Small
·
2023
·
IF 13.3
Dengfeng Zhang,Xiujuan Li,Junyue Li,Qiye Wang,Xuemei Dong,Yueyue Wu,Zifan Li,Xinyi Xie,Zhengdong Liu,Fei Xiu,Wei Huang,Juqing Liu
Ionogels are extremely soft ionic materials that can undergo large deformation while maintaining their structural and functional integrity. Ductile ionogels can absorb energy and resist fracture under external load, making them an ideal candidate for wearable electronics, soft robotics, and protective gear. However, developing high-modulus ionogels with extreme toughness remains challenging. Here, a facile one-step photopolymerization approach to construct an acrylic acid (AA)-2-hydroxyethylacrylate (HEA)-choline chloride (ChCl) eutectogel (AHCE) with ultrahigh modulus and toughness is reported. With rich hydrogen bonding crosslinks and phase segregation, this gel has a 99.1 MPa Young's modulus and a 70.6 MJ m −3 toughness along with 511.4% elongation, which can lift 12 000 times its weight. These features provide extreme damage resistance and electrical healing ability, offering it a protective and strain-sensitive coating to innovate anticutting fabric with motion detection for human healthcare. The work provides an effective strategy to construct robust ionogel materials and smart wearable electronics for intelligent life.
研究领域:
材料科学
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生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 42
·24477-24485
·
IF 10.733
Jie Liu,Jinqiu Zhou,Mengfan Wang,Chaoqun Niu,Tao Qian,Chenglin Yan
There is a contradiction between achieving a high modulus solid polymer electrolyte (SPE) and good interface contact in all-solid-state lithium metal batteries to prohibit the dendrite growth and increase the cell cyclability, respectively. Herein, we report a new functional-gradient-structured ultrahigh modulus SPE (FG-SPE) by integrating a ceramic-rich phase and polymer-rich phase. The ceramic-rich phase physically prohibits the dendrite growth, while the polymer-rich phase improves the interface compatibility between the cathode and electrolyte. As a result, this ultrahigh modulus solid polymer electrolyte renders a low charging voltage polarization of 0.5 mA h cm−2 for FG-SPE-based symmetrical batteries. All-solid-state Li/LiFePO4 batteries based on this material show a high specific capacity of 163.2 mA h g−1 at 0.1C, and a high reversible capacity could still be obtained even at a rate of 2C. Importantly, the active material could achieve a high mass loading of 15.6 mg cm−2, which is significant for practical applications.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Chunjie Li,Xin Qian,Mengyuan Hao,Xuefei Wang,Shiqi Zhu,Mei Guo,Haoting Gong,Yonggang Zhang
PAN-based carbon fibers have been widely used in aerospace materials due to high specific strength , high specific modulus and many other outstanding features. As one kind of carbon-based electromagnetic wave (EMW) absorption material, carbon fibers are expected to absorb more EMW due to multiple polarization losses and large specific surface area in which EMW can be reflected many times. However, they also have certain disadvantages when used as EMW absorption material due to their high dielectric constant, low permeability and low reflection loss strength. Herein, a facile hydrothermal synthesis method was used to construct the three-dimensional (3D) bimetal-organic framework compound onto the surfaces of polyacrylonitrile(PAN)-based ultrahigh modulus carbon fibers (UHMCFs). Through the control of key parameters in the synthesis process, 3D bimetallic ZIF particles with different morphologies were assembled on the fiber surfaces, and a further high temperature heat treatment resulted in significantly improved EMW absorption properties. The results showed that three fibrous structures including rod-shaped, threadlike and flower-like morphologies had been formed with the introduction of CoZn-ZIFs. Among them, the uniform structure of rod-shaped sample could be preserved after carbonization and it also showed optimal EMW absorption performance, e.g. its minimum reflection loss (RL min ) and effective absorption bandwidth (EAB) values were − 67.67 dB (EMW loss above 99.9 %) and 4.28 GHz, respectively, with the thickness of 2.00 mm. In the final, the EMW absorption mechanism of CoZn-bimetallic ZIF decorated UHMCFs including interfacial loss, conductive loss, polarization loss, multiple scattering and excellent impedance matching was discussed in detail.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Junliang He,Ji Zhou,Jizhen Tian,Shuai Li,Yunfei Gao,Zhengguang Heng,Yang Chen,Huawei Zou,Mei Liang
Data-driven methods or computational techniques have opened new paradigms for the rational design of materials. The introduction of specific groups could largely enhance anti-flammable and mechanical properties for epoxy resins. In this work, two high-performance epoxy resins (mABAEP and SAAEP) containing assisted flame-retardant “genes” were designed adopting a material genome approach combined with DFT calculations and synthesized through a one-pot method. The resin can be automatically molded in the presence of a heat source without mixing with hardener, called “self-curing”, which considerably increases the density of assisted flame-retardant “genes”. The presence of such “genes” in epoxy resin could promote char layer formation and release nonflammable gases during combustion, further improving flame retardancy. On the other hand, those “genes” with strong polarity enhance intermolecular forces thus reducing the motility of chain segments. The bending test shows that SAASC (SAAEP after self-curing) has higher flexural modulus and flexural strength (5155 MPa, 125.7 MPa) compared to E51/DDM (2564 MPa, 103.7 MPa), with 101% and 21% improvement respectively. In addition, SAASC has a higher glass transition temperature (217 °C) and char yield (45.0%), as well as superior antibacterial properties, which can satisfy multifunctional applications.
研究领域:
材料科学
·
化学工程
·
计算化学
✓ 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）