APPLIED SURFACE SCIENCE
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2024
·
IF 6.3
Yifei Zhang,Shuxin Xu,Jiarui Liu,Kaiyuan Zhang,Yu Guan,Shaoxiang Li
Developing high-performance polymer composites with self-healing and recyclable performance is crucial for long-term durability of the devices. This paper presents a novel method by incorporating carbon quantum dots (CQDs) into the chain extension reaction of polymers to construct self-healing polyurethane-urea (PUU) with excellent integrated mechanical and multi-recyclable properties. By the introduction of the CQDs with surface containing ample amide, carboxyl, and hydroxyl groups, the cross-linking networks are formed, and simultaneously, abundant H-bonds at the interface between CQDs nanospheres and PUU matrix provide strong interfacial interactions, which endows material reinforcement and self-healing effect. The addition of a very low amount of CQDs (0.15 wt%) can significantly improves the mechanical performance, especially the tensile stress and toughness, which increased about 74.4 % (35.2 MPa to 61.4 MPa) and 115.2 % (34.8 MJ·m −3 to 74.9 MJ·m −3 ), respectively. Besides, unlike other nanofillers, the addition of CQDs (more than 1 wt%) enables the PUU with excellent self-healing and recycling properties, and for 3 wt% addition, the room temperature self-healing efficiency can even achieve 97.0 % for 24 h without external intervention. Furthermore, the addition of the CQDs can also significantly the damping effect of the polymers. It is highly anticipated that the research will provide a facile method to construct high performance polymer materials.
研究领域:
材料科学
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高分子化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2014
·Vol. 2
·期 48
·20642-20649
·
IF 0
Jinhui Li,Guoping Zhang,Libo Deng,Songfang Zhao,Yongju Gao,Kun Jiang,Rong Sun,Chingping Wong
Covalently bonded graphene oxide/polyurethane (GO/PU) composites with significant reinforcement and thermally healable properties were developed via in situ polymerization based on Diels–Alder (DA) chemistry. The PU prepolymer was prepared with GO, 4,4-diphenylmethane diisocyanate, and poly(tetramethylene glycol) and blocked by using furfuryl alcohol firstly. Then the prepolymer was cross-linked by using bifunctional maleimide via DA chemistry. SEM shows that the GO was dispersed uniformly in the PU matrix. The DA and retro-DA reactions were characterized by Fourier transform infrared spectroscopy and differential scanning calorimetry separately. Tensile tests showed that with the incorporation of 0.1 wt% of GO, the tensile modulus of GO/PU composites increased from 9.80 MPa to 21.95 MPa, and the tensile strength and elongation at break of the GO/PU composites increased by more than 367% and 210%, respectively. Furthermore, the composites had thermally healable ability which was inspected by using an atomic force microscope and the strain–stress test. The healing efficiency of 78% on average was achieved which was determined by the recovery of breaking stress and a healing mechanism was tentatively proposed. Therefore, the covalently bonded self-healing GO/PU composites could be used as smart materials and structural materials.
研究领域:
材料科学
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高分子化学
✓ 已验证
产品关联
DOI
POLYMER COMPOSITES
·
2025
·
IF 4.7
Si Zhang,Chuanbo An,Xue Jiang,Xu Li,Zifan Wang,Nuoyi Wu,Xiaoxue Wang,Yun Chen
The resulting composites exhibit remarkable self-healing properties and enhanced recyclability by incorporating dynamic, reversible polyimine bonds into the epoxy matrix. Subsequently, glass fibers (GF) were modified using 3-aminopropyltrimethoxysilane (APTMS) to improve interfacial adhesion with the epoxy/polyimine matrix. Scanning electron microscopy (SEM) analysis revealed that the modified GFs significantly contribute to mechanical reinforcement through crack bridging, stress transfer, and energy dissipation. Experimental results showed that the addition of APTMS-modified glass fibers (AGF) improved the tensile strength and modulus of the AGF/EP/PI composites. When the content of AGF is 10%, the tensile strength and modulus of the composite reach 63.3 and 301 MPa, respectively, an increase of 27% and 25% compared to the EP/PI matrix. The introduction of AGF also significantly enhances the impact resistance, with the impact strength of the composite containing 5% AGF increased by 43% compared to the matrix. In terms of cycling performance, the EP/PI matrix material demonstrates excellent recyclability. After multiple cycling tests, the overall performance of the AGF/EP/PI composite remains high. It results in excellent cycling performance, providing new design ideas for the development of high-performance, recyclable pressure shell composites.
研究领域:
材料科学
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复合材料工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Hao Li,Xian-Ze Meng,Hao-Jie Yan,Run-Chao Zheng,Hui-Song Hu,Bing Lei,Qing-Hao Zhang,Lian-Kui Wu,Fa-He Cao
Corrosion activities and related accidents are significant issues for marine facilities, leading to considerable economic losses. Waterborne epoxy (EP) coating has been seen as one of the optimal options for corrosion protection due to its stable properties and eco-friendliness (0 g/L volatile organic compounds). Nevertheless, several intrinsic deficiencies require improvement, such as fragile mechanical properties and defects (macro and micro), resulting in the continuous deterioration of comprehensive coating performances. In this work, a novel nanocomposite coating with mechanical enhancement, intelligent self-reporting, and active protection is fabricated by integrating the functionalized and compatible graphene oxide/cerium based metal-organic framework multiscale structure (GO-CeMOF-P/M). Notably, the homogenous dispersion of GO-CeMOF-P/M and its chemical interaction with the polymer matrix effectively reduces the defects resulting from solution volatilizing and enhances the compactness, which boosts the tensile strength (32.1 MPa/8.5%) and dry adhesion force (5.8 MPa) of the coating. Additionally, the controllable responsiveness and release of multiscale nanocomposite within external environments endow intelligent active protection and self-reporting characteristics for the GO-CeMOF-P/M-EP coating, making it especially suitable for a variety of practical marine applications. Furthermore, following immersion of 80 d in the aggressive environment, Z f =0.01 Hz value of GO-CeMOF-P/M-EP coating is 1.2 × 10 10 Ω·cm 2 , which is 164.4 times larger than that of EP coating (7.3 × 10 7 Ω·cm 2 ), demonstrating remarkably strengthened anti-corrosion ability. Consequently, by offering an intriguing design strategy, the current work anticipates addressing the inherent deficiencies of EP coating and facilitating its practicality and feasibility in real sea environments.
研究领域:
材料科学
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海洋工程
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腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
Virtual and Physical Prototyping
·
2023
·
IF 10.6
Pei Feng,Saipu Shen,Liuyimei Yang,Ye Kong,Sheng Yang,Cijun Shuai
Graphene oxide (GO) and molybdenum disulphide (MoS2), have drawn more and more attention as reinforcement in polymer. However, their large specific surface area and strong van der Waals forces result in serious aggregations in polymer matrix, which restrains the reinforcement effect. In this study, MoS2 nanosheets were in situ synthesised vertically and uniformly on the surface of GO nanosheets with the help of a hexadecyl trimethyl ammonium bromide (CTAB) assisted hydrothermal process to facilitate their dispersion in polylactic acid (PLLA) scaffold manufactured via selective laser sintering (SLS). The experimental results revealed that the 1.5 wt% GO/MoS2 nanocomposite exhibited better dispersion state compared with the 1.5 wt% GO and 1.5 wt% MoS2 in PLLA matrix. Therefore, the PLLA scaffold loading 1.5 wt% GO/MoS2 presented 10.2 and 1461 MPa of tensile strength and modulus with enhancement of 61% and 58%, respectively, compared with the pure PLLA scaffold. The reinforcement mechanisms mainly included crack deflection, crack bridging, crack pinning and pulling out of GO/MoS2. What’s more, the GO/MoS2-PLLA scaffold possessed benign cytocompatibility for cell behaviour, suggesting hopeful applications in bone defect repair.
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
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Yue Zhao,Da-Peng Wang,Guang-Long Zhang,Jin-Wei Zhang,Ji-Yong Zheng,Cun-Guo Lin
In this work, the carbon-based 2D-3D composite nanocontainers endowing coatings with both active and passive protection properties were constructed by the sp 2 /sp 3 hybridized carbon as a versatile strategy. The classic graphene oxide (GO, sp 2 C) and Covalent Organic Framework-300 (COF-300, sp 3 C) were chosen as examples and benzotriazole (BTA) as the inhibitor to fabricate the GO/COF-300@BTA nanocontainer. The composite nanocontainers embedded in polyvinyl butyral (PVB) coatings were applied on cupper substrates to get mechanical enhancement, active and passive corrosion protection performance. The tensile strength of GO/COF-300/PVB (12.38 Mpa) was two times higher than that pure PVB (5.96 MPa). The active protection performance was ensured by the corrosion inhibitors encapsulated in the 3D porous carbon skeleton. The passive protection performance was endowed by the maze effect of the 2D carbon-based nanosheets. The |Z| 0.01 Hz of Cu/(GO/COF-300@BTA)/PVB was higher than 10 9 Ω·cm 2 , which was two magnitudes larger than that of PVB coating, demonstrating the anti-corrosion properties. In addition, the quantum chemical calculation and molecular dynamics simulation results elaborated the adsorption states of BTA on copper substrate and the compatibility between the molecular chains of the PVB and the GO/COF-300 nanocontainer.
研究领域:
材料科学
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腐蚀与防护
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表面工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 55
·34461-34465
·
IF 3.108
Tingting Zheng,Ang Li,Zhanying Li,Wenbin Hu,Lin Shao,Lingbin Lu,Yang Cao,Yongjun Chen
As an environmentally friendly aerogel with outstanding performances, the improvement of mechanical properties is urgently required for cellulose aerogel development. In this study, a cellulose aerogel with good mechanical properties was successfully fabricated using nanocrystalline cellulose (NCC) as reinforcer. Characterization results demonstrated that NCC was embedded well into the cellulose aerogel. Tests and evaluation showed that the compressive modulus of the NCC reinforced cellulose aerogel was significantly improved, about 6 times higher than that of the pure cellulose aerogel. Furthermore, after modification with trimethylchlorosilane via a cold plasma treatment, the NCC reinforced aerogel became hydrophobic but its oleophilic property remained. This aerogel showed good adsorption capacity, reached saturation rapidly and possessed good reusability. Reinforced mechanical properties with NCC make this cellulose aerogel a very promising material for highly efficient separation and extraction of organic pollutants and oils from water.
研究领域:
材料科学
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高分子化学
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环境功能材料
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纳米复合材料
·
绿色材料
✓ 已验证
DOI
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Xueliang Feng,Jie-Wei Wong,Mingjin Yang,Qing Zhang,Xiaoxue Liao,Daquan Kek,Zhenzhong Liu,Jize Liu,Chunxin Ma,Qingrong Wei,Tuck-Whye Wong
Intelligent hydrogels can provide various biomimetic actuations in response to external stimuli, but it is still difficult to program their actuating complexity, which severely limits their further applications. Herein, a stimuli-responsive actuating bi-hydrogel with a directional negative layer and a homogeneous positive layer has been explored. The stretched natural rubber latex–polyacrylamide (NRL-PAAm) hydrogel layer can partly maintain this directional structure, which can further integrate with the photothermal-responsive graphene-poly(N-isopropylacrylamide) (G-PNIPAM) hydrogel layer to obtain the anisotropic bilayer hydrogel. First of all, different from bilayer PNIPAM-based hydrogels, which commonly only achieve two-dimensional (2D) complex actuations, this bi-hydrogel can achieve various not only 2D but also three-dimensional (3D) complex programmable actuations, especially because of its double anisotropy of both bilayer and directional structures. Furthermore, this bi-hydrogel can own a rapid actuating speed reaching 27.7°/s of bending and 18.0°/s of folding in response to non-contact near-infrared (NIR) irradiation, mainly owing to the high photothermal conversion efficiency of composited graphene. Last but not least, thanks to the highly enhanced mechanical performance of the directional NRL-PAAm hydrogel layer, this bi-hydrogel is robust, reaching 4.0 times the tensile strength of pure G-PNIPAM, which owns a relatively powerful force to lift more than 50 times its self-weight. This work provides a promising intelligent hydrogel integrating programmable 2D/3D complex actuation, rapid actuating speed, and powerful force, which will also inspire exploration of other soft intelligent materials.
研究领域:
高分子材料学
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生物医学工程
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软体机器人
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智能响应材料
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组织工程
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纳米复合材料
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仿生驱动器
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2019
·Vol. 25
·期 50
·11715-11724
·
IF 5.16
Bo Zhang,Jinhui Li,Feng Liu,Tao Wang,Ying Wang,Rui Xuan,Guoping Zhang,Rong Sun,Ching-Ping Wong
The practical application of advanced personalized electronics is inseparable from flexible, durable, and even self-healable energy storage devices. However, the mechanical and self-healing performance of supercapacitors is still limited at present. Herein, highly transparent, stretchable, and self-healable poly(2-acrylamido-2-methyl-1-propanesulfonic acid) (PAMPSA)/poly(vinyl alcohol) (PVA)/LiCl polyelectrolytes were facilely prepared by one-step radical polymerization. The cooperation of PAMPSA and PVA significantly increased the mechanical and self-healing capacity of the polyelectrolyte, which exhibited superior stretchability of 938 %, stress of 112.68 kPa, good electrical performance (ionic conductivity up to 20.6 mS cm −1 ), and high healing efficiency of 92.68 % after 24 h. After assembly with polypyrrole-coated single-walled carbon nanotubes, the resulting as-prepared supercapacitor had excellent electrochemical properties with high areal capacitance of 297 mF cm −2 at 0.5 mA cm −2 and good rate capability (218 mF cm −2 at 5 mA cm −2 ). Besides, after cutting in two the supercapacitor recovered 99.2 % of its original specific capacitance after healing for 24 h at room temperature. The results also showed negligible change in the interior contact resistance of the supercapacitor after ten cutting/healing cycles. The present work provides a possible solution for the development of smart and durable energy storage devices with low cost for next-generation intelligent electronics. Graphical Back together again : A PAMPSA/PVA/LiCl polyelectrolyte with excellent mechanical strength, high ionic conductivity, and superior self-healing property was synthesized by one-step radical polymerization. Assembly with polypyrrole-coated single-walled carbon nanotubes gave a self-healable supercapacitor that recovered 99.2 % of its original specific capacitance after cutting in two and healing for 24 h at room temperature (see figure). PAMPSA: poly(2-acrylamido-2-methyl-1-propanesulfonic acid), PVA: poly(vinyl alcohol).
研究领域:
材料科学
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高分子化学
·
能源存储
·
柔性电子学
·
功能材料
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2017
·
IF 3.671
Wenhang Wang,Xiaowei Zhang,Anguo Teng,Anjun Liu
Given a variety of distinguished aspect ratio-related characteristics of nanofiber cellulose (NFC), the impact of NFC on gelatin hydrogel performance involving strength, rheology, microstructure was investigated, focusing on concentration percolation mechanism for it. The inner topography displayed a compact three-dimensional network structure in the NFC-added gelatin gel, however, an NFC amount of 7.5 g kg −1 caused more inhomogeneous aggregation. Texture profile analysis showed that the addition of NFC increased the hardness but reduced the elasticity of gelatin gel at 10 °C, depending on NFC concentration. For static rheology, adding NFC transformed gelatin solution from the Newtonian action into pseudoplastic behavior at 60 °C, with a marked increase of viscosity. Furthermore, NFC improved the temperature of sol-gel transition of gelatin, even no obvious transformation as ≥5 g kg −1 NFC used. NFC reinforcement provides the potential to use as texture modifier along with gelatin in food field.
研究领域:
材料科学
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食品科学
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Jinghao Cao,Jiarui Liu,Wenxiang Wang,Liangjiu Bai,Hou Chen,Kai Wei,Lixia Yang
This study reports a frost-resilient nanocomposite hydrogel engineered for flexible electronics operating under cryogenic conditions. The hydrogel integrates a polyvinyl alcohol–guar gum (PVA-GG) dual-network matrix with cellulose nanocrystals (CNCs) grafted with glycosylated borate ammonium phytate (GBAP) and L-proline (L-Pro), forming hierarchical hybrid reinforcements through molecular interface engineering. Phytic acid (PA) enables multivalent coordination crosslinking, while L-Pro provides cryoprotection and maintains ductility at low temperatures. The resulting hydrogel exhibits excellent stability at −20 °C, including a tensile modulus of 2.11 MPa and 92.94 % self-healing efficiency. As a flexible sensor, it delivers a gauge factor of 2.72 and a rapid response time of 270 ms at −20 °C, enabling reliable monitoring of human motion. This work presents a scalable strategy for designing hydrogels with synergistic mechanical, self-healing, and anti-freezing capabilities, advancing flexible electronics for extreme-environment, wearable, and biomedical applications.
研究领域:
生物材料
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高分子科学
·
柔性电子
·
生物医学工程
·
纳米复合材料
·
极端环境电子学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2022
·Vol. 10
·期 22
·4142-4152
·
IF 7.571
Kun Fang,Qinwei Gu,Mingzhu Zeng,Zhimao Huang,Haofeng Qiu,Jiru Miao,Yue Fang,Yinyu Zhao,Ying Xiao,Ting Xu,Robert Petrovich Golodok,Vadim Victorovich Savich,Alexander Phyodorovich Ilyushchenko,Fanrong Ai,Donglei Liu,Rong Wang
Diabetic wounds remain one of the most prevalent hard-to-heal wounds in the clinic. The causative factors impeding the wound healing process include not only the elevated oxidative stress and bacterial infections but also the high and repetitive plantar stress (including compressive pressure and shear stress). Conventional hydrogel dressings are mechanically weak and fragile, limiting their applications in the high stress-loading conditions of diabetic foot ulcers. As such, mechanically tough hydrogel dressings with appropriate bioactivities are highly desirable for diabetic wound treatment. In this study, a mechanically reinforced hydrogel with multiple biofunctionalities was developed via a facile and straightforward strategy of incorporation of tannic acid (TA) in zwitterionic poly(sulfobetaine methacrylate) (polySBMA) hydrogel. The polySBMA hydrogel reinforced by TA showed excellent mechanical property, with the tensile stress and compressive stress up to 93.7 kPa and 18.4 MPa, respectively, and it could resist cyclic compressive stress at ∼200 kPa (maximum in-shoe plantar pressure) for up to 3500 cycles. The TA-reinforced zwitterionic hydrogel exhibited strong adhesion to skin tissue (20.2 kPa), which was expected to reduce the shear stress on the foot. The plantar pressure on the foot was significantly reduced by the application of the resilient hydrogel. Attributed to the antioxidant and antibacterial properties of TA, the hydrogel showed rapid radical scavenging capability and strong bactericidal efficacy against Gram-positive and Gram-negative bacteria. In vitro and in vivo studies confirmed that the hydrogel has good cytocompatibility and negligible skin irritation, and promoted healing of diabetic wounds in mice. Such tough and effective hydrogel with a straightforward preparation strategy holds great promise as wound dressings for diabetic wound treatment.
研究领域:
材料科学
·
生物医学工程
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伤口愈合
·
药剂学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）