Chemically Recyclable Supramolecular Thermosets toward Strong and Reusable Hot-Melt Adhesives

Macromolecules, Journal Year: 2023, Volume and Issue: 56(17), P. 6633 - 6643

Published: Aug. 25, 2023

Chemically recyclable thermosets are an ideal substitute for traditional in the development of a circular economy and sustainable environment. However, efficient easy-to-achieve chemical recycling strategies remains challenging. Herein, series supramolecular that can be chemically recycled under mild acid conditions at room temperature fabricated by cross-linking polyimine polymers with dynamic boroxines (PIx-Boroxine). By tailoring molar content boroxines, PI1.2-boroxine exhibit tensile strength ∼30.6 MPa, yield 33.0 elongation break ∼111.6%, Young's modulus ∼679.6 MPa. Because nature imine bonds, PIx-boroxine thermoset exhibits fast stress relaxation behavior, which enables them to have good reprocessing ability. These unique features also guarantee high-performance reusable hot-melt adhesive. The maximum lap shear PIx-Boroxine-based adhesives stainless steel bonding adhesive reach ∼18.6 is comparable commercial adhesives. Meanwhile, reused least 10 times only small amount reduction strength. More importantly, easily depolymerized 0.1 M HCl/H2O solution temperature. Further, monomers efficiently separated simple separation procedure. recovered fabricate new without losing their mechanical properties. This work provides design strategy develop recyclability, will contribute modern society.

Language: Английский

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Boron‐Nitrogen Lewis Pairs in the Assembly of Supramolecular Macrocycles, Molecular Cages, Polymers, and 3D Materials

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 63(3)

Published: Oct. 10, 2023

Covering an exceptionally wide range of bond strengths, the dynamic nature and facile tunability dative B-N bonds is highly attractive when it comes to assembly supramolecular polymers materials. This Minireview offers overview advances in development functional materials where Lewis pairs (LPs) play a key role their critically influence properties. Specifically, we describe reversible linear with interesting optical, electronic catalytic properties, discrete macrocycles molecular cages that take up diverse guest molecules undergo structural changes triggered by external stimuli, covalent organic frameworks (COFs) intriguing interlocked structures can embed separate gases such as CO

Language: Английский

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Dynamic Polymeric Materials via Hydrogen-bond Cross-linking: Effect of Multiple Network Topologies

Progress in Polymer Science, Journal Year: 2024, Volume and Issue: unknown, P. 101890 - 101890

Published: Sept. 1, 2024

Language: Английский

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Constructing Covalent Organic Polymers through Dative B─N Bonds: Synthesis, Single Crystal Structures, and Physical Properties

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: March 10, 2024

Abstract Growing single crystals of covalent organic polymers (COPs) for single‐crystal X‐ray diffraction analysis is very important and highly desirable because such strategy provides a deep understanding crystallization kinetics the structure‐property relationship COPs. Based on that dynamic bonds can allow self‐correction structures during crystal growth, two COPs ( CityU‐15 CityU‐16 ) based dative boron‐nitrogen (B─N) have been successfully obtained. Detailly, tetra(4‐pyridyl)tetrathiafulvalene (TTF(py) 4 tetra(4‐pyridyl)porphine (TPYP) are employed as N‐donor ligands to react with 1,4‐bis(benzodioxaborole) benzene prepare COPs, named , respectively. exhibits enhanced stability compared size reach up 0.7 cm. shows good recyclability reveals noticeable photosensitivity upon iodine doping. After treatment iodine, both display obvious color changes. Specially, device I 2 ‐treated excellent low‐voltage operation low energy consumption 3.3 fJ, facilitating development artificial vision. This work highlights successful introduction functional groups into B‐N‐containing opening new avenues expanding their applications.

Language: Английский

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Crystalline Porous Organic Frameworks Based on Multiple Dynamic Linkages

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(28)

Published: April 24, 2024

Abstract A novel class of crystalline porous materials has been developed utilizing multilevel dynamic linkages, including covalent B−O, dative B←N and hydrogen bonds. Typically, boronic acids undergo in situ condensation to afford B 3 O ‐based units, which further extend molecular complexes or chains via The obtained superstructures are subsequently interconnected bonds π–π interactions, producing organic frameworks (CPOFs). CPOFs display excellent solution processability, allowing dissolution subsequent crystallization their original structures, independent recrystallization conditions, possibly due the diverse bond energies involved interactions. Significantly, can be synthesized on a gram‐scale using cost‐effective monomers. In addition, numerous acidic sites endow with high NH capacity, surpassing most commercial materials.

Language: Английский

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A voltammetric sensor based on praseodymium oxide nanoparticles immobilized on tetrahedral boronate esters for favipiravir used in the treatment of COVID-19

Journal of the Taiwan Institute of Chemical Engineers, Journal Year: 2025, Volume and Issue: 169, P. 105975 - 105975

Published: Jan. 25, 2025

Language: Английский

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Synthesis of cyclic carbonates from CO2 and epoxides by novel metal and halide-free chiral boron compounds

Tetrahedron, Journal Year: 2025, Volume and Issue: unknown, P. 134485 - 134485

Published: Jan. 1, 2025

Language: Английский

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Synthesis of Cross-Linked Polyolefin Elastomers with High Performance Yet Good Reprocessability

Industrial & Engineering Chemistry Research, Journal Year: 2025, Volume and Issue: 64(9), P. 5080 - 5086

Published: Feb. 24, 2025

The development of polymer materials with high performance and good reusability is critical to sustainability the industry. However, balance these two aspects in elastomers rubbers highly challenging. Here, we report synthesis a novel polyolefin elastomer (POE) dynamically cross-linked by an imine-linked boronic ester. It improves tensile strength at break (σ) POE 148.2%, Young's modulus (E) 92.6%, toughness (UT) 49.4%, slightly decreased elongation break. also has higher thermal resistance than pristine one presents steady storage plateau 2.8 MPa above 150 °C. Moreover, it can be reprocessed impressive recovery ratio UT 89.7% because dynamic exchanges ester imine. Dynamic mechanical analysis shows that cross-linking short characteristic relaxation time 9.6 min low apparent activation energy 65.1 kJ·mol–1. Our study on POEs provides new way for sustainable elastomers.

Language: Английский

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Self-assembled chitosan‑boronic acid hydrogel as dynamic crosslinker to produce 3D-printable glucose-sensitive hydrogel

Carbohydrate Polymers, Journal Year: 2025, Volume and Issue: unknown, P. 123737 - 123737

Published: May 1, 2025

Language: Английский

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Water-assisted self-healing of polymeric materials

European Polymer Journal, Journal Year: 2024, Volume and Issue: 217, P. 113310 - 113310

Published: July 25, 2024

Language: Английский

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