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
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材料科学
·
表面工程
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产品关联
DOI
高影响因子
JOURNAL OF POLYMER ENGINEERING
·
2024
·Vol. 44
·期 5
·347-353
·
IF 1.7
Sida Fu,Haidong Li,Hongtao Liu,Yan Zhao,Zhiguang Xu
In this study, superoleophobic and superhydrophilic fabrics with self-healing property have been prepared by the use of chitosan (CS), sodium tripolyphosphate (TPP), Capstone FS-60 (FS-60), and dopamine hydrochloride as coating materials. The coated fabrics show oil contact angle of 154° for soybean oil, and water droplets can be spread on the surface in 1 s. Notably, it is further demonstrated that the coating has self-healing property. After undergoing home laundering, Martindale abrasion, or acid/base etching, the fabrics lose their superoleophobic and superhydrophilic property, while they can restore the superoleophobic and superhydrophilic property by just being wetted with distilled water and then heated in an oven. Additionally, the coated fabrics prove effective in separating oil/water mixtures. These fabrics, endowed with superoleophobic and superhydrophilic property along with self-healing capability, present innovative features and applications across diverse fields.
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
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Jian Wang,Feiran Li,Yunlu Pan,Fang Chen,Cong Huang,Xuezeng Zhao
Selective superwetting surfaces preserve the opposite superwetting properties of oil and water and have attracted considerable attention for their application in oil-water separation owing to their efficient surface energy since 2000. Among these surfaces, superoleophobic/superhydrophilic surfaces are considered remarkable because of their anti-oil properties. The coexistence of superoleophobicity and superhydrophilicity poses a challenge based on the traditional surface/interface theory. However, the fabrication of superoleophobic surfaces requires extremely low surface energy, which is achieved by introducing compounds with long fluorocarbon chains. However, these compounds are harmful to the environment. Herein, a mesh with superoleophobic/superhydrophilic properties was developed by coating a chemically etched copper mesh substrate with photopolymerized short fluorocarbon chains and water-insoluble hydrophilic monomers. This mesh can separate different types of oil-water mixtures with a separation efficiency of >99 %. The mesh demonstrated excellent underwater stability as well as chemical and mechanical durability. The water resistance and chemical durability of the mesh are stronger than those of the control copper mesh using metal ions and long fluorocarbon chains. Moreover, oil-water separation was achieved even after immersion in deionized water and salt, acid, and alkali solutions. In addition, the mesh preserves the ability of oil-water separation after being cleaned and reused for 10 times. The proposed superoleophobic/superhydrophilic mesh offers a solution for continuous oil-water separation and has prospects for developing anti-fouling/sweat-absorbing fabrics and self-cleaning surfaces.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Bionic Engineering
·
2022
·Vol. 20
·期 3
·900-909
·
IF 2.995
Zhong Xin,Guo Zhiguang
Oil–water mixing has brought many problems to a society, and it is of great significance to develop a simple, convenient, efficient, and durable separation material to solve the problem of oil–water mixing. In this paper, modified cottons were successfully prepared using polydopamine as the in situ mineralization site of TiO 2 nanoparticles combined with synergistic crosslinking with KH550. A large number of hydrophilic groups endowed the cotton with superhydrophilic ability, which greatly shortened its water spreading time. The prepared modified cotton could be successfully separated from oil and water, and still had a separation efficiency of 99.999% after 50 cycles. In addition, after 24 h immersion in 1 M HCl, NaOH, and NaCl solutions and 50 abrasion experiments, the modified cotton showed excellent oil–water separation ability, and the separation efficiency was above 99.990%. Successfully provided a simple preparation method to prepare high-efficiency and clean cottons for oil–water separation.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Advanced Materials Interfaces
·
2021
·Vol. 8
·期 17
·2100889
·
IF 6.147
Yeguang Zhang,Yong Qi,Shufen Zhang
Due to its high refractive index, photocatalytic activity, and photoinduced superhydrophilicity, TiO 2 has advantages in photonic crystals (PCs). However, the composite of TiO 2 and PCs needs to be calcined at high temperatures, and the structural stability of the composites is poor. In this study, photoinduced superhydrophilic TiO 2 –poly(hydroxyethyl acrylate)/polystyrene (PHEA/PS) PC composites with strong structural colors and self-cleaning are fabricated by coating triethanolamine-modified anatase TiO 2 nanoparticles-hydroxyethyl acrylate on the surface of PS PCs. The ordered arrays can be retained after the superficial layers of PS PCs are filled with TiO 2 –PHEA, and vivid blue, green, and red composites can be obtained. The water contact angles of the composites can be reduced to 3° in 0.4 s, and superhydrophilicity can be maintained for 180 days in a laboratory environment. The declining superhydrophilicity can be restored under UV irradiation. The composites can degrade the adsorbed methylene blue under UV irradiation. Photocatalytic activity and superhydrophilicity impart self-cleaning ability on the composites. The locking of PS arrays by TiO 2 –PHEA enhances the structural stability of the composites, making them resistant to water soaking and washing. Therefore, the composites show prospects for decoration, fabric coloring, and wearable electronic devices.
研究领域:
材料科学
·
纳米技术
·
光学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Zhu Xiong,Yongshi Huang,Zehui Huang,Yiwen Shi,Fangshu Qu,Gaosheng Zhang,Jingxin Yang,Shuaifei Zhao
Membrane surface fouling is often reversible as it can be mitigated by enhancing the crossflow shear force. However, membrane internal fouling is often irreversible and thus more challenging. In this study, we developed a new superhydrophilic poly(vinylidene fluoride) (P-PVDF) membrane confined with nano-Fe3O4 in the top skin layer via reverse filtration to reduce internal fouling. The surface of the P-PVDF membrane confined with nano-Fe3O4 had superwetting properties (water contact angle reaching 0° within 1 s), increased roughness (from 182 to 239 nm), and enhanced water affinity. The Fe3O4@P-PVDF membrane surface showed a thicker and enhanced hydration layer, which prevented foulants from approaching membrane surfaces and pores, thereby improving the rejection. For example, when 50 ppm humic acid (HA) solution was used as the feed, the removal efficiency of the Fe3O4@P-PVDF membrane was ∼67%, while the HA removal of the P-PVDF membrane was only ∼20%. The results from the resistance-in-series model showed that nanoconfinement of Fe3O4 in the top skin layer of the membrane allowed foulants to accumulate on the membrane surface (i.e., surface fouling) rather than within the internal pores (i.e., internal fouling). The filtration results under crossflow fouling and cleaning confirmed that the Fe3O4@P-PVDF membrane had higher surface fouling but it was much more reversible and much lower internal fouling compared with the control membrane. Our fouling analysis offers new insights into mass transfer mechanisms of the membrane with a nanoconfinement-enhanced hydration layer. This study provides an effective strategy to develop membranes with low internal fouling propensities.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xinxin Wei,Jing Zhang,Lei Wang,Yan Bai,Jingwei Huang,Houde She,Qizhao Wang
To address the issue of inefficient charge transfer efficiency at the semiconductor/cocatalyst interface, we engineered a BiVO 4 /MgO/FeCo 2 O 4 array, incorporating a MgO interlayer. This design aimed to enhance the performance of photoelectrochemical (PEC) water splitting on BiVO 4 and FeCo 2 O 4 . The introduced interlayer efficiently hinders hole backflow, promoting unimpeded charge migration within the multi-hybrid structure. This, in turn, significantly reduces the recombination of electron-hole pairs. In addition, the BiVO 4 /MgO/FeCo 2 O 4 undergoes a low-temperature plasma treatment, resulting in super-hydrophilicity. This treatment enhances charge migration efficiency and fosters extensive contact between the electrolyte and electrode interfaces. Photoelectrochemical analysis demonstrates that H-BiVO 4 /MgO/FeCo 2 O 4 exhibits exceptional performance for the oxygen evolution reaction (OER), showcasing a photocurrent density of 4.3 mA·cm −2 at 1.23 V vs. RHE in 0.5 M Na 2 SO 4 under AM 1.5 G (100 mW·cm −2 ) illumination. Remarkably, this value is 5.2 times higher than that observed for BiVO 4 . Furthermore, the maximum incident photon to current conversion efficiency (IPCE) reaches an impressive 61.7 %, surpassing that of BiVO 4 and BiVO 4 /FeCo 2 O 4 by approximately 5.1 and 1.7 times, respectively. Additionally, the charge separation efficiency of H-BiVO 4 /MgO/FeCo 2 O 4 achieves a notable 83.4 %, and the charge injection efficiency is substantially improved. This study advocates for a straightforward yet highly effective approach to mitigate interfacial electron-hole recombination.
研究领域:
材料科学
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能源科学
·
光催化
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产品关联
DOI
高影响因子
Small
·
2024
·
IF 13
Mingshuo Chen,Wei Sun,Hongtao Liu,Qiang Luo,Yining Wang,Jinmu Huan,Yongping Hou,Yongmei Zheng
Conventional fog collection efficiency is subject to the inherent inefficiencies of its three constituent steps: fog capture, coalescence, and transportation. This study presents a liquid bridge synergistic fog collection system (LSFCS) by synergistically utilizing a liquid bridge and interconnected porous superhydrophilic structures (IPHS). The results indicate that the introduction of liquid bridge not only greatly accelerates water droplet transportation, but also facilitates the IPHS in maintaining rough structures that realize stable and efficient fog capture. During fog collection, the lower section of the IPHS is covered by a water layer, however due to the effect of the liquid bridge, the upper section protrudes out, while covered by a connective thin water film that does not obscure the microstructures of the upper section. Under these conditions, a one-step fog collection mode is realized. Once captured by the IPHS, fog droplets immediately coalesce with the water film, and are simultaneously transported into a container under the effect of the liquid bridge. The LSFCS achieves a collection efficiency of 6.5 kg m −2 h −1 , 2.3 times that of a system without a liquid bridge. This study offers insight on improving fog collection efficiency, and holds promise for condensation water collection or droplet manipulation.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2012
·
IF 2.103
Cheng Jiang,Qihua Wang,Tingmei Wang
Thermoresponsive poly(N-isopropylacrylamide) (PNIPAAm) was grafted onto the cotton fabric by atom transfer radical polymerization (ATRP). Introducing 1H,1H,2H,2H-perfluorodecyltriethoxysilane (PFDTS) onto the surface, the density of PNIPAAm chains can be adjusted because of the competitive reactions of (3-aminopropyl) triethoxysilane (APS) and PFDTS. With the appropriate ratio of APS and PFDTS, the cotton fabric can be switched from superhydrophilic to superhydrophobic by controlling temperature. The prepared cotton fabric may find application in functional textiles, soft and folding superhydrophobic materials.
研究领域:
材料科学
·
纺织工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2019
·
IF 7.015
Zheng-Min Zhang,Zi-Qi Gan,Rui-Ying Bao,Kai Ke,Zheng-Ying Liu,Ming-Bo Yang,Wei Yang
Superhydrophilic materials have attracted extensive attention as promising candidates for effective oil/water separation and water purification , however, realizing environmentally friendly and multifunctional materials with superhydrophilicity and underwater superoleophobicity is still a great challenge and urgently desired. In this work, we develop a controllable approach to achieve the superhydrophilicity of biodegradable electrospun stereocomplex polylactide (sc-PLA) membranes via the titanium carboxylate coordination bonding of gallic acid (GA) and tetrabutyl titanate (Ti(OBu) 4 ) in aqueous solution, i.e. GA-modified TiO 2 (GA-TiO 2 ) coating. The GA-TiO 2 coated sc-PLA (GT-sc) membranes show superhydrophilicity and underwater superoleophobicity in various harsh working conditions including corrosive organic solvents , saturated NaCl solution and acid solution at pH = 1, exhibiting effective and efficient separation property for a wide range of oil/water mixtures and oil-in-water emulsions. The GT-sc membranes can remove water-soluble contaminants such as methylene blue driven by gravity, leading to multifunctional water purification. Moreover, the GT-sc membranes possess splendid antifouling and self-cleaning performance resulting from the photocatalytic property of TiO 2 under UV irradiation. Thus, this work provides an easily controlled route for fabricating green and durable membranes for multifunctional oil/water separation.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2024
·
IF 9.7
Qiuxian Li,Wenxuan Peng,Yue Sun,Chenchen Cai,Fangyuan Tang,Yongfei Liu,Qingdi Hu,Zheng Zhou,Xusheng Li,Shuangxi Nie
A cost-effective, and low-energy room-temperature cascade catalytic carbonization strategy is demonstrated for converting lignin into graphite with a high yield of 87 %, a high surface potential of −37 eV and super-hydrophilicity. This super-hydrophilic feature endows the lignin-derived graphite to be dispersed in a variety of polar solvents, which is important for its future applications. Encapsulating of liquid metals with the graphite for electrical circuit patterning on flexible substrates is also advocated. These written patterns show superb conductivity of 4.9 × 10 6 S/m, offering good performance stability and reliability while being repeatedly stretched, folded, twisted, and bent. This will offer new designs for flexible electronic devices, sensors, and biomedical devices.
研究领域:
材料科学
·
化学工程
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Feiran Li,Wenting Kong,Xuezeng Zhao,Yunlu Pan
Materials that possess distinguishable superwettability toward oil and water have aroused widespread attention for their application in oil–water separation. Among them, a superoleophobic/superhydrophilic material is considered as the ideal candidate because of its antioil-fouling and water-wetting behavior; however, the fabrication is a challenge and there has been insufficient attention given to multipurpose applications in treating intricate mixtures. Herein, for the first time, a multifunctional superoleophobic/superhydrophilic coating integrated with a photocatalysis property was fabricated by the combination of polarity component-enhanced fluorosurfactant and titanium dioxide (TiO2) nanoparticles. The coating applied on stainless steel mesh preserves the ability to separate immiscible oil–water mixtures, whereas the coated cotton preserves the ability to separate both surfactant-stabilized oil-in-water and water-in-oil emulsions. Notably, benefiting from the photocatalysis property of titanium dioxide, the coating also can be used in liquid purification. Contaminated oil can be separated and purified by a separation–purification process, during which the oil-soluble contamination is degraded under ultraviolet (UV) irradiation. The multipurpose coating provides an alternative solution for oil–water remediations, which has prospects in intricate liquid treatment in industrial and domestic applications.
研究领域:
材料科学
·
环境科学
✓ 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）