Surfaces and Interfaces
·
2025
·
IF 6.3
Yinchuan Pu,Duoduo Huang,Su Wang,Wei Xu
Developing robust and durable superhydrophilic surfaces on polyethylene terephthalate (PET) films is critical for advancing their applications in self-cleaning and biomedical technologies. In this study, a coating solution containing polyethyleneimine and HDI polyisocyanate was bar-coated onto PET film surfaces and subsequently cross-linked to form a dense R-NH-CO-NH-R' covalent network. After modification, the PET film surfaces demonstrated superhydrophilicity (WCA=0°) accompanied by a significant increase in surface energy to 79.4 mN/m, while achieving excellent 5B-grade adhesion. Furthermore, when exposed to 40-hour immersion in aqueous solutions, the modified surfaces maintained their superhydrophilicity (0° WCA) with essentially unchanged surface energies. The coatings showed near-complete surface coverage along with substantial covalent bonds retention. Such crosslinking construction approach via bar-coating exhibits promising potential for PET films in superhydrophilic applications.
研究领域:
生物医学工程
·
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2025
·
IF 12.1
Jianing Song,Yao Luo,Jinlong Yang,Yong Li,Harry Qi,Ningyuan Xu,Huijuan Shao,Yishen Zhang,Yan Zhou,Zhenbing Luo,Deuhui Wang,Xu Deng
Window screens serve the multiple purposes of enabling ventilation while preventing the ingress of solid objects and insects. However, their intrinsic porosity makes them susceptible to fluid intrusion while maintaining ventilation, notably evident in the infiltration of high-velocity raindrops during inclement weather, flooding the room. Addressing this challenge, bilayer synergistic mesh featuring an upper superhydrophilic (SHPi) surface and a bottom Janus wettability designed is presented to withstand puncture from continuous high-speed droplets. This innovative design incorporates a dual waterproof mechanism, providing instantaneous penetration resistance through energy dissipation and long-term infiltration resistance by a stable liquid film against high-speed droplets. The SHPi-Janus bilayer synergistic mesh demonstrates exceptional capability in repelling droplet penetration at a vertical high velocity of 4.5 m s −1 , significantly mitigating droplet infiltration under most rainfall conditions in the real world. Experimental findings reveal that the droplet penetration ratio of SHPi-Janus mesh is a mere 3.6% under sustained high-velocity droplet impact, a substantial leap forward compared to the 61.1% observed with commercial screen.
研究领域:
材料科学
·
流体力学
·
界面化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Yuqing Sun,Chenye Dai,Jian Lu,Yapeng Zhu,Yingxuan Deng,Xianyin Cai,Dong Zou,Wenheng Jing
Oil droplets are inevitably deposited on the surface of membranes, resulting in membrane contamination during oily sewage separation. To effectively prevent oil fouling, a TiO 2 @MXene membrane with an ultra-glossy hydrophilic surface was designed via in-situ thermal induction to regulate the membrane surface structure and properties. Through high temperature-induced evolving the Ti valence and the functional groups of Ti 3 C 2 T x , uniform TiO 2 nanoparticles were generated in-situ on the Ti 3 C 2 T x surface while altering the surface structure and properties, which considerably improved the hydrophilicity, underwater oleophobic properties, and surface finish of the membrane. Specifically, the TiO 2 @MXene membrane (MT600) exhibited a low water contact angle of 7.5° and a high underwater oil contact angle of 133.3°. Notably, the oil adhesion force of the membrane was as low as 0.0013 μN, outperforming most oil water separation membranes. Thus, the unique structure and surface properties endowed MT600 membrane with excellent oil retention (TOC removal efficiency of > 95 %) and antipollution ability (permeance decay rates of < 10 %) for oil-in-water emulsion separation. This is because the ultra-glossy hydrophilic and oleophobic surface prompted the formation of a continuous and stable hydration layer on the membrane surface and prevented oil droplets from falling into the membrane grooves. Benefiting from the robust, ultra-glossy surface, the MT600 membrane exhibited excellent long-term durability and reusability (emulsion permeance recovery of > 90 %) in high-salt, highly acidic, and highly alkaline environments. This study opens pathways to realize ultra-glossy membrane surface for the efficient demulsification of small size emulsions and long-lasting, stable oil water separation.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Lizhi Zhao,Xiaofu Wang,Lixian Wang,Shuhao Chen,Guangyue Du,Baitao Xu,Hui Ye,Qingping Xin,Yuzhong Zhang
The scarcity of freshwater resources has emerged as a significant challenge for humanity. Fog harvesting, a process that converts atmospheric fog into readily accessible water, presents a promising solution. However, the surfaces currently developed for fog collection still face the problems of low efficiency and poor stability. To address these issues, this study designed a biomimetic hydrophobic slippery-superhydrophilic (SLIPS-SHPH) patterned surface. The surface was fabricated by a masked spray coating and lubricant infusion. By refining the pattern design, the wedge-shaped SHPH patterns, with a smaller size and an optimized total area ratio to SLIPS in a dispersed arrangement, were created. The SLIPS-SHPH integrates beetle- and cactus-spine-inspired SHPH patterns for fog accretion/droplet motion and pitcher-plant-mimicking SLIPS for droplet delivery/detachment. This synergy enables an efficient cycle of “fog capture-droplet transport-droplet release”, and achieves a water collection efficiency of 2462 mg·h–1·cm–2, 1.75 times that of the homogeneous hydrophobic surface. Notably, the SLIPS-SHPH patterned surface demonstrates excellent stability over a 120 h testing period owing to the stable water repellence of SLIPS. The research on the multilevel biomimetic strategies and pattern regulation provides a feasible way for efficient and sustainable fog collection.
研究领域:
环境科学
·
材料科学
·
仿生学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2015
·
IF 2.358
Ling Yang,Shuxue Zhou,Limin Wu
Titania/poly(methyl methacrylate) core/shell (TiO 2 /PMMA) latex was synthesized by miniemulsion polymerization and further mixed with modified colloidal silica to create waterborne nanocomposite coatings (M-SiO 2 /TiO 2 /PMMA). The coatings were undergone accelerated weathering tests and their surface wettability, transparency, and morphology were monitored as a function of weathering time. Superhydrophilic surfaces were attained after 27–34 h aging, being attributed to the unique distribution of TiO 2 nanoparticles in PMMA phase. In contrast to the coating based on the mixture of M-SiO 2 , TiO 2 nanoparticles, and PMMA latex, this time is quite short and absolutely benefit for their outdoor application. Due to the degradation of organic matrix, transparency reduction and film thickness loss of coatings took place in weathering tests. Nevertheless, these undesired evolutions can be alleviated by decreasing film thickness or using adequate quantity of TiO 2 /PMMA latex. Photodegradation experiments of methyl blue indicate that the formed superhydrophilic coatings are excellent in self-cleaning performance.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Tiantai Kang,Liangjiong Yang,Ying Yang,Hao Jiang,Yan Jiang,Hongwen Zhang
This article investigates an intelligent composite membrane material featuring reversible transitions between superhydrophobic and superhydrophilic surfaces. First, epoxy resin porous membranes (EP) were fabricated via the breathing figure (BF) approach. The relationship between the curing degree of epoxy resin, the polymer concentration, and the surface wettability of the porous membranes was systematically explored. After growing SiO 2 on the surface of the porous film, an EP/SiO 2 superhydrophobic composite film was successfully prepared (WCA≈159°). The surface morphology of the sample was observed by scanning electron microscopy, and combined with the contact angle measurement results, the optimal growth time was determined to be 2.5 h. Interestingly, after the samples were placed in a high-humidity environment for 10 h, they changed from superhydrophobic to superhydrophilic (WCA = 0°), and then regained their superhydrophobicity after being heat-treated for 40 min. The analysis results of XPS scanning of the sample surface indicate that the reversible switching of wettability is realized through the alteration of surface chemical composition. This mode of reversible transformation between superhydrophobicity and superhydrophilicity realized through water absorption and heating will possess highly potential application values in technical domains such as oil–water separation, smart materials, and self-cleaning.
研究领域:
材料科学
·
高分子化学
·
表面工程
·
智能材料
·
分离技术
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Jianlin Sun,Xiubing Jing,Shuxian Zheng,Beichao Shi,Dawei Zhang,Huaizhong Li
Nowadays, the water shortage has emerged as a critical global issue, driving the need for innovative solutions in water collection and management. Inspired by the special wettability surface of Nepenthes, a method for preparing a slippery surface and composite superhydrophobic–hydrophilic surface based on zirconia is presented. The fabrication process of slippery surface mainly comprises three steps: liquid-assisted laser ablation, fluorosilane modification, and infusion of lubricating liquid. The composite wetting surface is achieved by fabricating hydrophilic patterns on a superhydrophobic surface. Experiment results revealed that surfaces with the multi-scale microstructure exhibits the optimal wettability performance. Utilizing these special wettability surfaces, we developed and integrated a water collection platform. In particular, theoretical analysis and experimental investigation were conducted on the droplet transport mechanism of the platform. Furthermore, the stability of the slippery surface on platform was assessed, revealing its potential for long-term use in passive water collection applications. Therefore, this work enhances the understanding of the fundamental research and provides valuable strategy and insight for design and preparation of sustainable and efficient water collection systems.
研究领域:
材料科学
·
环境科学
·
仿生学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Liming Liu,Yunlu Pan,Keda Jiang,Xuezeng Zhao
Materials with common super-wettability are always restricted either by the pores fouling by oil (super-hydrophobicity/super-oleophilicity), or by the formation of hydration layer in advance (super-hydrophilicity/underwater super-oleophobicity) during oil water separation. To resolve this problem, super-oleophobic/super-hydrophilic surfaces were fabricated by introducing magnetic nanoparticles, short-chain fluorine groups and hydrophilic-induced units into the 2D or 3D substrates. Wettability formation mechanism was systematically investigated by combining theoretical calculation with characterization of surface micro-morphology and chemical composition. Surfaces with the uncommon super-wettability exhibited excellent anti-oil fouling ability, and can be directly used for oil water separation in way of “water removing”. Moreover, a solvent-responsive wettability transition strategy was proposed, which can reversibly convert the super-oleophobic/super-hydrophilic surfaces into super-oleophilic/underoil super-hydrophobic surfaces within 10 s. Then, free light or heavy oil/water separation and demulsification of oil-in-water emulsions and water-in-oil emulsions were achieved through the switchable surface wettability toward water and oil. Furthermore, the super-wettability of as-prepared samples are almost unchanged even after the test of immersion in pH = 1 acid and pH = 14 alkali solution for 48 h and 100 cycles of successive cyclic compression. Hence, these unique advantages of the super-oleophobic/super-hydrophilic surfaces are promising for multitasking and highly efficient oil water separation and demulsification.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2021
·
IF 4.126
Long Jiao,Yixiao Wu,Yanjun Hu,Huaping Wu,Zhang Xu,Long Han,Qianqian Guo,Dongliang Li,Rong Chen
Droplet-based microfluidics, which manipulate mini-discrete droplets on surfaces to accomplish various chromogenic/fluorescence reaction-based detections, are promising for microminiaturization of analysis systems. However, rapid droplet evaporation in unsaturated surroundings is a complex problem. In this study, we proposed an ingenious concept of generating an oil/water microreactor on a superoleophobic/oleophilic-superhydrophobic/hydrophilic (SOB/OL-SHB/HL) multilevel patterned surface. A dual droplet with a nonvolatile liquid packing layer and a volatile droplet core was formed on the surface, achieving overt evaporation attenuation of the droplet core. The wettabilities of the SOB/OL-SHB/HL surface were first investigated. In addition, due to their outstanding configurability, oil/water microreactors with different pattern shapes, diverse compositions, and scale-up array configurations were obtained in a simple way. Due to the overt evaporation attenuation, the storage times of the reactants and products were markedly prolonged. Finally, as proofs of concept, oil/water microreactors were successfully applied to detect the target ion and to construct a droplet-based pH detector. The proposed oil/water microreactor on the SOB/OL-SHB/HL surface with distinct precision, flexibility, and high throughput is important to the development of high-performance microfluidic chips used in diagnosis, environment monitoring, chemical analysis, and particle synthesis.
研究领域:
分析化学
·
微流控技术
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
Nature Physics
·
2025
·
IF 18.4
Liu Song,Sun Pengcheng,Wang Mingyue,Jiang Yujie,Li Jiaqi,Jia Yuyu,Sun Zhenhuan,Yang Yuting,Liu Hai,Lu Haojian,Wang Zuankai
Droplet microfluidics, a versatile technique for the precise manipulation of discrete droplets, has revolutionized biological and chemical research. So far, the successful implementation of droplet microfluidics necessitates the choice of non-wetting surfaces with minimal pinning forces, which hinders its broader adoptions in clinical applications. Here we report acousto-dewetting, a liquid dewetting principle that enables the three-dimensional, remotely controllable and precise operation of droplets on surfaces of any wettability, including superhydrophilic surfaces. This principle originates from the intricate interplay between acoustic streaming and droplet dynamics due to the extreme confinement of ultrasound within droplets, with an enhancement in pressure gradient of three orders of magnitude compared with traditional ultrasound-based approaches. We show that on superhydrophilic surfaces, acousto-dewetting achieves a contact line moving velocity that is two orders of magnitude higher than the previous limit and eliminates the undesired viscous film stemming from viscous dissipations. We developed a droplet microfluidics approach that achieves versatile droplet manipulation in various extreme scenarios associated with superhydrophilic surfaces, and applied it to an in vivo clinical setting for the rapid and safe removal of thrombus as well as drug delivery.
研究领域:
微流控技术
·
生物医学工程
·
超声技术
·
临床应用
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Ruobin Dai,Hongyi Han,Tianlin Wang,Xuesong Li,Zhiwei Wang
The presence of endocrine disrupting compounds (EDCs) in water and wastewater poses potential risks on aquatic environment and human health. Conventional polyamide (PA) nanofiltration (NF) membrane showed poor rejection against EDCs due to unfavorable hydrophobic interaction. In this study, we introduced MoS 2 nanosheets (NS) to PA NF membrane by pre-deposition before the interfacial polymerization process, creating hydrophilic surface and nanochannels in the PA rejection layer to enhance removal of hydrophobic EDCs from wastewater. Results showed that the MoS 2 NS intercalated membrane simultaneously enhanced water permeance and EDCs rejection, with water/EDC selectivity nearly 6 times larger compared to the control. The enhanced EDC rejection was primarily attributed to the suppressed hydrophobic interaction between membrane surface and hydrophobic EDCs, as well as the selective effect by the MoS 2 NS-induced nanochannels. Further calculation based on the solution-diffusion theory indicated that for MoS 2 NS intercalated membranes the selective nanochannels played a more important role than the hydrophilic surface in impeding the transport of EDCs across the PA layer. The feasibility of the MoS 2 NS intercalated PA membrane for EDC removal was also verified using EDC-contaminated real wastewater . The results of this work highlight the potential of using the designed NF membranes for efficient removal of targeted organic micropollutants from water and wastewater.
研究领域:
环境工程
·
膜科学
·
水处理
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ANALYST
·
2024
·Vol. 149
·期 13
·3522-3529
·
IF 3.6
Hui Zeng,Shan Zhou,Xin Zhang,Qirui Liang,Miao Yan,Yeqing Xu,Yaxin Guo,Xiaomeng Hu,Lei Jiang,Biao Kong
Bioinspired nanochannel-based sensors have elicited significant interest because of their excellent sensing performance, and robust mechanical and tunable chemical properties. However, the existing designs face limitations due to material constraints, which hamper broader application possibilities. Herein, a heteromembrane system composed of a periodic mesoporous organosilica (PMO) layer with three-dimensional (3D) network nanochannels is constructed for glutathione (GSH) detection. The unique hierarchical pore architecture provides a large surface area, abundant reaction sites and plentiful interconnected pathways for rapid ionic transport, contributing to efficient and sensitive detection. Moreover, the thioether groups in nanochannels can be selectively cleaved by GSH to generate hydrophilic thiol groups. Benefiting from the increased hydrophilic surface, the proposed sensor achieves efficient GSH detection with a detection limit of 1.2 μM by monitoring the transmembrane ionic current and shows good recovery ranges in fetal bovine serum sample detection. This work paves an avenue for designing and fabricating nanofluidic sensing systems for practical and biosensing applications.
研究领域:
材料科学
·
纳米技术
·
生物传感器
·
分析化学
✓ 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）