Journal of Applied Polymer Science最新文献

{"title":"Influence of Botanical Origin on the Optical, Surface, and Nanomechanical Properties of Nanocellulose-Based Films: A Comparative Study","authors":"Márcia da Silva Costa,&nbsp;Erveton Pinheiro Pinto,&nbsp;Mário Vanoli Scatolino,&nbsp;Rodrigo Prioli Menezes,&nbsp;Adriano Reis Prazeres Mascarenhas,&nbsp;Matheus Cordazzo Dias,&nbsp;Gustavo Henrique Denzin Tonoli,&nbsp;Lina Bufalino,&nbsp;Francisco Tarcísio Alves Junior,&nbsp;Tiago Marcolino de Souza","doi":"10.1002/app.70631","DOIUrl":"https://doi.org/10.1002/app.70631","url":null,"abstract":"<p>Although the influence of botanical origin on nanocellulose properties is well recognized, an integrated multiscale framework linking chemical composition, fractal surface descriptors, and nanomechanical behavior under unified processing conditions remains unexplored for nanocellulose-based films. This work examines the effect of botanical origin on the multiscale properties of nanocellulose films produced under a standardized protocol from seven sources, including the first report of babaçu- and sisal-derived films. Natural-fiber films (açaí, babaçu, cactus, coffea) exhibit strong UV-shielding (&gt; 98% UVA blocking) but reduced transparency, whereas commercial eucalyptus and pinus pulps yield transparent films with limited UV protection. These optical differences, consistent with variations in lignin-derived chromophores, are supported by colorimetry and FTIR analysis. Atomic force microscopy reveals nanoscale surface organizations, with eucalyptus and sisal showing higher spatial complexity (Df &gt; 2.2), while force spectroscopy demonstrates that deformation behavior depends not only on intrinsic stiffness but also on adhesion-mediated responses. To the best of our knowledge, this is the first study to apply fractal surface parameters (Df, succolarity, and lacunarity) to correlate nanotopography with nanomechanical behavior in nanocellulose-based films. Together, results identify botanical source a key parameter and provide a framework for selecting feedstocks for applications such as UV-protective coatings, transparent substrates, or composites.</p>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 19","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/app.70631","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147667942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design of pH-Sensitive Alginate-Graft-Poly(2-Hydroxyethyl Methacrylate) Microparticles for Controlled Paclitaxel Release","authors":"Gülcan Geyik","doi":"10.1002/app.70623","DOIUrl":"https://doi.org/10.1002/app.70623","url":null,"abstract":"","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 19","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147667998","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":"Preparation and Application of Res@KGMMA/α-CSH/HMSN for Alveolar Bone Repair","authors":"Liying Huang,&nbsp;Lixian Zhang,&nbsp;Jun Su,&nbsp;Zhitian Shi,&nbsp;Min Zhang,&nbsp;Tingting Yan","doi":"10.1002/app.70624","DOIUrl":"https://doi.org/10.1002/app.70624","url":null,"abstract":"<div>\u0000 \u0000 <p>Inflammation, trauma, or diabetes can cause alveolar bone to become soft, slack, and bone-deficient. If left untreated, this can eventually result in resorption and constriction of the alveolar bone. The inability of the alveolar bone to heal itself clinically presents a challenge for future dental implants and other procedures. In order to overcome this difficulty, we created an injectable, light-curable hydrogel composite (Res@KGMMA/α-CSH/HMSN) that contains α-calcium sulfate hemihydrate (α-CSH) and hollow mesoporous silica nanoparticles (HMSN) loaded with resveratrol (Res) in a methacrylated konjac glucomannan (KGMMA) matrix. This composite effectively conforms to irregular bone defects, gels quickly when exposed to blue light, and allows for sustained drug release while reducing the risk of leakage. Significant antibacterial activity against <i>Staphylococcus aureus</i> and <i>Escherichia coli</i> was shown in vitro tests, along with increased human periodontal ligament stem cell proliferation. By the eighth week, micro-CT and histological analyses in a rabbit alveolar bone defect model showed significant new bone formation and upregulated expression of osteogenic markers (OPG, RUNX2, COL I, OPN, OCN). These results highlight the composite's exceptional osteogenic potential, biocompatibility, and clinical promise for alveolar bone regeneration.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 19","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147668227","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":"Rheological and Mechanical Characterization of Styrene-Butadiene Rubber Reinforced With Recovered Carbon Versus Carbon Black","authors":"Unal C. Yilmazoglu,&nbsp;Christopher G. Robertson","doi":"10.1002/app.70619","DOIUrl":"https://doi.org/10.1002/app.70619","url":null,"abstract":"<div>\u0000 \u0000 <p>We studied the rheological and mechanical property effects of replacing N650 carbon black (CB) with recovered carbon (rC) filler in styrene-butadiene rubber (SBR) compounds, using a type of rC produced from end-of-life tires by a chloramine devulcanization process. When compared at the same filler loading, rC gave a smaller Payne effect than CB in the uncured and cured states; this is consistent with the larger particle size for rC (lower surface area) and associated less tendency for filler networking. In Fourier transform rheology (FT-rheology), the strain amplitude (<i>γ</i>₀) dependence of the ratio of the third harmonic to the first harmonic for the dynamic torque (<i>I</i>_3/1) showed clear differences for compounds with rC versus CB. We proposed and utilized a new empirical Double Sigmoidal Nonlinearity Model (DSNM) to fit the <i>γ</i>₀-dependent <i>I</i>_3/1. This modeling approach captured well the data for all compounds and allowed the nonlinear rheological differences between rC and CB fillers to be effectively quantified. The cure curves, along with temperature-dependent viscoelastic measurements of the cured materials, indicated a reduction in crosslink density from substituting rC for CB. This under-cure effect, in addition to less filler reinforcement, resulted in deterioration of tensile mechanical properties from substituting rC for CB.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 19","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147668748","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":"Preparation of a Novel Yttrium-Based MOF Containing Phosphazene Rings and Its Application in EP","authors":"Xin Gao,&nbsp;Jing Cao,&nbsp;Qiuyu Wu,&nbsp;Ge Zhang,&nbsp;Quan Li,&nbsp;Yuxin Li,&nbsp;Hongqiang Qu","doi":"10.1002/app.70622","DOIUrl":"https://doi.org/10.1002/app.70622","url":null,"abstract":"<div>\u0000 \u0000 <p>This paper developed a rare-earth metal–organic framework (MOF) flame retardant and applied it to epoxy resin (EP). This process utilized hexa (4-carboxyphenoxy) cyclotriphosphazene as the organic ligand and yttrium nitrate hexahydrate as the rare-earth metal source to prepare a novel Yttrium-based MOF (Y-MOF) via a solvothermal method. The Y-MOF synthesized under optimal conditions was characterized using scanning electron microscopy (SEM) and Fourier-transform infrared spectroscopy (FT-IR). Thermogravimetric Analysis (TGA) and cone calorimetry (CCT) results indicate EP-1 exhibits excellent thermal stability with a high char residue of 12.25%. Concurrently, EP-1 reduces peak heat release rate (PHRR) and total heat release (THR) by 51.56% and 26.23%, respectively. Total smoke production (TSP) decreased by 10.23%, while peak CO production rate (PCOP) and peak CO₂ production rate (PCO₂P) decreased by 55.26% and 55.43%, respectively. The tensile strength and impact strength are 3.49% and 19.32% higher than those of pure EP, respectively.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 19","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147668005","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":"Design of Thermoplastic and Few-Layer Graphene Modified Epoxy Coatings With Semi-Interpenetrating Polymer Networks for Hydrogen-Bond Mediated Self-Healing and Mechanical Performance Enhancement","authors":"A. S. Keerthi,&nbsp;M. S. Manju,&nbsp;Lynda V. Thomas,&nbsp;Athiyanathil Sujith","doi":"10.1002/app.70617","DOIUrl":"https://doi.org/10.1002/app.70617","url":null,"abstract":"<div>\u0000 \u0000 <p>The growing demand for durable protective coatings in harsh environments has intensified interest in self-healing epoxy systems, which autonomously repair damage and extend service life. However, conventional epoxy coatings lack intrinsic self-healing functionality and are prone to damage. Thermoplastic modification, though effective in imparting self-healing, often compromises the mechanical strength, limiting broader applicability. In this study, epoxy is modified with polycaprolactone (PCL) and polyethylene glycol (PEG), facilitating the formation of a semi-interpenetrating network (semi-IPN), enabling reversible hydrogen bonding and shape memory behavior. The coating demonstrates a healing efficiency of 87% after 1 h of heat treatment. To overcome the associated decline in stiffness, graphene synthesized by microwave expansion is introduced as a nanofiller. The optimized Epoxy/Polycaprolactone/Polyethylene glycol/Graphene composite system with 0.075 wt% graphene achieved improved tensile strength (48.9 MPa) and outstanding healing efficiency (~92% at 80°C for 1 h). Electrochemical Impedance spectroscopy further confirmed the self-healing and anti-corrosive performance, with an outstanding inhibition efficiency (<i>P</i>_i) of 96.13%, charge transfer resistance of 8.73 × 10⁵ Ω·cm², and an impedance modulus of 8.2 × 10⁸ Ω·cm². These results establish the synergistic combination of thermoplastic modifiers and graphene as a promising route to design robust, multifunctional durable coatings with self-healing and corrosion resistance.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 19","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147668780","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":"Reinforced PBAT/PLA Foams With Lignin as a Bio-Based Nucleating Agent for High-Performance Building Insulation","authors":"Jie Zhang,&nbsp;Yantao Song,&nbsp;Kang Chen,&nbsp;Han Li,&nbsp;Haiyan Tan,&nbsp;Dingyuan Zheng,&nbsp;Yanhua Zhang","doi":"10.1002/app.70629","DOIUrl":"https://doi.org/10.1002/app.70629","url":null,"abstract":"<div>\u0000 \u0000 <p>Low melt-strength poly(butylene adipate-co-terephthalate) (PBAT) foams suffer from poor pore stability, which significantly limits their practical applications. To overcome this limitation, enhancing the melt strength of PBAT-based composites is essential for improving the stability of foamed materials. In this study, PBAT/PLA/lignin composite foams were prepared using a chemical hot-pressing method, with PBAT, PLA, and lignin as raw materials and azodicarbonamide (AC) as the blowing agent, aiming to develop renewable materials with favourable mechanical properties and thermal conductivity. The addition of PLA positively influenced the mechanical properties of the composites, while the complex molecular structure and rigidity of lignin resulted in lower thermal conductivity and enhanced mechanical properties. The results demonstrated that incorporating 20 wt% PLA and 10 wt% lignin into PBAT produced a uniform and fine pore structure. The resulting composite exhibited a homogeneous, fine-cell morphology, with a thermal conductivity of 0.100 W/(m·k), and impact and compressive strengths of 12.41 kJ/m³ and 12.91 MPa, respectively. These combined attributes make the composite a promising candidate for building insulation applications.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 19","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147667981","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":"3D-Printed Pinewood Biochar-Reinforced Polylactic Acid/Polybutylene Adipate-co-Terephthalate (PLA/PBAT) Composites: A Green Solution for High-Performance Antistatic Applications","authors":"Lekshmi Omana,&nbsp;Reenu Elizabeth John,&nbsp;Immanuel Paul,&nbsp;Runcy Wilson,&nbsp;P. L. Reshma,&nbsp;Rejo Mathew Joseph,&nbsp;S. Alen,&nbsp;Rejeena V. Rajan,&nbsp;Debes Bhattacharyya,&nbsp;Issac Paul,&nbsp;Justin George,&nbsp;Anoop Chandran","doi":"10.1002/app.70632","DOIUrl":"https://doi.org/10.1002/app.70632","url":null,"abstract":"<div>\u0000 \u0000 <p>The growing demand for sustainable antistatic materials in electronics and packaging has prompted research into biodegradable polymer composites with conductive biofillers. However, achieving optimal electrical conductivity while maintaining mechanical integrity remains challenging in conventional processing methods. This study investigated 3D-printed PLA/PBAT composites reinforced with sustainable pinewood (<i>Pinus radiata</i>.) biochar (BC) at loadings from 0 to 15 wt%. Filaments were prepared via melt mixing followed by single-screw extrusion, then fused filament fabricated (FFF) at optimized parameters. The biochar was synthesized by pyrolysis method. Scanning electron microscopy (SEM) and confocal Raman imaging confirmed uniform biochar dispersion and enhanced PLA-PBAT compatibility, with reduced phase separation compared to unfilled blends. Fourier transform infrared spectroscopy (FTIR) revealed specific polymer-filler interactions through selective peak shifts. Mechanical testing showed that the 1 wt% biochar composite (BC1) achieved optimal properties with significant improvements in mechanical properties over the pure blend. Higher biochar loadings caused agglomeration and reduced mechanical performance. Thermogravimetric analysis indicated consistent thermal stability at low biochar concentrations. Electrical measurements demonstrated that all biochar-containing composites met antistatic requirements, with BC1 exhibiting surface resistivity of 6.59 × 10¹¹ ± 2.08 × 10⁹ Ω/sq and volume resistivity of 7.84 × 10¹⁰ ± 3.5 × 10⁹ Ω cm at room temperature. The BC1 composite emerged as the optimal formulation, offering a balanced combination of mechanical robustness, thermal stability, and antistatic performance suitable for electronics packaging and electrostatic discharge protection applications.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 19","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147668045","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":"Thermoresponsive Injectable Pluronic Composite Hydrogels: Advances in Filler Integration for Regenerative Medicine","authors":"Siti Norfazira Ramli,&nbsp;Abiodun Abdulhameed Amusa,&nbsp;Sharifah Nafisah Syed Ismail,&nbsp;Zuratul Ain Abdul Hamid","doi":"10.1002/app.70611","DOIUrl":"https://doi.org/10.1002/app.70611","url":null,"abstract":"<p>Pluronic-based thermoresponsive injectable hydrogels have gained attention in tissue engineering because of their sol–gel transition at physiological temperature and ease of administration. However, rapid degradation, weak mechanical stability, and limited bioactivity affect their clinical translation. This review focuses on the role of fillers in modulating structural, mechanical, and biological properties while addressing advances in gelation, rheology, stability, and functional performance. Natural polymers such as chitosan, alginate, and gelatin enhance cellular compatibility and regenerative potential, while nanofillers like graphene oxide, silica, and clays improve strength, responsiveness, and durability. Metallic nanoparticles, particularly gold and silver, further extend functionality by imparting antibacterial properties, conductivity, and reinforcement. Fillers influence micelle aggregation and crosslinking, leading to improved rheology, controlled drug release, and greater biodegradability. Composite formulations consistently demonstrate superior outcomes in vitro and in vivo, promoting cell growth, differentiation, and mineral deposition, with demonstrated utility in cartilage repair, bone regeneration, wound healing, and cardiovascular applications. Despite these advances, translation remains constrained by instability, dilution effects, and regulatory hurdles. Future efforts should prioritize dual-network stabilization, stimuli-responsive gelation, and immune-compatible modifications to accelerate clinical adoption.</p>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 19","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/app.70611","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147668121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Performance Comparison and Ablation Mechanism Study of Short-Cut High-Silica Oxide Fiber and Aramid Fiber Reinforced Silicone Rubber Thermal Protection Coatings","authors":"He Zhang,&nbsp;Zheng Wei,&nbsp;He Shan,&nbsp;Yan Qin,&nbsp;Zhixiong Huang","doi":"10.1002/app.70626","DOIUrl":"https://doi.org/10.1002/app.70626","url":null,"abstract":"<div>\u0000 \u0000 <p>Although silicone rubber-based thermal protective coatings are widely used in the thermal protection field due to their outstanding properties, their inherent drawbacks of low mechanical strength and char residue require synergistic regulation via matrix modification and filler optimization. In this study, short-cut high-siloxane fibers (HSiF) and short-cut aramid fibers (AFs) were used as ablation-resistant fillers, and phenolic hollow microspheres (PF) were co-filled into silicone rubber to prepare heat-protective coating materials. A detailed comparative analysis of the properties of the different samples prepared was carried out. The results showed that the addition of both HSiF and AF could improve the residual carbon rate of silicone rubber composites, with HSiF acting more significantly. The residual carbon rate of the composites with 6 phr HSiF increased from 39.14% to 43.45% at 1000°C, and the line ablation rate and mass ablation rate decreased by 28.1% and 39.8%, respectively. The addition of AF also enhanced the ablation resistance, but the effect was relatively weak, and the line ablation rate and mass ablation rate of the composites with 6 phr AF decreased by 2.5% and 30.6%, respectively. This study provides insights for the development of silicone rubber composites in thermal protection applications.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 19","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147668120","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}