PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Xiaodan Gong,Haojie Yu,Li Wang,Jian Hu,Luming Wang,Chengjiang Li
Foggy surfaces can damage the optical performance of devices and even cause adverse consequences like safety concerns in some cases. Various antifogging coatings have been proposed to relieve this trouble. Nevertheless, most coatings suffer from temporary fog-repellency features due to hygroscopic swelling behavior and detachable interface. Herein, we reported an antifogging coating with persistent fogging prevention via the introduction of the amphiphilic polymer and interfacial layer. With the aid of benzophenone (BP) groups, both bulk crosslinking and interfacial bonding were achieved to prevent relatively macroscopic motions of coating from the substrate under extreme conditions. In virtue of the minor swelling and interfacial adhesion, the coating could preserve the fog-free behavior after 50-cycle antifogging tests and even aging for 90 days under harsh conditions. Notably, both in vitro (pig larynx) and vivo (living rabbit) outcomes indicated excellent fog-repellency of the polymer-coated endoscope.
研究领域:
材料科学
·
高分子化学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 9
·1570
·
IF 5.3
Weixuan Li,You Chen,Zhibin Jiao
Today, in the fields of optical precision instruments, medical devices, and automotive engineering, the demand for anti-reflection and anti-fog surfaces is growing rapidly. However, the anti-fog function often compromises the efficiency of the anti-reflection function. Therefore, optical precision instruments are always restricted by the inability to combine high anti-reflection efficiency and excellent anti-fog performance into one material. In addition, the synergistic mechanism of harmonizing anti-fogging and anti-reflection is currently unclear, which has a negative impact on the development and optimization of multifunctional surfaces. Herein, bio-inspired anti-fogging and anti-reflection surfaces (BFRSs) possessing multiscale hierarchical columnar structures (MHCS) were obtained using a brief and effective preparation technique, combining the biotemplating method and sol-gel method. Specifically, condensed fog droplets distributed on the BFRS can be absolutely removed within 6 s. In addition, the BFRSs endow the glass substrate with a relatively higher reflectance (17%) than flat glass surfaces (41%). Furthermore, we demonstrated the synergistic mechanism of the anti-fogging and anti-reflection functions of BFRSs. On the one hand, the high transparency benefits from the multiple refraction and scattering of light in the MHCS array. On the other hand, the excellent anti-fogging performance is attributed to the imbalance of the capillary force of the MHCS acting on the liquid film. The explanation for these two mechanisms provides more possibilities for the subsequent preparation of multifunctional surfaces. At the same time, the bionic research concept provides new solutions for the researcher to conquer the combination of high transmission and anti-fog properties for precision optical surfaces.Keywords:bio-inspired hierarchically-architectured surfaces;multiscale columnar structures;anti-fog;anti-reflection;synergistic mechanism of anti-fogging and anti-reflection
研究领域:
材料科学
·
光学工程
·
生物仿生学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Research Express
·
2021
·Vol. 8
·期 2
·025004
·
IF 1.62
Mengyuan Li,Zhiyang Zhao,Xianli Fang,Zefeng Zhang,Min Deng
CsxWO3-ZnO-SiO2 smart coatings were proposed to achieve multiple functions, such as thermal insulation, anti-dust, anti-fogging and blocking harmful ultraviolet light, etc. The transparent hydrophobic hybrid resins were prepared from methyltriethoxysilane (MTES) and SiO2 sol, which was used as the substrate of the composite coating. The CsxWO3 is served as the near-infrared (NIR) absorber, and the ZnO is functioned as the ultraviolet (UV) blocking agent. Coatings with different ratios of CsxWO3 and ZnO were successfully prepared by co-blending with nano-SiO2 resin. The morphology, microstructure, surface composition, hydrophobicity, thermal stability, anti-dust and optical property of the composite coatings were investigated comprehensively. The transmittance of C10Z10 (CsxWO3 10%, ZnO 10%, nano-SiO2 resin 80%) coating at 370 nm is 2.3%, and the value of Solar Energy Transmittance Selectivity (SETS) is 0.665, which exhibits excellent NIR shielding ability. Compared with nano-SiO2 resin coating, the thermal insulation temperature difference can reach 7.0 °C. The C10Z10 coating showed good durability in the twenty times anti-dust repeated tests and the efficiency could maintain 70.3% after the repeating tests. The coating showed excellent sustainability after a 45-day outdoor exposure experiment and a 240 h of artificial accelerated aging experiment. Thus, the proposed CsxWO3-ZnO-SiO2 coatings are promising for outdoor smart windows.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 13
·期 1
·86
·
IF 5.719
Lie Wu,Yihong Kang,Yuhao Deng,Fan Yang,Rui He,Xue-Feng Yu
The antifogging coating based on super-hydrophilic polymer is regarded as the most promising strategy to avoid fogging but suffers from short-term effectiveness due to antifogging failure induced by water invasion. In this study, a black phosphorus nanosheets (BPs) hybrid polymer hetero-network coating (PUA/PAHS/BPs HN) was prepared by UV curing for the first time to achieve long-term antifogging performance. The polymer hetero-network (HN) structure was composed of two novel cross-linked acrylic resin and polyurethane acrylate. Different from physical blending, a covalent P-C bond between BPs and polymer is generated by UV initiated free radical reaction, resulting in BPs firmly embedded in the polymer HN structure. The BPs enriched on the coating surface by UV regulating migration prevent permeation of water towards the inside of the coating through its own good water-based lubricity and water absorption capacity. Compared with the nonhybrid polymer HN, PUA/PAHS/BPs HN not only has higher hardness and better friction resistance properties, but also exhibits superior water resistance and longer antifogging duration. Since water invasion was greatly reduced by BPs, the PUA/PAHS/BPs HN coating maintained antifogging duration for 60 min under a 60 °C water vapor test and still maintained long-term antifogging performance after being immersed in water for 5 days.Keywords:black phosphorus;hybrid;polymer;hetero-network;coating;long-term antifogging
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Hong Zhao,Yuqi Yang,Man Zhou,Lihui Xu,Hong Pan,Qun Yang,Zaisheng Cai
Anti-fog glass can solve the safety problems caused by glass fogging in a wide range of applications. However, its durability is still insufficient under actual application conditions such as high humidity, friction and scratches, et al. Therefore, this work copolymerised hydrophilic chain segments N-hydroxyethyl acrylamide (HEAA) containing -OH and water-resistant -NH-CO-, hydrophobic chain segments butyl acrylate (BA) and a “bridging agent” 4-benzoylphenyl acrylate (BPA) into a trimeric anti-fog coating. And, -OH was introduced to the glass surface by a simple plasma treatment. The BPA was covalently linked with hydrophilic and hydrophobic polymers HEAA/BA through a free-radical polymerisation reaction of double-bonded to form a covalent carbon chain. Meanwhile, it covalently combined with the -OH on the glass surface. BPA formed a stable link between the anti-fog coating and the glass substrate. Thus, the coating was resistant to 400 cycles of sand abrasions and can lift up to 1500 g. The -NH-CO- in HEAA and BA significantly increased the water resistance of the coating which can be immersed in water for 120 h. The -OH in HEAA not only given the coating excellent anti-fogging properties, but also enabled it to self-heal quickly within 10 s. The durable anti-fog coatings prepared in this work have great potential for practical applications.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Keda Jiang,Zhihua Yang,Yifan Luo,Xiaohang Xue,Feiran Li,Bharat Bhushan,Yunlu Pan,Yanqiang Huo,Xuezeng Zhao,Libo Li,Jun Wei,Wenxin Cao
Ecofriendly fabrication of anti-oil-fouling materials is of interest. Surfaces with underwater superoleophobicity have been fabricated which exhibit limited mechanical durability and water resistance. In this study, we report on a bioinspired bilayer design of a transparent anti-oil-fouling coating. Seaweed surfaces show anti-oil-fouling in the sea due to its high surface hydration ability. Mussels can adhere tightly onto a surface with good stability in the sea by virtue of its levodopa-containing secretions. The surface layer was fabricated using a crosslinked combination of carboxymethyl cellulose (CMC) and sodium alginate (AlgS) inspired by seaweed, with the addition of calcium ions. Polydopamine (PDA), a derivative of levodopa, was used as the underlayer to enhance bonding strength and water resistance. Oil that adhered to the coated surface was spontaneously detached upon immersion in water. The mechanism underlying this anti-oil-fouling effect was elucidated using Gibbs free energy theory. The coating exhibited mechanical durability and water resistance. The coating is transparent and preserves the original color of the substrate. The coated glass showed stable anti-fogging and anti-frost performance. These coatings hold promise for a wide range of anti-oil-fouling applications.
研究领域:
材料科学
·
生物仿生学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yan Cheng,Feng Feng,Tianxue Zhu,Yanhui Zheng,Yukui Gou,Dapeng Yang,Jianying Huang,Yuekun Lai,Zhongyi Jiang
In recent years, the demand for transparent substrates (e.g. windows, mirrors and photovoltaic glass) with anti-fogging performances has increased, while conventional anti-fogging coatings, like single-component organic coatings (PVA, PAA, PAAm), show poor stability and cannot maintain their performance stably under harsh environments. In this work, KH570@TiO 2 plays the role of a bottom layer (KT coating) to increase roughness and binding, where the hydrolysis of KH570 anchors the substrate and provides active sites for the binding of the top coating, and the addition of the TiO 2 enhances UV shielding properties. A composite PVA-AAm-POSS-NH 2 gel (PAP coating) served as the top layer, which contains a large number of hydrophilic groups and thus endow the composite coating with satisfactory anti-fogging performance. The strong bonding force provided by the KT coating and the tight physical entanglement of the PAP coating endow the double-layer coating (PAPKT coating) stable anti-fogging performance (60 times of tape peeling test, 100 times of sandpaper friction test, and sand-punching test), and 48 s icing delay performance. The multi-performances make this work great potential in automotive glass as well as building facades to cope with complex situations.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Advanced Materials Technologies
·
2021
·Vol. 6
·期 7
·2001267
·
IF 7.848
Yonggan Yan,Jiuyu Cui,Xiaoyong Qiu,Hanlian Liu,Xiang Liu,Peng Yao,Jun Huang,Xin Cui,Xiubing Liang,Chuanzhen Huang
Hydrogel coatings have drawn substantial research interest owing to their great potential in developing advanced flexible devices. However, most of them cannot meet the requirement of large-scale application on diverse substrates and would lose their functionalities under harsh conditions. In this work, a large-scale and surface-independent multifunctional hydrogel coating is developed by directly painting and ultraviolet curing hybrid hydrogel precursor containing acrylamide (AM), branched polyethylenimine (PEI), CaCl 2 , and glycerol. Such a coating shows superior anti-fog and anti-frost properties owing to the hydrophilic nature and freezing-tolerance of the hydrogel. Besides, the hydrogel coating possesses excellent self-healing performance at both macro- and micro- scales because of the dynamic hydrogen bonds prevailing between the polymer chains in a gel network. Moreover, this hydrogel coating also exhibits electric conductivity due to the mobile ions present in the gel network. By patterning the hydrogel coating onto an elastic substrate, a foldable tape sensor is fabricated which can sensitively distinguish short-time click (≈0.1–0.2 s) from long-time press (≈1–2 s) and detect electrical signals corresponding to cyclic bending deformation. This work provides practical demonstration of hydrogel coatings for engineering applications where anti-fog, anti-frosting, self-healing, and electrically conductive properties are needed.
研究领域:
材料科学
·
表面工程
·
智能材料
✓ 已验证
DOI
高影响因子
Polymers
·
2018
·Vol. 10
·期 12
·1362
·
IF 2.935
Bo Xu,Yuwei Liu,Jiugang Yuan,Ping Wang,Qiang Wang
Hydrogels with outstanding mechanical performance, self-healing capacity, and special functionality are highly desirable for their practical applications. However, it remains a great challenge to achieve such hydrogels by a facile approach. Here, we report a new type of nanocomposite hydrogels by in situ copolymerization of acrylic acid (AA) and 2-acrylamido-2-methylpropane sulfonic acid (AMPS) using alumina nanoparticles (Al2O3NPs) as the cross-linkers. The obtained hydrogels are highly stretchable and compressible, which could sustain large-scale extension (>1700%) or compression (90%) without failure, and exhibit tensile and compressive strength up to 660 kPa and 8.3 MPa, respectively. Furthermore, this kind of hydrogel also display considerable self-healing capacity due to their noncovalent cross-linking mechanism, as well as the hydrogen-bonding interactions between polymer chains. More interestingly, it was found that the resultant gels possess a long-lasting antifogging property that could prevent the formation of fog on the glass plate above hot water for at least 90 min. It is expected that this novel type of hydrogel would show great promise for various applications, including soft robots, artificial muscles, and optical devices.Keywords:nanocomposite hydrogels;Al2O3;high-strength;self-healing;antifogging
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Honglang Lu,Huanxiong Liang,Jianle Liu,Hui Zhou,Menghan Pi,Min Li,Bin Yan,Wei Li,Wei Cui,Rong Ran
Fogging prevention and environmental monitoring in a greenhouse are usually accomplished by different components, as the former relies on persistent surface-wetting capability, while the latter requires conductivity or capacitance to vary with ambient conditions. Combining these seemingly unrelated functions presents a significant challenge. Here, we report an all-in-one hydrogel that integrates these exclusive functions, enabling it to simultaneously work as an anti-fogging coating and environmental monitor in greenhouses. The strategy involves constructing loosely crosslinked hydrophilic networks enriched with abundant free ions and a specific amount of glycerol. The transparent hydrogel, composed of long-chain polymers, exhibits excellent adhesion to the inner surface of the greenhouse film and significantly decreases its water contact angle by filmwise condensation, thereby reinforcing the anti-fogging properties of the film without sacrificing its transparency. Meanwhile, the presence of glycerol and free ions enables the gel to sustain a wide range of temperature and humidity while displaying environmentally sensitive conductivity, endowing the gel with the same function as conventional rigid environmental sensors. As a proof-of-concept demonstration, a wireless indoor environmental monitoring system in a homemade lean-to greenhouse is established by utilizing hydrogel as the sensing module, which also performs well in prohibiting fogging on the greenhouse film. We hope this work could provide some inspiration for the development of multifunctional intelligent greenhouse films.
研究领域:
材料科学
·
农业技术
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Ziyang Gong,Xuefeng Gui,Yihao Yang,Weile Li,Jiwen Hu,Daguang He,Xiaohua Cui,Yuanyuan Tu
Liquid polysiloxanes are prone to misting in coating processes performed at high roller speeds, and the addition of anti-misting agents is a cost-effective method to address this issue. In this work, a series of mildly cross-linked fluorinated polysiloxane-based viscoelastic fluids were synthetized via the successive hydrosilylation of (perfluorohexyl) ethylene (PFHE) and vinyl-terminated polydimethylsiloxane (PDMS-Vi) with hydride-terminated polydimethylsiloxane (PMHS). As anti-misting agents for high-speed coating process of silicone release agents, their inhibition efficiency can reach 92.1 % with a dosage of 4 wt%. It was also found that the physical properties, rheology, and molecular structure of the agents have various influences on inhibition efficiency depending on the anti-misting mechanisms. Additionally, the agents could significantly reduce the negative impact of coatings, and have no obvious adverse effect on the heat curing process or the transparency. The transparency of the films on the surface of the underlying polyethylene terephthalate (PET) substrate is still in excess of 95 %. Finally, the agents are conducive to improving the thermal stability of the films, and the results show that this type of viscoelastic fluids has the potential to be used in the industrial production of silicone release coatings.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2017
·Vol. 33
·期 1
·150-154
·
IF 1.024
Jiang Yuhang,Li Yao,Wang Xuesong,Piao Linglan,Shi Zuosen,Cui Zhanchen
A new and effective organic-inorganic hybrid hydrophilic anti-fog coating was proposed and prepared. As is well-known, the presence of an inorganic component typically decreases the hydrophilicity and transparency of the coating. To solve this problem, we used polyethylene glycol with two different molecular weights to modify the si-lane coupling agent and mixed it with hydrophilic copolymer to form coating formulas. We coated these formulas on polycarbonate(PC) substrates to measure the anti-fogging properties via contact angle and anti-fogging tests, com-pared their transparency properties using UV-Vis spectra and evaluated the hardness using a pencil hardness tester. The results demonstrate that the molecular weight of PEG has a strong influence on the properties of the anti-fog coatings. After the corresponding optimization, we manufactured an excellent anti-fog coating. In addition to good adhesion and hardness, the coating also exhibited excellent mechanical properties, optical transparency and perfect anti-fogging performance.
研究领域:
材料科学
·
表面化学
✓ 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）