JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
·
2012
·Vol. 51
·期 5
·1205-1214
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IF 3.919
Xinjian Cheng,Cheng Peng,Daohong Zhang,Shuzheng Liu,Aiqing Zhang,Hui Huang,Jiansheng Lian
Novel cross-linked polyphosphazenes with remendable capacity have been synthesized through the Diels-Alder reactions. Their structure and properties were characterized by NMR, FT-IR, GPC, DSC, TGA SEM, and polarizing microscope. The process of Diels-Alder reaction (D-A reaction) and retro-Diels-Alder reaction (retro-D-A reaction) have been investigated by FT-IR, UV, and DSC. The cross-linked polyphosphazenes exhibited remendable capability only need a thermal treatment when they were cut by blade, any other treatments such as additional monomer or catalyst, surface treatment or pressure were not needed. © 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2013
研究领域:
材料科学
·
高分子化学
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DOI
高影响因子
Advanced Materials Interfaces
·
2018
·Vol. 5
·期 20
·1800571
·
IF 4.834
Hao Chang,Rui Guo,Ziqiao Sun,Hongzhang Wang,Yi Hou,Qian Wang,Wei Rao,Jing Liu
Liquid metals such as gallium and its alloys can be printed on various substrates to form electronic circuits. However, up to now there are still few methods for the direct writing of liquid metals on common printed paper. Here, a novel conductive material prepared by adding metal powder to a gallium alloy is introduced. The proposed material exhibits low liquidity, excellent plasticity, significantly enhanced adhesivity to paper substrates, which guarantee the stable and flexible electrical connection. The oxide film wrapping the nickel powder forms a skeleton for additional oxidation products, resulting in superior adhesion to paper. In addition, several paper flexible electronic applications are showcased to demonstrate the practical value and reparability of this material. This work paves the way for the design of a facile method of preparing paper electronics.
研究领域:
材料科学
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柔性电子
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电子工程
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DOI
高影响因子
APPLIED SURFACE SCIENCE
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2020
·
IF 6.182
Fengjun Chen,Jianhua Du,Shuai Huang
We proposed a novel superhydrophobic fabrication method based on ultrasonic cavitation. The collapse of cavitation bubbles eroded the surface to form a microstructure with high roughness. SiO 2 nanoparticles were then effectively anchored on the surface using cavitation jets to form a micro-nano composite structure. The superhydrophobic performance was evaluated on the basis of the water contact angle (WCA). The proposed method achieved robust superhydrophobic property, and the WCA of copper, brass and 304 stainless steel substrates exceeded 153.3°. The morphology and composition of the superhydrophobic surfaces were characterized using scanning electron microscopes and Fourier transform infrared, respectively. Results revealed that the SiO 2 particles were uniformly dispersed, and a flaw-free state was obtained by the surface. The samples exhibited excellent anti-corrosive durability during ultraviolet and outdoor testing and immersion in different corrosive solutions. The cavity generated by the cavitation erosion can be used as a container to suppress the loss of effective components. The micro-nano double layer structure was retained, and the WCA can be restored to the original level through functionalization again to give low surface energy. The prepared superhydrophobic surface was repairable. In addition, the WCAs of the copper foam and sponge were 157.0° and 159.6°, respectively.
研究领域:
材料科学
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表面工程
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DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2025
·
IF 7.7
Rui Wang,Wensong Ge,Zhenghao Li,Xiaoyang Zhu
Liquid metal-based conductive materials are widely used in wearable devices, electronic skins, and flexible robots due to their excellent conductivity and stretchability. However, the inherent high surface tension of liquid metal (LM) and the limitations of its rheological properties make it difficult to continuously and stably print conductive structures. Here, a liquid metal-based conductive composite material was developed that is suitable for material extrusion 3D printing technology and possesses high conductivity, adjustable stiffness and repairable features. This was achieved by incorporating liquid metal and silver nanoparticles (AgNP) into a hydrogel cross-linked with sodium alginate (SA) and polyvinyl alcohol (PVA). The addition of these particles not only ensures conductivity but also significantly reduces the surface tension of the liquid metal. AgNP can effectively connect the LM dispersed inside the hydrogel and increase the conductive path. The conductivity of the material is as high as 19011 S cm −1 . Utilizing this conductive material, stable printing of conductors with a minimum line width of 194 μm has been achieved. Finally, the application of the proposed novel liquid metal conductor in the field of myoelectric sensors and repairable circuits fully validates the feasibility of the material.
研究领域:
材料科学
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柔性电子
·
生物医学工程
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产品关联
DOI
高影响因子
POLYMER
·
2023
·
IF 4.6
Shuofeng Liang,Shuxiu Li,Chenrui Yuan,Chengwei Liu,Jiahui Chen,Si Wu
The development of healable polymers is crucial for the maintenance of underground pipeline systems during trenchless rehabilitation. While photocurable resins are commercial materials for this purpose, we introduce an innovative option: azobenzene-containing polymers (azopolymers) with photoinduced reversible solid-to-liquid transitions. The newly developed azopolymer comprises a methacrylate backbone and side chains incorporating hexyl spacers, azobenzene moieties, and dodecyl tails. We compared the thermal stability, efficiency of photoinduced solid-to-liquid transition, and adhesive strength among azopolymers with varying molecular weights . Subsequently, we identified the most suitable azopolymer for PVC pipe lining . The robust trans azopolymer inner layer maintains a solid state at ambient temperatures. Upon pipe damage, UV irradiation triggers trans -to- cis isomerization , leading to the conversion of the solid trans azopolymer into a liquid cis state. This flowing cis azopolymer effectively repairs cracks and can be reverted to its trans isomer via visible light irradiation or thermal relaxation. Unlike commercial photocurable resins, the developed azopolymers offer the advantage of multiple repair cycles. This study highlights the potential of azopolymers with photoinduced reversible solid-to-liquid transitions as innovative healable materials in trenchless rehabilitation technology.
研究领域:
材料科学
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土木工程
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高分子化学
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DOI
高影响因子
Nano Energy
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2017
·
IF 12.343
Wei Xu,Long-Biao Huang,Jianhua Hao
Triboelectric nanogenerator (TENG) as a promising mechanical energy harvester has been rapidly developed recently. However, its robustness and endurance are seriously challenged by frequent and inevitable mechanical impacts during operation. Herein, we demonstrate, for the first time, a fully self-healing TENG possessing the ability to recover its performance after damage by introducing healable polymer materials and electrodes consisting of small magnets into the device. Our works imply that high-performance self-healing TENG can be readily realized attributed to not only the excellent mechanical-healing capability of the employed healable polymer but also the quick electric-healing capability of the novel magnetic-assisted electrodes designed for the TENG. The measurements indicate that both the output voltage and current of the healed device can reach up to above 95% of their original values even after the 5th breakage-healing cycle. Additionally, the presented TENG also shows shape-tailorability and object-adaptability. This maximizes the effective contact area of device and further increases the electric output performance to benefit energy harvesting and self-powered sensing of versatile mechanical motions. This research will offer feasible strategies for developing novel mechanical energy harvesting devices and self-powered sensors with recoverability, robustness and adaption.
研究领域:
材料科学
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能源技术
·
纳米技术
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Xiaozhou Xin,Chunli Yang,Zhicheng Wang,Yin Xing,Chengjun Zeng,Liwu Liu,Yanju Liu,Jinsong Leng
Mechanical metamaterials are complicated artificial materials composed of periodically interconnected microstructures, exhibiting extraordinary mechanical properties not available in natural materials. However, the periodically interconnected design model results in most current metamaterials suffering from following limitations: i ) lack of modularity and repairability, ii ) damage transmittability, iii ) weak scalable fabrication and limited fabrication dimensions, and iv ) single functionality. Inspired by the connection mechanism of mortise-tenon structures and the configuration of brick–mortar structures, 4D printed mortise-tenon mechanical-electromagnetic multifunctional pixel metamaterials (MPMs) are developed in this work. The innovative binding constraint, derived from the Hanfu silk ribbon, has been proposed, achieving reliable connection of the MPM while suppressing damage transmission. The modular structure design strategy of the PMM enables large-scale and scalable manufacturing, while also achieving repairability. The developed mechanical-electromagnetic MPMs have multifunctional properties, including lightweight, energy absorption, electromagnetic wave absorption (RL min –32.84 dB) and reconfigurability, which have a wide range of application prospects in the field of electromagnetic stealth equipment.
研究领域:
机械工程
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材料科学
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电磁学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Zhanjian Liu,Congyuan Zhang,Jing Jing,Xiguang Zhang,Chijia Wang,Fatang Liu,Minghu Jiang,Huaiyuan Wang
Superhydrophobic surfaces integrated with great water-repellency have been extensively studied while their practical applications are restrained by the infirm rough structures and poor chemical durability. In this study, an ultra-durable superhydrophobic polyphenylene sulfide (PPS) composite coating with repairable microstructures has been constructed by innovatively introducing the expandable graphite (EAG) and elastic fluororubber. Hydrophobic EAG@SiO 2 nanoparticles synthesized by sol–gel and modified with perfluorodecyltrichlorosilane (PFTS) can expand to establish abundant micro/nanostructures for superhydrophobicity during the thermal treatment. Additionally, fluororubber powders as elastic micro-supports endows the surface structures with reversible deformation to resist the external mechanical damage. The prepared coating can restore its microstructures and superhydrophobicity even after 2000 abrasion cycles under a pressure of 125 kPa, exhibiting a fantastic mechanical durability. Moreover, the fabricated coating possessed good anti-corrosion and anti-scaling properties in high salinity oil/water emulsion due to the intrinsic oleophilicity of EAG@SiO 2 and fluororubber, which can transform the surface shielding layer from fragile air film to stable oil film to impede scaling and corrosion mediums. Simultaneously, the prepared superhydrophobic coating also demonstrated outstanding self-cleaning and anti-fouling properties to prevent surface contamination by diatomite or glutinous slurry during outdoor application. Thus, this ultra-durable superhydrophobic coating with extraordinary repairable microstructures and anti-corrosion/scaling capabilities will be expected to open a new avenue to realize the large-scale applications of superhydrophobic coatings in harsh environments.
研究领域:
材料科学
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表面工程
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产品关联
DOI
高影响因子
POLYMER
·
2024
·
IF 4.1
Xinlong Liu,Jiazi Ma,Bing Li,Longmeng Du,Chuanjin Wang,Yuan Ji,Wenhui Zheng,Qi Dong,Yong Ma,Tingxi Li,Zaixing Jiang
Flexible strain sensors based on double network conductive hydrogels have attracted much attention due to their great potential for human motion health and smart detection. However, the development of conductive hydrogels with high sensitivity and anti-freezing properties for a wide range of use environments is still a challenge. Herein, a novel organohydrogel-based PVA-P-TA-MWCNTs (PPTME) double network capable of pressure and strain sensing was reported with high ambient stability, excellent anti-freezing capability, smart reparability and superior sensitivity. The multiple interactions within the PPTME organohydrogel have been substantiated through Density Functional Theory (DFT) analysis. The organohydrogel utilizing strong hydrogel bonds, crystalline microphases, and chain entanglement of PTA/PVA exhibited good mechanical properties (374%) and excellent cycling performance. Meanwhile, owing to the addition of H 2 O/EG (ethylene glycol) binary solvent, this organohydrogel exhibited long-term water retention (15 days), anti-freezing properties (−61.9 °C), greatly improving the applications at low temperatures. Furthermore, the assembled pressure sensors showed ultrahigh sensitivity (1.88 kPa −1 ) in wide detection range (0–266.2 kPa). Based on these excellent properties, a flexible organohydrogel sensor was prepared, demonstrating its enormous potential in the field of human motor behavior detection and wearable.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
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2022
·
IF 4.966
Xiaowei An,Yi Ding,Ying Xu,Jian Zhu,Chunyang Wei,Xiangqiang Pan
The cross-linked structure of thermosetting carbon fiber composites makes it difficult to degrade and recycle, especially the non-destructive recovery and recycling of high value-added carbon fiber is a major challenge for the sustainable development of carbon fiber composites. The high-efficiency degradation of chemical health and the high performance of materials are mutually restricted and difficult to balance. We report a epoxy resin networks, prepared through ring-opening reaction of epoxy resin with diselenide-labeled diaromatic amine, that can be turned into catalyst-free vitrimer material by exchange of diselenide bonds. When the diselenide bonds are introduced, specific relaxation times and activation energy of the vitrimer have been measured. Based on the dynamic diselenide bonds, this new vitrimer materials can be reprocessed and repaired upon heating via swift metathesis reactions . In addition, the diselenide crosslinks thermoset materials, which have high modulus and high glass transition temperature , exhibit considerable reprocessability, recyclability and reparability. Furthermore, recyclable carbon fiber reinforced composites (CFRC) are prepared using dynamic diselenide covalent network materials as binders.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2021
·Vol. 32
·期 11
·4223-4232
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IF 3.665
Yubin Li,Zhijian Yang,Xu Zhao,Jianhu Zhang,Ling Ding,Liping Pan,Congmei Lin,Xue Zheng
A novel thermally mendable polyurethane binder for energetic composites was designed and prepared via the Diels-Alder (DA) cycloaddition reaction between a furan functionalized polycaprolactone (PCL) prepolymer and a bismaleimide compound. The structures and properties of synthesized PCL-DA-PU were fully characterized via Proton Nuclear Magnetic Resonance ( 1 H-NMR) and Fourier Transform Infrared spectroscopy (FT-IR), Gel Permeation Chromatography (GPC), Thermogravimetric Analysis (TGA), and Differential Scanning Calorimetry (DSC) measurements. As-prepared material showed good self-healing ability of scratches by virtue of combining the shape recovery effect of PCL segments favoring scratch closure with the re-crosslinking of the cleaved DA bonds, which was evidenced by optical microscopy and tensile analysis. A scratch healing efficiency determined by tensile tests of about 89% was achieved. Moreover, with the contribution of DA bonds in PCL-DA-PU binder, the microcracks and other damages in the TATB based energetic composites were almost mended and the mechanical strength can recovery above 78%.
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
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2025
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IF 6.3
Yulu Wang,Fengxiang Cao,Gang Liu,Zhen Fang,Zhuhui Qiao
The development of biobased thermosetting materials has garnered considerable interest as a promising alternative to conventional thermosets, which are often constrained by permanent cross-linking and dependence on petroleum-derived feedstocks. Nevertheless, both traditional and bio-based thermosets frequently exhibit limitations in reprocessability and recyclability. In this study, a novel epoxy covalent adaptable network (CAN) incorporating dynamic dual-crosslinking bonds (D-DCB) was synthesized from lignin-derived vanillin (VA) and glycerol propoxylate triglycidyl ether (GPTE). Specifically, a trialdehyde monomer (TAM) was first prepared from VA and GPTE, which subsequently reacted with disulfide-containing compounds (4,4′-diaminodiphenyl disulfide and cystamine) to form bio-based CANs (namely, TAM-APDS and TAM-Cys, respectively). This network synergistically combines imine and disulfide bonds as dynamic covalent units. The imine bonds not only provide fundamental mechanical strength and structural stability but also contribute UV-shielding properties due to their conjugated structure. The disulfide bonds impart reprocessability, self-healing capability, and degradability-enabling rapid disulfide exchange reactions within 1 h using a thiol/ethanol solution at 60 °C. Lap-shear adhesion tests on various substrates demonstrated that the resulting CANs exhibit a high strength of approximately 7 MPa on iron substrates, highlighting their potential as high-performance sustainable adhesives.
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DOI
高影响因子
危险品化学品经营许可证（带存储）