JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
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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
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高分子化学
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产品关联
DOI
高影响因子
Advanced Materials Interfaces
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2018
·Vol. 5
·期 20
·1800571
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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
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2020
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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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产品关联
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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产品关联
DOI
高影响因子
POLYMER
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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
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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
BIOMACROMOLECULES
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2024
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IF 5.5
Changgi Hong,Haeun Chung,Gyubok Lee,Dongwoo Kim,Zhuomin Jiang,Sang-Heon Kim,Kangwon Lee
Wound dressings made from natural-derived polymers are highly valued for their biocompatibility, biodegradability, and biofunctionality. However, natural polymer-based hydrogels can come with their own set of limitations, such as low mechanical strength, limited cell affinity, and the potential cytotoxicity of cross-linkers, which delineate the boundaries of their usage and hamper their practical application. To overcome the limitation of natural-derived polymers, this study utilized a mixture of oxidized alginate and gelatin with 5 mg/mL polycaprolactone (PCL):gelatin nanofiber fragments at a ratio of 7:3 (OGN-7) to develop a hydrogel composite wound dressing that can be injected and has the ability to be remended. The in situ formation of the remendable hydrogel is facilitated by dual cross-linking of oxidized alginate chains with gelatin and PCL/gelatin nanofibers through Schiff-base mechanisms, supported by the physical integration of nanofibers, thereby obviating the need for additional cross-linking agents. Furthermore, OGN-7 exhibits increased stiffness (γ = 79.4–316.3%), reduced gelation time (543 ± 5 to 475 ± 5 s), improved remendability of the hydrogel, and excellent biocompatibility. Notably, OGN-7 achieves full fusion within 1 h of incubation and maintains structural integrity under external stress, effectively overcoming the inherent mechanical weaknesses of natural polymer-based dressings and enhancing biofunctionality. The therapeutic efficacy of OGN-7 was validated through a full-thickness in vivo wound healing analysis, which demonstrated that OGN-7 significantly accelerates wound closure compared to alginate-based dressings and control groups. Histological analysis further revealed that re-epithelialization and collagen deposition were markedly enhanced in the regenerating skin of the OGN-7 group, confirming the superior therapeutic performance of OGN-7. In summary, OGN-7 optimized the synergistic effects of natural polymers, which enhances their collective functionality as a wound dressing and expands their utility across diverse biomedical applications.
研究领域:
生物医学工程
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材料科学
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组织工程
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伤口愈合
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产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2025
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IF 19
Guifen Sun,Zhendong Sun,Lulu Liu,Peng Wang,Zhengyan Zhang,Zhuo Li,Chuizhou Meng,Shijie Guo
The conformal integration of flexible electronic devices on curved surfaces of target objects remains challenging, particularly for soft tissues with arbitrary and changeable shapes. Herein, transparent conductive hydrogels are developed for visible conformal shape-adaptive tissue-adherent monitoring, in which the water-responsive contractility, repairability, and biocompatibility are simultaneously achieved. The hydrogel is designed with poly (ethylene glycol) (PEG)-α-cyclodextrin (α-CD)/polyethylene oxide (PEO) and polyvinyl alcohol (PVA) double-crosslinking network, in which water as a mild stimulus can disrupt the directional arrangement of crystalline and molecular chains in PEO to trigger efficient contraction, whereas the bonding between α-CD and PVA ensures sufficient in-water mechanical repeatability. Besides, a binary solvent of glycerol and water is developed to effectively repair the dehydrated hydrogel after long-term use with full recovery. Moreover, excellent biocompatibility is verified by in vitro cytotoxicity test and in vivo subcutaneous implantation experiment. The conductive hydrogel could be adhesively wrapped on soft epidermis skins and internal organs of the heart and tendons in a conformal shape-adaptive way for physiological and motion signal monitoring with visual observation of the covered tissue health status. This multifunctional hydrogel provides an innovative paradigm for developing next-generation intelligent bioelectronic devices towards broad applications in health management, clinical diagnosis and tissue engineering.
研究领域:
生物医学工程
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柔性电子学
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智能材料
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可穿戴设备
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组织工程
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生物电子学
✓ 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）