INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Zhen Zhang,Shanlin Cui,Ruixue Ma,Qiuyang Ye,Jiahui Sun,Yaming Wang,Chuntai Liu,Zhen Wang
High-toughness biodegradable poly(lactic acid) (PLA) has always been intensively pursued on the way of replacing traditional petroleum-based plastics. Regulating microstructures to achieve self-toughening holds great promise due to avoidance of incorporating other heterogeneous components. Herein, we propose a straightforward and effective way to tailor microstructures and properties of PLA through melt-stretching and quenching of slightly crosslinked samples. The melt stretching drives chains orientation and crystallization at high temperature, while the quenching followed can freeze the crystallization process to any stage. For the first time, we prepare a type of transparent and low-crystalline PLA filled with rod-like β-form shish, which displays an outstanding tensile toughness, almost 17 times that of the conventional technique-processed one. This mechanical superiority is enabled by an integration of high ductility due to oriented chain network, and high tensile stress endowed by nanofibrous filler's role of β-form shish. Furthermore, the mechanically toughened PLA is demonstrated to generate the richest micro-cracks and shear bands under loading, which can effectively dissipate the deformational energy and underlie the high toughness. This work opens a new prospect for the bottom-up design of high-performance bio-based PLA materials that are tough, ductile and transparent by precise microstructural regulation through scalable melt processing route.
研究领域:
材料科学
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生物降解材料
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高分子物理
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产品关联
DOI
PubMed
高影响因子
POLYMER
·
2022
·
IF 4.432
Yiliang Gao,Yumin Wu,Jingming Zhao,Ying Ma,Yuetao Liu,Chuanhui Gao
Focusing on the self-assembly strategy of polymer chain structure, designing and synthesizing intelligent, tough and healable polymer materials is an effective way to meet the high-end applications of materials. Inspired by spider silk, we designed a preparation scheme for a repairable polyurethane-polyurea elastomer (IPAD-6.4) with an unprecedented mechanical toughness of 625.10 MJ/m 3 and elongation at break of 3756.56%. After repeated cyclic stretching, the elastic body can recover 92.85% of the dissipated energy in only 2 h. These results are achieved by the hierarchical hydrogen bonds formed by different groups and the reasonable covalent cross-linking network. Additionally, the elastomer shows excellent healing ability (repair efficiency ∼102.77%). A flexible conductive composite film is prepared by simple physical assembly. The sensor can not only accurately detect the bending motion of human joints, but also has excellent antibacterial properties, which gives the material application potential in medical and engineering fields.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 48
·19412-19423
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IF 5.7
Junlong Wang,Xiaosheng Huo,Wenjun Huang,Junbin Xu,Pengcheng Yu,Xiangqian Zhang,Zhenhua Cong,Jian Niu
Developing a simple method to prepare conductive hydrogels with both mechanical toughness and high electrical conductivity remains a significant challenge. Here, a laminated conductive hydrogel was engineered, featuring a unique composition with EGaIn micro/nanodroplets concentrated on one side and polyvinyl alcohol (PVA) hydrogel on the other. To achieve high electrical conductivity in the liquid metal (LM) conductive layer, while preventing the aggregation of liquid metal particles (LMPs) within the PVA hydrogel, PEDOT:PSS nanoparticles with an electrical potential opposite to that of the LMPs were introduced. Under the combined effects of gravitational settling and electrostatic-assisted settling, the LM conductive layer forms a network of large liquid metal particles as the primary framework, with smaller particles serving as network interconnectors. This configuration offers excellent electrical conductivity (1.67 × 105 S m−1) and maintains stable resistance under 617% tensile strain. Due to multiple cross-linking mechanisms, the prepared conductive hydrogel exhibits high Young's modulus (∼178.14 MPa), stretchability (∼818%), and toughness (∼185.9 MJ m−3), outperforming most existing tough gels, biological tissues, and natural rubber. The conductive hydrogel enables the creation of ultra-thin capacitive sensors with high sensitivity (0.05 g) and rapid response (20 ms). These devices enable accurate monitoring of human motions and bioelectrical signals, highlighting their immense potential in the fields of soft electronics and wearable technology.
研究领域:
材料科学
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生物医学工程
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软体电子学
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
You Wu,Zhonglei Li,Heyu Wang,Zhong Zheng,Boxue Du
As an environmentally friendly polymer material, isotactic polypropylene (pp), possesses excellent dielectric properties while it can be recycled, so it is regarded as having promising application prospects in the field of high voltage power cable insulation. However, the increasing operating voltage rating also puts higher demands on its insulation reliability. In this study, an intrinsic modulation method for pp insulation based on mesoscopic structure modulation by crystal phase transformation is proposed, which not only effectively improved the dielectric properties but also enhanced the mechanical toughness synergistically. The transformation of the crystal phase from the α-crystal to β-crystal within the PP/β-NA samples was successfully achieved by the solution blending method. The crystallization efficiency is greatly promoted, and the crystal structure is further improved at the same time. As the proportion of β-crystal gradually increases, the elongation at break could be raised to 451% at maximum. The difference in dielectric parameters between the crystal and amorphous regions is caused by the variation in the molecular chain density and arrangement, which is also the main reason for further triggering the high-intensity partial discharges and large-area electrical tree degradation in the amorphous region between the spherocrystal boundary at the mesoscopic scale. Compared with the premodification, the introduction of β-crystal effectively alleviated the problem of electric field distortion. Among them, the modified PP-β-0.2 sample had 16.8 kV/mm lower maximum electric field, 2258 fewer total partial discharges, 420 μm2 less electrical tree cumulative damage area, and 28% higher breakdown strength. Accordingly, it also has promising applications in the manufacturing of high-voltage power cable insulation.
研究领域:
材料科学
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电气工程
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高分子化学
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产品关联
DOI
高影响因子
Nano Energy
·
2024
·
IF 16.8
Qianqian Jia,Shijian Xu,Chunpeng Wang,Daihui Zhang,Kai Zhang,Chuanwei Lu,Qiang Yong,Jifu Wang,Fuxiang Chu
Natural wood with the merits of hierarchical structure and renewable has gained increasing attentions in sustainable electrical device. However, the development of functionalized wood integrating excellent mechanical robustness and conductivity for electronics remains ongoing challenge. Herein, a novel strategy of polymerizable deep eutectic solvents (PDES) treated modified-wood was developed for the preparation of multi-functionalized wood for high-performance self-powered sensors. In this strategy, the methacrylic anhydride-modified wood simultaneously containing methyl groups and acrylate groups was first prepared, and then employed to react with PDES to construct the covalent-noncovalent dual crosslinked functionalized wood (FW). The in-situ polymerization of PDES with modified-wood not only achieved the excellent mechanical toughness (2.37 MJ/m 3 ), optical transmittance (86 %) and conductivity (34.48 mS/m) but also endowed the FW with outstanding antibacterial performance. Given these features, the FW was applied as electrode materials for assembling flexible and high-performance wood-based TENG (FW-TENG). More impressively, the introduction of the electron-donating group (-CH 3 ) improved the polarity of the FW, which significantly increased the transferred charge density of FW-TENG about 2.91 times. And the FW-TENG showed the promising applications in human motions monitoring and information encrypting. This work paved a new strategy for developing the multi-functionalized wood-based materials for self-powered electronics.
研究领域:
材料科学
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电子工程
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可持续技术
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Chuanyong Yan,Chunyin Lu,Shikun Wen,Mingbo Yang,Mingjun Bai,Siqi Chen
Hydrogels are widely used across various fields, creating a demand for materials capable of withstanding freezing conditions. Most existing antifreezing hydrogels rely on small-molecule additives or are organogels, which frequently encounter environmental concerns due to potential toxicity and exhibit poor long-term stability in harsh conditions. In this study, we propose a hybridized hydrogen bonding strategy to develop antifreezing hydrogels without the need for small-molecule additives. The freezing resistance is achieved through interactions between the hydrogel’s polar functional groups (the −COOH group of poly(acrylic acid), the −CO– group of polyvinylpyrrolidone, and the −OH group of phytic acid) and water molecules, which modify the distribution of hydrogen bonds within the system. These hydrogels demonstrate excellent mechanical resilience (92%) and conductivity, both of which are maintained at subzero temperatures. Additionally, flexible sensors made from these hydrogels exhibit reliable signal stability in low-temperature environments. This work presents an effective strategy for improving the freezing resistance of hydrogels, advancing our understanding of antifreezing mechanisms, and providing practical insights for future applications, particularly in wearable sensor technologies.
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
MACROMOLECULAR MATERIALS AND ENGINEERING
·
2022
·Vol. 307
·期 7
·2100981
·
IF 4.402
Liyun Fu,Xing liu,Yubin Zhou,Minghong Wu,Shumei Liu,Jianqing Zhao,Yueqi Mo
A bio-based phosphorus/nitrogen-containing furan derivative, 6,6′′,6′′′-((((1,3,5-triazine-2,4,6-triyl) tris(oxy))tris(benzene-4,1-diyl))tris(((furan-2-ylmethyl) amino)methylene)) tris(dibenzo[c,e][1,2]oxaphosphinine 6-oxide) (TFAD) is successfully synthesized and characterized by Fourier transform infrared spectroscopy and nuclear magnetic resonance spectroscopy. The introduction of TFAD clearly lowers the activation energy for diglycidyl ether of a bisphenol A (DGEBA)/4,4′-diaminodiphenyl methane (DDM) system. The DGEBA/DDM/ TFAD thermoset achieves UL-94 V-0 rating and possesses a limiting oxygen index (LOI) of 30.1% as the content of phosphorus is up to 0.41 wt.%. Further, compared with unmodified epoxy thermoset, its peak heat release rate and total heat release experience 42.0% and 14.8% decrement, respectively. The flame-retardant mechanism analysis confirms that TFAD exerts a fire-retardant effect in both gaseous and condensed phases. Meanwhile, the impact strength of the flame-retardant thermoset is enhanced by 35.6%, from 19.5 kJ m –2 for EP-0 to 26.5 kJ m –2 . This work provides a novel strategy to construct superior flame-retarded epoxy thermosets with admirable impact performance.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
Advanced Energy Materials
·
2025
·
IF 26
Jinman Zhou,Zixuan Ren,Xuechun Cui,Xianyuan Liu,Xianyong Lu
The burgeoning field of moisture-electric generators (MEGs) for wearable electronics has garnered significant interest due to their capability to harness energy from atmospheric moisture. Nevertheless, achieving an optimal balance between mechanical resilience and energy generation efficiency in MEGs materials remains a substantial challenge. Herein, the study reports a highly resilient and flexible nanocomposite film comprising activated aramid nanofibers and sodium alginate (aASA), designed via biomimetic methodologies and advanced interfacial activation techniques to enhance power generation efficiency. The aASA film exhibits exceptional mechanical properties, including a toughness of 30.5 MJ m −3 , and exhibits superior impact resistance compared to conventional aramid nanofiber films. The asymmetric sandwich-structured MEG fabricated using the aASA film (termed ASMEG) achieves sustained voltage and current output of 1.25 V and 2.52 µA cm −2 over 100 h with minimal degradation at 80% RH, showcasing outstanding performance among existing MEGs. Furthermore, the ASMEG device effectively demonstrates practical utility in self-powered sensing applications, providing structural protection alongside real-time self-monitoring capabilities during dynamic impact scenarios. This work presents an innovative strategy for designing high-performance moisture-electric generation materials specifically tailored for wearable electronics.
研究领域:
材料科学
·
能源技术
·
生物仿生学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2025
·
IF 12.1
Jialin Wang,Kai Zhao,Yanbo Zhao,Changqing Ye
Eutectogels are recently emerged as promising alternatives to hydrogels owing to their good environmental stability derived from deep eutectic solvents (DES). However, construction of competent eutectogels with both high conductivity and mechanical toughness is still difficult to achieve yet highly demanded. In this work, new LMNP-PEDOT-CMC-AA (LPCA) eutectogels are prepared using acrylic acid (AA) and carboxymethylcellulose sodium (CMC) as polymeric networks, liquid metal nanoparticle-poly(3,4-ethylenedioxythiophene) (LMNP-PEDOT) are added as multifunctional soft fillers. Benefiting from the compliant and conductive LMNP-PEDOT, the LPCA eutectogels exhibit high conductivity (0.224 S m −1 ), electromechanical coupling, stretchability (4228%) and exceptional toughness (7.278 MJ m −3 ). Additionally, abundant hydrogen interactions and available functional groups within eutectogels endow them excellent self-healing and adhesion on different substrates. Moreover, the LPCA eutectogels demonstrate superior environmental tolerance including anti-freezing and anti-drying, thus allowing for long-term functional reliability. These appealing characteristics enable accurate and stable tracking of human motions, as well as information delivery based on Morse code. This study opens the possibility of designing conductive and tough eutectogels enabled by LM composites.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 19
·8287-8297
·
IF 3.5
Liu Yang,Jiang Lu,Jiang Ruonan,Liu Huanhuan
Researchers are showing a great deal of interest in hydrogels due to the presence of high-water content, self-healing variants. Despite this, research into the development of smart hydrogels that have the combination of toughness, self-healing, and responsiveness to external stimuli is still lacking. Here, tough, and intelligent nanocomposite (NC) hydrogels have been developed by utilizing modified nano-crosslinker by means of gold-selenium (Au-Se) coordination interaction. The NC hydrogels demonstrate remarkable elasticity and strength, even when exposed to notches. With the optimal formulation, the nanocomposite hydrogel can achieve a maximum elongation of 1970%, a maximum fracture stress of 2.48 MPa, and a toughness of up to 9.95 MJ/m 3 , thanks to the dynamic gold crosslinks with improved branching. The presence of this structural attributes facilitates efficient energy dissipation within the hydrogel system. Combining Au-Se interaction as a healing element and the remarkable optothermal effect of nanoparticles, NC hydrogels can be quickly self-healed in near-infrared light exposure of 2 min, achieving a self-healing efficiency of 91%. Additionally, the hydrogels demonstrate repair potential when exposed to microwave irradiation, acid solution, and ultrasound stimulus. Moreover, a multi-responsive hydrogel composed of photothermal gold nanostructures can serve as a light-controlled drug carrier, which has smart drug release ability under external light stimulation. The advantageous properties of hydrogel make it a great option for biomedical and engineering fields.
研究领域:
材料科学
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生物医学工程
·
化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Haiyang Liao,Fenglin Zhou,Zhanzhan Zhang,Jia Yang
With overwhelming development of electronic technology, flexible electronic devices are spring up in modern today. For fulfilling the trendy and artistic designing of electronic devices, mechanical toughness and self-healable all-solid-state supercapacitors play an essential role of modern electronics. However, the sate-of-the-art polyvinyl alcohol-based electrolyte for all-solid-state supercapacitors neither has tough physical performance nor self-healing, which is hard to implant into special-shaper and repeated-deformation device for energy supplier. A novel electrolyte with mechanical robust and endowed self-healing is prepared by micelle co-polymerization of acrylic acid and octadecyl methacrylate in vinyl-treated sponge (S-PAA). The 3D interconnected skeleton of sponge serves as stress buffers to dissipate energy when physical impact (stretch and compress) is applied, solving the intrinsically poor mechanical performance and easy cracking under repeated-deformation drawbacks of state-of-the-art supercapacitors. The supercapacitor equipped with newly type of electrolyte can be worked under compressing, bending and stretching station. Moreover, the electrochemical performances have no evidence loss even using self-healed fragment electrolyte.
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
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Li Guo,Wen-Xia Li,Yin-Bo Liu,Hai-Xin Du,Fei-Peng Du,Sheng-Gao Wang,Zhe Chen,Xiao-Ping Zeng,Ping Fu
To overcome the dual limitations of conventional moisture electricity generation (MEG) materials, including poor mechanical properties and limited electrical output, we developed a novel ionogel via UV-initiated copolymerization of 1-butyl-3-vinylimidazolium bromide (BVIm-Br) and acrylic acid (AA). The BVIm-Br/AA copolymer network, reinforced by extensive hydrogen bonding, imparts excellent mechanical properties, achieving a tensile strength of 44.76 MPa and a strain of 375.01%, while maintaining stability under cyclic strains up to 400%. Integrated into MEG devices, the ionogel delivers remarkable moisture-driven electrical performance under relative humidity (RH) 100%, producing an open-circuit voltage (VOC) of 922 mV, a short-circuit current (ISC) density of 165 μA·cm–2, and power density of 15.67 μW·cm–2. This work breaks through the performance bottleneck of MEG material design and establishes a new paradigm for next-generation environmental energy harvesters, with promising applications in ambient energy conversion and wearable electronics.
研究领域:
材料科学
·
能源材料
·
高分子化学
·
环境功能材料
·
可穿戴电子
✓ 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）