ADVANCED MATERIALS
·
2020
·Vol. 32
·期 8
·1906994
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IF 27.398
Jianchun Song,Shuo Chen,Lijie Sun,Yifan Guo,Luzhi Zhang,Shuliang Wang,Huixia Xuan,Qingbao Guan,Zhengwei You
Stretchable conductive fibers are key elements for next-generation flexible electronics. Most existing conductive fibers are electron-based, opaque, relatively rigid, and show a significant increase in resistance during stretching. Accordingly, soft, stretchable, and transparent ion-conductive hydrogel fibers have attracted significant attention. However, hydrogel fibers are difficult to manufacture and easy to dry and freeze, which significantly hinders their wide range of applications. Herein, organohydrogel fibers are designed to address these challenges. First, a newly designed hybrid crosslinking strategy continuously wet-spins hydrogel fibers, which are transformed into organohydrogel fibers by simple solvent replacement. The organohydrogel fibers show excellent antifreezing (< -80 °C) capability, stability (>5 months), transparency, and stretchability. The predominantly covalently crosslinked network ensures the fibers have a high dynamic mechanical stability with negligible hysteresis and creep, from which previous conductive fibers usually suffer. Accordingly, strain sensors made from the organohydrogel fibers accurately capture high-frequency (4 Hz) and high-speed (24 cm s −1 ) motion and exhibit little drift for 1000 stretch–release cycles, and are powerful for detecting rapid cyclic motions such as engine valves and are difficult to reach by previously reported conductive fibers. The organohydrogel fibers also demonstrate potential as wearable anisotropic sensors, data gloves, soft electrodes, and optical fibers.
研究领域:
材料科学
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柔性电子
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生物医学工程
✓ 已验证
DOI
高影响因子
Polymers
·
2023
·Vol. 15
·期 19
·3983
·
IF 5
Jiayi Shen,Junfei Ou,Sheng Lei,Yating Hu,Fajun Wang,Xinzuo Fang,Changquan Li,Wen Li,Alidad Amirfazli
Slippery coatings, such as the slippery liquid-infused porous surface (SLIPS), have gained significant attention for their potential applications in anti-icing and anti-fouling. However, they lack durability when subjected to mechanical impact. In this study, we have developed a robust slippery coating by blending polyurethane acrylate (PUA) with methyltriethoxysilane (MTES) and perfluoropolyether (PFPE) in the solvent of butyl acetate. The resulting mixture is homogeneous and allows for uniform coating on various substrates using a drop coating process followed by drying at 160 °C for 3 h. The cured coating exhibits excellent water repellency (contact angle of ~108° and sliding angle of ~8°), high transparency (average visible transmittance of ~90%), exceptional adherence to the substrate (5B rating according to ASTMD 3359), and remarkable hardness (4H on the pencil hardness scale). Moreover, the coating is quite flexible and can be folded without affecting its wettability. The robustness of the coating is evident in its ability to maintain a sliding angle below 25° even when subjected to abrasion, water jetting, high temperature, and UV irradiation. Due to its excellent nonwetting properties, the coating can be employed in anti-icing, anti-graffiti, and anti-sticking applications. It effectively reduces ice adhesion on aluminum substrates from approximately 217 kPa to 12 kPa. Even after 20 cycles of icing and de-icing, there is only a slight increase in ice adhesion, stabilizing at 40 kPa. The coating can resist graffiti for up to 400 cycles of writing with an oily marker pen and erasing with a tissue. Additionally, the coating allows for easy removal of 3M tape thereon without leaving any residue.Keywords:solid slippery coating;durability;anti-freezing;anti-graffiti;anti-smudge
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 7
·1137
·
IF 5.719
Chubin He,Xiuru Xu,Yang Lin,Yang Cui,Zhengchun Peng
Conductive hydrogels are widely used in sports monitoring, healthcare, energy storage, and other fields, due to their excellent physical and chemical properties. However, synthesizing a hydrogel with synergistically good mechanical and electrical properties is still challenging. Current fabrication strategies are mainly focused on the polymerization of hydrogels with a single component, with less emphasis on combining and matching different conductive hydrogels. Inspired by the gradient modulus structures of the human skin, we propose a bilayer structure of conductive hydrogels, composed of a spray-coated poly(3,4-dihydrothieno-1,4-dioxin): poly(styrene sulfonate) (PEDOT:PSS) as the bonding interface, a relatively low modulus hydrogel on the top, and a relatively high modulus hydrogel on the bottom. The spray-coated PEDOT:PSS constructs an interlocking interface between the top and bottom hydrogels. Compared to the single layer counterparts, both the mechanical and electrical properties were significantly improved. The as-prepared hydrogel showed outstanding stretchability (1763.85 ± 161.66%), quite high toughness (9.27 ± 0.49 MJ/m3), good tensile strength (0.92 ± 0.08 MPa), and decent elastic modulus (69.16 ± 8.02 kPa). A stretchable strain sensor based on the proposed hydrogel shows good conductivity (1.76 S/m), high sensitivity (a maximum gauge factor of 18.14), and a wide response range (0–1869%). Benefitting from the modulus matching between the two layers of the hydrogels, the interfacial interlocking network, and the patch effect of the PEDOT:PSS, the strain sensor exhibits excellent interface robustness with stable performance (>12,500 cycles). These results indicate that the proposed bilayer conductive hydrogel is a promising material for stretchable electronics, soft robots, and next-generation wearables.Keywords:conductive hydrogels;bilayer structure;interface robustness;wearable sensors
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Shijia Tian,Xiaonan Wang,Wenjing Qin,Shougen Yin,Taixing Tan,Yuan Tian,Cheng Wang
The exploration of flexible electronic technology has been paid great attention recently, due to their promising applications such as health monitors and artificial electronic skins. To satisfy the requirement of practical applications, flexible and stretchable electrodes need to be further optimized in terms of mechanical robustness, sensing performance, and stability in extreme environments. Here, an ultra-robust and stretchable electrod is rationally designed and successfully fabricated via the synergistic combination of in situ growing silver nanoparticles (AgNPs)/acid-modified carbon nanotubes (ACNTs) conductive networks and superamphiphobic 1H, 1H, 2H, 2H-perfluorodecyltriethoxysilane modified carbon nanotubes-silica nanoparticles (FCNTs-SiO 2 ). The obtained electrode shows a skin-like Young's modulus (2.3 MPa), high tensile strength (21.7 MPa), and good gas permeability. Owing to the conductive paths of ACNTs-bridged AgNPs, the strain sensor delivers a wide detection range of 155 %, a high gauge factor (denoted as GF) value up to 6.6 × 10 4 and a fast response time of 62 ms. The re-entrant structure constructed by spraying FCNTs-SiO 2 along with chemcial composition endows the sensor with superamphiphobicity, which allows the sensor to fulfill its function under extreme environments (such as −60 ℃ to 60 ℃, corrosive liquids and non-polar liquids). The strain sensor can be used for monitoring high-frequency exercise and human health, indicating its potential application.
研究领域:
柔性电子
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材料科学
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可穿戴技术
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健康监测
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
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2021
·
IF 9.381
Jinping Ren,Furong Tao,Xifeng Lu,Hailong Zhang,Ligang Gai,Libin Liu,Haihui Jiang
Multicolored superhydrophobic coating with high durability has been receiving tremendous attention in decorative applications. Herein, a facile method to fabricate multicolored superhydrophobic coating with excellent robustness has been developed by using cellulose and chitosan. The multicolored coatings can be obtained through single dyeing or mixed dyeing based on three primary dyes. The coating can be applied on hard substrates (e.g. glass, aluminum sheet) and soft substrates (e.g. cotton fabric) by diverse methods including spraying, dip-coating and painting. The colorful coating firmly adheres to the substrates due to the multiple interactions (siloxane covalent bonds and hydrogen bonds). The colorful coating exhibits water-repellant behaviors and can withstand sandpaper abrasion, tape-peeling cycles, water impact, salt spray test and UV environments. Furthermore, the multicolored coating can be used as a new type of pigment for painting on different substrates and is expected to have a huge potential application in technological design or decoration.
研究领域:
材料科学
·
生物学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2022
·
IF 7.392
Xiannan Zhang,Zhenzhen Mo,Raul Arenal,Wenjiang Li,Cheng Wang
The mechanical robustness of superhydrophobic surface is essential for practical applications. In this work, multi-walled carbon nanotubes with copious hydroxyl groups (MWCNTs-OH) were firstly silanized, with the presence of a small amount of HCl aquesous solution as catalyst, by trimethoxymethylsiane (MTMS) in petroleum ether. Upon hydrolyzation and condensation, silica derived from MTMS could wrap the MWCNTs spirally like the vines wrapping the trees via forming Si O C bondings between the MWCNTs and silica. The resultant MWCNTs@MTMS composite exhibits superhydrophobic and superoleophilic properties. When added into one of commercial lacquers (LK-1014) as a filler, the mixture could be easily sprayed on various substrates with arbitrary dimensional size and shape. The optimized mass ratio of MWCNTs@MTMS to LK-1014 is about 1:20 for fabricating coating with both superior mechanical robustness and superhydrophobic and superoleophilic properties. The adhesions to some substrates and wear resistances were verified via the adhesive tape adhesion tests and sandpaper wear experiments. A copper mesh with sprayed coating was measured to have a water-resistance height of 14.6 cm, corresponding to an invasion pressure of 1430.8 Pa. Folding the sprayed copper meshes into boxes allows continuous separation of oil–water mixture with high separation efficiency (higher than 96 %), fairly large fluxes (higher than 120 kL·m −2 ·h −1 ) and application durability. Using filter paper with such coating for the separation of water-in-oil emulsions, an efficiency up to 99.9 % could be reached.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Advanced Intelligent Systems
·
2021
·Vol. 3
·期 9
·2100056
·
IF 0
Shengshun Duan,Binghao Wang,Yucheng Lin,Yinghui Li,Di Zhu,Jun Wu,Jun Xia,Wei Lei,Baoping Wang
Wearable sensors with water resistance and mechanical durability are of great value in dealing with long-term movement and remote control in harsh environments. However, achieving high sensitivity with long-term stability and real-time remote control in a watery environment is still a challenge. Herein, the waterproof wearable sensors with good mechanical robustness composed of laser-induced graphene and in situ-coated protective silicone layers are reported. By being integrated with high-capacitance ion-gel dielectrics, the conformal sensors can detect multiple stimuli, including strain, temperature, and pressure. The long-term water resistance of strain sensors is evaluated by continuously monitoring the resistance in underwater, sweat, and saline environment for up to 5.5 h. Underwater wireless remote control of a robotic hand is further demonstrated by mounting five sensor arrays. Moreover, different finger gestures are well recognized, making these sensor devices promising candidates for versatile waterproof wearable electronics and robotics technology.
研究领域:
材料科学
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生物医学工程
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电子工程
✓ 已验证
产品关联
DOI
ACS Applied Materials & Interfaces
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2023
·
IF 9.5
Han Zhang,Yu-Qing Liu,Shaoqing Zhao,Long Huang,Zhi Wang,Zhiyong Gao,Zhiwei Zhu,Dahai Hu,Hua Liu
Silica glass devices are widely used due to their exceptional physical and chemical properties. However, prolonged usage may result in abrasion and contamination of silica glass devices, adversely affecting the service life. One of the most effective solutions to this issue is surface modification, in which superhydrophobicity with high transmittance and mechanical robustness is highly desired. Inspired by the concept of protective armor, we proposed a novel approach for the direct integration of robust and transparent superhydrophobic structures on silica glass. In this method, microstereolithography synergistic heat treatment processes are used to create a micrometer-scale biomimetic frame on the surface of silica glass and then filled with in situ deposited nanoparticles. The superhydrophobicity of the surface can be obtained through the nanoparticles, and the biomimetic frame can protect the surface from direct contact with external objects to achieve durability. This process allows the preparation of superhydrophobic silica structures on the silica device surface at temperatures below its melting point, which prevents any damage to the devices during the heat treatment. Moreover, up to 90% transmittance does not affect the performance of silica devices. The composite structure maintains a contact angle of over 150° after multiple abrasion tests, verifying the mechanical robustness. This innovative process paves the way for forming a high mechanical robustness and excellent transmittance protective layer on silica glass devices, which expands the application field.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Yaoxun Zhang,Xin Jing,Jian Zou,Peiyong Feng,Gangrong Wang,Jiazhou Zeng,Liya Lin,Yuejun Liu,Hao-Yang Mi,Shanshan Nie
The intricate muscle arrangement structure endows the biological tissues with unique mechanical properties. Inspired by that, a mechanically robust and multifunctional anisotropic Polyacrylamide/Sodium alginate/Zirconium ion/Carbon dots (PAM/SA/Zr 4+ /CDs, PSZC) hydrogel is developed through the synergistic effect of mechanical-assisted stretching, Zr 4+ metal-coordination and CDs embedding. The resulting hydrogel exhibited an impressive tensile strength of 2.56 MPa and exceptional toughness of 10.10 MJ m −3 along the stretching direction, attributing to the oriented alignment of PAM and SA molecular chains induced by mechanical-assisted stretching and metal-coordination. The dense network structure endowed the PSZC hydrogel with excellent anti-swelling performance, achieving a swelling ratio of only 1.7% after being stored in water for 30 days. The presence of Zr 4+ conferred remarkable electrical conductivity of 2.15 S m −1 to the PSZC hydrogel. Furthermore, the integration of carbon dots imparted the PSZC hydrogel fluorescence properties, rendering it visual sensing capabilities. Overall, a straightforward strategy is proposed for fabricating a mechanically robust and multifunctional hydrogel suitable for underwater sensing and visual sensing, offering valuable insights for the development of high-performance underwater sensors.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Zuozhu Yin,Dongpeng Zhou,Min Li,Xiaoxiang Chen,Mingshan Xue,Junfei Ou,Yidan Luo,Zhen Hong
Superhydrophobic surfaces have many advantages in wetting fields. However, the lack of easyily production methods and limited mechanical/chemical/physical robustness remain the two most pertinent barriers to the scalability, large-area production, and widespread use of superhydrophobic materials. In this work, a mechanical/chemical/physical robustness superhydrophobic coating sample consisting of a regular array of square Cu mesh with secondary nano structures of polytetrafluoroethylene (PTFE) and SiO 2 powders on the sidewalls is produced through a scalable and easyily production technique of the combination of hot-press sintering and subsquent spray-coating. The Cu mesh is used as a template to fabricate the grooves and bulges as the first-level roughness, and the SiO 2 powder is maintained on the surface of the coatings to form two-level hierarchical structures, with both micro and nano structures firmly affixed by low-surface energy polymer binder (PTFE). For comparison, Cu mesh and Cu mesh/Cu sample are also produced. Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), and time-dependent apparent contact angle are used to examine the as-prepared materials. The corrosive solution, high temperature, UV irradiation , ultrasonic treatment , water drop hitting, sand drop impacting, multi-cycled sandpaper abrasion, tape-peeling test, and self-cleaning test was conducted to simulate the real-world damages. All of the armored superhydrophobic coating samples have an apparent water contact angle of more than 150°, as well as outstanding mechanical and chemical resilience. The salt spray test and mechanical behavior of the as-prepared samples revealed that the armored superhydrophobic coating sample has the lowest corrosion rate, the highest tensile strength , and the greatest elongation among these threee as-prepared samples, implying that it has the best anti-corrosion ability and mechanical property. This strategy might give guidance for the development of composite materials that need to retain mechanical/chemical/physical robustness in severe working conditions.
研究领域:
材料科学
·
表面工程学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Nan Zhou,Shuhan Hou,Insub Noh,Qingqing Liu,Yanbin Wang,Hyung Do Kim,Qi Zhou,Hideo Ohkita,Biaobing Wang
Superamphiphobic surfaces, combining both superhydrophobic and superoleophobic properties, show tremendous potential applications in various fields. However, the complicated procedures, expensive equipment, and poor mechanical robustness and durability seriously limit their commercialization. In this study, superamphiphobic surfaces have been fabricated by a simple spraying method using two different nanostructures of silicon dioxide. The nanosheet silica (about 80 nm) constructed a large-scale layer structure, and the nanospherical silica (about 30 nm) interweaved with nanosheet silica to form a double-scale “reentrant” micronano structure. The contact angle (CA) and sliding angle (SA) were estimated to be 158° and 1° for a water droplet, while the CA and SA were measured to be 154° and 3° for olive oil, meeting the superamphiphobic requirement. On the other hand, control surfaces that only adopted nanosheet or nanospherical silica just satisfy the superhydrophobic requirement. Owing to the similar chemical components of nanosheet and nanospherical silica, the two mixed very well and were uniformly dispersed, endowing the whole surface with the same superamphiphobic behavior. More importantly, the mixture of nanosheet and nanospherical silica was sprayed on the wet poly(amide-imide) (PAI) substrate, making them easily enter into the PAI film. This unique structure is helpful for improving mechanical robustness and durability. Thus, the surface wettability was nearly unaffected even though it underwent lots of tests, including sandpaper abrasion, ultrasonic treatment, acid–base immersion, UV irradiation, and boiling water jet impact. As expected, the superamphiphobic surfaces show antifouling, self-cleaning, and icing delay performances, and the icing time was prolonged from 55 to 342 s. It is believed that robust superamphiphobic surfaces with multifunctions of antiliquid-adhesion, self-cleaning, anticorrosion, and anti-icing have enormous potential applications in the industrial environment.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Zhanbo Wang,Jiahui Mei,Minghua Liu,Chaocan Zhang
The demand for superhydrophobic coatings has been rapidly increasing, extending from applications in surface antifouling to surface anti-icing and self-cleaning, driving active exploration into mechanically robust superhydrophobic coatings. Fluorinated polyurethane (FPU) is considered a promising candidate for superhydrophobic coatings. However, most FPU-based superhydrophobic coatings exhibit limited adhesion to substrates and rely on nano-SiO₂ or nanoparticles to construct micro-nano hierarchical rough surfaces. However, it has been demonstrated that the rough surfaces created by nanoparticles reduce the effective contact area between the coating and the substrate, leading to accelerated wear of the coatings. Furthermore, to ensure the durability of superhydrophobic coatings, self-healing properties must also be considered. However, most self-healing superhydrophobic coatings developed so far require prolonged high-temperature conditions or external stimuli to restore their superhydrophobicity. Therefore, developing mechanically robust superhydrophobic coatings with self-healing capabilities remains a significant challenge. In this study, we synthesized a novel fully waterborne and self-healing FPU coating using a “two-step” polycondensation method. Even on the smoothest and hardest glass substrates, the coating retained its superhydrophobicity after 200 cycles of sandpaper abrasion, 200 cycles of tape peeling, a 6-hour water droplet test and acid-base resistance tests, outperforming most previously developed superhydrophobic coatings. Additionally, the coating exhibits excellent self-healing functionality. This allowed the coating to self-heal a 100 μm scratch and restore its superhydrophobicity within 56 min at room temperature without any external stimuli. The coating also exhibited excellent self-cleaning and delayed ice formation properties. This novel design and fabrication strategy provides a new perspective for surface protection.
研究领域:
材料科学
·
表面工程
·
化学工程
✓ 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）