Science China Chemistry, Journal Year: 2025, Volume and Issue: unknown
Published: March 10, 2025
Language: Английский
Advanced Science, Journal Year: 2024, Volume and Issue: unknown
Published: Oct. 16, 2024
Abstract Mechanically robust and tough polymeric materials are in high demand for applications ranging from flexible electronics to aerospace. However, achieving both toughness strength polymers remains a significant challenge due their inherently contradictory nature. Here, universal strategy enhancing the of polymer blends using ligand‐modulated metal–organic framework (MOF) nanoparticles is presented, which engineered have adjustable hydrophilicity lipophilicity by varying types ratios ligands. Molecular dynamics (MD) simulations demonstrate that these can effectively regulate interfaces between chemically distinct based on amphiphilicity. Remarkably, mere 0.1 wt.% MOF with optimized amphiphilicity (ML‐MOF (5:5) ) delivered ≈1.1‐ ≈34.1‐fold increase poly (lactic acid) (PLA)/poly (butylene succinate) (PBS) blend, respectively. Moreover, amphiphilicity‐tailorable universally enhance mechanical properties various blends, such as polypropylene (PP)/polyethylene (PE), PP/polystyrene (PS), PLA/poly adipate‐co‐terephthalate) (PBAT), PLA/polycaprolactone (PCL)/PBS. This simple method offers potential strengthening toughening blends.
Language: Английский
Citations
26
Nature Reviews Chemistry, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 31, 2025
Language: Английский
Citations
3
Macromolecules, Journal Year: 2025, Volume and Issue: 58(4), P. 1923 - 1934
Published: Feb. 5, 2025
Developing closed-loop recyclable thermosets and understanding their structure–property relationships are essential steps in advancing a circular materials economy. Here, we present vinylogous urethane (VU) thermoset with recyclability, synthesized through the reaction of polytetrahydrofuran bisacetoacetate (aPTHF) tris(2-aminoethyl)amine (TREN). These VU polymers exhibit high elasticity, only 3–9% residual strain observed after cyclic tensile testing at maximum 100%, depending on molecular weight aPTHF network cross-link density. The two structural parameters also allow modulation mechanical stress-relaxation properties elastomers. To investigate hydrolysis linkages within hydrophobic matrix, employed heterogeneous system using biphasic mixture HCl CDCl3. Our findings show that VUs remain stable pure water but can be dissociated under acidic conditions, dissociation rate accelerated higher temperatures and/or presence concentrations. detailed investigations indicate potential elastomers as sustainable substrates for wearable sensors. We therefore conduct case study synthesizing sensor incorporation multiwalled carbon nanotubes (MCNs) into elastomer matrix. robustly detect various movements. Moreover, treatment both neat polymer composite diethyl ether solvent allows excellent recovery (>90%) TREN (86%), without discernible damage to MCNs reclaimed from latter.
Language: Английский
Citations
2
Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 497, P. 154710 - 154710
Published: Aug. 13, 2024
Language: Английский
Citations
9
Advanced Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 22, 2025
Abstract Dynamic covalent polymer networks (DCPN) provide an important solution to the challenging recyclability of thermoset elastomers. However, dynamic bonds exhibit relatively weak bond energies, considerably decreasing mechanical properties DCPN. Herein, a novel reinforcement strategy for DCPN involving in situ formation supramolecular organic nanofillers through asynchronous polymerization is proposed. Owing difference reactivity isocyanate groups and gradual deblocking aldimine, cross‐linking hexamethylene diisocyanate isocyanate‐terminated prepolymer containing oxime–urethane with deblocked tris(2‐aminoethyl)amine facilitates transition from molecular interpenetration chains into immiscible polymerization. This results thermodynamic incompatibility between hyperbranched clusters long chains, inducing spontaneous nanofillers. Compared traditional strategies, improve Furthermore, interactions enable network excellent recyclability. The unique prepared allow their combination carbon fibers (CF) form CF composites outstanding personal‐protection applications, achieving composite upcycling. study offers on upcycling high‐performance composites.
Language: Английский
Citations
1
Chem, Journal Year: 2025, Volume and Issue: unknown, P. 102398 - 102398
Published: Feb. 1, 2025
Language: Английский
Citations
1
Polymers, Journal Year: 2025, Volume and Issue: 17(4), P. 542 - 542
Published: Feb. 19, 2025
Flexible sensors are revolutionizing wearable and implantable devices, with conductive hydrogels emerging as key materials due to their biomimetic structure, biocompatibility, tunable transparency, stimuli-responsive electrical properties. However, fragility limited durability pose significant challenges for broader applications. Drawing inspiration from the self-healing capabilities of natural organisms like mussels, researchers embedding self-repair mechanisms into improve reliability lifespan. This review highlights recent advances in (SH) hydrogels, focusing on synthesis methods, healing mechanisms, strategies enhance multifunctionality. It also explores wide-ranging applications, including vivo signal monitoring, biochemical sensors, supercapacitors, flexible displays, triboelectric nanogenerators, bioelectronics. While progress has been made, remain balancing efficiency, mechanical strength, sensing performance. offers insights overcoming these obstacles discusses future research directions advancing SH hydrogel-based bioelectronics, aiming pave way durable, high-performance devices next-generation technologies.
Language: Английский
Citations
1
Advanced Materials, Journal Year: 2025, Volume and Issue: unknown
Published: March 13, 2025
Abstract Flexible bioelectronic interfaces with adhesive properties are essential for advancing modern medicine and human‐machine interactions. However, achieving both stable adhesion non‐damaging detachment remains a significant challenge. In this study, lithium bond‐mediated molecular cascade hydrogel (LMCH) is designed, which facilitates robust at the tissue level permits atraumatic repositioning as required. By integrating of structure elastic characteristics interface, LMCH interface not only achieved high strength (197 J m −2 ) on skin, but also significantly extended cracking cycles surface during peeling process from 4 to 380, marking an enhancement nearly two orders magnitude. Furthermore, Young's modulus similar that human (25 kPa), exceptional stretchability (1080%), ionic conductivity (7.14 S −1 ), demonstrates outstanding compatibility, biocompatibility, detection capabilities electrocardiogram (ECG) electromyogram (EMG) signals. This study presents new insights potential bioelectronics implantable technologies.
Language: Английский
Citations
1
Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown
Published: April 14, 2025
Abstract Room‐temperature liquid metals (RTLMs) exhibit inherent fluidity, metallic conductivity, remarkable stability, and recyclability, which indicate significant potential for applications in improving the efficiency of electronics recycling reducing costs. However, low viscosity RTLMs their poor interfacial adhesion to substrates typically necessitate utilization intricate fabrication processes. Here, a viscosity‐tunable, photothermal repairable, full‐component recyclable eutectic gallium–indium/epoxy‐modified lignin/polyethylene glycol diacid/ethylene vitrimer (EGaIn‐LPEv) is presented printed circuits. The system displays good stability tunable at room temperature because ultra‐high reactive site content modified lignin dual dynamic bonding by introduction ethylene glycol. EGaIn‐LPEv‐based circuit exhibits high resolution full component recovery up 7.6 µm 98.3 wt.%, respectively. As principal component, not only enhances system's green credentials but also endows it with an efficient repairable capability. reconnection damaged can be achieved 15 s through 808 nm infrared activation. This study opens new avenue development manufacturing processes sustainable application advanced, high‐resolution, fully recycled electronic devices.
Language: Английский
Citations
1
Small, Journal Year: 2024, Volume and Issue: unknown
Published: Oct. 11, 2024
Abstract Reversible and recyclable thermosets have garnered increasing attention for their smart functionality sustainability. However, they still face challenges in balancing comprehensive performance dynamic features. Herein, silicon (Si)─oxygen (O) imidazole units covalent bonds are coupled to generate a new class of bio‐polyimines (Bio‐Si‐PABZs), endow them with high excellent reprocessing capability acid‐degradability. By tailoring the molar content diamines, this Bio‐Si‐PABZs displayed both markedly glass transition temperature (162 °C) char yield at 800 °C an oxygen atmosphere (73.1%). These favorable properties outperformed various previously reported polyimines competed effectively commercial fossil‐based polycarbonate. Moreover, scratch (≈10 µ m) on surface samples can be self‐healing within only 2 min, effective “ Bird Nest ”‐to‐“ Torch ” recycling also achieved through free amines solution. Most importantly, bio‐based siloxane adhesive derived from intermediate Bio‐Si‐PABZ‐1 by acidic degradation demonstrated broad robust adhesion substrates, values reaching up ≈3.5 MPa. For first time, study lays scientific groundwork designing polyimine Si─O units, as well converting plastic wastes into thermal‐reversibility renewable adhesives.
Language: Английский
Citations
6