Macromolecular Materials and Engineering最新文献_第6页

Conductivity Insights Into the Carbon Nanotubes Mobility Restricted by the Long-Branched Chains During the Thermal Annealing, Fast Shear Flow and Melt to Solid Cooling Process

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-10-25 DOI: 10.1002/mame.202400264

Jixiang Li, Abderrahim Maazouz, Khalid Lamnawar

{"title":"Conductivity Insights Into the Carbon Nanotubes Mobility Restricted by the Long-Branched Chains During the Thermal Annealing, Fast Shear Flow and Melt to Solid Cooling Process","authors":"Jixiang Li, Abderrahim Maazouz, Khalid Lamnawar","doi":"10.1002/mame.202400264","DOIUrl":"https://doi.org/10.1002/mame.202400264","url":null,"abstract":"The present work provides a unique insight to reveal the long chain branching (LCB) influence to the nano-fillers, that is via analyzing the conductivity evolution during the thermal annealing, fast shear flow and melt to solid cooling process. Meanwhile the crystallization behavior is also discussed. A linear polypropylene (PPC) and a long chain branched polypropylene (PPH) are chosen as the two polymer matrices with carbon nanotubes (CNTs) as the nanofillers. During the thermal annealing process, a more obvious growth of electrical conductivity of linear PPC nanocomposites are observed compared with LCB PPH nanocomposites. The harder movement of CNTs inside LCB PPH matrix may be the main reason. This also can be reflected by the conductivity evolution during slow cooling process where a decrease-then-increase (DTI) phenomenon is found for PPC/CNTs systems due to the rebuilding of CNTs conductivity network after crystallization. By contrast, this does not happen for PPH/CNTs systems.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"310 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400264","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143119428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Detailed Compositional and Structure–Property Analysis of Ethylene Oxide-Propylene Oxide Triblock Copolymers

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-10-24 DOI: 10.1002/mame.202400297

Gergő Róth, Tibor Nagy, Ákos Kuki, Levente Novák, Dávid Nyul, Miklós Zsuga, Sándor Kéki

{"title":"Detailed Compositional and Structure–Property Analysis of Ethylene Oxide-Propylene Oxide Triblock Copolymers","authors":"Gergő Róth, Tibor Nagy, Ákos Kuki, Levente Novák, Dávid Nyul, Miklós Zsuga, Sándor Kéki","doi":"10.1002/mame.202400297","DOIUrl":"https://doi.org/10.1002/mame.202400297","url":null,"abstract":"The polyethylene oxide-polypropylene oxide (PEO-PPO) based triblock copolymers are notable amphiphilic copolymers with a diverse range of applications. The presence of homo-, and/or diblock impurities in copolymers with PEO-PPO-PEO triblock has been demonstrated. This finding suggests that the samples are blends rather than pure triblock copolymers. Furthermore, copolymers with triblock copolymer content of 0 or less than 20% by molar percentage have been identified. The hydrophilic-lipophilic balance (HLB) is also calculated based on the exact composition of the blends. The effect of HLB values and compositional data on the initial foam height (in casein solution), the surface tension, and the contact angle are investigated. The correlation coefficients for the PPO-PEO-PPO copolymers versus HLB values are found to be high, while those obtained for the PEO-PPO-PEO copolymers versus values of HLB are significantly lower. The lower correlation coefficients for the PEO-PPO-PEO samples can be attributed to the presence of homo- and diblock (co)polymer contaminants. In addition, a linear regression model has been constructed to find a mathematical relationship between the percentage of ethylene oxide, the average number of propylene oxide units, and the properties of the copolymer.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"310 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400297","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143118765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An Injectable IPN Nanocomposite Hydrogel Embedding Nano Silica for Tissue Engineering Application

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-10-24 DOI: 10.1002/mame.202400242

Ali Kakapour, Saied Nouri Khorasani, Shahla Khalili, Mahshid Hafezi, Mehdi Sattari-Najafabadi, Mahsa Najarzadegan, Samin Saleki, Shadab Bagheri-Khoulenjani

{"title":"An Injectable IPN Nanocomposite Hydrogel Embedding Nano Silica for Tissue Engineering Application","authors":"Ali Kakapour, Saied Nouri Khorasani, Shahla Khalili, Mahshid Hafezi, Mehdi Sattari-Najafabadi, Mahsa Najarzadegan, Samin Saleki, Shadab Bagheri-Khoulenjani","doi":"10.1002/mame.202400242","DOIUrl":"https://doi.org/10.1002/mame.202400242","url":null,"abstract":"Gelatin methacrylate (GM) and sodium alginate (SA) are two biomaterials that have been widely employed in tissue engineering, particularly in 3D bioprinting. However, they have some drawbacks including undesirable physico-mechanical properties and printability, hindering their application. This work developed an interpenetrating polymeric network (IPN) of GM and SA reinforced with silica nanoparticles (SNPs) to deal with hydrogels’ drawbacks. Besides, for cross-linking, visible light is used as an alternative to UV light to prevent disruptions in cellular metabolism and immune system reactions. Four GM/SA/SNP hydrogels different in SNPs concentration (0, 0.5, 1, and 2 w/w%) are studied. The performance of the hydrogels is evaluated in terms of physico-mechanical properties (viscoelasticity, compressive modulus, degradation, and swelling), rheological properties, and biological properties (fibroblast cell growth and adhesion, and MTT assay). The results demonstrated that the GM/SA/SNP hydrogel with 1% SNPs provided desirable physical (645% swelling and 59.3% degradation), mechanical strength (270 kPa), rheological (tan δ of almost 0.14), and biological performances (≈98% viability after 3 days) while maintaining appropriate printability. The findings suggest that the GM/SA/SNP hydrogel holds great potential for applications in soft tissue regeneration.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"310 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400242","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143118764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Adhesive Properties of Eco-Friendly Hot Melt Adhesive Based on Poly(butylene adipate-co-terephthalate) and Rosin Maleic Resin 基于聚己二酸丁二醇酯和马来酸松香树脂的环保型热熔胶的粘合性能

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-10-24 DOI: 10.1002/mame.202400103

Ji-Hyun Cho, Kwang-Hyun Ryu, Hyun-Joong Kim

{"title":"Adhesive Properties of Eco-Friendly Hot Melt Adhesive Based on Poly(butylene adipate-co-terephthalate) and Rosin Maleic Resin","authors":"Ji-Hyun Cho, Kwang-Hyun Ryu, Hyun-Joong Kim","doi":"10.1002/mame.202400103","DOIUrl":"https://doi.org/10.1002/mame.202400103","url":null,"abstract":"As environmental problems increase, disposable products are being replaced and recommended with materials with a low environmental load when it discarded. So the demand for bioplastics for building a sustainable society is increasing. This study focuses mainly on the applicability of biodegradable plastics and rosin maleic resin (RMR, DX-250) blends with potential use in eco-friendly hot-melt adhesives (HMA). Poly (butylene adipate-co-terephthalate) (PBAT), which has high dimensional stability owing to low crystallinity, is used as the main polymer of the HMA. And rosin maleic resin, which is effective for increasing adhesive properties and compatibility as a tackifier. The HMA based on PBAT and RMR blends are prepared via melt-blend extrusion. Compatibility and wettability are increased under the influence of RMR, and adhesion properties are improved, compared to that of PBAT. In addition, as confirmed polarizing microscope (POM), the addition of RMR leads to a decrease in crystallinity, which can be expected to be effective for biodegradation. This result PBAT/RMR 7/3 blend significantly enhances the adhesion strength of PBAT from 1.8 to 7.3 MPa. Therefore, PBAT with the blends containing 30 wt.% of RMR has considerable potential application in the HMA field.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"309 12","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400103","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142861959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

In Vitro Neuroprotective Effect Evaluation of Donepezil-Loaded PLGA Nanoparticles-Embedded PVA/PEG Nanofibers on SH-SY5Y Cells and AP-APP Plasmid Related Alzheimer Cell Line Model

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-10-24 DOI: 10.1002/mame.202400160

Ece Guler, Humeyra Betul Yekeler, Burcu Uner, Murat Dogan, Asima Asghar, Fakhera Ikram, Yusufhan Yazir, Oguzhan Gunduz, Deepak M Kalaskar, Muhammet Emin Cam

{"title":"In Vitro Neuroprotective Effect Evaluation of Donepezil-Loaded PLGA Nanoparticles-Embedded PVA/PEG Nanofibers on SH-SY5Y Cells and AP-APP Plasmid Related Alzheimer Cell Line Model","authors":"Ece Guler, Humeyra Betul Yekeler, Burcu Uner, Murat Dogan, Asima Asghar, Fakhera Ikram, Yusufhan Yazir, Oguzhan Gunduz, Deepak M Kalaskar, Muhammet Emin Cam","doi":"10.1002/mame.202400160","DOIUrl":"https://doi.org/10.1002/mame.202400160","url":null,"abstract":"Recently developed nanoparticles and nanofibers present new brain-specific treatment strategies, especially for Alzheimer's disease treatment. In this study, donepezil (DO)-loaded PLGA nanoparticles (DNP) are embedded in PVA/PEG nanofibers (DNPF) produced by pressurized gyration for sublingual administration. SEM images showed produced drug-loaded and pure nanofibers, which have sizes between 978 and 1123 nm, demonstrated beadless morphology and homogeneous distribution. FT-IR, XRD, and DSC results proved the produced nanoparticles and fibers to consist of the DO and other polymers. The in vitro drug release test presented that the release profile of DO is completed at the end of the 18th day. It is released by the first order kinetic model. DNPF has an ultra-fast release profile via its disintegration within 2 sec, which proved itself to be suitable for the administration sublingually. All samples presented above ≈90% cell viability via their non-toxic natures on SH-SY5Y human neuroblastoma cells by using Alamar blue assay. The anti-Alzheimer effects of DO, DNP, and DNPF are evaluated on the Aβ1−42-induced SH-SY5Y cells at 1, 5, and 10 µM as treatment groups. The 1 µM dosage exhibited the most significant neuroprotective effects, which showed enhanced cellular uptake and superior modulation of Alzheimer's-related proteins, including tau and Aβ.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"310 3","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400160","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143602782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimizing Electron-Beam Photothermal Pyrolysis Parameters for Enhanced Molecular Biodegradability of Polyvinyl Chloride Plastics

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-10-18 DOI: 10.1002/mame.202400257

Rishika Porandla

{"title":"Optimizing Electron-Beam Photothermal Pyrolysis Parameters for Enhanced Molecular Biodegradability of Polyvinyl Chloride Plastics","authors":"Rishika Porandla","doi":"10.1002/mame.202400257","DOIUrl":"https://doi.org/10.1002/mame.202400257","url":null,"abstract":"Polyvinyl chloride (PVC), a synthetic plastic notable for harmful emissions during deterioration, has potential to be molecularly adjusted by photo-oxidative ultraviolet degradation. This research investigates the influence of electron beam irradiation and near-infrared photothermal treatment utilizing gold nanoparticles to establish the optimized molecular weight and beam time exposure for biodegradable PVC properties while maintaining a minimum tensile strength as measured through the ratio of peak tension force by cross sectional area. PVC powder samples with number-average molecular weights ranging from 20.0 to 90.0 kDa and varying exposure times of a 100 kGy electron beam from 80 to 115 ms are employed for the study. Outcomes from PVC irradiation reveal the optimal parameters for inducing biodegradability in samples: an e-beam exposure duration of 95 ms applied to PVC powder with a sample molecular weight of 20.0 kDa. Analysis of the ratio of number average molecular weight <math>\u0000 <semantics>\u0000 <msub>\u0000 <mi>M</mi>\u0000 <mi>n</mi>\u0000 </msub>\u0000 <annotation>$ {{M}_{mathrm{n}}} $</annotation>\u0000 </semantics></math> and weight average molecular weight <math>\u0000 <semantics>\u0000 <msub>\u0000 <mi>M</mi>\u0000 <mi>w</mi>\u0000 </msub>\u0000 <annotation>$ {{M}_{mathrm{w}}} $</annotation>\u0000 </semantics></math> demonstrates that shorter irradiation durations result in lower molecular weights and molecular weight is directly proportional to Tg and crystallinity. Future work aims to scale up the procedure to industrial applications and investigate the treatment's applicability to a variety of thermoplastics.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"310 2","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400257","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

CO2-Responsive Copolymers for Membrane Applications, Synthesis, and Performance Evaluation

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-10-18 DOI: 10.1002/mame.202400290

Emil Pashayev, Prokopios Georgopanos

{"title":"CO2-Responsive Copolymers for Membrane Applications, Synthesis, and Performance Evaluation","authors":"Emil Pashayev, Prokopios Georgopanos","doi":"10.1002/mame.202400290","DOIUrl":"https://doi.org/10.1002/mame.202400290","url":null,"abstract":"The urgent need to mitigate climate change has spurred research into innovative carbon dioxide (CO2) capture materials. In this study, the design and synthesis of CO2-responsive diblock copolymers, poly (N-[3-(dimethylamino)propyl]-acrylamide)-b-poly(methyl methacrylate) (PDMAPAm-b-PMMA) are focused on via a two-step reversible addition−fragmentation chain-transfer (RAFT) polymerization as well as the application of the synthesized diblock copolymer as a membrane for CO2 capture. The resulting diblock copolymer possesses distinct blocks with varying properties. The poly (N-[3-(dimethylamino)propyl]-acrylamide) (PDMAPAm) block provides CO2-responsive behavior, while the poly(methyl methacrylate) (PMMA) block contributes to mechanical stability. The gas transport properties of the fabricated thin-film composite membrane made of PDMAPAm-b-PMMA are measured. It is determined that the copolymer exhibits dual responsiveness towards CO2 and can be tailored for use in fabrication of membranes for direct air capture (DAC).","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"310 2","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400290","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fabricating Biodegradable Tissue Scaffolds Through a New Aggregation Triggered Physical Cross-Linking Strategy of Hydrophilic and Hydrophobic Polymers 通过亲水性和疏水性聚合物的新聚合触发物理交联策略制造生物可降解组织支架

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-10-15 DOI: 10.1002/mame.202470019

Elif Kaga, Sadik Kaga

引用次数: 0

Masthead: Macromol. Mater. Eng. 10/2024 刊头：Macromol.Mater.Eng.10/2024

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-10-15 DOI: 10.1002/mame.202470020

引用次数: 0

Intrinsically Flame-Retardant Polyamide 6 by Anionic Ring-Opening Copolymerization with a Phosphorous-Containing Comonomer

IF 4.2 3区材料科学

Macromolecular Materials and Engineering Pub Date : 2024-10-14 DOI: 10.1002/mame.202400253

Carlo Pani, Hagen J. Altmann, Patrick Probst, Iris Elser, Mark Steinmann, Simon König, Philipp Kreis, Lisa Kuske, Dominik Weidich, Anke Gähr, Jonas Groos, Julian Kappler, Janis Musso, Dongren Wang, Michael R. Buchmeiser

{"title":"Intrinsically Flame-Retardant Polyamide 6 by Anionic Ring-Opening Copolymerization with a Phosphorous-Containing Comonomer","authors":"Carlo Pani, Hagen J. Altmann, Patrick Probst, Iris Elser, Mark Steinmann, Simon König, Philipp Kreis, Lisa Kuske, Dominik Weidich, Anke Gähr, Jonas Groos, Julian Kappler, Janis Musso, Dongren Wang, Michael R. Buchmeiser","doi":"10.1002/mame.202400253","DOIUrl":"https://doi.org/10.1002/mame.202400253","url":null,"abstract":"A three-step synthetic route is established for the synthesis of a phosphorus-containing ε-caprolactam derivative, starting from cyclohex-2-enone and diphenylphosphinous chloride, followed by a Beckmann rearrangement. 2D NMR spectroscopy reveals that the phosphorus moiety is selectively localized at the 4-position of the caprolactam ring. Different amounts of the phosphorus-containing comonomer are systematically incorporated into polyamide 6 by anionic ring-opening copolymerization with ε-caprolactam at elevated temperatures. Polymerization reactions are initiated by a latent, CO2 protected N-heterocyclic carbene in the presence of N-acetyl caprolactam and MgCl2. The phosphorus content is determined by inductively-coupled plasma-optical emission spectroscopy (ICP-OES) analysis. Limiting oxygen indices up to 23.5 are found for polymers containing ≈1 wt.-% of phosphorus. The thermal properties of the copolymers are determined and compared to those of polyamide 6.","PeriodicalId":18151,"journal":{"name":"Macromolecular Materials and Engineering","volume":"310 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mame.202400253","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143115241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0