, respectively. Furthermore, the composites achieve a dielectric constant of ~2.7 at 25°C, a dielectric loss of &lt; 0.01, an energy storage density of 7.5 J cm⁻³ at 600 MV m⁻¹, and an energy release efficiency of 89.3%. This study provides a new insight for constructing all-organic composite dielectric materials with high-temperature resistance and high energy storage capacity.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 28","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144281478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Improvement of Fire Safety Performance of Polyurethane by Introducing MPP Derivative Functionalized Zeolitic Imidazolate Framework 8 (ZIF–8) Flame Retardant","authors":"Yi-Jen Huang,&nbsp;Wei-Jyun Lin,&nbsp;Chin-Lung Chiang","doi":"10.1002/app.57088","DOIUrl":"https://doi.org/10.1002/app.57088","url":null,"abstract":"<div>\u0000 \u0000 <p>A green and environmental-friendly flame retardant was prepared using halogen-free zeolitic imidazolate framework-8 (ZIF-8) to reduce the flammability and dripping behavior of polyurethane (PU). Mainly comprising phosphorus and nitrogen, the retardant was produced by functionalizing ZIF-8. First, ZIF-8 and melamine (MPP) were dissolved in absolute alcohol. Microencapsulation was performed using the –Zn²⁺ group of the ZIF-8 and the –NH₂ of the MPP to form a novel intumescent flame retardant, MPP@ZIF-8. Furthermore, silanol-terminated PU (Si-PU) was formed through the reaction of isophorone diisocyanate (IPDI) with polyol and 3-aminopropyltriethoxysilane (APTS), and then MPP@ZIF-8 was introduced into the silanol-terminated PU to prepare a polymer composite material. The microencapsulation of the ZIF-8 and MPP was verified with Fourier-transform infrared spectroscopy, and scanning electron microscopy revealed that, when the additive amount was increased to 40 wt%, high-temperature combustion produced a thick and dense char layer. Raman spectroscopy further demonstrated that MPP@ZIF-8 was primarily effective in the condensed phase; with an additive amount of 40 wt%, the I_D/I_G value decreased from its initial 0.72 to 0.69, indicating substantial damage to the structure and increased formation of the char layer. Furthermore, the ZIF-8 was an effective flame retardant in both the gas phase and condensed phase by promoting the formation of a continuous and dense char layer and releasing NH₃ and H₂O gases, which acted as diluents. A cone calorimeter test showed that the total heat release of the MPP@ZIF-8 composite material decreased from 35.7 to 32.5 MJ/m² and that the peak heat release rate also decreased from 910.2 to 591.5 kW/m². These results confirmed the safety improvement of the proposed material during a fire.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 26","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144191069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}