Advanced Materials Interfaces
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2026
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IF 4.5
Mei Liu,Shuyao Li,Xiangyu Chen
This study proposes a membrane based on a thermally driven molecular conformation switch, which can precisely control the flow rate of water droplets. This material achieves programmable control of droplet movement at the solid-liquid interface through temperature-induced molecular conformational changes. This material constructs a regional self-assembly structure on the polydimethylsiloxane substrate, enabling reversible changes in droplet adhesion and sliding speeds at different temperatures. Among them, Trichloro(1H,1H,2H,2H-tridecafluoro-n-octyl)silane exhibits charge transfer rates of 0.06 nC/s at 20°C and 3.97 nC/s at 70°C, with a rate increase of 651% due to the degree of molecular chain bending. On this basis, self-assembled molecular layers of different regions can be constructed on the same membrane, and the water flow rate can be actively controlled according to the temperature. The chemical stability of the self-assembled membrane was confirmed by atomic force microscopy and X-ray photoelectron spectroscopy characterization. Based on this principle, eight series of molecular chain charge transfer rates of different lengths and elements were evaluated simultaneously. A programmable model cooling system was designed, which drives the movement of liquid droplets through electro-adhesion, significantly improving the local heat exchange efficiency. This research provides new design strategies and theoretical foundations for thermal management and adaptive microfluidic systems.
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DOI
高影响因子
Journal of Water Process Engineering
·
2023
·
IF 7
Zaichao Guo,Yujing Wang,Zhihao Liang,Zhenhua Zhang,Jianjun Xie,Xiaoyu Gui,Borui Hou,Dan Mo,Liang Lu,Huijun Yao
Due to the increase in oil spills and the high organic contamination of the marine environment, it is necessary to develop an oil/water separation technology with low cost and high efficiency. Membrane separation technology has been proven to be an important technology used in the oil/water separation area. Herein, PET ion track-etched membranes with channel sizes of 310 nm, 650 nm, 1050 nm, and 1950 nm were hydrophobically modified by chemical grafting using propyltrichlorosilane and o-xylene as modifier and solvent, respectively. The modified PET ion track-etched membranes were found to exhibit a maximum water contact angle of 140.81° and possessed excellent hydrophobic property with modifying conditions of 80 mM modifier and 24 h modification time. It demonstrated the grafted propyl groups on the PET ion track-etched membrane played a key role in the increase of hydrophobic property. After modification, the PET ion track etched membrane had a high oil/water separation ratio of 99.87% and a flux of 12,158.24 L/m 2 ·h with good running stability. This work provided a cost-effective and facile approach to distinctly improve the ion track-etched membrane performance on durable oil/water separation.
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DOI
高影响因子
ACS Nano
·
2023
·
IF 17.1
Yufen Li,Xiaofeng Liu,Ruijie Wang,Shouzheng Jiao,Yuyan Liu,Hua Lai,Zhongjun Cheng
Smart adhesives with switchable adhesion have attracted considerable attention for their potential applications in sensors, soft grippers, and robots. In particular, surfaces with controlled adhesion to both solids and liquids have received more attention, because of their wider range of applications. However, surfaces that exhibit controllable adhesion to both solids and liquids often cannot provide sufficient adhesion strength for strong solid adhesion. To overcome this limitation, this study developed a triple-bioinspired shape memory smart adhesive, drawing inspiration from the adhesion structures found in octopus suckers, lotus leaves, and creepers. Our adhesive design incorporates microcavities formed by a shape memory polymer (SMP), which can transition between rubbery and glassy states in response to temperature changes. By leveraging the shape memory effect and the rubber–glass (R-G) phase transition of the SMP, the adhesion of the surface to smooth solids, rough solids, and water droplets could be switched by adjusting the temperature and applied force. Notably, the adhesives designed herein exhibited high adhesion strength (up to 420 kPa) on solids, facilitated by the shape interlocking effect and the negative pressure generated within the microcavities. Furthermore, the programmable transport of solids and liquids can be achieved by utilizing this switchable adhesion. This approach expands the possibilities for designing smart adhesives and holds potential for various applications in different fields.
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DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Dong Wang,Lihong Gao,Zhuang Ma,Xinchun Tian
Unique pattern morphologies created by surface instability are a versatile platform for controlling surface functionality. In this work, simultaneous surface wrinkling and hydrophobization of organic coatings by directly reacting with diffused propyl trichlorosilane (PTCS) from gas phase was demonstrated. By varying the initial coating type, various surface morphologies were obtained, showing different interactions with water droplets, demonstrating the high tunability of the method to achieve important surface functions, including rose petal and lotus effects. It was found that reaction between the absorbed water in the coating caused the hydrolysis of PTCS and their subsequent self-condensation to form siloxanes within the coating, which contributed to the large volume expansion and eventually triggered the wrinkling process. This method is independent of the substrate type and offers a great advantage in producing functional coatings using eco-friendly, VOC-free solutions.
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DOI
高影响因子
Small
·
2025
·
IF 12.1
Hongyang Ma,Chao Wu,Haoxiang Ma,Xiaofeng Liu,Teng Ma,Zhenmeng Xia,Xu Liu,Xu Zhang,Haiyang Zhang,Zhongjun Cheng,Yuyan Liu
Octopus-inspired smart adhesives have exhibited remarkable application prospects in domains including soft grippers and medical monitoring. Nonetheless, existing bioinspired adhesives still exhibit a notable gap in adhesion strength compared to living tissues due to the uncontrollable stiffness, especially when adhering to uneven surfaces. In this study, shape memory polymer (SMP) is utilized with photothermal conversion properties to mimic the characteristics of octopus tentacle suckers and muscles, proposing a photoresponsive smart adhesive (PSA) with adjustable stiffness. Leveraging the shape memory performance of the SMP, this smart adhesive is capable of regulating its own stiffness to achieve conformal contact, shape locking, and active release. Moreover, owing to its hydrophobic property, this smart adhesive is not only suitable for manipulating surfaces with various features in air but also capable of functioning effectively in underwater environments. The adhesive proposed in this paper can achieve solid adhesion strengths ≈18-fold and 11-fold higher than traditional octopus-inspired adhesives in air and underwater environments, respectively, further enhancing the attachment and detachment functions. It holds great application potential in industrial production lines and daily life, opening up a brand-new direction for the development of adhesive materials.
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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）