Journal of Applied Polymer Science最新文献_第9页

Green Solvent-Free MXene/Pectin Conductive Ink for Paper-Based Flexible Infrared Sensor 绿色无溶剂MXene/果胶导电油墨，用于纸基柔性红外传感器

IF 2.8 3区化学

Journal of Applied Polymer Science Pub Date : 2025-07-22 DOI: 10.1002/app.57664

Guojing Chen, Zhenqian Ma, Cankun Ma, Jiachen Liang, Jing Wei, Xinrui Wang, Chunpeng Chai

{"title":"Green Solvent-Free MXene/Pectin Conductive Ink for Paper-Based Flexible Infrared Sensor","authors":"Guojing Chen, Zhenqian Ma, Cankun Ma, Jiachen Liang, Jing Wei, Xinrui Wang, Chunpeng Chai","doi":"10.1002/app.57664","DOIUrl":"https://doi.org/10.1002/app.57664","url":null,"abstract":"<div>\u0000 \u0000 <p>This work presents a green, solvent-free MXene/pectin conductive ink for paper-based flexible infrared sensors, addressing the demand for sustainable electronics. The ink leverages MXene's plasmonic absorption (808 nm wavelength) and pectin's antioxidative properties to achieve a high electrical conductivity of 2800 S/m and long-term stability (> 42 days). Optimized MXene/pectin mass ratios (1:50) enable uniform screen-printing on A4 paper, forming continuous conductive networks with a photothermal response time of 21.2 s and a linear detection range of 50–350 mW. The sensors demonstrate exceptional mechanical robustness (95% signal retention after 500 bends) and cyclic stability (> 5 cycles), attributed to MXene's light-to-heat conversion and pectin's hydrogen-bonded protection against oxidation. Structural and electrochemical analyses confirm the ink's shear-thinning behavior and substrate compatibility, validated through noncontact thermal mapping and motion detection. This study provides a scalable, eco-friendly strategy for next-generation flexible sensors, bridging high-performance sensing with sustainable material design.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 43","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145237405","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

Enhancing Sound Insulation Abilities of Polyurethane Composites Through Molecular Sieve Incorporation 通过分子筛掺入提高聚氨酯复合材料隔声性能

IF 2.8 3区化学

Journal of Applied Polymer Science Pub Date : 2025-07-22 DOI: 10.1002/app.57658

Shuping Sun, Xiaodong Li, Hao Jiang, Tinglu Song, Zhongjia Yang, Meishuai Zou

{"title":"Enhancing Sound Insulation Abilities of Polyurethane Composites Through Molecular Sieve Incorporation","authors":"Shuping Sun, Xiaodong Li, Hao Jiang, Tinglu Song, Zhongjia Yang, Meishuai Zou","doi":"10.1002/app.57658","DOIUrl":"https://doi.org/10.1002/app.57658","url":null,"abstract":"<div>\u0000 \u0000 <p>Polyurethane (PU) has a wide range of applications in the field of noise reduction and vibration damping. In order to break through the bottleneck of sound insulation performance of PU, three different kinds of molecular sieves, 3A, 13X, and ZSM-5, with complex pore channels were incorporated into PU through the semi-prepolymer method. The sound insulation properties of PU/molecular sieve composites were obviously improved, especially in the frequency from 1000 to 2000 Hz. The composites also showed enhanced mechanical properties compared with PU. Tensile strengths of up to 15 MPa and elongation at break of 1256.23% were achieved. A slight expansion of the effective damping temperature range was observed. The sound insulation mechanism of PU/molecular sieve composites included fillers increasing the density of PU, microporous channels dissipating sound waves, dissipating energy, and dispersing stress by good compatibility of inorganic and organic phases. The excellent compatibility came from physical and chemical synergies of soft segments perforated molecular sieves as well as the reaction between active groups of PU and acidic sites of molecular sieves. This study provided comprehensive mechanisms and strategies for the enhancement of sound insulation, and more targeted research and application can be conducted in the future.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 43","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145237245","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

Effects of Polyethylene Glycol (PEG) on the Structure and Properties of Flexible PEG/PLA Composite Films 聚乙二醇（PEG）对柔性PEG/PLA复合薄膜结构和性能的影响

IF 2.8 3区化学

Journal of Applied Polymer Science Pub Date : 2025-07-22 DOI: 10.1002/app.57671

Hongyu Gao, Shi Xu, Yongjie Ai, Zhonggui Zhang, Chengxue Li, Chunxiu Liu, Huikai Nan, Ye Hu, Yanming Shi, Yubing Dong, Lin Lv

{"title":"Effects of Polyethylene Glycol (PEG) on the Structure and Properties of Flexible PEG/PLA Composite Films","authors":"Hongyu Gao, Shi Xu, Yongjie Ai, Zhonggui Zhang, Chengxue Li, Chunxiu Liu, Huikai Nan, Ye Hu, Yanming Shi, Yubing Dong, Lin Lv","doi":"10.1002/app.57671","DOIUrl":"https://doi.org/10.1002/app.57671","url":null,"abstract":"<div>\u0000 \u0000 <p>To enhance the toughness of polylactic acid (PLA) films, the polyethylene glycol (PEG)/PLA films were prepared via the film-blowing process. The effects of PEG molecular weight, content, storage environment, and degradation time on the mechanical, thermal, optical, and degradation properties of the films were systematically investigated. The results showed that PEG significantly enhanced the elongation at break of the films. Low molecular–weight PEG outperformed high molecular–weight PEG in toughening of the films. Outdoor environment exposure drastically reduced the elongation of the films, while indoor/refrigerated storage maintained their stability. PEG promoted PLA crystallization and lowered its glass transition temperature. High-content PEG modified films exhibited excellent UV shielding performance, and their transparency did not show a significant decline. Soil degradation tests revealed that the films modified with low molecular–weight PEG had a faster rate of mass loss. In all, PEG can markedly improve the toughness of PLA, but it necessitates carefully optimizing the molecular weight and content of PEG to balance the mechanical stability, optical performance, and environmental durability of the PEG/PLA films for practical applications. Moreover, to maintain the performance of the PEG/PLA films and for subsequent processing, storing them in the refrigerator is the best storage environment.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 43","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145237248","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

Microwave Irradiated Sunn Hemp/Epoxy Composites for Magnetic Resonance Imaging (MRI) Compatible Equipment 用于磁共振成像（MRI）兼容设备的微波辐照太阳麻/环氧复合材料

IF 2.8 3区化学

Journal of Applied Polymer Science Pub Date : 2025-07-22 DOI: 10.1002/app.57653

Chinmayee Dash, Ramyaranjan Das, Dillip Kumar Bisoyi

{"title":"Microwave Irradiated Sunn Hemp/Epoxy Composites for Magnetic Resonance Imaging (MRI) Compatible Equipment","authors":"Chinmayee Dash, Ramyaranjan Das, Dillip Kumar Bisoyi","doi":"10.1002/app.57653","DOIUrl":"https://doi.org/10.1002/app.57653","url":null,"abstract":"<div>\u0000 \u0000 <p>The present study investigates the effect of microwave (MW) irradiation of sunn hemp fiber (SH) on the viscoelastic and dielectric properties of their reinforced epoxy composites for magnetic resonance imaging (MRI) compatible equipment applications. SH is treated at different power and irradiation times; subsequently, their reinforced epoxy composites are fabricated using the hand lay-up technique. It is observed that the storage modulus of the composites increased by 38% due to the better interfacial interaction between the SH and epoxy. The glass transition temperature (<i>T</i>\u0000 <sub>g</sub>) of the SH/epoxy composites increased by 10 K due to MW irradiation, making it thermally more stable. Also, the water absorption percentage decreased from 8.8% to 3.9% by MW treatment of SH. From the dielectric study, it is observed that the dielectric constant (DC) and AC conductivity are both decreased in MW-treated composites due to the removal of polar groups from the SH structure by MW irradiation. The results demonstrate that MW treatment helps to minimize the interference of SH/epoxy composites with the MRI system while maintaining structural integrity.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 43","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145237406","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 Preparation and Performance of Low Water Absorption Thermal Insulation Coating Using Aluminate Coupling Agent-Modified Hollow Glass Microspheres 铝酸盐偶联剂改性中空玻璃微球制备低吸水隔热涂料及性能研究

IF 2.8 3区化学

Journal of Applied Polymer Science Pub Date : 2025-07-22 DOI: 10.1002/app.57642

Wentong Sun, Yiwen Sun, Xinru Zhang, Rui Li, Jingjie Han

{"title":"Study on Preparation and Performance of Low Water Absorption Thermal Insulation Coating Using Aluminate Coupling Agent-Modified Hollow Glass Microspheres","authors":"Wentong Sun, Yiwen Sun, Xinru Zhang, Rui Li, Jingjie Han","doi":"10.1002/app.57642","DOIUrl":"https://doi.org/10.1002/app.57642","url":null,"abstract":"<div>\u0000 \u0000 <p>This study addresses the critical deterioration of thermal efficiency, mechanical properties, adhesion strength, and corrosion resistance in waterborne insulation coatings (WICs) caused by excessive water absorption. Systematic immersion-aging tests revealed that heightened hydrophilicity originates from synergistic effects between hydrophilic film-forming polymers and interfacial defects at filler-matrix boundaries. A dual modification strategy was developed: polymer hybridization effectively reduced the resin's inherent water absorption, while surface modification of hollow glass microspheres (HGMs) with aluminate coupling agent (ACA) enhanced interfacial compatibility. Optimal loading of 30 wt% modified HGMs was determined through performance benchmarking, accompanied by rheological additive optimization ensuring exceptional storage stability. Custom-designed thermal barrier evaluations demonstrated sustained insulation capability and long-term thermal stability, validating the coating's durability. This work establishes systematic material design principles for high-performance WICs, providing a technically viable solution for industrial applications requiring balanced thermal resistance and environmental durability.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 42","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145196987","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

Decoding Material Compatibility in Plastics and Rubbers Exposed to Ammonia-DME Transportation Fuels 破译暴露于氨-二甲醚运输燃料的塑料和橡胶的材料相容性

IF 2.8 3区化学

Journal of Applied Polymer Science Pub Date : 2025-07-22 DOI: 10.1002/app.57666

Yuxiao Qiu, Yuanqing Qu, Cong Zhang, Dong Han, Zhen Huang

{"title":"Decoding Material Compatibility in Plastics and Rubbers Exposed to Ammonia-DME Transportation Fuels","authors":"Yuxiao Qiu, Yuanqing Qu, Cong Zhang, Dong Han, Zhen Huang","doi":"10.1002/app.57666","DOIUrl":"https://doi.org/10.1002/app.57666","url":null,"abstract":"<div>\u0000 \u0000 <p>Zero- or low-carbon fuels could reduce the reliance on fossil fuels and the CO<sub>2</sub> emissions of internal combustion engines. However, the employment of these environmentally friendly fuels will pose challenges for sealing materials in existing fuel supply systems. This study investigates the material compatibility of ammonia-DME blends with common sealing materials, including 6 rubbers and 4 plastics. The changes in mechanical properties and micro-morphology of the materials were evaluated by immersion experiments coupled with molecular simulation calculations. Most rubbers exhibit a decrease in hardness and tensile strength after immersion in ammonia-DME blends. Silicone rubber has the outstanding comprehensive properties after ammonia immersion, demonstrating a moderate volume expansion upon immersion while maintaining minimal variations in both hardness and tensile strength. Among plastics, polyvinyl chloride has poor compatibility after immersion in both pure ammonia and ammonia-DME blends. This phenomenon is primarily attributed to the instability of halogen groups, which is susceptible to reactions with ammonia or DME, resulting in structural degradation consequently. Through the analysis of molecular compatibility simulations, it becomes clear that chemical reactions play a dominant role in determining material compatibility. This highlights that the damaging effects of chemical reactions on the internal structure far exceed those caused by physical dissolution.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 43","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145237250","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

Data-Driven Modeling for Predicting Tribo-Performance of Flax-Steel-Epoxy Hybrid Composites Using Machine Learning Approach 用机器学习方法预测亚麻-钢-环氧复合材料摩擦性能的数据驱动模型

IF 2.8 3区化学

Journal of Applied Polymer Science Pub Date : 2025-07-20 DOI: 10.1002/app.57634

Subham Kumar Bhoi, Sourav Kumar Mahapatra, Alok Satapathy

{"title":"Data-Driven Modeling for Predicting Tribo-Performance of Flax-Steel-Epoxy Hybrid Composites Using Machine Learning Approach","authors":"Subham Kumar Bhoi, Sourav Kumar Mahapatra, Alok Satapathy","doi":"10.1002/app.57634","DOIUrl":"https://doi.org/10.1002/app.57634","url":null,"abstract":"<div>\u0000 \u0000 <p>Machine learning (ML) models have recently become popular for their ability to replicate human decision-making in different fields. This study presents a data-driven machine learning method for the analysis and prediction of sliding wear behavior of flax-epoxy hybrid composites, both with and without steel mesh. Three hybrid composites with different stacking sequences of reinforcing fibers are prepared and subsequently well-planned sliding wear trials are conducted according to the design of experiments. The experimental analysis examined the influence of sliding velocity, sliding distance, and normal load on the specific wear rate, revealing that wear rate increases with higher sliding velocity and normal load but decreases with higher steel mesh content. The collected data is then utilized to train four ML models, whose performances are measured using five different metrics. Among them, the extreme gradient boosting (XGB) model showed the best accuracy, with coefficient of determination (R<sup>2</sup>) values of 0.93651 for composite F11, 0.98544 for composite F7S4, and 0.97546 for composite F4S7. Feature importance analysis revealed sliding velocity as the most significant factor. Electron microscopy is further utilized to study predominant wear mechanisms.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 42","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145196934","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

Marine Degradation and In Vitro Biodegradation of PLA-TPS Blends PLA-TPS共混物的海洋降解和体外生物降解

IF 2.8 3区化学

Journal of Applied Polymer Science Pub Date : 2025-07-20 DOI: 10.1002/app.57674

Daniel C. Licea-Saucedo, Brittany DeNicholas, Trevor Harding, Guillermo Aguilar-Osorio, Rubén González-Núñez

{"title":"Marine Degradation and In Vitro Biodegradation of PLA-TPS Blends","authors":"Daniel C. Licea-Saucedo, Brittany DeNicholas, Trevor Harding, Guillermo Aguilar-Osorio, Rubén González-Núñez","doi":"10.1002/app.57674","DOIUrl":"https://doi.org/10.1002/app.57674","url":null,"abstract":"<div>\u0000 \u0000 <p>In this study, poly(lactic acid) (PLA) and thermoplastic starch (TPS) with chain extender and compatibilizer are prepared by twin screw extrusion. The compounds are thermally compressed at 185°C using a square mold. The blends are subjected to marine degradation and in vitro biodegradation techniques based on solid-state and liquid-state fermentations by fungi and bacteria. The performance of PLA and PLA-TPS blends under marine conditions is evaluated in terms of mechanical and thermal properties. The results show that this material is not biodegradable in marine conditions due to PLA content and needs specific conditions for biodegradation. However, the solid-state assay gives a visual answer to the question of biodegradability, since fungal or bacterial growth translates to the sample being used as a carbon source. In addition, the liquid-state fermentation provides quantitative results for biodegradation, expressed as percentage, biomass, residual mass, and protein secretion. These techniques may offer insight into the potential of materials to be considered biodegradable or compostable. The duration of the experiments is significantly lower (6 days) than that reported in the literature and the standardized tests (90 days).</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 43","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145237184","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

UV Grafting of Novel Copolymer on Polyolefin Nonwoven Separator for Rechargeable Alkaline Nickel-Zinc Battery 新型共聚物在可充电碱性镍锌电池用聚烯烃非织造隔膜上的紫外接枝

IF 2.8 3区化学

Journal of Applied Polymer Science Pub Date : 2025-07-20 DOI: 10.1002/app.57655

Yong Wen Chek, Min Seok Cho, Pui Kee Lee, Bin Wang, Desmond Teck-Chye Ang

{"title":"UV Grafting of Novel Copolymer on Polyolefin Nonwoven Separator for Rechargeable Alkaline Nickel-Zinc Battery","authors":"Yong Wen Chek, Min Seok Cho, Pui Kee Lee, Bin Wang, Desmond Teck-Chye Ang","doi":"10.1002/app.57655","DOIUrl":"https://doi.org/10.1002/app.57655","url":null,"abstract":"<div>\u0000 \u0000 <p>Polyolefin nonwoven separators have been widely used in alkaline batteries. However, their hydrophobic nature limits wettability and electrolyte absorption, resulting in suboptimal battery performance. To address this, hydrophilic polymer such as polyacrylic acid is commonly grafted onto the polyolefin membranes. Despite this, alkaline zinc batteries with such separators often experience premature failure during cycling. This study aims to enhance the cycling stability of alkaline nickel-zinc (NiZn) batteries by UV-grafting novel copolymers of acrylic acid, styrene, and divinylbenzene onto nonwoven polyolefin membranes. The grafting was confirmed by FTIR, TGA, and FESEM-EDX analyses. Wettability improvements were assessed through electrolyte absorption, retention, and contact angle measurements. NiZn coin cell test showed a 10-fold improvement in cycle life with the copolymer-grafted separator compared to the polyacrylic acid-grafted separator and achieved a discharge capacity of 346 mAh/g at a charge/discharge rate of 0.3 C. Failure analysis revealed that the polyacrylic acid-grafted separator led to excessive ZnO adhesion on the separator, contributing to early cell failure. In contrast, the copolymer-grafted separator showed reduced ZnO adherence, contributing to enhanced cycling performance. This study demonstrates a simple yet effective modification of polyolefin separators with novel copolymer grafts, resulting in a significant improvement in the cycling performance of NiZn batteries.</p>\u0000 </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 43","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145237186","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

Solid State Polymerization on Poly(Lactic Acid)-Based Microcapsules: Process Parameters Adjustment in Order to Design Coumarin-6 Encapsulation System 固态聚合聚乳酸微胶囊：工艺参数调整以设计香豆素-6包封体系

IF 2.8 3区化学

Journal of Applied Polymer Science Pub Date : 2025-07-20 DOI: 10.1002/app.57630

Konstantina Chronaki, Anna Lamprinakou, Dimitrios M. Korres, Stamatina Vouyiouka

{"title":"Solid State Polymerization on Poly(Lactic Acid)-Based Microcapsules: Process Parameters Adjustment in Order to Design Coumarin-6 Encapsulation System","authors":"Konstantina Chronaki, Anna Lamprinakou, Dimitrios M. Korres, Stamatina Vouyiouka","doi":"10.1002/app.57630","DOIUrl":"https://doi.org/10.1002/app.57630","url":null,"abstract":"<p>Microencapsulation is a widely used technique for controlling the release of active compounds, protecting and/or improving their physical characteristics. Polymer molecular weight (MW) and thermal properties are associated with the effectiveness of the encapsulation system, as barrier properties change with the initial polymer. Recently, it was proved that Solid State Polymerization (SSP) can act as a post-encapsulation modification tool on poly(lactic acid) microcapsules (MCs). This study aims to improve the SSP process, study its kinetics, and transfer the gained knowledge to loaded with coumarin-6 microcapsules (LMCs). Herein, microcapsules (MCs) of two different molecular weight PLA grades (ca. 20,000 g/mol and ca. 45,000 g/mol) were prepared via double emulsion solvent evaporation technique. SSP process optimization involved screening of reaction temperature and pre-crystallization conditions. Then, SSP was performed for different durations in a fixed bed reactor, reaching molecular weight and crystallinity increases of up to 40% and 70% respectively. Regarding SSP kinetics, low molecular-weight MCs followed a power-law model with reaction order (<i>n</i>) 0.328, while high-molecular-weight MCs data fitted best to an end-group based expression for 2nd order kinetics. Transferring this gained knowledge to LMCs loaded with coumarin-6, the untreated PLA shell permitted almost 64% of the encapsulated compound to be released within 15 days, while the SSP treatment retarded the release, reaching almost 44% for the same period of time.</p>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 42","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/app.57630","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145196935","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