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Bisphenol-Modified Ternary Liquid Crystal Polyarylates with Low Dielectric Loss at High Frequencies 高频低介电损耗双酚改性三元液晶聚芳酯
IF 2.5 4区 化学
Macromolecular Chemistry and Physics Pub Date : 2025-03-03 DOI: 10.1002/macp.202400462
Hong Chen, Zhibo Huang, Qingyan Fan, Jinbao Guo
{"title":"Bisphenol-Modified Ternary Liquid Crystal Polyarylates with Low Dielectric Loss at High Frequencies","authors":"Hong Chen,&nbsp;Zhibo Huang,&nbsp;Qingyan Fan,&nbsp;Jinbao Guo","doi":"10.1002/macp.202400462","DOIUrl":"https://doi.org/10.1002/macp.202400462","url":null,"abstract":"<p>Thermotropic liquid crystalline polyarylates (TLCPs) with low dielectric loss at high frequencies have garnered significant attention due to their exceptional properties and high frequencies communication application. To investigate the influence of molecular structures on the dielectric constant and loss factor of TLCPs, 4,4′-dihydroxy diphenyl sulfone (SDP), 4,4′-dihydroxy diphenyl ether (ODP), 4,4′-dihydroxy diphenyl ketone (DHBP), and 4,4′-dihydroxy diphenyl sulfide (TDP) are introduced to copolymerize with 6-hydroxy-2-naphthoic acid (HNA) and terephthalic acid (TA) by one-pot melt polycondensation, which are defined as TLCP-I, TLCP-II, TLCP-III, and TLCP-IV, respectively. All prepared ternary TLCPs exhibit a nematic LC state between 300 and 350 °C, and the crystallinity of the modified TLCPs is reduced to a certain extent by introducing bisphenol moieties compared with the referenced polyarylate (TLCP-0) from 4-hydroxybenzoic acid (HBA) and HNA. Meanwhile, the consequent TLCPs exhibit good thermal stability, and the maximum weight loss rate temperature exceeds 500 °C. Furthermore, the initial storage modulus of TLCP-II, TLCP-III, and TLCP-IV films at room temperature are 1.2, 0.85, and 1.5 GPa, respectively, showing good tensile strength. Most importantly, the dielectric loss factors of TLCP-II, TLCP-III, and TLCP-IV are much less than 0.01 in the range of 1–10<sup>4</sup> kHz, thus suggesting an ideal low-dielectric-material candidate.</p>","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"226 9","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143905118","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
Chemical Modifications of Chitin and Chitosan Fibers and Filaments: A Review 几丁质和壳聚糖纤维和长丝的化学改性研究进展
IF 2.5 4区 化学
Macromolecular Chemistry and Physics Pub Date : 2025-03-03 DOI: 10.1002/macp.202400422
Ravishankar Kartik, Sremaan Muthusamy, Km Shelly, M. Surendiran
{"title":"Chemical Modifications of Chitin and Chitosan Fibers and Filaments: A Review","authors":"Ravishankar Kartik,&nbsp;Sremaan Muthusamy,&nbsp;Km Shelly,&nbsp;M. Surendiran","doi":"10.1002/macp.202400422","DOIUrl":"https://doi.org/10.1002/macp.202400422","url":null,"abstract":"<p>This review examines the chemical modifications of chitin and chitosan fibers and filaments, emphasizing their potential for diverse applications. It discusses a variety of modifications, including amidoximation, acetylation, partial deacetylation, <i>N-</i>maleation, <i>N-</i>naphthaloylation, <i>N-</i>halamination, grafting, oxidation, phosphorylation, sulfation, <i>N-</i>acylation, Schiff base formation, quaternization, nucleophilic substitution, hydroxyethylation, and ureidation transformations. These modifications significantly enhance the properties of chitin and chitosan, improving their solubility, dispersibility, hydrophobicity, environmental stability, mechanical strength, antimicrobial activity, and hemostatic capabilities, among other characteristics. By strategically tailoring these biopolymers through chemical modifications, novel materials with enhanced functionalities can be synthesized. These advanced materials are crucial for developing functional products with broad applications across various fields, spanning from biomedicine to sustainable composites.</p>","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"226 12","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144339488","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
Influence of Post-Synthesis Heat Treatments on the Molecular Structure and Thermal Stability of Phosphatized Starch 合成后热处理对磷酸淀粉分子结构和热稳定性的影响
IF 2.5 4区 化学
Macromolecular Chemistry and Physics Pub Date : 2025-02-28 DOI: 10.1002/macp.202400252
Florian Rothenhäusler, Felix Ludik, Rika Schneider, Felix Bretschneider, Beate Bojer, Helen Grüninger, Andreas Greiner, Holger Ruckdaeschel
{"title":"Influence of Post-Synthesis Heat Treatments on the Molecular Structure and Thermal Stability of Phosphatized Starch","authors":"Florian Rothenhäusler,&nbsp;Felix Ludik,&nbsp;Rika Schneider,&nbsp;Felix Bretschneider,&nbsp;Beate Bojer,&nbsp;Helen Grüninger,&nbsp;Andreas Greiner,&nbsp;Holger Ruckdaeschel","doi":"10.1002/macp.202400252","DOIUrl":"https://doi.org/10.1002/macp.202400252","url":null,"abstract":"<p>The threat of fires necessitates effective flame retardants (FR) to safeguard human life and property. In response to the demand for sustainable options, bio-based FR have emerged, with phosphatized starch (PS) standing out as a promising candidate. This study explores the influence of post-synthesis heat treatments on the molecular structure of PS to enhance its thermal stability for processing in polymeric matrix materials. The molecular structure of the flame-retardant PS is characterized via solid state and solution nuclear magnetic resonance spectroscopy, Fourier-transform infrared spectroscopy, and differential scanning calorimetry. Through a comprehensive analysis of results from thermo-gravimetric analysis, thermo-gravimetric Fourier-transform infrared spectroscopy, and elemental analysis, the thermal stability and thermal decomposition mechanisms of PS are investigated. The post-synthesis heat treatment leads to the decomposition of residual urea and carbamate groups, as well as to the formation of ammonium polyphosphates. By employing thermal modification, the thermal stability and phosphorus-content are enhanced.</p>","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"226 9","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/macp.202400252","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143905403","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
Fabrication and Properties of Gelatin/Glycyrrhizic Acid Double-Network Hydrogels with High Freeze Resistance 高抗冻性明胶/甘草酸双网水凝胶的制备及性能研究
IF 2.5 4区 化学
Macromolecular Chemistry and Physics Pub Date : 2025-02-27 DOI: 10.1002/macp.202400421
Runpeng Liu, Congde Qiao, Qinze Liu, Jing Xu, Jinshui Yao
{"title":"Fabrication and Properties of Gelatin/Glycyrrhizic Acid Double-Network Hydrogels with High Freeze Resistance","authors":"Runpeng Liu,&nbsp;Congde Qiao,&nbsp;Qinze Liu,&nbsp;Jing Xu,&nbsp;Jinshui Yao","doi":"10.1002/macp.202400421","DOIUrl":"https://doi.org/10.1002/macp.202400421","url":null,"abstract":"<p>A series of double-network hydrogels are fabricated from gelatin and glycyrrhizic acid (GA), and the influence of GA content on the mechanical properties of hydrogels is investigated. It is shown that the hydrogel containing 5% GA possessed the best mechanical performance. Then this hydrogel is soaked in K<sub>3</sub>Cit/ethylene glycol aqueous solutions and the effects of ethylene glycol concentration on the structure and properties of immersed hydrogels are explored. The results indicated that the as-obtained hydrogel demonstrated excellent freezing resistance due to the combination effects of ion hydration and hydrogen bonds. Moreover, the hydrophobic interactions between protein chains increased with an increase in ethylene glycol concentration. The strengthening of these interactions facilitated the formation of a triple helix structure in protein. As a result, the tensile strength and elongation at the break of the hydrogels are simultaneously improved. In addition, the long-term stability of the hydrogels is also enhanced by the introduction of ethylene glycol.</p>","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"226 8","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840772","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
High Precision Tuning of Limonene Polyamide via Side-Chain Functionalization for Specialized Applications 基于侧链功能化的柠檬烯聚酰胺高精度调谐
IF 2.5 4区 化学
Macromolecular Chemistry and Physics Pub Date : 2025-02-27 DOI: 10.1002/macp.202500021
Magdalena M. Kleybolte, Christopher P. Vogt, Malte Winnacker
{"title":"High Precision Tuning of Limonene Polyamide via Side-Chain Functionalization for Specialized Applications","authors":"Magdalena M. Kleybolte,&nbsp;Christopher P. Vogt,&nbsp;Malte Winnacker","doi":"10.1002/macp.202500021","DOIUrl":"https://doi.org/10.1002/macp.202500021","url":null,"abstract":"<p>Despite the success of conventional nylons in biomedicine, there is a growing demand for specialized materials tailored to modern needs. Tunable and sustainable bio-polyamides (PAs) derived from terpenes offer a promising alternative. This work focuses on limonene polyamide (<b>LiPA</b>) synthesized via anionic ring-opening polymerization (AROP) from limonene lactam and its functionalization via <i>a</i> thiol-ene click reaction. Optimizing the AROP enables the preparation of high molecular weight <b>LiPA</b> up to 54 kg mol<sup>−1</sup>, rendering the material attractive for further utilization. Subsequent exploration of the side-chain functionalization via thiol-ene click chemistry allows for the introduction of diverse functional groups (e.g., alkyl, ester, sulfonate) and finetuning of the polymers’ properties. The modifications give control over solubility, processability, hydrophilicity, and glass transition temperature (44–133 °C). While alkyl groups increase hydrophobicity, all PAs display hydrophilic surfaces (<i>q</i> &lt; 90°). Notably, the sulfonate-modified <b>LiPA</b> shows amphiphilic behavior, forming micelles in an aqueous solution, demonstrating potential for drug delivery applications. The high tolerance of the thiol-ene reaction towards various functional groups enables future incorporation of bioactive moieties, like cell-binding motifs for tissue engineering. In summary, this investigation demonstrates the tunability of <b>LiPA</b>’s properties through strategic side-chain modifications, paving the way for diverse biomedical applications.</p>","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"226 9","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143905186","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
Alkyl Side Chain Modulation of Non-Fused Polymerized Small Molecular Acceptors for Efficient All-Polymer Solar Cells 高效全聚合物太阳能电池中非熔融聚合小分子受体的烷基侧链调制
IF 2.5 4区 化学
Macromolecular Chemistry and Physics Pub Date : 2025-02-26 DOI: 10.1002/macp.202400464
Zhili Chen, Baoqi Wu, Bingyan Yin, Youle Li, Kangzhe Liu, Seoyoung Kim, Xiang Gao, Zhiliang Huang, Zhitian Liu, Changduk Yang, Fei Huang, Yong Cao, Chunhui Duan
{"title":"Alkyl Side Chain Modulation of Non-Fused Polymerized Small Molecular Acceptors for Efficient All-Polymer Solar Cells","authors":"Zhili Chen,&nbsp;Baoqi Wu,&nbsp;Bingyan Yin,&nbsp;Youle Li,&nbsp;Kangzhe Liu,&nbsp;Seoyoung Kim,&nbsp;Xiang Gao,&nbsp;Zhiliang Huang,&nbsp;Zhitian Liu,&nbsp;Changduk Yang,&nbsp;Fei Huang,&nbsp;Yong Cao,&nbsp;Chunhui Duan","doi":"10.1002/macp.202400464","DOIUrl":"https://doi.org/10.1002/macp.202400464","url":null,"abstract":"<p>Optimizing the morphology within the blends of polymer donors and acceptors is crucial for enhancing the performance of all-polymer solar cells (all-PSCs). Therefore, the development of rational strategies to modulate the aggregation behavior of polymers, thereby driving the formation of favorable morphology, holds great significance. In this study, two non-fused polymerized small molecular acceptors (PSMAs), PFBTz-OD and PFBTz-DT, featuring distinct alkyl side chains are designed and synthesized. Compared with PFBTz-OD, PFBTz-DT exhibits better solubility due to its longer alkyl side chains, resulting in higher molecular weight and favorable temperature-dependent aggregation characteristics in the solution. The all-PSC utilizing PBDB-T:PFBTz-DT attains a power conversion efficiency (PCE) of 9.74%, surpassing the PCE of the PBDB-T:PFBTz-OD device, which stands at 6.60%. The better performance is mainly attributed to the suitable compatibility between the donor and acceptor, which facilitates the formation of optimal phase separation. The proper phase separation, in turn, enhances exciton dissociation, increases the mobility of both electrons and holes and minimizes charge recombination. This study emphasizes how engineering the alkyl side chains influences the control of polymer acceptor aggregation in solution and molecular packing in the film, both of which are essential for optimizing the morphology and improving device performance.</p>","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"226 9","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143905420","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
Intelligent Optical Materials Based on Polymer Dispersed Cholesteric Liquid Crystals 基于聚合物分散胆甾液晶的智能光学材料
IF 2.5 4区 化学
Macromolecular Chemistry and Physics Pub Date : 2025-02-24 DOI: 10.1002/macp.202400496
Qi Guo, Chengwei Xiao, Yixi Liu, Meihui Yan, Yue Cao, Yuzhao Yang, Zhongke Yuan, Dingshan Yu, Xudong Chen
{"title":"Intelligent Optical Materials Based on Polymer Dispersed Cholesteric Liquid Crystals","authors":"Qi Guo,&nbsp;Chengwei Xiao,&nbsp;Yixi Liu,&nbsp;Meihui Yan,&nbsp;Yue Cao,&nbsp;Yuzhao Yang,&nbsp;Zhongke Yuan,&nbsp;Dingshan Yu,&nbsp;Xudong Chen","doi":"10.1002/macp.202400496","DOIUrl":"https://doi.org/10.1002/macp.202400496","url":null,"abstract":"<p>Cholesteric liquid crystals (CLCs), a class of photonic materials with multi-stimulus response and tunable photonic bandgaps (PBGs), exhibit the characteristics of selective and circularly polarized reflection properties due to helical assembly of supramolecules. To enhance their practical applicability, CLCs can be uniformly dispersed as microdroplets within polymer matrices, forming polymer dispersed cholesteric liquid crystals (PDCLCs). This composite system not only provides CLCs with essential mechanical stability but also enables enhanced multimodal responses through polymer matrix interactions. PDCLC materials have been widely used in the fields of dynamic displays, intelligent sensors, anti-counterfeiting systems and optical encryption devices. This review comprehensively surveys the fundamental properties, preparation methods, field-responsive behaviors and major applications of PDCLCs. Furthermore, the current challenges and future developments of PDCLCs are prospected to further promote scientific research and practical application of intelligent response materials.</p>","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"226 9","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143905217","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
Additive Manufacturing of Styrene-Isoprene-Styrene Block Copolymer Based Soft Thermoplastic Elastomeric Nanocomposites: Influence of Reduced Graphene Oxide on Microstructural, Mechanical and Functional Properties 苯乙烯-异戊二烯-苯乙烯嵌段共聚物基软热塑性弹性体纳米复合材料的增材制造:还原氧化石墨烯对微结构、力学和功能性能的影响
IF 2.5 4区 化学
Macromolecular Chemistry and Physics Pub Date : 2025-02-24 DOI: 10.1002/macp.202400409
Arun Kumar, Dhiraj Kumar Rana, Pulak Mohan Pandey, Chandi Sasmal, Shib Shankar Banerjee
{"title":"Additive Manufacturing of Styrene-Isoprene-Styrene Block Copolymer Based Soft Thermoplastic Elastomeric Nanocomposites: Influence of Reduced Graphene Oxide on Microstructural, Mechanical and Functional Properties","authors":"Arun Kumar,&nbsp;Dhiraj Kumar Rana,&nbsp;Pulak Mohan Pandey,&nbsp;Chandi Sasmal,&nbsp;Shib Shankar Banerjee","doi":"10.1002/macp.202400409","DOIUrl":"https://doi.org/10.1002/macp.202400409","url":null,"abstract":"<p>Additive manufacturing enables the customization of parts according to user requirements. However, additive manufacturing of soft polymeric materials using melt-based fused deposition modeling is challenging due to issues such as low column strength, high melt viscosity, poor adhesion with the print bed, and weak layer-to-layer adhesion. This work focused on the development of soft thermoplastic elastomeric nanocomposite materials based on reduced graphene oxide (rGO) and styrene-isoprene-styrene (SIS) triblock copolymer by direct ink writing (DIW) based additive manufacturing technique. The extrudability and printability of the developed SIS-rGO inks with varying rGO loading are investigated from shear viscosity and pressure drop analysis across different zones of the nozzle. Developed 3D printed nanocomposites showed good mechanical properties such as high elongation at break (≥ 2000%) and high tensile strength (5–11 MPa). Microstructures of 3D printed samples and the distribution of rGO nanosheets in the SIS matrix are analyzed from XRD and TEM. Dielectric constant of 3D printed nanocomposites increased ≈6 times for the 7 wt.% loaded rGO nanocomposite compared to the pristine SIS. Additionally, the electromagnetic interference shielding effectiveness (EMI SE) by absorption is also found to increase with rGO loading in the 3D-printed samples.</p>","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"226 12","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144339622","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
Phenolic Resins with Semi-Rigid Polymer Backbones Exhibiting LCST-Type Phase Separations in the Mixtures of Alcohols and Non-Polar Solvents 在醇类和非极性溶剂混合物中显示 LCST 型相分离的具有半刚性聚合物骨架的酚醛树脂
IF 2.5 4区 化学
Macromolecular Chemistry and Physics Pub Date : 2025-02-22 DOI: 10.1002/macp.202400460
Natsuki Inaba, Koki Takasu, Keitaro Matsuoka, Kazuki Sada
{"title":"Phenolic Resins with Semi-Rigid Polymer Backbones Exhibiting LCST-Type Phase Separations in the Mixtures of Alcohols and Non-Polar Solvents","authors":"Natsuki Inaba,&nbsp;Koki Takasu,&nbsp;Keitaro Matsuoka,&nbsp;Kazuki Sada","doi":"10.1002/macp.202400460","DOIUrl":"https://doi.org/10.1002/macp.202400460","url":null,"abstract":"<p>Research on lower critical solution temperature (LCST)-type thermo-responsive polymers has predominantly focused on those with flexible backbones, such as vinyl polymers, while rigid polymers have rarely been investigated due to their low solubility. Although some molecular designs for aqueous systems have been reported, molecular designs in organic media remain unclear due to the difficulty in achieving soluble states at low temperatures. The previous study demonstrates the molecular design for LCST-type phase separation in organic media based on the control of the solvation through the construction/deconstruction of hydrogen bonds, but only flexible vinyl polymers such as poly(4-hydroxystyrene) are investigated. In this study, it is aimed to extend the molecular design to rigid phenolic resins, TD-2131 and KA-1160, which contain phenolic groups in the main chain. TD-2131 and KA-1160 exhibited LCST-type phase separation in the mixture of 1-alcohol such as 1-hexanol and 1-octanol as hydrogen-bonding solvents and toluene or cyclohexane as non-polar solvents in appropriate mixing molar ratios. In mixtures of 1-alcohols and non-polar solvents, shorter-chain 1-alcohols necessitate higher molar ratios, while longer-chain 1-alcohols require lower ratios to induce LCST-type phase separations. These solubility trends mirror that observed in poly(4-hydroxystyrene), suggesting that the molecular design applies to both flexible and rigid polymer backbones.</p>","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":"143840722","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 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,&nbsp;Rahul V R,&nbsp;Arul Manikandan,&nbsp;Nidhin Divakaran,&nbsp;Manoj Kumar,&nbsp;G. Pugazhenthi,&nbsp;Kannan Pakshirajan","doi":"10.1002/macp.202400243","DOIUrl":"https://doi.org/10.1002/macp.202400243","url":null,"abstract":"<p>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.</p>","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}
引用次数: 0
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