High-performance shape memory epoxy resin with high strength and toughness: Prepared by introducing hydrogen bonds through polycaprolactone and low melting point alloy

Composites Science and Technology, Год журнала: 2024, Номер 250, С. 110510 - 110510

Опубликована: Фев. 24, 2024

Язык: Английский

---

Thermo-reversible DA bonds-based polyurethanes with both excellent comprehensive mechanical property and remarkable room temperature self-healing capability

Colloids and Surfaces A Physicochemical and Engineering Aspects, Год журнала: 2025, Номер unknown, С. 136398 - 136398

Опубликована: Фев. 1, 2025

Язык: Английский

---

Dynamic Covalent Adaptable Polyimide Hybrid Dielectric Films with Superior Recyclability

Advanced Materials, Год журнала: 2023, Номер unknown

Опубликована: Июнь 29, 2023

Abstract Polyimides (PIs) used in advanced electrical and electronic devices can be electrically/mechanically damaged, resulting a significant waste of resources. Closed‐loop chemical recycling may prolong the service life synthetic polymers. However, design dynamic covalent bonds for preparing chemically recyclable crosslinked PIs remains challenging task. Herein, new PI films containing oligomer, chain extender, crosslinker are reported. They exhibit superior recyclability excellent self‐healable ability owing to synergistic effect extender crosslinker. The produced completely depolymerized an acidic solution at ambient temperature, leading efficient monomer recovery. recovered monomers remanufacture without deteriorating their original performance. In particular, designed serve as corona‐resistant with recovery rate approximately 100%. Furthermore, carbon fiber reinforced composites (CFRCs) matrices suitable harsh environments recycled multiple times non‐destructive up preparation high‐strength adaptable hybrid from simple oligomers, extenders, crosslinkers provide solid basis sustainable development fields.

Язык: Английский

---

Functional and Environmental Friendly Polyimine Elastomer Based on the Dynamic Covalent Network for a Flexible Strain Sensor

Macromolecules, Год журнала: 2023, Номер 56(23), С. 9766 - 9777

Опубликована: Ноя. 29, 2023

With environmental concerns increasing, the development of durable, degradable, and reprocessable elastomers is crucial for advancement environmentally friendly wearable electronics. Herein, self-healing, polyimine with a cross-linked network constructed by dynamic imine bonds were synthesized under room temperature flexible strain sensor. Owing to formation microphase separation structure polyetheramine as soft segments adipic acid dihydrazide hard segments, obtained elastomer exhibited superior mechanical properties elongation at break 1158% tensile strength 2.51 MPa. Moreover, endowed outstanding self-healing capability reprocessability. The healing efficiency reached 96.0% after 24 h, reprocessed maintained 80.6% original three reprocessing cycles. In addition, was able completely degrade into monomers acidic condition within 180 min. elastomer-based sensor liquid metal conductive material processed excellent recovery ability sensing performance even being cut two halves. findings in this work conceivably stand out new methodology preparation functional

Язык: Английский

---

Self-Healing Nanocomposites—Advancements and Aerospace Applications

Journal of Composites Science, Год журнала: 2023, Номер 7(4), С. 148 - 148

Опубликована: Апрель 7, 2023

Self-healing polymers and nanocomposites form an important class of responsive materials. These materials have the capability to reversibly heal their damage. For aerospace applications, thermosets thermoplastic been reinforced with nanocarbon nanoparticles for self-healing structural This review comprehends use in sector. The behavior depends on factors such as microphase separation, matrix–nanofiller interactions inter-diffusion polymer–nanofiller. Moreover, can be achieved through healing agents nanocapsules nanoparticles. mechanism has found operate via physical or chemical interactions. used design components, panels, laminates, membranes, coatings, etc., recover damage space Future research must emphasize new high-performance polymeric structures.

Язык: Английский

---

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

Macromolecules, Год журнала: 2023, Номер 56(17), С. 6633 - 6643

Опубликована: Авг. 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.

Язык: Английский

---

High biomass content, anti-flammable and degradable epoxy thermosets by curing a tyramine-derived epoxy monomer with a furan-derived diamine for non-destructively recyclable carbon fiber composite application

Green Chemistry, Год журнала: 2024, Номер 26(9), С. 5519 - 5530

Опубликована: Янв. 1, 2024

High biomass content, anti-flammable and degradable epoxy thermosets were prepared by curing a tyramine-derived monomer (TVEP) with furan-derived diamine (DFDA) for non-destructively recyclable carbon fiber composite application.

Язык: Английский

---

High strength, self-healing and hydrophobic fully bio-based polybenzoxazine reinforced pine oleoresin-based vitrimer and its application in carbon fiber reinforced polymers

Chemical Engineering Journal, Год журнала: 2024, Номер 484, С. 149585 - 149585

Опубликована: Фев. 12, 2024

Язык: Английский

---

Rapid Self-Healing and High-Mechanical-Strength Epoxy Resin Coatings Incorporating Dynamic Disulfide Bonds

ACS Applied Polymer Materials, Год журнала: 2024, Номер 6(8), С. 4778 - 4788

Опубликована: Апрель 12, 2024

Smart materials with outstanding self-healing and reprocessable capabilities are highly desirable for next-generation coatings that can repair damaged in a timely autonomous manner. However, their prevalent use practical applications is currently hindered by various limitations, such as low mechanical strength, long healing time, expensive raw materials. Herein, we prepared epoxy resin coating (EP-SS-DAAX) excellent properties incorporating dynamic disulfide bonds flexible chains into the network. The presence of promoted mobility molecular exchange bonds, resulting efficient high toughness coating. EP-SS-DAA2 obtained tensile strength 33.30 MPa breaking elongation 150.55% after 1 h on basis achieving efficiency (93.68%) be reprocessed through hot-pressing recovery rate 107.03%. As proof concept, healed demonstrated anticorrosive effects being immersed 3.5 wt % NaCl aqueous solution 7 days. This study provides feasible approach to obtaining high-performance resins have extraordinary integrated performance.

Язык: Английский

---

Lignin self-healing coatings based on thermo-reversible Diels-Alder reaction for anticorrosion applications

Progress in Organic Coatings, Год журнала: 2024, Номер 191, С. 108428 - 108428

Опубликована: Апрель 19, 2024

Язык: Английский

---