EUROPEAN POLYMER JOURNAL
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2022
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IF 5.546
Yaolin Hu,Haina Qi,Liu Yang,Yuqi Sheng,Yunrui Xie,Qianli Ma,Hong Shao,Wensheng Yu,Dan Li,Xiangting Dong
Flexible multiple-functional conductive anisotropic membrane made of one-dimensional directional nanomaterial has the potential applicative prospects in advanced electronic skin and strain sensor. Nevertheless, it is hard to prepare aligned polymeric composites with poly-functional high conductive anisotropy and excellent interface properties, so it has been a vital topic to fabricate and investigate such kind of composites. In this work, the fluorescent anisotropic-conduction Janus-typed nanoribbon array membrane (named as FAJNAM for short) with [Eu(TTA) 3 bipy/polymethylmethacrylate (PMMA)]//[carbon black (CB)/PMMA] Janus-typed nanoribbon as construction unit is prepared by di-axial parallel electrospinning with a di-axial parallel spinneret. Since CB will seriously affect the fluorescence intensity of the Eu(TTA) 3 bipy complex, through using Janus-typed nanoribbon as construction unit, Eu complex and CB can be confined in their own regions, realizing efficacious separation of fluorescent and electrical substances to significantly reduce the adverse effects between the two functions so as to obtain excellent red fluorescence and electrical conduction. The percolation zone of CB in Janus-typed nanoribbons membrane is determined. By adjusting the content of CB, the transition from insulation to conductivity of the FAJNAM can be realized. The highest anisotropic conduction ratio reaches ca. 10 8 when the CB content is 10 %. For the first time, the crucial of critical diffusion concentration of two-phase spinning solutions in the parallel electrospinning process is advanced and studied in depth. Furthermore, the relationship between the critical diffusion concentration and the conductive aeolotropism degree has been explored. The concept of critical diffusion concentration is also applicable to other di-axial parallel electrospinning to prepare multi-functional materials, which will be of great significance to optimize electrospinning conditions. This research provides new technical support for the preparation of highly flexible, conductive anisotropy composite materials.
研究领域:
材料科学
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电子皮肤
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Guoyan Yang,Zuozhu Yin,Xiangyu Han,Zhen Hong,Chan Xie,Yongcun Ma,Jilin Xu,Mingshan Xue
Solar desalination technology, with its green and sustainable characteristics, has become an effective solution to the problem of global freshwater shortage. However, conventional solar evaporators (SE) focus mainly on issues such as reducing the enthalpy of water evaporation and conduction heat loss. Thus, the light refraction losses caused by the surface structure under direct sunlight are neglected. In this study, inspired by corn bracts, a Janus-type SE (SWPP@PCM) with light-trapping effect was designed. By optimizing the SE surface design, the light refraction loss was significantly reduced and the light trapping capability was enhanced. The upper layer of SWPP@PCM consists of superhydrophobic wave polyurethane foam containing polypyrrole. The lower layer is a superhydrophilic hydrogel, consisting of polyvinyl alcohol, chitosan and aminated multiwall carbon nanotubes. The superhydrophobic layer reduces water droplet adhesion and promotes water vapor evaporation. The hydrophilic layer reduces the enthalpy of evaporation and accelerates water transport. Experimental results show that the evaporation rate of the SWPP@PCM solar evaporator reaches up to 3.81 kg·m −2 ·h −1 , and the evaporation efficiency under a single sunlight exposure can reach 96.21 %. Therefore, this 3D Janus self-floating SE (SWPP@PCM) with a light-trapping effect exhibits broad application potential in the fields of seawater desalination and wastewater purification.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
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IF 3.573
Ruijun Zhang,Cui Liu,Nian Li,Liqing Chen,Tingting Xu,Yi Qin,Shudong Zhang,Zhenyang Wang
Interfacial solar seawater desalination, originating from the driving force of the conversion of sunlight into heat energy, has been facing the negative influence of intermittent solar radiation alternating between night and day. Here, a novel Janus-type hybrid metamaterial is proposed to prolong “the number of hours of sunshine” for efficient solar–thermal vaporization effect based on the surplus solar-generated heat input/output across the reversible solid–liquid phase transition from phase change materials (PCMs). The coaxial fiber membrane with PCM-loaded core–sheath structure is one of the most key materials of the hybrid metamaterial to extend the sunshine duration. The two layers of the Janus-type hybrid metamaterial presented the following characteristics: one side had a fast solar–thermal conversion, in situ heat storage ability, and the other had predominantly low thermal conductivity against thermal loss and good hydrophilicity for seawater absorption. Impressively, the exploiting metamaterial demonstrates a high solar thermic vaporization efficiency of 85.7% and a stable freshwater yield of 1.62 kg m–2 h–1 under 1 sun exposure. More importantly, the Janus-type hybrid metamaterial still exhibits an additional conversion efficiency of 8% attributed to surplus solar-generated heat output even without sunlight. Therefore, such a Janus-type hybrid metamaterial can provide a promising path for higher efficient solar-to-heat utilization.
研究领域:
材料科学
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能源工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Hua Su,Pengcheng Lin,Hao Lu,Xi Zhao,Xinxin Sheng,Ying Chen
Thermal comfort is of great significance to maintain people’s healthy state in physics, physiology, and psychology. Personal thermal management (PTM) that passively regulates the immediate environment around the human body has been proposed as a promising strategy to realize on-demand human thermal comfort. In this work, we propose a one-stop solution for the state of the art PTM by combining thermal shielding and thermal energy storage in a Janus-type wearable device, which is named a Janus-type hydroxyapatite-incorporated Kevlar aerogel@Kevlar aerogel supported phase-change material gel (HKA@KPG). The lower HKA with an ultralow thermal conductivity directly attached on the skin can effectively hinder heat transfer from the external environment to human skin. The upper KPG possessing a superior form stability and high energy storage capacity can absorb the heat generated by the human body to regulate the skin temperature. Both the HKA and KPG also demonstrate excellent biocompatibility. Due to its synergistic effect in thermal energy regulation, the Janus HKA@KPG has been applied in wearable PTM in static and dynamic modes to meet the thermal comfort requirements. It is anticipated that the one-stop thermal comfort solution for thermal shielding, thermal energy storage, self-supporting characteristics, wearability, and biosafety offers new possibilities for the next generation of wearable PTMs.
研究领域:
材料科学
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热工程
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纳米技术
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生物医学工程
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可穿戴技术
✓ 已验证
DOI
PubMed
高影响因子
RENEWABLE ENERGY
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2018
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IF 4.9
Chao Wang,Enqi Bu,Ying Chen,Zhengdong Cheng,Jingtao Zhang,Riyang Shu,Qingbin Song
Photocatalytic reforming of biomass-derived hydrocarbons and water has been confirmed as an efficient approach for hydrogen production . In this work, anatase TiO 2 based Janus-type catalyst was synthesized by a selective surface modification method to realize Pickering interfacial catalytic hydrogen production through photoreforming of bio-derived biphasic system. The results showed that the Janus-type catalyst possessed a huge potential for promoting hydrogen production in biphasic system. Although the surface electrochemical hydrogen evolution property was examined to be slightly attenuated after surface modification, the as-prepared Janus-type TiO 2 exhibited almost doubled photoreforming H 2 yield at the emulsion interface than that of the bare TiO 2 in conventional biphasic system, and over 10 times higher than that of the bare TiO 2 in pure water. This excellent performance was mainly due to the exposed Janus-type anatase TiO 2 at the interface offering the high accessibility to reactants with larger mass transfer area. The reaction rate was found to be associated with the concentration of Janus-type catalyst which could directly influence the size evolution of emulsion droplet. In cyclic reaction tests, the established Pickering interfacial catalytic hydrogen production system revealed that both emulsification performance and catalytic stability had a strong influence on the cyclic stability.
研究领域:
催化
·
光化学
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可再生能源
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材料科学
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环境科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Chuanjiang Zhou,Ran Wei,Zhaoqiang Wu
To address the challenges of water absorption-induced swelling and poor underwater adhesion in conventional ionic conductive gels under humid conditions, this work developed a novel Janus-type conductive ionogel. The ionogel features a hydrophobic underwater adhesion layer (BO layer) synthesized via copolymerization of butyl acrylate and octadecyl acrylate, followed by in situ polymerization of a poly(butyl acrylate)/ N -hydroxyethyl acrylamide-based conductive ionogel layer (BHIG) atop the BO layer. The interpenetrating network structure between the BO and BHIG layers provides exceptional interfacial bonding strength, with a peeling force of up to 276.5 N m −1 . Moreover, the Janus ionogel also regulates the adhesion and environmental adaptability of the material. Specifically, the Janus ionogel exhibited switchable dual-to-single-sided adhesion under atmospheric conditions and single-sided instant adhesion in aqueous environments. Furthermore, the Janus ionogel demonstrates amphibious real-time strain sensing in both air and water. Leveraging its asymmetric structure, a Janus TENG (triboelectric nanogenerator) was fabricated without physical encapsulation, achieving efficient low-frequency energy harvesting in the environment.
研究领域:
材料科学
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高分子化学
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传感器技术
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能量收集
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2025
·
IF 7.3
Mengdi Xu,Hermela Ejegu Feysa,Xiaoqing Ni,Guangbiao Xu,Qingshuai Yan,Hua Shen,Yueqi Zhong,Xingjie Wang
Optimized management of wound exudate is pivotal in modulating the wound healing microenvironment and facilitating tissue regeneration. Conventional dressings, however, are constrained by limited absorption capacity and a slow drainage rate, frequently resulting in excessive exudate accumulation that hinders the healing process. In this study, we developed hydrophilic kapok fiber gauze (H-KG) and Janus kapok fiber gauze (J-KG) through a sustainable and scalable hydroentanglement forming process combined with chemical modification, leveraging the unique hollow tubular structure of kapok fibers. H-KG and J-KG achieved rapid absorption, high capacity storage, and efficient evaporation through synergistic wettability modulation and capillary action-enhanced liquid transport within the hollow structure. The kapok fiber-based gauze demonstrated remarkable sustainable liquid self-pumping capabilities, exhibiting a saturation absorption rate of approximately 1346% with complete liquid evaporation achieved within 1 h. In vivo experiments revealed that both H-KG and J-KG significantly mitigated wound exudate accumulation compared with cotton gauze (CG), thereby accelerating wound healing. Quantitative analysis showed that on day 12 post-treatment, the H-KG and J-KG exhibited residual wound areas measuring 48.23% and 34.41%, respectively, of CG. This work elucidated the mechanistic role of hollow fiber in exudate management while proposing an innovative wound dressing with dynamic fluid regulation capabilities.
研究领域:
生物材料
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生物医学工程
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组织工程
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伤口愈合
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流体传输材料
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纤维科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·
IF 6.4
Ling Wang,Wenjuan Xia,Yijia Yu,Shengjie Liu,Yao Peng,Zhaoqiang Wu,Hong Chen
Flexible sensors have been widely studied for their huge potential applications in health monitoring, soft robots and electronic skin. However, the simple and rapid preparation of Janus-type flexible adhesive sensors with adhesive properties on one side and no adhesive properties on the other side is still a great challenge. In this work, we first used the different solubilities of silk fibroins in water and the hydrophobic ionic liquid 1-ethyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl] ([EMIM][Tf2N]) to prepare Janus-type ionic conductive gels by a “one-step” method of UV irradiation. In this system, the noncovalent bond interaction between poly(N,N-dimethylacrylamide) (PDMA) and [EMIM][Tf2N] and the substrate endows the gel with strong adhesion, and the ionic liquid [EMIM][Tf2N] endows the gel with conductivity and bactericidal properties. However, silk fibroins in ionic gels have a ladder distribution due to different solubilities and are concentrated on the other side of the gel so that the side of the gel does not have adhesion. Additionally, the β-sheet structure of silk fibroins gives the ionic gel greater toughness. Janus-type ionic conductive gels prepared by this method have super tensile properties (2671%), excellent bactericidal properties (99.99%) and strong adhesion to a variety of substrates (such as glass, rubber, metal, and plastic) and skin. Moreover, the Janus-type ionic conductive gel has excellent electromechanical properties, such as good sensitivity, low hysteresis and good repeatability, when used as a sensor and can realize multifunctional detection of the human body's various strain movements and pressure changes. Based on the simple and easy-to-operate preparation method and the endowed excellent electromechanical characteristics of the Janus-type ion-conductive gel, it has broad application prospects in the fields of multifunctional wearable sensors.
研究领域:
材料科学
·
电子学
·
生物医学工程
·
纳米技术
✓ 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）