Journal of Applied Polymer Science最新文献_第2页

Foam Injection Molded Stereocomplex PLA: Processing, Thermal Behavior and Foam Structure 泡沫注塑成型立体复合PLA：加工、热行为和泡沫结构

IF 3.1 3区化学

Journal of Applied Polymer Science Pub Date : 2026-10-14 Epub Date: 2026-09-11 DOI: 10.1002/app.71514

Hendrik Becker, Roman Rinberg, Martin Schneebauer, Tobias Hartmann, Lothar Kroll

{"title":"Foam Injection Molded Stereocomplex PLA: Processing, Thermal Behavior and Foam Structure","authors":"Hendrik Becker, Roman Rinberg, Martin Schneebauer, Tobias Hartmann, Lothar Kroll","doi":"10.1002/app.71514","DOIUrl":"https://doi.org/10.1002/app.71514","url":null,"abstract":"<p>In this study, the processing of stereocomplex poly(lactic acid) (sc-PLA) via continuous compounding followed by thermoplastic foam injection molding (FIM) is investigated. Various nucleating agents are compounded with a mixture of poly(L-lactide) (PLLA) and poly(D-lactide) (PDLA). The crystalline material structures are greatly influenced by the cooling conditions of the extruded strand. In particular, a controlled two-stage cooling strategy, consisting of initial air cooling followed by water-bath cooling, effectively suppresses cold crystallization and promotes a predominantly stereocomplex crystallization behavior of the granulates. PLLA and PDLA are compounded with the aluminum complex NA-21 and talc as nucleating agents and processed into foamed specimens using FIM with nitrogen as a physical blowing agent. X-ray diffraction confirms a primarily stereocomplex crystalline structure in the foamed specimens, and scanning electron microscopy reveals a closed-cell foam morphology within the PLA matrix. The present study thus demonstrates the feasibility of stereocomplex crystallite formation in thermoplastic foam injection molding, establishing a processing route for sc-dominated PLA foam parts that combines the density reduction of foaming with the elevated melting range of the stereocomplex crystalline structure.</p>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 44","pages":""},"PeriodicalIF":3.1,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/app.71514","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149177196","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}

引用次数: 0

Ultrafast Infrared-Induced Crosslinking of Polyvinyl Alcohol/Cellulose Nanocrystal Composites for Enhanced Water Resistance and Barrier Properties 聚乙烯醇/纤维素纳米晶复合材料的超快红外诱导交联增强耐水性和阻隔性

IF 3.1 3区化学

Journal of Applied Polymer Science Pub Date : 2026-10-14 Epub Date: 2026-09-14 DOI: 10.1002/app.71509

Qianqian Wu, Zixuan Zhang, Hua Jiang

{"title":"Ultrafast Infrared-Induced Crosslinking of Polyvinyl Alcohol/Cellulose Nanocrystal Composites for Enhanced Water Resistance and Barrier Properties","authors":"Qianqian Wu, Zixuan Zhang, Hua Jiang","doi":"10.1002/app.71509","DOIUrl":"https://doi.org/10.1002/app.71509","url":null,"abstract":"<div>\u0000 \u0000 <p>Polyvinyl alcohol (PVA) has been extensively explored for its excellent film-forming properties. However, its poor water resistance has limited practical applications. Crosslinking, a common method that enhances the water resistance, mechanical properties, and thermal stability of PVA films, is often employed. Although conventional hot-air crosslinking can improve performance, it suffers from long processing times and high energy consumption. This study introduces infrared (IR) radiation instead of hot-air heating to achieve ultra-rapid crosslinking of PVA/cellulose nanocrystals (CNC) composites with poly (maleic anhydride) (PMA). Compared to hot-air treatment, which requires 7200 s, IR treatment significantly enhances crosslinking efficiency, reducing the composite film's swelling rate by approximately 20% in just 120 s. FT-IR analysis confirms that IR radiation promotes a more complete esterification crosslinking reaction. The IR-treated composite film exhibited the best performance: water vapor transmission rate decreased from 1.447 g·m<sup>−2</sup>·d<sup>−1</sup> (without heat treatment) to (0.175 g·m<sup>−2</sup>·d<sup>−1</sup>). The tensile strength of the composite film reached 47.18 MPa, significantly higher than the 39.03 MPa achieved with hot-air treatment, and the strength retention rate remained as high as 92% at 50% relative humidity, along with superior thermal stability. This study provides a rapid, energy-efficient new strategy for the efficient preparation of high-performance PVA-based composite films.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 44","pages":""},"PeriodicalIF":3.1,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149177257","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}

引用次数: 0

Fabrication and Performance of Asymmetric Polyetherimide Air Separation Membranes Using N-Butyl Pyrrolidinone as a Greener Solvent 以n -丁基吡咯烷酮为绿色溶剂制备非对称聚醚酰亚胺空气分离膜及其性能

IF 3.1 3区化学

Journal of Applied Polymer Science Pub Date : 2026-10-14 Epub Date: 2026-09-13 DOI: 10.1002/app.71512

Oğuz Orhun Teber, Anıl Kuban, Vahid Vatanpour, Ismail Koyuncu

{"title":"Fabrication and Performance of Asymmetric Polyetherimide Air Separation Membranes Using N-Butyl Pyrrolidinone as a Greener Solvent","authors":"Oğuz Orhun Teber, Anıl Kuban, Vahid Vatanpour, Ismail Koyuncu","doi":"10.1002/app.71512","DOIUrl":"https://doi.org/10.1002/app.71512","url":null,"abstract":"<div>\u0000 \u0000 <p>Membrane-based gas separation has emerged as an energy-efficient and scalable alternative to conventional separation technologies. However, the fabrication of defect-free polymeric membranes using environmentally benign solvents remains a major challenge. In recent years, studies have explored the use of green solvents as sustainable replacements for conventional toxic solvents in membrane preparation. In this study, selective polyetherimide flat sheet membranes were successfully fabricated using N-butyl pyrrolidone as a green solvent for the first time. The effect of the N-butyl pyrrolidone/tetrahydrofuran ratio on the resulting membrane morphology, gas permeation properties, and O<sub>2</sub>/N<sub>2</sub> selectivity was systematically investigated. The optimized membrane demonstrated competitive gas separation performance, exhibiting 2.54 GPU permeance and 4.47 selectivity of O<sub>2</sub>/N<sub>2</sub> values comparable to those obtained from conventional solvent systems. He/N<sub>2</sub> selectivity was also investigated to clarify the membrane mechanism. NBP is demonstrated to be an effective and sustainable alternative to traditional solvents for the fabrication of asymmetric, selective polyetherimide membranes, representing a significant step toward greener and safer membrane production for gas separation applications.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 44","pages":""},"PeriodicalIF":3.1,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149177377","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}

引用次数: 0

Study on the Structure and Properties of Polyvinyl Butyral (PVB) Films for Photovoltaic (PV) System 光伏系统用聚乙烯醇丁醛（PVB）薄膜的结构与性能研究

IF 3.1 3区化学

Journal of Applied Polymer Science Pub Date : 2026-10-14 Epub Date: 2026-09-07 DOI: 10.1002/app.71499

Zhifei Wu, Liangtian Zou, Yujie Zhou, Wei Liu, Cancan Lu, Qi Yan, Daoliang Wang

{"title":"Study on the Structure and Properties of Polyvinyl Butyral (PVB) Films for Photovoltaic (PV) System","authors":"Zhifei Wu, Liangtian Zou, Yujie Zhou, Wei Liu, Cancan Lu, Qi Yan, Daoliang Wang","doi":"10.1002/app.71499","DOIUrl":"https://doi.org/10.1002/app.71499","url":null,"abstract":"<div>\u0000 \u0000 <p>Polyvinyl butyral (PVB) films are promising encapsulation materials for photovoltaic (PV) modules because of their mechanical properties and electrical insulation. However, achieving favorable flexibility and volume resistivity remains an important consideration in the formulation of PVB films. Focusing on regulating these two properties, this study investigates the effects of molecular structure and plasticizer formulations on PVB performance. As acetoxy content increased from 2% to 12%, the glass transition temperature of the PVB resin decreased from 70.7°C to 64.4°C, while film flexibility and volume resistivity both showed favorable trends. Regarding plasticizer formulations, increasing plasticizer content generally reduces volume resistivity while significantly improving flexibility. For the triethylene glycol bis(2-ethylhexanoate) (3G8) system, PVB films maintain volume resistivity above 1.0 × 10<sup>16</sup> Ω·mm when plasticizer content is below 17.0%. The plasticizer type critically influences performance. At equivalent content, the system exhibits decreasing volume resistivity from dioctyl phthalate (DOP) to dioctyl sebacate (DOS), diisononyl phthalate (DINP), and triethylene glycol bis(2-ethylhexanoate) (3G8), while the flexibility follows the reverse sequence. Consistently, the through-cracked tensile (TCT) tests show that enhanced plasticization improves interlayer flexibility but reduces the adhesion-related load-bearing and crack-bridging capability of PVB/glass laminates. These findings highlight the inherent trade-offs in plasticizer formulations for optimizing both properties.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 44","pages":""},"PeriodicalIF":3.1,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149177145","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}

引用次数: 0

Long-Chain Silane-Modified Cotton Straw for the Preparation of Polyethylene Composite Board 制备聚乙烯复合板用长链硅烷改性棉秆

IF 3.1 3区化学

Journal of Applied Polymer Science Pub Date : 2026-10-14 Epub Date: 2026-09-09 DOI: 10.1002/app.71504

De-qiang Li, Yuan-yuan Chen, Jia-wei Ding, Li-na Guo, Tao Ding, Zun-qi Liu

{"title":"Long-Chain Silane-Modified Cotton Straw for the Preparation of Polyethylene Composite Board","authors":"De-qiang Li, Yuan-yuan Chen, Jia-wei Ding, Li-na Guo, Tao Ding, Zun-qi Liu","doi":"10.1002/app.71504","DOIUrl":"https://doi.org/10.1002/app.71504","url":null,"abstract":"<div>\u0000 \u0000 <p>Biomass-plastic composites (BPC) have become prominent for achieving high-value biomass applications and reducing reliance on traditional polymers. Silanization was a powerful method to improve the interfacial compatibility between biomass and plastics. In this study, dodecyltrimethoxysilane (DDTMS), a long-chain silane coupling agent rarely used to modify biomass, was selected to adjust the contact angle of cotton straw (CS), and the process was optimized using the Box–Behnken design (BBD). All contact angles of the modified CS (MCS) exceeded 117°, surpassing those achieved with short-chain silane coupling agents. Analysis of variance from the BBD highlighted the significance of the CS/DDTMS mass ratio and reaction temperature in increasing contact angles. Under optimal conditions, the contact angle of MCS reached 132°. Silane functionalization also enhanced the thermal stability of CS. The MCS with higher contact angles could be used to produce MCS/polyethylene composite boards that demonstrated significantly better thermal stability than native CS/polyethylene boards. The maximum tensile strength of these boards was 24.63 MPa with a strain of 25.3%. Additionally, MCS/polyethylene composite boards exhibited improved resistance to swelling and lower hygroscopicity compared with CS/polyethylene boards. These findings highlighted the potential of DDTMS-based silanization as a robust strategy for developing high-performance BPC.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 44","pages":""},"PeriodicalIF":3.1,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149177147","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}

引用次数: 0

Eco-Friendly Nonfluorinated Coating of Omniphobic Membranes With ZnO Nanoparticles Re-Entrant Structures: Design, Characterization, and Desalination Performance via Membrane Distillation 具有ZnO纳米颗粒可重入结构的环保无氟全疏膜涂层：设计、表征和膜蒸馏脱盐性能

IF 3.1 3区化学

Journal of Applied Polymer Science Pub Date : 2026-10-14 Epub Date: 2026-09-13 DOI: 10.1002/app.71507

Rendy Muhamad Iqbal, Mohd Hafiz Dzarfan Othman, Mohd Akmali Mokhter, Deni Shidqi Khaerudini, Fatin Hazirah Abdullah, Liew Chia Ming, Mohd Hafiz Puteh, Hamzah Fansuri, Triyanda Gunawan, Mohammed E. Ali Mohsin, Masniroszaime M. Zain, Wan Nurul Ffazida Wan Mustapa, Farahdila Kadirkhan, Rozaimi Abu Samah

{"title":"Eco-Friendly Nonfluorinated Coating of Omniphobic Membranes With ZnO Nanoparticles Re-Entrant Structures: Design, Characterization, and Desalination Performance via Membrane Distillation","authors":"Rendy Muhamad Iqbal, Mohd Hafiz Dzarfan Othman, Mohd Akmali Mokhter, Deni Shidqi Khaerudini, Fatin Hazirah Abdullah, Liew Chia Ming, Mohd Hafiz Puteh, Hamzah Fansuri, Triyanda Gunawan, Mohammed E. Ali Mohsin, Masniroszaime M. Zain, Wan Nurul Ffazida Wan Mustapa, Farahdila Kadirkhan, Rozaimi Abu Samah","doi":"10.1002/app.71507","DOIUrl":"https://doi.org/10.1002/app.71507","url":null,"abstract":"<div>\u0000 \u0000 <p>Membrane distillation commonly faces challenges such as wetting, fouling, and scaling, which limit its long-term desalination performance. In this study, an omniphobic membrane was developed via an ecofriendly coating approach, a nonfluorinated omniphobic PVDF hollow fiber membrane via dip coating of zinc oxide nanoparticles with various concentrations of 1–3 wt% as re-entrant structures, followed by stearic acid grafting. The proposed strategy enhanced surface roughness, reduced surface free energy, and promoted stable omniphobicity without fluorination. A comprehensive characterization was conducted using SEM, AFM, FTIR, XRD, contact angle goniometry, LEP testing, and ICP-OES analysis to confirm surface morphology, roughness, chemical bonding, and coating stability. The results show that increasing ZnO NPs concentration up to 3 wt% produced a surface roughness of 100.43 nm and contact angle above 120° for all tested liquids. The best membrane exhibited excellent desalination performance with water flux above 14 L/m<sup>2</sup>h and salt rejection of ~99.97% for five consecutive days under 30,000 ppm NaCl feed and 100 ppm humic acid. Accelerated chemical exposure under hot synthetic seawater showed less than 5% salt deposition while water contact angle remained above 90° after 48 h, demonstrating strong resistance to surface coating degradation.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 44","pages":""},"PeriodicalIF":3.1,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149177464","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}

引用次数: 0

Preparation and Characteristics of pH-Responsive Composite Packaging Films Based on Curcumin/Microcrystalline Cellulose/Polyvinyl Alcohol/Gelatin 姜黄素/微晶纤维素/聚乙烯醇/明胶ph响应复合包装薄膜的制备及性能研究

IF 3.1 3区化学

Journal of Applied Polymer Science Pub Date : 2026-10-14 Epub Date: 2026-09-17 DOI: 10.1002/app.71515

Jie Chen, Zhihao Si, Meng Yang, Xiongfang Luo, Jiru Jia, Xiaopeng Wu, Shiyi Tu

{"title":"Preparation and Characteristics of pH-Responsive Composite Packaging Films Based on Curcumin/Microcrystalline Cellulose/Polyvinyl Alcohol/Gelatin","authors":"Jie Chen, Zhihao Si, Meng Yang, Xiongfang Luo, Jiru Jia, Xiaopeng Wu, Shiyi Tu","doi":"10.1002/app.71515","DOIUrl":"https://doi.org/10.1002/app.71515","url":null,"abstract":"<div>\u0000 \u0000 <p>With the continuous improvement of food safety awareness, intelligent packaging, as a technology capable of automatically monitoring, sensing, recording, and tracing various circulation links such as food production, transportation, and storage, has emerged. In this study, gelatin (Gel) and polyvinyl alcohol (PVA) were employed as base materials, microcrystalline cellulose (MCC) as the reinforcing phase, curcumin (Cur) as the indicator reagent, and glycerol and distilled water as plasticizers. The solution casting method was utilized to prepare Cur/MCC/PVA/Gel composite films. The microstructure, mechanical properties, barrier properties, pH response properties, and biodegradation properties of the films were analyzed. During the Cur/MCC/PVA/Gel composite film system, increasing the curcumin content led to a decrease in both moisture content (by 13.60%) and hygroscopicity (by 12.69%), and the barrier properties and mechanical properties increased by 19.65% and 21.16%, respectively. In the beef preservation experiment, with the passage of time, the extent of spoilage and deterioration of the beef increased, and the color of the intelligent pH—responsive composite films gradually changed from yellow to dark brown. The pH—responsive packaging material of Cur/MCC/PVA/Gel provides a theoretical foundation for the research on food freshness indicator films.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 44","pages":""},"PeriodicalIF":3.1,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149177642","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}

引用次数: 0

Two-Step Fabrication of Hybrid Composite Using Direct Additively Manufactured PETG Mold/Inner Layer and Vacuum Bag-Assisted UV-Cured PLA-Like-Glass Fiber Composites as an Over-Mold for PPE Applications 使用直接增材制造PETG模具/内层和真空袋辅助uv固化pla类玻璃纤维复合材料作为PPE应用的复模制备复合材料的两步制备

IF 3.1 3区化学

Journal of Applied Polymer Science Pub Date : 2026-10-14 Epub Date: 2026-09-07 DOI: 10.1002/app.71500

Sean Bowman, Yiping Qiu, Linlin Qiu

{"title":"Two-Step Fabrication of Hybrid Composite Using Direct Additively Manufactured PETG Mold/Inner Layer and Vacuum Bag-Assisted UV-Cured PLA-Like-Glass Fiber Composites as an Over-Mold for PPE Applications","authors":"Sean Bowman, Yiping Qiu, Linlin Qiu","doi":"10.1002/app.71500","DOIUrl":"https://doi.org/10.1002/app.71500","url":null,"abstract":"<div>\u0000 \u0000 <p>A hybrid manufacturing strategy for protective equipment applications is presented, combining fused deposition modeling (FDM) of polyethylene terephthalate glycol (PETG) with vacuum bag-assisted UV-curing of glass fiber-reinforced, PLA-like photopolymer over-molds. X-ray diffraction confirmed FDM-induced crystallinity increase in PETG from 23.1% to 28.7%, enhancing substrate rigidity. Flexural modulus increased 38.8% (31.4 ± 0.8 MPa to 42.9 ± 1.9 MPa) with glass fiber reinforcement, though strength decreased from 89.6 ± 4.5 MPa to 65.1 ± 5.9 MPa due to modulus mismatch. Interlaminar shear strength (5.77 ± 1.76 MPa) revealed the PETG/photopolymer interface as the critical weakness, with predominant adhesive failure. This tool-less, digitally-driven approach enables rapid customization of geometrically complex composite structures while eliminating energy-intensive metal molds, establishing a scalable pathway for small-batch protective component manufacturing.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 44","pages":""},"PeriodicalIF":3.1,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149177188","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}

引用次数: 0

Conventional, Green, and Advanced Modification Techniques for Sodium Alginate Derived From Brown Seaweed 褐藻提取海藻酸钠的传统、绿色和先进改性技术

IF 3.1 3区化学

Journal of Applied Polymer Science Pub Date : 2026-10-14 Epub Date: 2026-09-10 DOI: 10.1002/app.71503

Himanshi S. Upadhyay, Shailesh V. Vanshiya, Meet Sutariya, Akansha Singh, Ravi K. Barad, Prachi Kachhiya Patel, Rutvik Patel, Reena Hirani, Karan Kamle, Dilip V. Vasava

{"title":"Conventional, Green, and Advanced Modification Techniques for Sodium Alginate Derived From Brown Seaweed","authors":"Himanshi S. Upadhyay, Shailesh V. Vanshiya, Meet Sutariya, Akansha Singh, Ravi K. Barad, Prachi Kachhiya Patel, Rutvik Patel, Reena Hirani, Karan Kamle, Dilip V. Vasava","doi":"10.1002/app.71503","DOIUrl":"https://doi.org/10.1002/app.71503","url":null,"abstract":"<p>The environment is in danger due to the increasing use of non-biodegradable materials and plastics, and to prevent the climate crisis it causes, biopolymers are an attractive alternative to petroleum-based products. Alginic acid or alginate has unique structural, physicochemical, and mechanical properties, including chemical composition, block structure, and molecular weight. These properties vary with the source, extraction technique, and functionalization/modification methods used to improve the alginate for commercial applications. The source of alginate is seaweed, which is abundant in marine biomass, and it has emerged as a versatile biopolymer across biomedical, pharmaceutical, food, and environmental applications due to its biodegradability and biocompatibility. It exhibits limitations in thermal stability, controlled crosslinking density, toughness, and mechanical tunability, despite its excellent properties. This study highlights methods for enhancing the properties of the alginate chain through chemical, enzymatic, and physical approaches. Furthermore, it enlightens the green approach to modifying the biopolymer. The review concludes with an overview of conventional and advanced methods for enhancing alginate and the commercial application of this functionalized biodegradable product and a critical evaluation of limitations, including future perspectives for alginate-based materials.</p>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 44","pages":""},"PeriodicalIF":3.1,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/app.71503","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149177420","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}

引用次数: 0

Innovative PLA or PCL-Based Ocular Implants Obtained From Tape Casting or Electrospinning for Sustained-Release Dexamethasone 采用胶带铸造或静电纺丝技术获得的新型PLA或pcl基眼植入物用于地塞米松缓释

IF 3.1 3区化学

Journal of Applied Polymer Science Pub Date : 2026-10-07 Epub Date: 2026-09-01 DOI: 10.1002/app.71448

Renata Bochanoski, Henrique Borba Modolon, Ronaldo Silveira, Januara Rodrigues, Tiago Bender Wermuth, Sabrina Arcaro, Oscar R. K. Montedo

{"title":"Innovative PLA or PCL-Based Ocular Implants Obtained From Tape Casting or Electrospinning for Sustained-Release Dexamethasone","authors":"Renata Bochanoski, Henrique Borba Modolon, Ronaldo Silveira, Januara Rodrigues, Tiago Bender Wermuth, Sabrina Arcaro, Oscar R. K. Montedo","doi":"10.1002/app.71448","DOIUrl":"https://doi.org/10.1002/app.71448","url":null,"abstract":"<p>Bioabsorbable ocular implant systems were developed for controlled dexamethasone delivery using poly(ε-caprolactone) (PCL) and polylactic acid (PLA) fabricated by electrospinning and tape casting. Tape casting was explored for the first time in ocular applications and compared with electrospun systems in terms of physicochemical properties, drug loading, release behavior, and biological performance. Dexamethasone release was monitored by UV–Vis spectrophotometry at 3, 24, 48, 120, and 144 h, and Fourier-transform infrared spectroscopy confirmed the presence of characteristic drug bands. The materials were incubated in phosphate-buffered saline at 35°C for up to 28 days, showing degradation of approximately 5% for PCL and 8% for PLA. In vitro MTT and scratch assays indicated biocompatibility above 75% for all biomaterials. Drug release was progressive and controlled, reaching up to 66 μg/mL for PCL-based systems and 21 μg/mL for PLA-based systems. Overall, tape casting proved technically feasible and showed performance comparable to electrospinning, supporting its potential use in implantable ocular drug delivery systems. The association of PCL or PLA with dexamethasone appears to be a promising strategy for sustained ophthalmic therapy.</p>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"143 43","pages":""},"PeriodicalIF":3.1,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/app.71448","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149099720","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}

引用次数: 0