Macromolecular Chemistry and Physics最新文献_第3页

Multi-Stimulus Responsive Nonconventional Fluorescent Supramolecular Polymeric Material

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-02-20 DOI: 10.1002/macp.202400484

Wentao Hao, Chenchen Ke, Xianxiang Pan, Tengfei Qi, Wenping Wang, Wenjuan Li, Wen Yang

{"title":"Multi-Stimulus Responsive Nonconventional Fluorescent Supramolecular Polymeric Material","authors":"Wentao Hao, Chenchen Ke, Xianxiang Pan, Tengfei Qi, Wenping Wang, Wenjuan Li, Wen Yang","doi":"10.1002/macp.202400484","DOIUrl":"https://doi.org/10.1002/macp.202400484","url":null,"abstract":"Fluorescent supramolecular materials have attracted a lot of attention over the past few decades. However, those can respond to multiple stimuli are not often reported, especially for the nonconventional fluorescent materials. Here, a supramolecular material is reported that can respond to temperature/electrical heating, humidity, volatile acids/organic amines, and mechanical strain. This material is prepared by physical mixing oligomeric polyethyleneimine (o-PEI) and oligomeric polyacrylic acid (o-PAA). Although they are almost non-fluorescent, their combination produces bright fluorescence, and the emission bands shift to longer wavelengths as the amount of o-PAA increases. Calculations based on Density Functional Theory (DFT) show that there are strong noncovalent interactions between o-PEI and o-PAA, resulting in through-space conjugation and cluster-triggered emission. By studying the relationship between emission intensity, temperature, and molecular motion, the dependence of emission intensity on relaxation time is established, which will provide insight into the luminescence origin of nonconventional fluorescent materials. In addition, this material shows good self-healing ability. The luminescence, responsiveness and self-reparability are all related to the strong but reversible noncovalent bonds that link the o-PEI and o-PAA. This work not only highlights the value of supramolecular polymers, but also enriches the research of nonconventional fluorescent materials.","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":"143840899","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 Highly Self-Healable Elastomer Based on Heterocyclic and Cage-Shaped Additives with Enhanced Mechanical Properties

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-02-12 DOI: 10.1002/macp.202400399

Pyong Hwa Hong, Young Kyung Kim, Gyeongmin Moon, Min Seon Kim, Gyeong Rim Han, Go Eun Cho, Jong Hyuk Park, Sung Woo Hong

引用次数: 0

Zwitterionic Polycatechols for Covalent Conjugation With Bortezomib and pH-Triggered Release

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-02-12 DOI: 10.1002/macp.202400469

Naikuan Fu, Ao Li, Jing Zhang, Peng Zhang, Hong Zhang, Shicheng Yang, Jianhua Zhang

{"title":"Zwitterionic Polycatechols for Covalent Conjugation With Bortezomib and pH-Triggered Release","authors":"Naikuan Fu, Ao Li, Jing Zhang, Peng Zhang, Hong Zhang, Shicheng Yang, Jianhua Zhang","doi":"10.1002/macp.202400469","DOIUrl":"https://doi.org/10.1002/macp.202400469","url":null,"abstract":"The therapeutic efficacy of Bortezomib (BTZ) is severely limited by its low solubility, poor stability in vivo and nonspecific toxicity. PEGylated nanocarriers can improve drug delivery efficiency, but their applications often suffer from low drug loading, premature leakage and accelerated blood clearance phenomenon. Herein a kind of catechol-functionalized and sulfobetaine-based zwitterionic block copolymer (PGMAD-PSBMA) is prepared by RAFT copolymerization and an epoxy-amino click reaction. And then PGMAD-PSBMA is readily used to conjugate with BTZ by the formation of dynamic boronate bonds to obtain zwitterionic BTZ prodrug (PGMAD@BTZ-PSBMA) and PGMAD@BTZ-PSBMA micelles. The structure and morphology, physicochemical characteristics, drug loading, pH-triggered drug release as well as in vitro cytotoxicity of PGMAD@BTZ-PSBMA micelles are investigated in detail. The results demonstrate that PGMAD@BTZ-PSBMA micelles can not only possess high drug loading (12.9%) and stable dispersion in physiological pH condition (pH 7.4), but also respond to the tumor acid microenvironment and achieve pH-responsive BTZ release. The nanocarriers designed here readily combine the desirable functions of polycatechols for stable conjugation and acid-triggered release and polysulfobetaines for long circulation in blood, which have great potential to enhance therapeutic efficacy and reduce toxic side effects of BTZ and other boronic acid-containing drugs, such as Ixazomib and Steboronine.","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"226 8","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840830","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

Enhancing the Performance of Dielectric Elastomer Actuators Through Chemical Modifications

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-02-11 DOI: 10.1002/macp.202400447

Zhengheng Zhang, An Wang, Tianyi Chen, Tengjiao Wang, Peng Li

{"title":"Enhancing the Performance of Dielectric Elastomer Actuators Through Chemical Modifications","authors":"Zhengheng Zhang, An Wang, Tianyi Chen, Tengjiao Wang, Peng Li","doi":"10.1002/macp.202400447","DOIUrl":"https://doi.org/10.1002/macp.202400447","url":null,"abstract":"Current research on enhancing the performance of dielectric elastomer actuators (DEAs) primarily focuses on improving the properties of dielectric elastomers (DEs), including increasing the dielectric constant, reducing the elastic modulus, and minimizing dielectric losses. The commonly used composite filler method struggles to address the trade-off between high dielectric constant and low elastic modulus in DEs. In contrast, modifying the chemical structure by introducing polar groups into the DE polymer backbone can effectively increase the dielectric constant of DEs. Meanwhile, optimizing the degree of crosslinking and molecular weight can effectively reduce the elastic modulus of DEs. Currently, there remains a lack of systematic summarization regarding the chemical modification methods of DEs. This paper summarizes the actuation principles of DEs and introduces simple electromechanical modeling methods. It focuses on methods to enhance the dielectric constant of DEs through hydrosilylation, thiol-ene click reactions, and azide-alkyne click reactions, as well as methods to reduce the elastic modulus of DEs by improving the degree of crosslinking and molecular weight. Additionally, this study explores the current applications of DEAs in the fields of artificial muscles and soft robotics.","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"226 8","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840860","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

Effect of Li Halides on the Mechanical Properties and Thermoplasticity of Poly(vinyl alcohol) Molded by Hot Pressing

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-02-09 DOI: 10.1002/macp.202400382

Yusuke Taoka, Koyuru Suzuki, Masayuki Yamaguchi, Kazuaki Matsumura

{"title":"Effect of Li Halides on the Mechanical Properties and Thermoplasticity of Poly(vinyl alcohol) Molded by Hot Pressing","authors":"Yusuke Taoka, Koyuru Suzuki, Masayuki Yamaguchi, Kazuaki Matsumura","doi":"10.1002/macp.202400382","DOIUrl":"https://doi.org/10.1002/macp.202400382","url":null,"abstract":"The effect of lithium halide salts on the characteristics of poly(vinyl alcohol) (PVA) gels fabricated using the hot-press (HP) technique is investigated. The incorporation of lithium salts, such as lithium chloride (LiCl), lithium bromide (LiBr), and lithium iodide (LiI), degrades the mechanical properties of the PVA gel and decreases its crystallinity, melting point, and glass transition temperature (Tg). Additionally, the melting point of PVA is lowered, resulting in the melting of PVA below its decomposition temperature, leading to thermoplasticity. Following thermoforming, the mechanical properties of the PVA gel are minimally altered compared with those before thermoforming, potentially enhancing the processability of PVA and diversifying the range of achievable shapes. Notably, the majority of the introduced lithium salts can be eliminated by washing. Notably, the most pronounced change in the PVA gel properties is obtained with LiCl addition than with LiBr or LiI addition, suggesting that LiCl imparts superior processing characteristics to PVA gels.","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"226 8","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840554","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

Flame Retardancy Enhancement of Styrene–Butadiene Rubber Using Sepiolite Ionogels

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-02-09 DOI: 10.1002/macp.202400486

Qin Qi, Kai Fang, Kai Cheng, Qingting Liu, Xudong Fu, Rong Zhang, Shengfei Hu, Jun Yang

{"title":"Flame Retardancy Enhancement of Styrene–Butadiene Rubber Using Sepiolite Ionogels","authors":"Qin Qi, Kai Fang, Kai Cheng, Qingting Liu, Xudong Fu, Rong Zhang, Shengfei Hu, Jun Yang","doi":"10.1002/macp.202400486","DOIUrl":"https://doi.org/10.1002/macp.202400486","url":null,"abstract":"When using traditional flame retardants, rubber faces the trade-off between improving the flame retardancy and maintaining mechanical properties. Herein, a novel flame retardant of sepiolite-based ionogels (IL@ASep) with both flame retardancy and reinforcement functions is developed. This work explores the flame retardancy and mechanical properties of composites made from compound rubber filled with sepiolite (Sep) using different modification methods. The results indicate that the addition of IL@ASep helps to simultaneously improve the flame retardancy and mechanical properties of compound. The materials with IL@ASep have a limiting oxygen index of 30.7% and a modulus at 100% of 4.95 MPa, whereas the samples without fillers have a limiting oxygen index of 23.5% and a modulus at 100% of 3.77 MPa. compared to the original samples, the total heat release and peak heat release decreased by 55.3% and 39.2%, respectively. Furthermore, the method of adding ionic liquid (IL) is also expected to improve the flame retardancy and mechanical properties of other polymers.","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"226 8","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840547","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

Self-Healing Waterborne Polyurethane Elastomers Based on Multiple Reversible Bonds with Good Mechanical Performance for Composite Conductors

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-02-07 DOI: 10.1002/macp.202400435

Jiajia Wu, Mengqing Ren, Ming Chen, Xuanyu Liu, Tao Jin, Lili Wu

{"title":"Self-Healing Waterborne Polyurethane Elastomers Based on Multiple Reversible Bonds with Good Mechanical Performance for Composite Conductors","authors":"Jiajia Wu, Mengqing Ren, Ming Chen, Xuanyu Liu, Tao Jin, Lili Wu","doi":"10.1002/macp.202400435","DOIUrl":"https://doi.org/10.1002/macp.202400435","url":null,"abstract":"As a functional material, polyurethane elastomers have a wide range of applications in fields such as flexible wearable devices and healthcare but are prone to damage during use. As a result, they are often incorporated with self-healing properties to prolong their service life. The preparation of polyurethane elastomers with excellent mechanical and self-healing properties has become crucial to addressing this issue. In this study, a new self-healing system with excellent mechanical properties is developed by reacting butanedione oxime (DMG) and gallic acid (GA) with isocyanate (─NCO) to introduce oxime-carbamate bonds and phenol-carbamate bonds into waterborne polyurethane. The triple dynamic reversible synergistic network formed through multiple reversible covalent bonds and hydrogen bonds enhances the mechanical and self-healing properties of the waterborne polyurethane elastomers. The results demonstrate that the synthesized polyurethane elastomer films exhibit excellent mechanical properties (strength of 41.02 MPa, elongation at break of 955.9%, toughness of 112.17 MJ m−3) and self-healing properties (healing efficiency of 91.21%). In addition, the composite conductor (DG-WPU-CNTs) prepared by incorporating this polyurethane elastomer with carbon nanotubes (CNTs) exhibits excellent sensitivity, stability, and self-healing properties, providing a basis for its application in flexible wearable devices.","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"226 8","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840683","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

Water-Soluble Polymeric Probe with Naphthalimide Pendants for Fluorimetric Formaldehyde Sensing

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-02-06 DOI: 10.1002/macp.202400434

Swagata Pan, Subhadip Roy, Priyadarsi De

{"title":"Water-Soluble Polymeric Probe with Naphthalimide Pendants for Fluorimetric Formaldehyde Sensing","authors":"Swagata Pan, Subhadip Roy, Priyadarsi De","doi":"10.1002/macp.202400434","DOIUrl":"https://doi.org/10.1002/macp.202400434","url":null,"abstract":"Formaldehyde (FA) is a common raw material extensively used in various industrial applications. However, FA is a known carcinogen and poses significant risks to human health. Therefore, developing a sensitive and selective probe for detecting FA is crucial. Herein, a naphthalimide-based water-soluble fluorescent polymeric probe for selective detection of FA in an aqueous medium at physiological pH is presented. The aromatic hydrazine units present in the side chains of the polymer react with FA through an addition-elimination reaction with the formation of hydrazone derivative, which halts the photoelectron transfer (PET) mechanism within the polymer, leading to a “turn-on” in green fluorescence. The formation of hydrazone is confirmed by electrospray ionization mass spectrometry (ESI-MS) analysis for a model reaction of (6-hydrazinyl-2-(2-hydroxyethyl)-1H-benzo[de]isoquinoline-1,3(2H)-dione, SM) with FA. The sensing mechanism through a PET on–off is supported by density functional theory (DFT) calculation. The probe demonstrates remarkable sensitivity, detecting FA concentrations as low as 1.7 µm, and shows a five-fold fluorescence intensity increase within 10 min when exposed to 10 µm formaldehyde. Additionally, the probe offers selective detection of FA over other analytes via fluorometric methods. This study represents a significant advancement in developing sensitive and selective polymeric probes.","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"226 6","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688760","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

Synthesis and Application of Polyvinyl Butyral Resins: A Review

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-02-06 DOI: 10.1002/macp.202400478

Yifan Zhang, Yinqi Fan, Yang Yang, Zhizhong Chen, Jiangyi Chen, Keliang Zhao, Chongyi Chen, Zhenguo Liu

引用次数: 0

Efficient PET Depolymerization Using Cost-Effective Alkali and Alkaline Earth Metal-Based Salts for High Monomer Yield

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-02-06 DOI: 10.1002/macp.202400316

Samir Barman, Rajesh Theravalappil, Niladri Maity, Jaseer EA, Nestor Garcia, Abdulrahman Musa

{"title":"Efficient PET Depolymerization Using Cost-Effective Alkali and Alkaline Earth Metal-Based Salts for High Monomer Yield","authors":"Samir Barman, Rajesh Theravalappil, Niladri Maity, Jaseer EA, Nestor Garcia, Abdulrahman Musa","doi":"10.1002/macp.202400316","DOIUrl":"https://doi.org/10.1002/macp.202400316","url":null,"abstract":"Catalytic glycolysis of polyethylene terephthalate (PET) into its monomer, bis(2-hydroxyethyl) terephthalate (BHET), is a major focus of chemical research in recent decades. Metal catalysts, especially heavy metal salts, are recognized for their efficiency in degrading this widely used thermoplastic. However, concerns over the non-biodegradable and toxic nature of heavy metal catalysts like Zn and Pb salts, along with their limited selectivity, have led researchers to seek alternative, more environmentally friendly, and cost-effective catalysts. This study explores alternatives such as lithium, sodium, and calcium acetate/formates, demonstrating that selected benign metal salts not only accelerate PET degradation but can also surpass traditional heavy metal acetate catalysts (e.g., Zn acetate) in terms of activity and BHET yield. More importantly, complete PET conversion is achieved within 3 h at ≈188 °C, with excellent BHET yield. The catalytic reactions using lithium and calcium acetate show a superior initial reaction rate under optimized conditions.","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"226 6","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688759","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