JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 141
·期 10
·e55070
·
IF 3
Zhichao Zhang,Muqun Wang,Wenhao Cao,Xueying Duan,Ting Xie,Zequan Li,Wei Gao,Fan Luo
Self-healing materials exhibit the ability to repair damage and restore their function. Shape memory assisted self-healing (SMASH) materials are smart materials that automatically close localized microscopic cracks and repair these cracks by bonding damaged surfaces. A novel temperature-responsive SMASH polymer composite was established by introducing Diels–Alder bonds (D–A) in polyurethane. In this article, dynamic D–A produced by the polymerization of furfurylamine and 4,4’-bismaleimidodiphenylmethane was introduced into the molecular chain to enable the polyurethane elastomers containing D–A bonds to acquire self-repairing capability. The self-healing properties of the synthesized material were examined using polarized light microscopy, which revealed excellent fracture healing. The mechanical properties before and after healing were tested, in which the initial maximum tensile strength of the material could reach 7.9 MPa, and the maximum tensile strength after self-healing was 7.3 MPa, with a repair rate of 91.8%; the maximum elongation was 585.9%, and the maximum elongation after self-healing was 469.5%, with a repair rate of 80.1%. In addition, this material has excellent repair performance for microcracks of different scales, and the micromolten part of the surface after heating can fill the micrometer cracks, play the role of antiaging, and extend the service life of the material.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULES
·
2015
·
IF 5.8
Yuqin Min,Shuyun Huang,Yuxiang Wang,Zhijun Zhang,Binyang Du,Xinghong Zhang,Zhiqiang Fan
The degradation and reuse of epoxy thermosets have significant impact on the environments. We report that an epoxy–amine thermoset embedded with Diels–Alder (DA) bonds was transformed into soluble polymers via sonochemistry under mild temperature (ca. 20 °C) for the first time. Sonication could effectively induce the position-oriented cleavage of DA bonds (i.e., retro-DA) of the fully swelled epoxy thermoset in dimethyl sulfoxide (DMSO), leading to the soluble polymers. Of importance, such sonochemical process could be regulated on demand via switching on-and-off of the sonication. The obtained soluble polymers could be recured to form epoxy–amine thermosets via DA reaction. This sonochemical method might provide an unprecedented and efficient way to the controlled degradation and recycling of the epoxy thermosets containing the dynamic covalent bonds likes DA groups.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2025
·
IF 9.8
Mengqi Ma,Zepu Wang,Kaixiang Chen,Junyue Huang,Wei Zeng,Wenhong Ruan,Mingqiu Zhang
All-solid-state lithium metal batteries (LMBs) are widely recognized as one of the most promising next-generation energy storage technologies. However, their commercialization is still hampered by insufficient interfacial contact between the solid electrolyte and the cathode, along with low ionic conductivity in these solid components. In this work, a highly efficient “solid-polymer-solid” Li + transport channel was constructed based on a Diels–Alder (DA) crosslinked polyurethane (PU) incorporated with lithium bis(trifluoromethyl sulfonyl)imide (PUDAL). This polymer system was applied simultaneously as both the cathode binder and the solid electrolyte. The interfacial resistance between the solid electrolyte and the cathode is significantly reduced through the construction of an integrated interfacial structure. An intimate contact at the molecular level is generated by the DA bonds, which enhances the compatibility and stability of the cathode-electrolyte interface and facilitates continuous Li + transport pathways. The utilization of DA bonds for cross-linking solid polymer electrolytes enables the preparation of solid-state electrolytes with enhanced electrochemical and mechanical properties. These improved characteristics contribute to more uniform lithium metal deposition and effective suppression of lithium dendrite growth. The Li symmetric cells employing PUDAL exhibited stable cycling for over 1500 hours (0.1 mA cm -2 ) at both 60 °C and 30 °C. Furthermore, the integrated LFP-PUDAL |PUDAL| Li full cells demonstrated remarkable long-term charge/discharge stability and high capacity retention under the same temperature conditions.
研究领域:
材料科学
·
电化学
·
能源存储
·
固体离子学
·
高分子材料
·
电池技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2025
·
IF 14.1
Xiangyu Tang,Linlin Zhao,Yunfeng Guo,Ying Wang,Zhenke Wei,Xinyan Fan,Zefang Xiao,Haigang Wang,Yanjun Xie,Yonggui Wang
The growing environmental crisis caused by petroleum-based polymers has intensified the development of sustainable alternatives, with many biomass-derived polymers demonstrating potential for degradability, renewability, and low carbon footprints, though these properties can vary depending on structure and processing. However, traditional bio-based systems often lack tunability in mechanical properties, making it challenging to achieve both high strength and ductility. Herein, we report a high-performance, recyclable bio-based film (CAF-L) constructed via Diels-Alder dynamic covalent chemistry between furfuryl-functionalized cellulose acetate and maleimide-modified lignin. Thermally responsive dynamic Diels-Alder bonds, activated through heat-treatment, enable programmable network crosslinking that allows a smooth transition between strength- and ductility-dominated regimes, while maintaining high mechanical performance (tensile strength up to 52.3 MPa and elongation at break up to 545%). Structural characterization and molecular simulations reveal that Diels-Alder bond dynamics drive thermally induced structural reorganization of the polymer network, imparting rare adaptivity to biomass-based systems. In addition, CAF-L films exhibit outstanding UV shielding, oxygen barrier properties, and dual-mode recyclability through solvent dissolution and hot pressing. This work provides a scalable platform for constructing mechanically tunable, structurally reconfigurable, and environmentally resilient cellulosic bioplastic for sustainable packaging and circular material systems.
研究领域:
高分子科学
·
材料工程
·
可持续化学
·
生物塑料
·
动态共价化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Chemistry Frontiers
·
2022
·Vol. 6
·期 9
·1137-1149
·
IF 8.683
Sheng Jie Yuan,Zhong Quan Peng,Min Zhi Rong,Ming Qiu Zhang
To enhance the intrinsic thermal conduction of liquid crystalline epoxy (LCE), a novel strategy based on interlocked polymer networks is proposed. Two cured versions of LCE respectively containing Schiff base bonds and Diels–Alder (DA) bonds are synthesized, and then well mixed in a co-solvent enabling topological reorganization of the single LCE networks via the reversible reactions of the built-in dynamic covalent bonds. The thermal conductivity of the interlocked LCE networks prepared according to the optimal formulation offered by orthogonal design is significantly increased in comparison with the parent single-LCE networks. Besides, although the thermal conductivity of the raw LCE employed in the current work is not that high and the mesogen monomer has the simplest structure, the interlocked networks are able to bring the liquid crystals into full play without changing the chemical structure of the mesogens, as characterized by the very high thermal conductivity per unit weight of liquid crystal. Further investigation of the underlying mechanism suggests that the synergy among the mesogens, the interlocked structure and the inter-component hydrogen bonds accounts for the promotion of heat transmission. Considering the easy access of the relevant chemicals and the simplicity of the materials preparation, the technology developed in the present work may have remarkable potential for future applications.
研究领域:
材料科学
·
高分子化学
·
热工程
✓ 已验证
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2022
·
IF 9.879
Haiyang Li,Xuanhe Ru,Ying Song,Huanping Wang,Chenhui Yang,Lei Gong,Zhenguo Liu,Qiuyu Zhang,Yanhui Chen
As the application environment of electromagnetic interference (EMI) shielding composites becomes increasingly complex and changeful, the polymer materials with excellent mechanical properties and EMI shielding effectiveness (EMI SE) are highly desired, in order to maintain the long-term operation of equipment. Herein, we report a series of flexible and self-healing EMI shielding composites, which are developed by first constructing a highly electrically conductive 3D porous Ti 3 C 2 T x MXene/reduced graphene oxide (rGO) hybrid aerogel (MRG) by the freeze-drying and chemical reduction methods, and subsequently introducing dynamic crosslinked polyurethane containing Diels–Alder bonds (PUDA) into MRG by the vacuum assisted impregnation method. The 3D MXene/rGO/PUDA (MRGP) composites show a high EMI SE of 39.1 dB at an ultra-low 0.46 vol% of MXene and 0.65 vol% of rGO loading in the range of X-band (8.2–12.4 GHz), and the EMI SE can recover to 34.1 dB after three times of severing/healing cycles, retaining 91.4% of the EMI SE of the initial sample. In addition, the EMI SE of thrice healed MRGP composite hardly changes after 5000 bending cycles. The flexible and self-healing EMI shielding PUDA composites in our work show great potential application for long-term protection of portable communication electronic equipment.
研究领域:
材料科学
·
纳米技术
·
电气工程
·
高分子科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2023
·
IF 5
Jing Yi,Yuze Dai,Yuxuan Li,Yuanpeng Wu,Min Jiang,Guangyuan Zhou
The preparation of recyclable multifunctional biobased cross-linked polymers for different application environments and reducing dependence on petroleum products are important for sustainable development. Herein, we successfully synthesized a series of environmentally friendly, shape memory, adhesion, self-healing, and recyclable biobased polyester networks using 2,5-furandicarboxylic acid (FDCA) and 5,5′-((dodecylazanediyl)bis(methylene))bis(furan-5,2-diyl))dimethanol (DoDM) derived from renewable materials by introducing reversible Diels–Alder bonds with the addition of bismaleimide (BMI). Profiting from the freely rotating difuran ring group in DoDM, the cross-linked network with tunable thermal and mechanical properties can be constructed and present fascinating versatility. A kinetic analysis suggests that the reaction follows second-order kinetics, and the calculated activation energy is 48.1 kJ/mol with an optimal temperature of 60 °C. Different cross-linking densities of PDoF/BMI networks result in glass transition temperatures varying from 19 to 47 °C, tensile moduli from 22 to 529 MPa, and elongations at break from 5 to 120%. The PDoF/BMI network has a good shape memory performance: it can be fixed to a temporary shape below Tg and restored to its original shape by heating above Tg, with a shape recovery rate of up to 98%. In addition, the PDoF/BMI 10:1 polymer network can be used as a solvent-free adhesive with strong adhesion to glass (3.1 ± 0.5 kPa). The dynamic bond provides a self-healing response that can repair the surface scratch damage and contribute to 87% of the tensile stress recovery. Meanwhile, the PDoF/BMI film can be recovered after shredding, implying the good recyclability of the PDoF/BMI polymer. Therefore, the PDoF/BMI polymer, as a biobased multifunctional environmentally friendly material, has potential application prospects in a wide range of practical fields.
研究领域:
材料科学
·
聚合物化学
·
可持续发展
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）