New Advances in Covalent Network Polymers via Dynamic Covalent Chemistry

Chemical Reviews, Год журнала: 2024, Номер 124(12), С. 7829 - 7906

Опубликована: Июнь 3, 2024

Covalent network polymers, as materials composed of atoms interconnected by covalent bonds in a continuous network, are known for their thermal and chemical stability. Over the past two decades, these have undergone significant transformations, gaining properties such malleability, environmental responsiveness, recyclability, crystallinity, customizable porosity, enabled development integration dynamic chemistry (DCvC). In this review, we explore innovative realm polymers focusing on recent advances achieved through application DCvC. We start examining history fundamental principles DCvC, detailing its inception core concepts noting key role reversible bond formation. Then reprocessability DCvC is thoroughly discussed, starting from milestones that marked evolution progressing to current trends applications. The influence crystallinity then reviewed, covering diversity, synthesis techniques, functionalities. concluding section, address challenges faced field speculates potential future directions.

Язык: Английский

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High-Performance Recyclable and Malleable Epoxy Resin with Vanillin-Based Hyperbranched Epoxy Resin Containing Dual Dynamic Bonds

ACS Sustainable Chemistry & Engineering, Год журнала: 2023, Номер 11(30), С. 11077 - 11087

Опубликована: Июль 18, 2023

Dynamic covalent polymer networks represent new opportunities in the design of sustainable epoxy resins due to their excellent malleability and reprocessability; however, adaptable network is usually accompanied by low glass transition temperature, poor creep resistance, mechanical brittleness. Herein, we demonstrate a vanillin-based hyperbranched resin (VEHBP) containing disulfide imine dynamic bonds for recyclable malleable with high temperature (Tg), significantly improved properties. The 5%VEHBP exhibited 175 °C 130 34.1, 19.7, 173.3% increase tensile strength, storage modulus, toughness respectively, compared neat resin. Meanwhile, topological structure VEHBP complemented dual endowed these materials self-healing ability, reprocessability, degradability, which represents an important step toward fabrication high-performance networks.

Язык: Английский

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Recyclable, Degradable, and Fully Bio-Based Covalent Adaptable Polymer Networks Enabled by a Dynamic Diacetal Motif

ACS Sustainable Chemistry & Engineering, Год журнала: 2023, Номер 11(7), С. 3065 - 3073

Опубликована: Фев. 8, 2023

Covalent adaptable networks (CANs), which can reconfigure on-demand under photo- or thermal stimuli, have recently been pursued as an alternative to the traditional thermosetting polymers. While these materials demonstrated excellent recyclability and reprocessability, majority of them reported date are based on non-renewable resources. Meanwhile, material recycling highly counts collection system, any that inevitably escape from system will eventually go environment, challenging nature's ability break down materials. Therefore, CAN possess both degradability desirable. In this work, we seek simultaneously address recyclability, renewability, Spiro diacetal building blocks derived bio-based benzaldehyde erythritol then subjected curing process using epoxy soybean oil crosslinkers, yielding fully biobased Owing dynamic degradable features acetal motifs, our exhibit good acid degradability, degraded products reusable for preparation new CANs. addition, by tuning steric hindrance adjacent reactive phenol site, able control mechanical properties CANs different benzaldehydes (vanillin, ethyl vanillin, syringaldehyde). The outcome current research provides a strategy design recyclable CANs, extend development

Язык: Английский

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Reconstruction of Cellulose Intermolecular Interactions from Hydrogen Bonds to Dynamic Covalent Networks Enables a Thermo-processable Cellulosic Plastic with Tunable Strength and Toughness

ACS Nano, Год журнала: 2023, Номер 17(21), С. 21420 - 21431

Опубликована: Ноя. 3, 2023

Its excellent renewability and biodegradability make cellulose an attractive resource to prepare fossil-based plastic alternatives. However, itself exhibits strong intermolecular hydrogen bond (H-bond) interactions, significantly restricting the mobility of chains, thus leading poor thermo-processing performance. Here, we reconstructed interactions chains via replacing original H-bonds with dynamic covalent bonds. By this, can be easily thermo-processed into a cellulosic under mild conditions (70 °C). Through adjusting chemical structure networks, shows tunable mechanical strength (3.0–33.5 MPa) toughness (43–321 kJ m–2). The also resistance water, organic solvent, acid solution, alkali high temperature (>400 Moreover, it owns good biological degradability recyclability. This work provides effective method develop high-performance plastics for substitution.

Язык: Английский

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Viscoelasticity of Polymers with Dynamic Covalent Bonds: Concepts and Misconceptions

Macromolecules, Год журнала: 2023, Номер 56(21), С. 8688 - 8696

Опубликована: Ноя. 3, 2023

Polymers with dynamic covalent bonds are an exciting class of materials properties and potential applications that rapidly gain significant attention from diverse scientific communities. While the number publications on this emerging topic increases exponentially, navigating through literature reveals a series physical inconsistencies in previously established concepts some misconceptions data analysis interpretation. The current paper presents practices often applied to characterization systems emphasizes particular may lead critical divergences misinterpretations results. We particularly focus should be avoided interpretation stress–relaxation viscoelastic estimates bond dissociation energy. Instead, we suggest using traditional approaches have been polymer for decades. Lastly, emphasize challenges full understanding microscopic behavior vitrimers.

Язык: Английский

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Nature-inspired adhesive systems

Chemical Society Reviews, Год журнала: 2024, Номер 53(16), С. 8240 - 8305

Опубликована: Янв. 1, 2024

Many organisms in nature thrive intricate habitats through their unique bio-adhesive surfaces, facilitating tasks such as capturing prey and reproduction. It's important to note that the remarkable adhesion properties found these natural biological surfaces primarily arise from distinct micro- nanostructures and/or chemical compositions. To create artificial with superior capabilities, researchers delve deeper into underlying mechanisms of captivating phenomena draw inspiration. This article provides a systematic overview various different mechanisms, focusing on surface chemistry, offering design principles for counterparts. Here, basic interactions models are introduced first. will be followed by an exploration research advancements adhesive including both dry wet/underwater along relevant characterization techniques. Special attention is paid stimulus-responsive smart tunable properties. The goal spotlight recent advancements, identify common themes, explore fundamental distinctions pinpoint present challenges prospects this field.

Язык: Английский

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Practical Applications of Self‐Healing Polymers Beyond Mechanical and Electrical Recovery

Advanced Science, Год журнала: 2024, Номер 11(16)

Опубликована: Фев. 15, 2024

Self-healing polymeric materials, which can repair physical damage, offer promising prospects for protective applications across various industries. Although prolonged durability and resource conservation are key advantages, focusing solely on mechanical recovery may limit the market potential of these materials. The unique properties self-healing polymers, such as interfacial reduction, seamless connection lines, temperature/pressure responses, phase transitions, enable a multitude innovative applications. In this perspective, diverse polymers beyond their traditional strength emphasized in sectors food packaging, damage-reporting, radiation shielding, acoustic conservation, biomedical monitoring, tissue regeneration is explored. With regards to commercialization challenges, including scalability, robustness, performance degradation under extreme conditions, strategies overcome limitations promote successful industrialization discussed. Furthermore, impacts materials future research directions, encompassing environmental sustainability, advanced computational techniques, integration with emerging technologies, tailoring specific examined. This perspective aims inspire interdisciplinary approaches foster adoption real-life settings, ultimately contributing development next-generation

Язык: Английский

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Sustainability of self-healing polymers: A holistic perspective towards circularity in polymer networks

Progress in Polymer Science, Год журнала: 2024, Номер 152, С. 101816 - 101816

Опубликована: Март 26, 2024

Permanent polymer networks present an important sustainability challenge. Irreversible covalent crosslinks impart these materials excellent mechanical properties, thermal and chemical resistance, yet also render them difficult to repair recycle. Self-healing mechanisms can extend the lifetime of thermosets elastomers, improving their durability making lifecycle more sustainable. In addition extension, this paper reviews self-healing polymers from a holistic point view. The entire is critically assessed with reference green chemistry principles sustainable development. relation between chemistries aspects each phases are discussed, starting feedstocks, monomer functionalisation synthesis, processing manufacturing as well end-of-life considerations, i.e. recycling or (bio)degradation. review provides toolbox for development thermosets, elastomers composites. It utmost importance consider materials, derived products – by extension any material product. ability often related recyclability should primarily reduce amount new that necessary fulfill societal needs, extending maximizing reprocessing into products. Increasing healing efficiency number cycles improves overall environmental impact relative extended service lifetime. Renewable resources biomass, processes waste streams be first choice create polymers. Finally, biodegradability considered complementary scenario upon accidental loss environment, provided biodegradation does not start under prospected use conditions products, but postponed until contact stimuli in environment.

Язык: Английский

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Superior Epoxy Vitrimer Containing Acetal and Disulfide Bonds for Achieving High Mechanical Properties, Reprocessability, and Degradability

Macromolecules, Год журнала: 2024, Номер 57(11), С. 5450 - 5460

Опубликована: Май 29, 2024

The development of sustainable composites necessitates biobased epoxy resins that are highly recyclable and degradable; however, the integration mechanical, reprocessing, rapid degradation properties into a single resin remains significant challenge. present study proposes straightforward approach to overcoming problem by combining two labile covalent bonds an resin. combination acetal disulfide demonstrates synergistic effect on performance resin, leading ultrafast polymer. carbon fiber-reinforced composite with matrix shows tensile strength exceeding 630 MPa, but degrades completely within just 8 min, while recovered fibers display nondestructive characteristics similar those original material. Moreover, we designed good self-healing reprocessing ability. Scratches surface can be self-healed heating, powdered reshaped under hot press. These findings offer new preparation composites, highlighting importance thermosetting polymers.

Язык: Английский

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Synergistic cross-linking strategy with oxime-carbamate and hydrogen bonding arrays for excellent damage self-healing and reprocess ability of thermoset polyurethanes

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 160951 - 160951

Опубликована: Фев. 1, 2025

Язык: Английский

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