Multi‐Armed Molecule Drives High Energy Dissipation and Stiffness via Physically Cross‐Linking DOI
Li Han, Wen-Hao Qi, Kai Liu

и другие.

Small, Год журнала: 2025, Номер unknown

Опубликована: Май 12, 2025

Abstract Damping materials, particularly viscoelastic polymeric are essential to mitigate or even eliminate vibration through energy dissipation. However, designing pure damping materials with high stiffness remains a challenge, which limits their application in constrained layer treatments for mechanical structures. Herein, chemical design of yet stiff supramolecular (SPMs) cross‐linked by small dendritic molecules quadruple H‐bonding units at the branch ends is proposed. These rationally designed not only enhance chain relaxation and improve performance original topology, but also maintain resultant level due newly generated robust H‐bonds. As result, these SPMs exhibit excellent across wide range frequencies temperatures, while simultaneously demonstrating key characteristics such as stiffness, adhesive properties, recyclability. Importantly, employed model system elucidate molecular mechanism underlying unique combination stiffness.

Язык: Английский

Supramolecular Organic Nanofiller: A New Reinforcement Strategy for Dynamic Covalent Polymer Networks Toward Upcycling of Carbon Fiber Composites DOI Open Access
Zhipeng Zhang, Qian Lu,

Dandan Hu

и другие.

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 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.

Язык: Английский

Процитировано

2
Damping Supramolecular Elastomer for Steady Hypothermic Sensing DOI
Song Ma,

Haofei Qie,

Xin Yang

и другие.

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 24, 2025

Abstract Flexible temperature sensors often use gels to achieve skin‐inspired softness, but the water evaporation and freezing of hydrogel leakage ionogel, cause unstable signal transmission inaccurate measurement at sub‐zero temperatures. Here steady hypothermic sensing is achieved by designing a supramolecular elastomer containing two types segments: liquid‐free iontronic segment transmit electrical charges prevent ion leakage, neutral with pendant chains damp vibration for stable transmission. The exhibits excellent tensile properties, adhesiveness, self‐healing, ionic conductivity A wireless system fabricated based on supermolecule elastomer, realizing accurate, steady, sensitive real‐time detection. Especially, sensor coefficient resistance (TCR) 8.87% °C −1 from −20 −15 °C, three five times higher than that most flexible sensors. There no significant difference in detected this an infrared thermal imaging camera. Such represents step toward highly accurate cold chain transportation beyond.

Язык: Английский

Процитировано

2
Ultrathin Yet Robust Quasi‐Solid‐State Electrolyte with Ion‐Selective Channel for Superior Alkali‐Metal Batteries DOI Open Access
Dongjiang Chen, Wei Chen, Bowen Zhang

и другие.

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 7, 2025

Abstract Solid‐state alkali‐metal batteries experience dendrite growth require a robust solid‐electrolyte interphase (SEI) and high deformation resistance of electrolytes to stabilize the electrolyte/metal interface. However, traditional dual‐ion polymer electrolyte with large thickness has low ion transference number insufficient mechanical stability, leading concentration gradients brittle SEI that fails suppress dendrite's growth. Herein, an ultrathin yet single‐ion conducting quasi‐solid‐state is presented by copolymerizing sodium (4‐vinylphenyl)sulfonate poly(vinylidene fluoride‐co‐hexafluoropropylene) (abbreviated as S‐PVSA) through atom transfer radical polymerization. The developed S‐PVSA gel exhibits (up 0.95) achieves tensile strength up 45.3 MPa even at (11 µm). When assembled in alkali metal batteries, Na||Na cell demonstrates exceptional stability over 8000 h cycling (>11 months), 3 V 2 (PO 4 ) retains 97% its initial capacity after 1400 cycles. Li||Li enables long‐term reversibility (over 1200 h) stable lithium plating/stripping current density 1 mA cm −2 60 °C. This work suggests new potential engineering rejuvenate batteries.

Язык: Английский

Процитировано

1
Muscle‐Inspired Self‐Growing Anisotropic Hydrogels with Mechanical Training‐Promoting Mechanical Properties DOI Open Access

Yulong Xia,

Xiaozhuang Zhou, Zhenzhen Wang

и другие.

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 17, 2025

Abstract Muscles are highly anisotropic, force‐bearing issues. They form via a process involving nutrient absorption for matrix growth and mechanical training toughening, in which cyclic disassembly‐reconstruction of muscle fibers plays critical role generating strong anisotropic structures. Inspired by this process, training‐associated growing strategy is developed preparing tough hydrogels. Using hydrogels made from polyvinyl alcohol (PVA)/tannic acid (TA) as an example, it demonstrated that the can absorb poly(ethylene glycol) diacrylate (PEGDA) disassembling their aligned nanofibrillar Incorporation PEGDA within induces PVA to crystal domains while subsequent restore fibrillar Such combining results expansion materials’ size (≈2 times) significant enhancement properties (Young's modulus: 2.4 2.85 MPa; ultimate tensile strength: 8.2 14.1 toughness: 335 465 MJ m −3 ). With high energy dissipation efficiency (≈0%), potential applications these adaptable envisioned impact‐protective materials, surgical sutures, etc.

Язык: Английский

Процитировано

1
Engineering Ultratough and Impact-Resistant Poly(urethane-urea) Elastomers for Advanced Protective Equipment DOI
Kesong Zhou, Kaiqiang Zhang, Luping Wang

и другие.

ACS Applied Polymer Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 7, 2025

Язык: Английский

Процитировано

0
Cross‐Scale Regulation of Coaxial Twisted Core‐Sheath Composite Yarn for Constructing Permeable Intelligent Fabric with Multiple Protection and Perception DOI Open Access
Guilin Wu, Junjie Pan, Wei Xia

и другие.

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 27, 2025

Abstract Smart fabrics with health protection, motion monitoring, and perception capabilities effectively managed optimized human health, significantly promoting the development of smart health. However, it remains challenging to achieve multifunctional mechanical robustness required for use in multiple scenarios without destroying characteristics softness air permeability. Here, a cross‐scale regulation strategy is presented based on chemical coupling‐physical twisting develop multiscale twisted core‐shell structure yarn. Benefiting from strong interfacial interactions coaxial wrapping structure, multi‐component functional particles are highly stably integrated into yarn while achieving ultra‐high strength (≈0.662 GPa). The resulting fabric exhibits good impact resistance (attenuate > 40% force), superior permeability (387.37 mm s −1 ), excellent eletromagnetic interference (EMI) shielding (36.1 dB), IR thermal camouflage, high triboelectric output ( V oc ≈39.1 V), ability sensitively perceive environment safety monitor real‐time. This study addresses long‐lasting challenge balancing functionality comfort offers new perspective developing next‐generation advanced wearable protective fabrics.

Язык: Английский

Процитировано

0
Effect of Rosin Structure Position in Chain Segment on Properties of Self-Healing Polyurethane DOI

Yuehan Qian,

Shanling Lu,

Yanghui Jiang

и другие.

ACS Applied Polymer Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 22, 2025

Язык: Английский

Процитировано

0
A neuromorphic mechanosensory skin DOI
Qianbo Yu, Jiaqi Liu, Wentao Xu

и другие.

Nature Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 28, 2025

Язык: Английский

Процитировано

0
Meniscus‐Inspired Segmented Network Intercalation Strategy: Stiffened yet Toughened Toward Healable Antifouling Materials DOI

Junhao Xie,

Hao Wu,

Jinqiu Tao

и другие.

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 30, 2025

Abstract Healable antifouling materials contribute a paradigm shift for extending marine infrastructure lifespan by forming continuable biofouling barriers. However, achieving sustainable performance in extreme mechanical stresses remains challenging due to the difficulty of integrating stiffness, toughness, and healing with efficacy. Inspired meniscus, which facilitates efficient load absorption distribution ability through remarkable resilience accurate intercalation between thigh calf bones, structural‐bioinspired segmented network strategy is proposed. This approach integrates secondary meniscus‐inspired bisphenol segments into primary, reorganizing rigid phases optimizing crosslinking primary ensure uniform stress dissipation augment molecular dynamism. design yields 212.32% increase Young’ s modulus (362.42 MPa), 55.62% improvement toughness (169.52 MJ m − 3 ), an enhancement self‐healing efficiency from 72.81% 98.75%. establishes new principle durable healable materials, combining enhanced properties resistance against biofouling.

Язык: Английский

Процитировано

0
Multi‐Armed Molecule Drives High Energy Dissipation and Stiffness via Physically Cross‐Linking DOI
Li Han, Wen-Hao Qi, Kai Liu

и другие.

Small, Год журнала: 2025, Номер unknown

Опубликована: Май 12, 2025

Abstract Damping materials, particularly viscoelastic polymeric are essential to mitigate or even eliminate vibration through energy dissipation. However, designing pure damping materials with high stiffness remains a challenge, which limits their application in constrained layer treatments for mechanical structures. Herein, chemical design of yet stiff supramolecular (SPMs) cross‐linked by small dendritic molecules quadruple H‐bonding units at the branch ends is proposed. These rationally designed not only enhance chain relaxation and improve performance original topology, but also maintain resultant level due newly generated robust H‐bonds. As result, these SPMs exhibit excellent across wide range frequencies temperatures, while simultaneously demonstrating key characteristics such as stiffness, adhesive properties, recyclability. Importantly, employed model system elucidate molecular mechanism underlying unique combination stiffness.

Язык: Английский

Процитировано

0