Ultrastrong, High Fire Resistance, Repairable, and Recyclable Fluorinated Biobased Polyimine Networks

ACS Materials Letters, Год журнала: 2024, Номер 6(8), С. 3899 - 3908

Опубликована: Июль 25, 2024

Traditional commercial thermosetting materials are currently facing significant challenges in terms of reprocessing, degradation, and recycling because a large demand petroleum resources, leading to environmental burden. In our work, trialdehyde monomer synthesized by renewable resource reacted with 1,4-Bis(4-amino-2-trifluoromethylphenoxy)benzene 1,4-Bis(4-aminophenoxy)benzene form dynamic cross-linked network called BQPs. The fluorinated biobased polyimine material exhibits exceptional mechanical properties tensile strength 96.2 MPa, which is much higher than plastics such as polycarbonate (∼65 MPa). Moreover, it demonstrates excellent flame retardancy achieving level V0 rating the UL-94 test value 50% limiting oxygen index test. Additionally, can be easily reprocessed within 10 min at high temperature (160 °C) rapidly repaired solvent. Overall, this high-performance product will significantly contribute expanding development materials.

Язык: Английский

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Soft‐Rigid Construction of Mechanically Robust, Thermally Stable, and Self‐Healing Polyimine Networks with Strongly Recyclable Adhesion

Small, Год журнала: 2024, Номер unknown

Опубликована: Окт. 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.

Язык: Английский

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Biomimetic Nanostructured Polyimine Aerogels with Graded Porosity, Flame Resistance, Intrinsic Superhydrophobicity, and Closed-Loop Recovery

ACS Nano, Год журнала: 2024, Номер 18(52), С. 35465 - 35479

Опубликована: Дек. 16, 2024

Polymer aerogels, with their porous and lightweight features, excel in applications such as energy storage, absorption, thermal insulation, making them a sought-after new material. However, the covalent cross-linking networks of current polymer aerogels result unsustainable manufacturing processing practices, persistently depleting our finite natural resources causing significant global environmental impacts. Herein, we have constructed high-performance dynamic aerogel network using biobased materials, its structure green sustainability akin to those plants nature. Abundant reversible points endow ultrafast degradation capabilities, enabling allow for closed-loop chemical monomer recovery reprocessing. Furthermore, utilizing highly active network, net-zero emission material reuse reprocessing can be achieved. Additionally, controlled features multilevel roughness nanostructured surface similar lotus leaf biomimetic pore structure, contributing anisotropy. The distinctive composition high compressive strength (2.2 MPa) vertically, low conductivity (0.0257 W/(m·K)) horizontally, outstanding fire resistance (LOI is 36%). Notably, demonstrates highest hydrophobicity among polyimine contact angle 154°. excellent performance variety potential oil–water separation, directional transport, phase change it anticipated that these will greatly benefit from systematic upgrades recyclability

Язык: Английский

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Next-generation vitrimer composites for future mobility: Balancing sustainability and functionality – A perspective

European Polymer Journal, Год журнала: 2025, Номер unknown, С. 113967 - 113967

Опубликована: Май 1, 2025

Язык: Английский

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Development of Fluorenyl‐Based Copolyimines with Adjustable Mechanical Properties, Recyclability and Friction Resistance

Chemistry - A European Journal, Год журнала: 2024, Номер 30(43)

Опубликована: Июнь 4, 2024

Dynamic polyimines are a class of fascinating dynamic polymers with recyclability and reparability owing to their reversible Schiff-base reactions. However, balancing the properties mechanical strength presents major challenge due dissociative associative nature imine bonds. Herein, we introduced bulky fluorene groups polyether amine into skeleton polyimine networks achieve tradeoff in comprehensive properties. The resulting (Cardo-DPIs) were successfully synthesized by combining rigid diamine 9,9-bis(4-aminophenyl)fluorene flexible amine, demonstrating high tensile 64.7 MPa. Additionally, Cardo-DPIs films more content exhibited higher water resistance, glass transition temperature wear-resisting ability. Moreover, not only efficiently underwent thermal reshaping, but also excellent self-healing capabilities chemical degradation acidic solutions. Furthermore, can fully closed-loop recovery free solution for 2 h at room temperature. This study broadens scope materials promotes balanced development functional

Язык: Английский

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Sustainable poly(imide‐imide) vitrimer based on multiple dynamic covalent bonds

Journal of Applied Polymer Science, Год журнала: 2024, Номер unknown

Опубликована: Сен. 18, 2024

Abstract Polyimide materials with high mechanical strength are widely used in various fields, but pose certain challenges achieving sustainable material utilization. A poly(imide‐imide) vitrimer (ADTA) based on multiple dynamic covalent bonds (imide, imine, and disulfide bonds) was constructed by preparing vanillin difunctionalized derivatives (DVA) for aldolamine condensation reactions bis‐amine monomers (ATFA) tris(2‐aminoethyl) amines (TAEA) imide structures. The ADTA has good 5% thermal stability T d (278.87°C), energy storage modulus E (2421.26 MPa), fast relaxation time (36.39 s). properties of the enhanced more stable alicyclic structure structure. also demonstrated excellent solvent resistance self‐healing properties. This study provides a new option development utilization polyimide materials.

Язык: Английский

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Reversible Schiff-base chemistry enables thermosetting smart composites with versatile properties

Composites Communications, Год журнала: 2024, Номер 52, С. 102153 - 102153

Опубликована: Ноя. 5, 2024

Язык: Английский

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Polymer-to-Monomers Chemically Recyclable Poly(imide-imine) Plastics with Extreme-Condition Resistance and Flame Retardancy

Chinese Journal of Polymer Science, Год журнала: 2024, Номер 42(10), С. 1525 - 1535

Опубликована: Сен. 2, 2024

Язык: Английский

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