Macromolecular Chemistry and Physics最新文献_第10页

A Comprehensive Study on the Antimicrobial Activity of Polyhydroxybutyrate (PHB) Film Incorporated with Gallic Acid and Potassium Sorbate 没食子酸和山梨酸钾复合聚羟基丁酸（PHB）膜抗菌活性的综合研究

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-02-22 DOI: 10.1002/macp.202400243

Ajay Kumar P V, Rahul V R, Arul Manikandan, Nidhin Divakaran, Manoj Kumar, G. Pugazhenthi, Kannan Pakshirajan

{"title":"A Comprehensive Study on the Antimicrobial Activity of Polyhydroxybutyrate (PHB) Film Incorporated with Gallic Acid and Potassium Sorbate","authors":"Ajay Kumar P V, Rahul V R, Arul Manikandan, Nidhin Divakaran, Manoj Kumar, G. Pugazhenthi, Kannan Pakshirajan","doi":"10.1002/macp.202400243","DOIUrl":"https://doi.org/10.1002/macp.202400243","url":null,"abstract":"Polyhydroxybutyrate (PHB) has gained attention as an excellent packaging material due to its high crystallinity, biodegradability, low interaction with food matrices, and favorable mechanical properties. This study explores the development of PHB films incorporated with potassium sorbate (KS) and gallic acid (GA) via solvent casting, followed by a 30-day biodegradation test in soil. The films are analyzed for physicochemical and microbiological properties using X-ray diffraction, tensile testing, and disk diffusion assays. The soil-buried PHB films demonstrate accelerated biodegradation, likely driven by increased microbial and fungal activity, as well as moisture absorption. Incorporating KS and GA significantly enhances the antimicrobial efficacy of the films against both Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus, with greater inhibition observed against S. aureus. This difference may stem from the additional lipopolysaccharide membrane in E. coli. Field emission scanning electron microscopy (FESEM) of the films, both pre- and post-biodegradation, provides further insights into their structural changes. These findings underscore the potential of PHB antimicrobial films in advancing sustainable food packaging applications.","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"226 12","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144339199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Fabrication and Characterization of Multi-Stimuli-Responsive Hydrogels with Robust Mechanical Properties, Good Self-Healing, and Substrate Adhesiveness Using a Traditional Chemical Crosslinker and Initiator-Free Approach 采用传统化学交联剂和无引发剂方法制备具有稳健机械特性、良好自愈合性和基底粘附性的多刺激响应水凝胶并确定其特性

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-02-22 DOI: 10.1002/macp.202400471

Mulenga Kalulu, Olayinka Oderinde, Christopher Mwanza, Shephrah O. Ogungbesan, Muzammal Hussain, Guodong Fu

{"title":"Fabrication and Characterization of Multi-Stimuli-Responsive Hydrogels with Robust Mechanical Properties, Good Self-Healing, and Substrate Adhesiveness Using a Traditional Chemical Crosslinker and Initiator-Free Approach","authors":"Mulenga Kalulu, Olayinka Oderinde, Christopher Mwanza, Shephrah O. Ogungbesan, Muzammal Hussain, Guodong Fu","doi":"10.1002/macp.202400471","DOIUrl":"https://doi.org/10.1002/macp.202400471","url":null,"abstract":"Hydrogels are essential in various applications, including biomedical fields, robotics, sensors, and wearable technologies. Traditional fabrication methods often involve chemical crosslinkers and initiators, which can introduce toxicity and limit practical use. This study presents an innovative approach to creating multifunctional, multi-stimuli-responsive hydrogels without using these traditional components. By polymerizing AMPS, DMAA, and MAA monomers using environmentally friendly AlCl3·6H2O as a crosslinker via UV polymerization, the study produces hydrogels exhibiting good mechanical properties such as tensile strength (3.02 ± 0.12 MPa), toughness (20.01 ± 1.8 J m−3), superior stretchability (2182.4 ± 114% elongation), and good compression resistance in addition to possessing self-healing capabilities, ionic conductivity, and responsiveness to temperature, pH, and ionic strength. This innovative technique represents a significant advancement toward developing sustainable hydrogels suitable for diverse biomedical, robotic, and sensor, technology applications.","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"226 8","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Modafinil Synthesis Using an Eosin Y-photocatalytic Gel Formed by Autocatalyzed Thiol-Ene Crosslinking 自催化巯基烯交联形成的伊红y光催化凝胶合成莫达非尼

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-02-20 DOI: 10.1002/macp.202400468

Timothy Schmitt, Christian W. Pester

{"title":"Modafinil Synthesis Using an Eosin Y-photocatalytic Gel Formed by Autocatalyzed Thiol-Ene Crosslinking","authors":"Timothy Schmitt, Christian W. Pester","doi":"10.1002/macp.202400468","DOIUrl":"https://doi.org/10.1002/macp.202400468","url":null,"abstract":"Utilizing visible wavelength photons to drive chemical transformations in photocatalysis has become increasingly popular due to the promise of sustainability, safety, and modularity. Heterogeneous photocatalysis further allows for simplified separation and reuse of photocatalysts from reaction systems. Described herein is a proof-of-concept for a heterogeneous catalysis platform based on an Eosin Y photocatalyst network (EY-gel) formed by an autocatalyzed thiol-ene crosslinking reaction. The Eosin Y photocatalyst is modified with an acrylate handle, allowing for both catalysis of and participation in the thiol-ene crosslinking reaction, thus incorporating the catalyst into the gel framework. The produced EY-gel takes the form of micron-sized spherical particles due to the use of a relative non-solvent for the gel components during the crosslinking reaction, allowing for collection through simple filtration. The EY-gel is shown to be effective for the synthesis of the narcolepsy drug Modafinil via the oxidation of 2-[(diphenylmethyl)thio]acetamide, and also shows modest recyclability over multiple use cycles.","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"226 8","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Recent Advances in Polymer Nanofibers for Optoelectronics Applications 聚合物纳米纤维光电子应用研究进展

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-02-20 DOI: 10.1002/macp.202400465

Sai Sun, Ting Kuang, Jinyong Li, Bin Zhang

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Search for Thiol-Protected Gold Clusters Doped with Different Elements Using Dendrimers 用树状大分子寻找掺杂不同元素的硫醇保护金簇

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-02-20 DOI: 10.1002/macp.202570009

Hisanori Muramatsu, Tetsuya Kambe, Takamasa Tsukamoto, Takane Imaoka, Kimihisa Yamamoto

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Frontiers of Functional Polymer Materials: In Honor of Prof. Nishide's 77th Birthday 功能高分子材料的前沿：纪念西出教授77岁生日

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-02-20 DOI: 10.1002/macp.202400518

Kenichi Oyaizu, Takeo Suga, Rigoberto C. Advincula

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High Refractive Index Aromatic and Ether-Containing Polythioureas: Improving Transparency and Mechanical Properties via Reciprocal Hydrogen Bonds 高折射率芳香族和含醚聚硫脲：通过互反氢键改善透明度和机械性能

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-02-20 DOI: 10.1002/macp.202400456

Seigo Watanabe, Yoshino Tsunekawa, Kenichi Oyaizu

{"title":"High Refractive Index Aromatic and Ether-Containing Polythioureas: Improving Transparency and Mechanical Properties via Reciprocal Hydrogen Bonds","authors":"Seigo Watanabe, Yoshino Tsunekawa, Kenichi Oyaizu","doi":"10.1002/macp.202400456","DOIUrl":"https://doi.org/10.1002/macp.202400456","url":null,"abstract":"A series of aromatic-aliphatic polythiourea copolymers bearing highly polarizable poly(4,4′-phenylsulfide thiourea) and hydrogen bond (H-bond) acceptor poly(ether thiourea) units are synthesized. The copolymers are highly refractive (nD = 1.78 at maximum) as a result of high sulfur content and lack of crystallinity and exhibit improved visible transparency (over 95%T in 1 µm thickness) compared to all-aromatic polythioureas. Further, the copolymers display higher fracture strength upon introducing 20–25 mol% of the poly(ether thiourea) unit, despite the inherent flexibility of ether groups. A detailed spectroscopic investigation indicates that this unique toughening behavior is attributed to the reciprocal (well compatible) intermolecular H-bonds intersected between aromatic and aliphatic thiourea moieties, as well as dynamic H-bond slipping/swapping between ether units and thiourea counterparts during the stretching process. These findings provide a rational strategy for simultaneously satisfying superior optical and mechanical properties, broadly applicable to various H-bond containing high refractive index polymers.","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"226 8","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/macp.202400456","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Luminescent Hybrid Material Based on the Europium(III)–β-Diketone Complex Doped with Smectite 蒙脱石掺杂铕(III) - β-二酮配合物的发光杂化材料

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-02-20 DOI: 10.1002/macp.202570007

Rong Cao, Ryota Nishiyama, Kazuki Nakamura, Norihisa Kobayashi

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Issue Information: Macromol. Chem. Phys. 4/2025 发布信息：Macromol。化学。理论物理的4/2025

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-02-20 DOI: 10.1002/macp.202570008

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Comparative Analysis of Two Elastic Types of Surface-Crosslinked Gelatin Nanoparticles as Suitable Systems for Macromolecular Drug Delivery 两种弹性型表面交联明胶纳米颗粒作为大分子药物递送系统的比较分析

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-02-20 DOI: 10.1002/macp.202400513

Armin W. Novak, Stefan V. Pochmann, Alexander Horn, Agnes-Valencia Weiss, Marc Schneider

{"title":"Comparative Analysis of Two Elastic Types of Surface-Crosslinked Gelatin Nanoparticles as Suitable Systems for Macromolecular Drug Delivery","authors":"Armin W. Novak, Stefan V. Pochmann, Alexander Horn, Agnes-Valencia Weiss, Marc Schneider","doi":"10.1002/macp.202400513","DOIUrl":"https://doi.org/10.1002/macp.202400513","url":null,"abstract":"With a steadily rising number of novel biopharmaceuticals in development, the demand for applicable delivery systems for macromolecular drugs persists. Polymeric nanoparticles, consisting of the natural product gelatin, present beneficial attributes for this application. To stabilize those nanoparticles without interfering with encapsulated macromolecules, surface-crosslinked gelatin particles are developed and thoroughly characterized for their physicochemical and mechanical properties. With only limited data available for the latter, investigating the elastic properties can offer a more comprehensive understanding of the crosslinking processes involved and of the gelatin particles’ potential applications. In this study, protocols for surface-crosslinked gelatin particles type A (GNP-A) and B (GNP-B) are described. Significant differences between the two types of gelatin are reported regarding their physicochemical and mechanical properties. GNP-A consists of a lower crosslinking degree, leading to pronounced swelling in aqueous environments and softer nanoparticles. They possess contrary properties compared to the more extensively crosslinked and stiffer GNP-B. However, this doesn't affect encapsulation efficiency, allowing to develop nanoparticulate systems suitable for various applications by adjusting the particle properties while maintaining the same drug load. These findings provide a deeper understanding of polymeric gelatin particles and reveal the importance of investigating the mechanical properties of drug delivery systems during pharmaceutical development.","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"226 10","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/macp.202400513","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144091625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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