Macromolecular Chemistry and Physics最新文献_第3页

[NVim]Br and Poly([NVim]Br-Co-AM): Synthesis and Effects on Inhibiting Clay Swelling and Dispersion and the Mechanisms [NVim]Br 和 Poly([NVim]Br-Co-AM)：合成、对抑制粘土膨胀和分散的作用及其机理

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2024-08-29 DOI: 10.1002/macp.202400141

Lan Li, Yanjun Ren, Rugang Yao, Hong Yang

{"title":"[NVim]Br and Poly([NVim]Br-Co-AM): Synthesis and Effects on Inhibiting Clay Swelling and Dispersion and the Mechanisms","authors":"Lan Li, Yanjun Ren, Rugang Yao, Hong Yang","doi":"10.1002/macp.202400141","DOIUrl":"10.1002/macp.202400141","url":null,"abstract":"To solve the downhole problems correlated with clay hydration swelling and dispersion under high-temperature conditions, a 1-aminoethyl-3-vinylimidazolium bromide ([NVim]Br) and a [NVim]Br/acrylamide copolymer (poly([NVim]Br-co-AM)) are synthesized and used as inhibitors. The molecular structures of [NVim]Br and poly([NVim]Br-co-AM) are characterized by FT-IR and 1H-NMR. The inhibition properties of [NVim]Br and poly([NVim]Br-co-AM) are evaluated by free swelling and dispersion tests, linear swelling, hot roll recovery experiments and thermogravimetric analyses.The inhibition mechanisms were revealed by X-ray diffraction, zeta potential, wettability analysis and ESEM observation. The results showed that both [NVim]Br and poly([NVim]Br-co-AM) has significantly superior inhibition performance compared with the common inhibitors KCl, polyether amine D230 and polyquaternium-7. Both [NVim]Br and poly([NVim]Br-co-AM) can resist 250 °C. [NVim]Br performed excellently in inihibiting both crystalline and osmotic swelling, which depended on the strong electrostatic adsorption and hydrogen bonds of imidazole cations and primary amine in [NVim]+. Poly([NVim]Br-co-AM) exerted excellent inhibition by minimizing osmotic swelling, reducing hydrophilicity and increasing clay bonding. The results are important for understanding the rational design of novel efficient inhibitors for drilling high-temperature shale formation.","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"225 21","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142177858","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 Carrageenan-Biopolymer Composite Microneedles for Interstitial Fluid Collection 用于间质液体收集的卡拉胶-生物聚合物复合微针的制作与特性分析

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2024-08-28 DOI: 10.1002/macp.202400160

Shreya Shashank Chauhan, Venkata Vamsi Krishna Venuganti

{"title":"Fabrication and Characterization of Carrageenan-Biopolymer Composite Microneedles for Interstitial Fluid Collection","authors":"Shreya Shashank Chauhan, Venkata Vamsi Krishna Venuganti","doi":"10.1002/macp.202400160","DOIUrl":"10.1002/macp.202400160","url":null,"abstract":"Identification of suitable polymeric materials to fabricate microneedles (MNs) for the collection of interstitial fluid (ISF) is a challenge. Here, characterization of different carrageenan-biopolymer composites for MN patch fabrication intended for ISF collection is reported. Systematic oscillatory rheological studies of composites containing iota-carrageenan mixed with alginate, gelatin, or pectin are performed to determine the linear viscoelastic region, gel point, tan delta, complex viscosity, and flow transition index. A polynomial equation is derived by relating flow transition index of biopolymer composites and compression strength of fabricated MNs. The biopolymer composite of iota-carrageenan and gelatin at 2% and 14%, respectively, and CaCl2 crosslinker (80 mm) shows the greatest compression strength sufficient for MNs insertion into the excised porcine skin. MNs swell up on application in an agarose gel model and the ex vivo excised porcine skin model to collect 36 ± 5 and 14 ± 1 µL of fluid within 10 min, respectively. Taken together, it is demonstrated that rheological analysis can be performed to select suitable polymer composites that possess sufficient strength for the skin insertion and swellability for ISF collection.","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"225 21","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142177860","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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Polymer Composite Electrolytes Membrane Consisted of Polyacrylonitrile Nanofibers Containing Lithium Salts: Improved Ion Conductive Characteristics and All‐Solid‐State Battery Performance 由含锂盐的聚丙烯腈纳米纤维组成的聚合物复合电解质膜：改善离子导电特性和全固态电池性能

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2024-08-28 DOI: 10.1002/macp.202400196

Yu Matsuda, Shun Nakazawa, Manabu Tanaka, Hiroyoshi Kawakami

{"title":"Polymer Composite Electrolytes Membrane Consisted of Polyacrylonitrile Nanofibers Containing Lithium Salts: Improved Ion Conductive Characteristics and All‐Solid‐State Battery Performance","authors":"Yu Matsuda, Shun Nakazawa, Manabu Tanaka, Hiroyoshi Kawakami","doi":"10.1002/macp.202400196","DOIUrl":"https://doi.org/10.1002/macp.202400196","url":null,"abstract":"Polymer electrolyte membranes with superior lithium‐ion (Li+) conductivity and sufficient electrochemical stability are desired for all‐solid‐state lithium‐ion batteries (ASS‐LIBs). This paper reports novel polymer composite membranes consisting of polyacrylonitrile (PAN) nanofibers (Nfs) containing lithium salts. It is first revealed that the lithium salt addition increases polar surface groups on the PAN nanofibers. Subsequently, the lithium salts‐containing PAN nanofiber (PAN/Li Nf) composite membrane affects the matrix poly(ethylene oxide) (PEO)/lithium bis(trifluoromethyl sulfonylimide) (LiTFSI) electrolyte to increase the numbers of Li+ with high mobility. Consequently, the PAN/Li Nf composite membrane shows relatively good ion conductivity (σ = 9.0 × 10−5 S cm−1) and a considerably large Li+ transference number (tLi+ = 0.41) at 60 °C, compared to the PEO/LiTFSI membrane without nanofibers. The 6Li solid‐state NMR study supports that the PAN/Li Nf bearing abundant polar nitrile groups at their surface enhances Li+ diffusion in the PEO‐based electrolyte membranes. The galvanostatic constant current cycling tests reveal that the PAN/Li Nf composite membrane possesses good electrochemical and mechanical stabilities. The ASS‐LIB consisting of the PAN/Li Nf composite membrane shows significantly improved charge and discharge cycling performances, promising future all‐solid‐state batteries.","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"157 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142177861","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 of Cross-Linked Polyimide Hollow Microspheres With Lightweight, Thermal Resistance and Controllable Size 制造轻质、耐热、尺寸可控的交联聚酰亚胺中空微球

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2024-08-28 DOI: 10.1002/macp.202400227

Yuntao Fu, Haichao Meng, Fenglin Wang, Huawei Zou, Yinfu Luo, Mei Liang, Peng Xie

{"title":"Fabrication of Cross-Linked Polyimide Hollow Microspheres With Lightweight, Thermal Resistance and Controllable Size","authors":"Yuntao Fu, Haichao Meng, Fenglin Wang, Huawei Zou, Yinfu Luo, Mei Liang, Peng Xie","doi":"10.1002/macp.202400227","DOIUrl":"10.1002/macp.202400227","url":null,"abstract":"Polyimide (PI) hollow microspheres possess lightweight and excellent thermal resistance, which are widely used in microreactors, catalysis, adsorption separation, high-temperature insulation, and so on. In this manuscript, PI hollow microspheres are fabricated by constructing a crosslinked structure combined with gradient heating. The formation of PI hollow microspheres includes gas nucleation, expansion, and imidization. The PI hollow microspheres size is controlled by adjusting polyester ammonium salts size, and microspheres size is distributed in 309–956 µm. PI hollow microspheres have lightweight, excellent heat resistance and carbonization performance, bulk density, initial decomposition temperature, and weight residue at 800 °C is 87.3–178.6 kg m−3, 533.6 °C and 59.8%. The PI hollow microspheres have potential applications in high-temperature resistant and multifunctional composite materials preparation. Moreover, this method is simple, efficient, and highly operable, which can be used for large-scale production of PI hollow microspheres.","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"225 22","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142177859","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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Eco-Friendly, Recyclable Supramolecular Inks Incorporating Multi-Walled Carbon Nanotubes 含有多壁碳纳米管的环保型可回收超分子油墨

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2024-08-26 DOI: 10.1002/macp.202400188

Chunxiao Ding, Meng Bai, Ruirui Liu, Xinyue Zhang, Ning Ma, Alaa S. Abd-El-Aziz

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Aryl‐Ether‐Free Polyaromatics‐Based Alkaline‐Resistant Anion exchange PTFE Composite Membrane 不含芳基醚的聚芳烃基抗碱性阴离子交换聚四氟乙烯复合膜

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2024-08-22 DOI: 10.1002/macp.202400215

Rikhil R. Iyer, Karteek Boga, Joseph F. Varga, Huanting Wang, Kei Saito

{"title":"Aryl‐Ether‐Free Polyaromatics‐Based Alkaline‐Resistant Anion exchange PTFE Composite Membrane","authors":"Rikhil R. Iyer, Karteek Boga, Joseph F. Varga, Huanting Wang, Kei Saito","doi":"10.1002/macp.202400215","DOIUrl":"https://doi.org/10.1002/macp.202400215","url":null,"abstract":"Novel aryl‐ether‐free polyaromatics with different‐sized cationic headgroups tethered to the backbone are synthesized via superacid‐catalyzed polycondensations and subsequent Menshutkin quaternization reactions for potential application as anion exchange membranes (AEMs) in electrolysis. Experimentally, the effect of four different heterocycloaliphatic quaternary ammonium cationic headgroups on the AEM properties, such as the hydroxide conductivity, water uptake, swelling ratios and alkaline stability, is fully explored. Thin films are prepared by spin‐coating these AEMs onto porous polytetrafluoroethylene substrates. With a high degree of quaternization, these new aryl‐ether free polyaromatic thin film AEMs achieved high conductivities and good mechanical stability. The highest hydroxide conductivity of 45 mS cm−1 is achieved with excellent alkaline stability and conductivity retention of 96% after 30 days in 1 m KOH at 80 °C. Due to the polytetrafluoroethylene substrates, the swelling ratios and water uptake are relatively small, which ensured the astute dimensional stability of these thin film AEMs. The combined effect of alkaline‐stable cationic headgroups, an aromatic backbone and a robust substrate led to a promising thin‐film AEM.","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"40 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142223493","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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Front Cover: Macromol. Chem. Phys. 16/2024 封面：Macromol.Chem.16/2024

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2024-08-20 DOI: 10.1002/macp.202470032

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Masthead: Macromol. Chem. Phys. 16/2024 刊头：Macromol.Chem.16/2024

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2024-08-20 DOI: 10.1002/macp.202470033

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Dynamic Mechanical Spectroscopy with Cylindrical Geometry: Application to the Comparison of Various Plasticizers of Thermoplastic Starch 圆柱几何动态机械光谱：应用于热塑性淀粉各种增塑剂的比较

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2024-08-20 DOI: 10.1002/macp.202400189

Jonathan Basson, Christian Carrot, Yvan Chalamet, Nathalie Mignard

{"title":"Dynamic Mechanical Spectroscopy with Cylindrical Geometry: Application to the Comparison of Various Plasticizers of Thermoplastic Starch","authors":"Jonathan Basson, Christian Carrot, Yvan Chalamet, Nathalie Mignard","doi":"10.1002/macp.202400189","DOIUrl":"https://doi.org/10.1002/macp.202400189","url":null,"abstract":"Dynamic mechanical spectroscopy is a common analysis for polymers. Rectangular specimens are usually used for measurement in the solid state due to their easy designing. However, in reason of the non-symmetric shape of sample, rectangular specimens do not experience linear stress on their all body, leading to overestimation of shear modulus. Corrections are required to determine the right shear modulus. In this present work, straight shear modulus determination is carried out using specimens with a cylindrical shape. The reliability of the technique is described on a biosourced polymer materials made of thermoplastic starch, plasticized by glycerol, choline chloride/urea mixture (ChCl/U), 1-ethyl-3-methylimidazolium chloride ([EMIM]Cl) and 1-ethyl-3-imidazolium acetate ([EMIM]Ac). The technique is shown to be particularly interesting to avoid any additional shaping of the specimens prior to measurements, that can be detrimental to their properties (evaporation, degradation). A comparison between cylinder and rectangular specimen has also been made to illustrate the interest of cylinder clamping on biosourced polymer material.","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"225 21","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142666098","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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Proximal Photocleavage: Controlling Polymer Solubility through Pathway Dependent Wavelength-Orthogonal Photoreactions 近端光解：通过路径依赖性波长-不对称光反应控制聚合物溶解度

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2024-08-20 DOI: 10.1002/macp.202400216

Nigel D. Kidder-Wolff, Samuel W. Thomas III

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