Macromolecular Chemistry and Physics最新文献_第5页

Efficient Stabilization and Directional-Controlled Release of Vitamin C in Disaccharide/Megasaccharide Composite Xerogels 二糖/多糖复合气凝胶中维生素 C 的高效稳定和定向控制释放

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2024-08-03 DOI: 10.1002/macp.202400125

Patinya Karoh, Maiko K. Okajima, Tatsuo Kaneko, Thapakorn Tree-Udom

{"title":"Efficient Stabilization and Directional-Controlled Release of Vitamin C in Disaccharide/Megasaccharide Composite Xerogels","authors":"Patinya Karoh, Maiko K. Okajima, Tatsuo Kaneko, Thapakorn Tree-Udom","doi":"10.1002/macp.202400125","DOIUrl":"10.1002/macp.202400125","url":null,"abstract":"Composite xerogel films with structural orientation, controlled swelling degree, and drug-release ability are prepared using biocompatible megamolecular liquid crystalline polysaccharide (sacran) secreted by a cyanobacterium Aphanothece sacrum. The sacran xerogel films (Sac-XFs) are formed by drying sacran aqueous solution including vitamin C (L-ascorbic acid, AA) and trehalose under various conditions. In X-ray diffraction and differential scanning calorimetry of Sac-XFs, diffractions or melting points of either AA or trehalose are not detected, indicating no crystal formation. Additionally, the stability of entrapped AA in Sac-XFs is evaluated through changes in film color and percentage loss, to indicate that AA stability is enhanced by entrapment in Sac-XFs in the presence of trehalose. Scanning electron microscopy of Sac-XFs reveals the morphological orientation, and number of striped lines along the longitudinal axis of film edges on side views while no visible textures in top views. When Sac-XFs are immersed in water, anisotropic swelling is observed, and anisotropy decreases with an increase in the drying temperature of the films. AA is released preferentially from the hydrogel sheet edges, indicating the direction-controlled release. Thus, the trehalose/sacran composite xerogels offer an alternative platform for preserving and controlled-releasing sensitive substances for fields of foods, pharmaceutics, and cosmetics.","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"225 20","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141968927","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}

引用次数: 0

A Novel Route to Glass Fiber‐Reinforced Epoxy Matrix Composites: Visible Light Activated Radical Induced Cationic Frontal Polymerization 玻璃纤维增强环氧基复合材料的新途径：可见光激活自由基诱导阳离子正面聚合

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2024-07-31 DOI: 10.1002/macp.202400080

Cenk Kurtulus, Mustafa Ciftci, Mehmet Atilla Tasdelen

引用次数: 0

Dual‐Crosslinked Antibacterial Hydrogel for Treatment of Diabetic Foot Ulcers 用于治疗糖尿病足溃疡的双交联抗菌水凝胶

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2024-07-30 DOI: 10.1002/macp.202400163

Zheng Zou, Zhen Zhang, Yang Gao, Huixian Yuan, Ting Guo, Chaoliang He, Xuesi Chen

引用次数: 0

Polymerization-Induced Emission and Specific Detection to Cu2+ Ions of Polyacrylates with Morpholine Structure 具有吗啉结构的聚丙烯酸酯的聚合诱导发射和对 Cu2+ 离子的特异性检测

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2024-07-30 DOI: 10.1002/macp.202400192

Yayu Feng, Enze Fan, Yunfei Liu, Rumeng Gao, Lin Wang, Kuilin Deng

{"title":"Polymerization-Induced Emission and Specific Detection to Cu2+ Ions of Polyacrylates with Morpholine Structure","authors":"Yayu Feng, Enze Fan, Yunfei Liu, Rumeng Gao, Lin Wang, Kuilin Deng","doi":"10.1002/macp.202400192","DOIUrl":"10.1002/macp.202400192","url":null,"abstract":"In this investigation, the fluorescent poly(N-hydroxyethyl morpholine acrylate) (PHEMA) and poly(N-hydroxypropyl morpholine acrylate) (PHPMA) are prepared and applied as fluorescent probes for the specific detection of Cu2+ ions. Far different from the non-fluorescent monomer, PHEMA and PHPMA emit a strong fluorescence at 410 nm due to the intramolecular aggregation of morpholine structures along macromolecular chains in the polymerization, indicating polymerization-induced emission (PIE). The fluorescent emission of PHPMA shows the dependence on external factors including solution concentration, excitation wavelength, solvent, and pH value. PHPMA specifically detects Cu2+ ions even in the presence of 16 common metal ions and 6 anions, with an LOD of 0.077 µM. In the fluorescent quenching, the O atom from ─C═O and N atom from morpholine moiety on the PHPMA chain participate in the complexation with Cu2+ ions with the ratio of the structural unit and Cu2+ ion of 2:1, leading to the dynamic quenching of PHPMA solution. As for the application, PIE-active PHPMA is easily made into a portable semi-quantitative filter paper with recyclability. In brief, the PIE-active PHPMA synthesized in this study can be used as a promising material for the specific detection of Cu2+ ions in industry, agriculture, and medicine fields.","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"225 20","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141872663","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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Preparation and Third-Order Nonlinear Optical Properties of Novel Axial Fullerenol-Substituted Phthalocyanines 新型轴向富勒烯醇取代酞菁的制备及其三阶非线性光学特性

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2024-07-30 DOI: 10.1002/macp.202400186

Rui Xu, Haonan Xu, Min Zhu, Wei Li, Yunhe Zhang

{"title":"Preparation and Third-Order Nonlinear Optical Properties of Novel Axial Fullerenol-Substituted Phthalocyanines","authors":"Rui Xu, Haonan Xu, Min Zhu, Wei Li, Yunhe Zhang","doi":"10.1002/macp.202400186","DOIUrl":"10.1002/macp.202400186","url":null,"abstract":"This research presents the optical limiting properties of a novel axially linked D-A type compound, LaPc-C60(OH)n, where lanthanide phthalocyanine serves as the donor and fullerenol as the acceptor. The incorporation of fullerenol expands the π-conjugated system, decreases the aggregation of the phthalocyanine, and significantly increases the solubility of the compound. The establishment of this D-A system promotes intramolecular electron transfer, effectively improving both the non-linear optical (NLO) response and optical limiting properties. In addition, homogeneous poly(methyl methacrylate) (PMMA) composite films (LaPc-C60(OH)n/PMMA) are prepared using a simple solution casting method. Compared to fullerenol or lanthanum phthalocyanine individually, LaPc-C60(OH)n exhibited a superior NLO response both in solution and in the solid composite film. In particular, LaPc-C60(OH)n/PMMA demonstrated an increase in the non-linear absorption coefficient (2050 cm GW−1) and a larger third-order magnetization (1.84 × 10−8 esu). In addition to exhibiting an excellent NLO response at 532 nm, LaPc-C60(OH)n also shows significant NLO enhancement at 1064 nm, extending the limiting range into the near-infrared region. This behavior is attributed to different nonlinear absorption mechanisms and the synergistic effect that arise from the photo-induced electron transfer process between the fullerenol and LaPc.","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"225 20","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141872670","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}

引用次数: 0

The Synthesis and Assembly of Mikto 8-Shaped Cyclic Diblock Polymers Mikto 8 型环状二嵌段聚合物的合成与组装

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2024-07-29 DOI: 10.1002/macp.202400237

Jinghang Wang, Yu Zhao, Hewen Liu

{"title":"The Synthesis and Assembly of Mikto 8-Shaped Cyclic Diblock Polymers","authors":"Jinghang Wang, Yu Zhao, Hewen Liu","doi":"10.1002/macp.202400237","DOIUrl":"10.1002/macp.202400237","url":null,"abstract":"Self-assembly behaviors of special topological polymers such as 8-figure shaped cyclic polymer are interesting, but are rarely reported so far due to the limited availability. In this work, mikto 8-figure shaped cyclic copolymers are synthesized with cinnamic acid dimer junctions, in which both rings possess diblock PSx-b-PEGy structures. Their self-assembly in water is investigated in comparison with their corresponding linear precursors. According to scanning electron microscopic (SEM) and transmission electron microscopic (TEM) observation, both of the mikto 8-figure shaped cyclic polymers and their corresponding linear precursors can form vesicles. But those formed from the former have very smooth surfaces, while those from the linear precursors have rugous surfaces. TEM observation shows that the linear precursors form loose vesicles. The size of micelles formed from 8-shaped cyclic copolymers is much smaller than that formed from the linear precursors. The topological structure exerts a significant influence on the solution aggregation behavior and provides broad ideas for the construction of precision solution aggregates.","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"225 22","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141872669","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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Surface Functionalization of Carbon Black for PEM Fuel Cell Electrodes 用于 PEM 燃料电池电极的炭黑表面功能化技术

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2024-07-26 DOI: 10.1002/macp.202400092

Ajay Kumar, Eun Joo Park, Yu Seung Kim, Jacob S. Spendelow

引用次数: 0

Determination of Propagation Rate Coefficients of 2-Hydroxyethyl Methacrylate in Aqueous Solution 测定甲基丙烯酸 2-羟乙基酯在水溶液中的传播速率系数

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2024-07-26 DOI: 10.1002/macp.202400159

Yuxiao Li, Wentao Liu, Kan Liu, Qingyue Wang, Xiaohui Li, Erlita Mastan, Yuanfeng Wu, Pingwei Liu, Bo Peng, Khak Ho Lim, Wen-Jun Wang

{"title":"Determination of Propagation Rate Coefficients of 2-Hydroxyethyl Methacrylate in Aqueous Solution","authors":"Yuxiao Li, Wentao Liu, Kan Liu, Qingyue Wang, Xiaohui Li, Erlita Mastan, Yuanfeng Wu, Pingwei Liu, Bo Peng, Khak Ho Lim, Wen-Jun Wang","doi":"10.1002/macp.202400159","DOIUrl":"10.1002/macp.202400159","url":null,"abstract":"Mechanistic understanding of free radical polymerization (FRP) in aqueous solution is hindered by the lack of kinetic coefficient data. Here, we investigated the propagation rate coefficient (kp) for FRP of HEMA in aqueous solution. The kp at 80 °C increased by 6 times as the monomer weight fraction in aqueous system decreases from 100 wt.% to 6 wt.%, that is., from 6.0 × 103 to 3.3 × 104 L·moL−1·s−1. This increase in kp is associated with the increase in pre-exponential factor (A), which suggests an increase in entropy with increasing water molecules in the polymerization system. To investigate the effect of solvent on kp, pulse-laser polymerization in solvents of different hydrogen bonding affinity, that is, 50 wt.% butyl propionate (BP) and dimethyl formamide (DMF), are conducted. The kp obtained are in order of kp,bulk∼kp,BP > kp,DMF, suggesting that the intermolecular hydrogen bonding at carbonyl moieties critically affects the geometry of transition state quasi-equilibrium in propagation. We underpinned this observation by analyzing the carbonyl and alkene moieties of HEMA in different solvents using infrared (IR) spectroscopy. The mechanistic analyses and insights relating to hydrogen bonding and functional moieties can be relevant for future studies involving non-aqueous solvents promoting hydrogen bonds.","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"225 19","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141779753","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}

引用次数: 0

Inference of Constitutive Relation of Phase-Separated Polymers by Integrating Physics-Informed Neural Networks and Symbolic Regression 通过整合物理信息神经网络和符号回归推断相分离聚合物的构效关系

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2024-07-24 DOI: 10.1002/macp.202400184

Yanlong Ran, Jiaqi An, Liangshun Zhang

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Reactively Processed Poly(butylene adipate terephthalate) Composite–Based Multilayered Films with Improved Properties for Sustainable Packaging Applications: Structural Characterization and Biodegradation Mechanism 用于可持续包装应用的反应加工聚（己二酸丁二醇酯）复合多层膜的性能改进：结构表征与生物降解机理

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2024-07-23 DOI: 10.1002/macp.202400067

Jayita Bandyopadhyay, Orebotse Joseph Botlhoko, Caroline Mphahlele, Rakgoshi Lekalakala, Sudhakar Muniyasamy, Suprakas Sinha Ray

{"title":"Reactively Processed Poly(butylene adipate terephthalate) Composite–Based Multilayered Films with Improved Properties for Sustainable Packaging Applications: Structural Characterization and Biodegradation Mechanism","authors":"Jayita Bandyopadhyay, Orebotse Joseph Botlhoko, Caroline Mphahlele, Rakgoshi Lekalakala, Sudhakar Muniyasamy, Suprakas Sinha Ray","doi":"10.1002/macp.202400067","DOIUrl":"10.1002/macp.202400067","url":null,"abstract":"In this study, it is attempted to enhance the properties and biodegradability of poly(butylene adipate terephthalate) (PBAT) using nanocomposite technology to meet the demand for sustainable packaging applications. Two nanoclays containing PBAT composites are reactively processed and integrated into the multilayered films. Reactive processing facilitates the dispersion and distribution of nanoclay particles in the PBAT matrix. The multilayered films comprising reactively processed PBAT composites exhibited a 24.5%–31.5% reduction in the oxygen transmission rate and improved dimensional stability and tensile properties. Moreover, the degradability of the multilayered film comprising reactively processed PBAT composites reached 82% in 180 days. In contrast, a neat PBAT film of similar thickness attained only 53% degradation in the same period. The biodegradation mechanism is proposed based on the topology of the disintegrated films studied using scanning electron microscopy, chemical bond vibrations determined by Fourier-transform infrared spectroscopy, and structural evolution by small- and wide-angle X-ray scattering (SWAXS). The SWAXS analysis is used to understand the changes in the degree of crystallinity, long-range periodic order, and crystalline and amorphous layer thickness of the multilayered films before and after degradation. Such multilayered films can find applications where packaging or biomedical devices cannot be recycled.","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"225 18","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/macp.202400067","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141779752","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