JOURNAL OF POLYMER SCIENCE
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2022
·Vol. 60
·期 11
·1710-1717
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IF 3.046
Guo-Xing Li,Xiao-Wei Qu,Lu-Wei Hao,Qing Li,Su Chen
From the implementation point of view, the printable magnetic Janus colloidal photonic crystals (CPCs) microspheres are highly desirable. Herein, we developed a dispensing-printing strategy for magnetic Janus CPCs display via a microfluidics-automatic printing system. Monodisperse core/shell colloidal particles and magnetic Fe 3 O 4 nanoparticles precursor serve as inks. Based on the equilibrium of three-phase interfacial tensions, Janus structure is successfully formed, followed by UV irradiation and self-assembly of colloid particle to generate magnetic Janus CPCs microspheres. Notably, this method shows distinct superiority with highly uniform Janus CPCs structure, where the TMPTA/Fe 3 O 4 hemisphere is in the bottom side while CPCs hemisphere is in the top side. Thus, by using Janus CPCs microspheres with two different structural colors as pixel points, a pattern with red flower and green leaf is achieved. Moreover, 1D linear Janus CPCs pattern encapsulated by hydrogel is also fabricated. Both the color and the shape can be changed under the traction of magnets, showing great potentials in flexible smart displays. We believe this work not only offers a new feasible pathway to construct magnetic Janus CPCs patterns by a dispensing-printable fashion, but also provides new opportunities for flexible and smart displays. Graphical
研究领域:
材料科学
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显示技术
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Nan Li,Zulong Zhang,Jintao Zhu,Yuanyuan Yin,Yingjun Xu
Single-mode personal thermal-moisture management fabrics cannot ensure the comfort and safety of the human body in high-temperature, high-humidity, and complex environments. Here, a tri-cooling cotton fabric (TCCF) that combines evaporation, convection, and heat storage with a converging pore array, Janus wetting structure and phase change microcapsule is demonstrated. Benefiting from its Janus wetting structure and converging pore array, the TCCF exhibits excellent unidirectional sweat-wicking performance (717 unidirectional transfer index) and rapid water vapor transmission (223.0 g/m 2 /h). The TCCF can lower the temperature by 4.5 °C through evaporation and convection compared with conventional cotton. Furthermore, the TCCF demonstrates excellent buffering capacity for sudden temperature changes. Evaporation, convection, and heat storage help cool the human body in complex environments.
研究领域:
纺织科学
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材料科学
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生物医学工程
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DOI
PubMed
高影响因子
CARBON
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2024
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IF 10.5
Meng Zhou,Yuzhu Hu,Zhiguo Yan,Heqing Fu
The incorporation of polymers into MXene-based functional materials has been proven to be an effective strategy for improving their flexibility and mechanical properties. However, insulating polymers inevitably sacrifice the conductivity of MXene , resulting in a deterioration of electromagnetic interference (EMI) shielding performance. In this work, inspired by Janus structure, an asymmetric flexible film composed of the carboxylated styrene-butadiene rubber (XSBR) with magnetic boron nitride nanosheets (mBNNS) layer and the MXene layer is developed through a casting plus spraying approach. The resulting mBNNS/XSBR@MXene (BXM) Janus film demonstrates the characteristic of “one side insulation, one side conductivity”, with the conductivity of 2746 S cm −1 on the MXene side and surface resistivity of 4.9 × 10 13 Ω on the mBNNS/XSBR side. Profit from the designed Janus architecture, the EMI shielding effectiveness and in-plane thermal conductivity of the BXM Janus film reach 74.55 dB and 8.45 W m −1 K −1 when the total mass fraction of mBNNS and MXene is 50 wt%, which is 148 % and 43.46 % higher than that of the BXM blend film without Janus structure. Moreover, the BXM Janus film exhibits low applied voltage (∼3.0 V) driven Joule heating performance with a response time of less than 10 s, a saturation temperature of 133.7 °C, and long-term steady reliability. Meanwhile, the BXM Janus film possesses good mechanical properties and excellent EMI shielding stability. Therefore, this work provides an effective strategy to fabricate flexible MXene-based multifunctional film for EMI shielding, heat dissipation, and thermal management applications.
研究领域:
材料科学
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电子工程
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热管理
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高影响因子
Nanoscale
·
2020
·Vol. 12
·期 12
·6717-6728
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IF 6.895
Dong-Dong Qin,Ying-Jie Zhu,Ri-Long Yang,Zhi-Chao Xiong
Solar energy-driven interfacial water evaporation is a promising energy utilization technology in the field of seawater desalination and water purification. However, the accumulation of salt on the heating surface severely impairs the water evaporation performance and long-time stability. Herein, we demonstrate a new kind of photothermal paper comprising a high-temperature-resistant paper made from ultralong hydroxyapatite nanowires and glass fibers and black nickel oxide (NiO) nanoparticles for solar energy-driven desalination. Owing to the high photothermal conversion ability, fast water transportation in the air-laid paper, and good heat insulation, the hydrophilic HN/NiO photothermal paper can achieve efficient, stable and recyclable water evaporation performance. In addition, a Janus HN/NiO photothermal paper based on hydrophobic sodium oleate-modified ultralong hydroxyapatite nanowires has been developed, and it has a high water evaporation efficiency of 83.5% under 1 kW m−2 irradiation. In particular, with the bottom hydrophobic ultralong hydroxyapatite nanowire layer and water-transporting channels in the air-laid paper to facilitate salt exchange, the as-prepared Janus evaporator exhibits no salt accumulation on the surface, high performance and long-time stable desalination using simulated seawater (3.5 wt% NaCl). Furthermore, the Janus evaporator with the hydrophobic ultralong hydroxyapatite nanowire substrate can be extended to support other photothermal materials such as black titanium oxide (Ti2O3) and Ketjen black carbon. The as-prepared Janus HN/Ti2O3 and Janus HN/KB photothermal paper also exhibit salt-resistant desalination function. The as-prepared Janus salt-resistant photothermal paper with efficient, stable and recyclable merits has great potential in solar energy-driven desalination and water purification.
研究领域:
材料科学
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环境科学
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能源科学
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PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2022
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IF 8.025
Yiwei Zhan,Yacheng Xing,Quan Ji,Xiaomei Ma,Yanzhi Xia
To construct conductive hydrogels with a conductive and a non- or weakly conductive layer for comfortable and safe electronic application, marine biobased anionic polysaccharide sodium alginate (SA) and neutral polyvinyl alcohol (PVA) were employed as the hydrogel matrixes. Tannic acid (TA) was exploited to mediate the demixing of the miscible aqueous solution of SA and PVA in view of the much larger interaction strength of TA with PVA than both of TA with SA and PVA with SA calculated from the density functional theory (−40.21, −29.77 and −21.00 kcal·mol −1 respectively). The finally-fabricated alginate/PVA composite hydrogels not only possess a “Janus” hierarchy but manifest asymmetrical conductivity, i.e., one layer strongly conductive and another weakly conductive. The strongly conductive layer achieves a conductivity of more than 2.95 S·m −1 , facilitating their application in soft electronic areas like human-machine interfaces, smart wearable devices and soft robots. The weakly conductive layer with the conductivity less than 0.60 S·m −1 and the thickness adjustable, constitutes a protective screen for another layer. The Janus hydrogels exhibit good mechanical performance, excellent strain-sensing performance and fatigue-resistant mechanics, conductivity and sensitivity.
研究领域:
材料科学
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生物医学工程
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PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2024
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IF 18.5
Xuan Liu,Hui Jie Zhang,Shuangshuang Xi,Yifan Zhang,Ping Rao,Xiangyu You,Shaoxing Qu
Hydrogel coatings are crucial strategies for integrating substrates with functional surfaces. Hydrogel coating with a facile coating process, high toughness, and ultrathin thickness is highly desired. This study utilizes the self-assembly of hydrophobic lignin into chain-dense regions during solvent evaporation and constructed a hydrogel coating with Janus structure from hydrophilic polymer and hydrophobic lignin through a facile coating-drying-swelling process at room temperature (25 °C). The Janus structure formed as the hydrophobic lignin-aggregated regions remained at the bottom while the hydrophilic polymer swell at the top. The lignin-aggregated regions constrained the swelling of the hydrogel coating, allowing for an ultrathin coating layer of ≈8 µm. Additionally, the lignin-aggregated region increases the stiffness and toughness of the thin hydrogel coating film by establishing strong interfacial bonding with the substrate via dense Van der Waals forces, thereby increasing overall adhesion energy with thin thickness and to various substrates such as glass, polytetrafluoroethylene (PTFE), metal, and rubber. The hydration layer is formed by the hydrophilic polymer swollen on top, which improves lubrication and antifouling properties. Furthermore, the hydrogel coating exhibits high stability in water and saline solutions, ultraviolet shielding properties, and the ability to be removed and recycled after use.
研究领域:
材料科学
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表面工程
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生物材料
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高影响因子
MACROMOLECULAR RAPID COMMUNICATIONS
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2024
·Vol. 45
·期 23
·2400556
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IF 4.2
Liwen Shen,Pei Wang,Shuangfei Xiang,Shujun Zhao,Feiya Fu,Qingqi Dong,Xiangdong Liu
Integration of hydrophobic and antibacterial functionalities into polyester-cotton blended (PTCO) textiles has attracted more attention but remains a challenge. Here, a Janus fabric with antibacterial effect, hydrophobicity, and enhanced moisture-permeability is fabricated using a “mist polymerization” approach. The PET fibers in the PTCO fabric are amino-functionalized through ammonolysis reactions of PET molecules with HDA, and mist treatments of poly lauryl methacrylate (PLMA) and poly(DMC-co-MA) (PDM) are applied on the two side surfaces of the PTCO-HDA fabric, respectively. The resulting Janus fabric exhibits an antibacterial rate of 99.9% against both E. coli and S. aureus , along with a hydrophobic property on its single side (PTCO-HDA@PLMA). Additionally, the establishment of a surface-free energy gradient across the fabric confers superior moisture-permeability to the Janus fabric, offering advantages in preserving textile comfort. Moreover, this approach does not significantly compromise the original fabric properties, such as mechanical strength, moisture permeability, and fabric softness. The proposed method offers a straightforward and scalable strategy for textile finishing, demonstrating great potential in expanding the application scope of PTCO fabrics, and it may hold a pivotal role in diverse applications, notably encompassing home textiles, wound dressings, and high-performance sportswear.
研究领域:
纺织科学
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材料科学
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生物医学工程
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PubMed
高影响因子
POLYMER BULLETIN
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2023
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IF 3.2
Qi Haina,Wang Guoyi,Hu Yaolin,Shao Hong,Ma Qianli,Li Dan,Yu Wensheng,Zhang Xuejian,Dong Xiangting,Chang Limin
Using conjugate electrospinning technology to prepare Janus-structure nanofiber array and endow it with multifunctional characteristics is a very meaningful research topic. Here, photochromic adjustable magnetic bifunctional {[Eu(BA) 3 phen (EBP) + Tb(BA) 3 phen (TBP)]/polyvinylpyrrolidone (PVP)}//[Fe 3 O 4 /PVP] Janus-structure nanofiber array (defined as PM-JNA) is constructed by conjugate electrospinning. Janus-structure nanofibers are arranged in a micro-orientation, and most nanofibers have a special Janus structure. This structure confines the magnetic material and fluorescent material in two nanofibers, respectively, reduces the influence of magnetic material on fluorescence intensity, and significantly improves the fluorescence performance of the specimen. The using of conjugate electrospinning solves the problem of mutual diffusion of spinning liquid in the spinneret in parallel electrospinning and improves the separation efficiency of fluorescent substances and magnetic substances. Adjustable magnetic and luminous colors can be obtained by changing the contents of Fe 3 O 4 , EBP and TBP. Janus-structure nanofibers have been widely used in biological monitoring, medical imaging, nanodevices and multifunctional materials. Graphical abstract
研究领域:
材料科学
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纳米技术
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生物医学工程
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DOI
高影响因子
LANGMUIR
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2024
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IF 3.7
Qiang Wang,Zhihao Shen,Qiuxia Wang,Chuanqi Li,Haidong Jia,Han Sun,Pingan Pei,Chang Shan,Liangyu Wu,Yifan Luo,Han Jia,Pan Huang
Great aqueous dispersibility, a large specific surface area, and high impermeability make graphene oxide (GO) the ideal candidate for a high-performance corrosion inhibitor. Numerous symmetrical modification methods have been reported to enhance the adsorption of GO on metal surfaces in various corrosive media. This work aims to investigate the enhancement and mechanism of unilateral hydrophobic modification on the corrosion inhibition performance of GO. In this study, amphiphilic Janus GO (JGO) was prepared by grafting hydrophobic alkyl chains on one side of GO, and its anticorrosion performance was evaluated via weight loss experiments and electrochemical tests. The results revealed that the corrosion inhibition efficiency for Q235 mild steel (MS) in a 1 M HCl aqueous solution of 25 ppm JGO (81.08%) was much higher than that of GO at the same concentration (22.12%). Furthermore, the Langmuir adsorption isotherm and computational study demonstrated that the synergistic effect of physical adsorption and chemical adsorption promoted the hydrophilic side of JGO close to the surface of the metal, and the dense protective layer was formed by the hydrophobic chains toward the corrosive medium, which effectively hindered the corrosion of MS by the acidic liquid. This study emphasizes the significant role of asymmetrically modified hydrophobic alkyl chains in improving the corrosion prevention performance of GO and provides a perspective for the structural design of GO-based corrosion inhibitors.
研究领域:
材料科学
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腐蚀与防护
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PubMed
高影响因子
Materials Horizons
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2024
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IF 12.2
Jianwei Yuan,Su Li,Zhaofei Dang,Sixia Liu,Fu Yang,Dongguang Wang,Hengcong Tao,Shuying Gao,Edison Huixiang Ang
Homojunction engineering holds promise for creating high-performance photocatalysts, yet significant challenges persist in establishing and modulating an effective junction interface. To tackle this, we designed and constructed a novel Janus homojunction photocatalyst by integrating two different forms of triazole-based carbon nitride (C3N5). In this design, super-sized, ultrathin nanosheets of carbon-rich C3N5 grow epitaxially on a nitrogen-rich honeycomb network of C3N5, creating a tightly bound and extensive interfacial contact area. This arrangement enhances the built-in internal electric field (IEF) between the two forms of C3N5, facilitating faster directional transfer of photogenerated electrons and improved visible-light harvesting. Consequently, Janus-C3N5 achieves a remarkable H2 evolution rate of 1712.4 μmol h−1 g−1 under simulated sunlight, which is approximately 5.58 times higher than that of bulk C3N5 (306.8 μmol h−1 g−1) and 14.1 times higher than another form of bulk C3N5 (121.2 μmol h−1 g−1). This work offers a new approach to design efficient homojunction-based photocatalysts.
研究领域:
材料科学
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能源化学
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PubMed
高影响因子
DESALINATION
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2021
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IF 9.501
Qingmiao Wang,Li Wang,Shaoxian Song,Yanmei Li,Feifei Jia,Tao Feng,Ning Hu
Interfacial solar desalination has been widely considered as one of the promising pathways to alleviate worldwide water scarcity . An ideal evaporator for interfacial solar desalination in practical use requires facile preparation, high efficiency, low cost, flexibility, excellent salt resistance, and good stability, etc. This work presents the high-performance solar desalination by using a flexible 2D@3D Janus evaporator, which is prepared via a facile two-step dipping strategy. Due to the hydrophobicity-induced interfacial layer , the top layer of the Janus evaporator plays the role of effective solar harvesting and solar-to-heat conversion, and salt rejection, while the hydrophilic bottom layer accounts for efficient heat localization and continuous water supply. Consequently, under the low solar irradiations (1.0–2.5 kW m −2 ), the Janus evaporator exhibits high-performance freshwater output (1.2–3.1 kg m −2 h −1 ), high-efficiency solar conversion (90.67%–94.62%), and excellent desalination performance. In addition, this Janus evaporator shows well flexibility and structural stability, good cost effectivity and long-term salt resistance over 7 days for continuous steam generation. By combining these advantages, this Janus evaporator holds great promise in solar-driven water purification , sterilization, and so forth.
研究领域:
材料科学
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环境科学
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能源科学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Yong Li,Pei Wang,Maoshuang Chen,Jinlin Chen,Wenjia Huang,Shuangfei Xiang,Shujun Zhao,Feiya Fu,Xiangdong Liu
Natural cotton fibers have attached considerable attention due to their excellent wearing comfort, breathability and warmth. However, it remains a challenge to devise a scalable and facile strategy to retrofit natural cotton fibers. Here, the cotton fiber surface was oxidized by sodium periodate with a mist process, then [2-(methacryloyloxy) ethyl] trimethylammonium chloride (DMC) was co -polymerized with hydroxyethyl acrylate (HA) to obtain an antibacterial cationic polymer (DMC- co -HA). The self-synthesized polymer was covalently grafted onto the aldehyde-functionalized cotton fibers via an acetal reaction between hydroxyl groups of the polymer and aldehyde groups of the oxidized cotton surface. Finally, the resulted Janus functionalized cotton fabric (JanCF) revealed robust and persistent antimicrobial activity . The antibacterial test showed that when the molar ratio of DMC/HA was 50: 1, JanCF possessed the best BR (bacterial reduction) values of 100 % against Escherichia coli and Staphylococcus aureus . Furthermore, the BR values could be maintained over 95 % even after the durability test. In addition, JanCF exhibited excellent antifungal activity against Candida albicans . The cytotoxicity assessment confirmed that JanCF exhibited a reliable safety effect on human skin. Particularly, the intrinsic outstanding characteristics (strength, flexibility, etc.) of the cotton fabric were not considerably deteriorated compared to the control samples.
研究领域:
材料科学
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生物医学
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）