Cell Reports Physical Science
·
2021
·
IF 0
Weihong Li,Chongjia Lin,Wei Ma,Yang Li,Fuqiang Chu,Baoling Huang,Shuhuai Yao
Surface fogging reduces light transmission of optically clear materials and causes various problems in daily life. Transparent photothermal materials have recently emerged as an eco-friendly and sustainable solution to surface fogging. However, most reported photothermal materials only exploited the broadband spectrum of solar energy, and the spectral feature has yet to be tuned to optimize the visibility and photothermal effect simultaneously. Here, we develop a highly transparent, photothermally selective coating, based on solution-processed cesium-doped tungsten trioxide nanoparticles. The transparent selective photothermal coating provides a visible transmittance up to 82% and a high absorption of ultraviolet and near-infrared light >90%, and achieves a temperature increase by 38°C under 1-sun illumination, resulting in remarkable antifogging and defogging abilities under extremely frigid or humid conditions. Large-scale complex surfaces with photothermal coatings are deployed in field antifogging tests as well as long-term durability tests, showing their great potential in antifogging applications.
研究领域:
材料科学
·
能源科学
·
光学工程
✓ 已验证
DOI
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Hui Liu,Xiaoqin Wang,Huan Luo,Jianying Huang,Jiajun Mao,Zhong Chen,Yuekun Lai
Transparent substrates are frequently employed in a wide range of optical applications, such as eyeglasses, displays, and sensors. While these substrates should have superior optical qualities, they often encounter a number of problems including excessive fogging and surface contamination. Hydrogel is a good candidate for anti-fogging coating, however, its poor bonding with the substrates and high tendency of water loss have hindered its development. In this work, we have developed a dual-layered anti-fogging polyacrylamide (AAm1 + 2)@hydrogel coating on a variety of substrates by spin-coating technique with the inner layer (AAm1) chemically bonded to the substrates and retaining water for a long time and the outer layer (AAm2) wear-resistant to the external environment. This transparent hydrophilic hydrogel coating possessed a contact angle (CA) less than 90° and the same light transmittance as that of a bare glass. Besides, the coating can also successfully keep the fog away from obscuring the view through the cambered eyeglass lenses. The bio-inspired AAm1 + 2@ anti-fogging coating has demonstrated prolonged anti-fogging duration over a wide temperature range for repeated uses. Under normal use circumstances, the outer AAm2 layer can prevent scratch or abrasion damage. The coating was also extremely effective in decreasing ice adhesion and resisting fouling from oil contamination. This coating has offered lots of potential for use in numerous practical applications due to its variety of desired features that have been demonstrated and its straightforward production procedure.
研究领域:
材料科学
·
生物仿生学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Yingying Dou,Chengjiao Wu,Yue Fan,Yingke Wang,Zhe Sun,Shilin Huang,Yabin Yang,Xuelin Tian
Transparent protective coatings capable of preventing fog and dust accumulation have broad application prospect in photovoltaic systems , optical devices and consumer electronics. Although a number of superhydrophobic coatings have been developed for self-cleaning purpose over the past three decades, there is still a lack of surfaces that can simultaneously possess high transparency, remarkable superhydrophobicity, and excellent fog and dust resistance. In this study, we have prepared surfaces featuring sub-wavelength nanofiber cluster structures through a facile plasma etching method, and further modified the surface with liquid-like perfluoropolyether (PFPE) brushes. The prepared PFPE modified nanofibrous surface (PFPE-NS) exhibits superior optical transparency (transmittance 90.4 % ± 0.7 %) and water repellency , with a water contact angle as high as 171.0° ± 0.6° and sliding angle down to 0.5° ± 0.1° (5 µL). More importantly, benefitted from the nanofiber cluster structures and the slippery liquid-like surface chemistry, the adhesion and accumulation of fog droplets and dust particles on PFPE-NS is greatly inhibited. As a consequence, PFPE-NS can keep excellent optical clearness after 2 h fogging test and maintain an average transmittance above 87 % after 24 h dusting test. Our study provides a promising strategy through constructing liquid-like nanofibrous coating for optical protection that could be applicable in practical rainy, foggy, and dusty environments.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
Food Packaging and Shelf Life
·
2024
·
IF 8.5
Jia Sha,Cheng Zuxin,Liang Zhu,Kaijun Xiao
The modified atmosphere and antifogging packaging membranes were developed by blending threonine-grafted phosphorylated polyvinyl alcohol (EPT) with polyester-based thermoplastic polyurethane (TPU) via a convenient and eco-friendly blade coating method. EPT/TPU membranes containing 1% EPT demonstrated outstanding gas and moisture permeability, effectively reducing postharvest kiwifruits' respiratory activity. The CO 2 /O 2 separation coefficient and moisture permeability of EPT/TPU membranes reached 8.20 and 133.32 g/(m 2 ⸱24 h), respectively. Additionally, the antifogging property was attributed to a significant drop in water contact angle from 83.3° for TPU to 7° for EPT/TPU membranes. These properties contributed to maintaining a favorable atmosphere inside the package (5.3%−5.7% CO 2 and 15.6%−16.0% O 2 ) and removing moisture in time to prevent fogging, thus providing an ideal storage environment for kiwifruits and slowing down the quality deterioration. EPT/TPU membranes also had excellent mechanical properties. This modified atmosphere and antifogging membranes had broad prospects for fruit and vegetable preservation.
研究领域:
食品科学
·
材料科学
·
植物学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2019
·
IF 0
Tao Zhang,Qiuyan Yu,Lanlan Fang,Jiajun Wang,Tao Wu,Pingan Song
Poly(lactic acid) (PLA) has been increasingly employed as a promising packaging material. Unfortunately, PLA film suffers low oxygen barrier and poor antifogging issues, which extremely restrict its practical applications. Despite some progress, to date it remains a challenge to construct a biodegradable, transparent, highly oxygen-barriered and antifogging coating for the PLA film via a facile approach. Here, we report a facile construction of biodegradable and all-organic coating with high transparency via hydrogen-bonded layer-by-layer assembly of poly(vinyl alcohol) (PVA) and tannic acid (TA). With the presence of 20 bilayers of PVA and TA, the oxygen permeability is reduced to 0.52 × 10–16 cm3·cm/[cm2·s·Pa], approximately 450 times lower than that of PLA film. Moreover, fogging issue for PLA film can be effectively addressed only with five bilayers of PVA and TA. These improvements are attributed to the hydrogen-bonding interactions and polyphenol groups within the multilayer coating. This work may provide a facile strategy for the design of biodegradable and highly transparent coating for the high oxygen barrier and antifogging applications by using organic molecules as building blocks.
研究领域:
材料科学
·
包装工程
·
生物降解材料
✓ 已验证
产品关联
DOI
GREEN CHEMISTRY
·
2019
·Vol. 21
·期 19
·5405-5413
·
IF 9.405
Tao Zhang,Lanlan Fang,Nan Lin,Jiajun Wang,Yongguang Wang,Tao Wu,Pingan Song
The development of environmentally benign, transparent, durable, and healable anti-fogging coating is vital for automobile windshields and food packaging in our daily production and life. The fabrication of existing anti-fogging coatings is often time-consuming in addition to potential toxicity issues. Here, we have reported a highly transparent and healable anti-fogging coating on the surface of poly(ethylene terephthalate) (PET) film by using bioderived pectin and tannic acid (TA) via a facile dip-coating method. The results show that the pectin/TA composite coating endows the PET film with excellent anti-fogging property without sacrificing the transparency of the PET films. This coating can maintain exceptional anti-fogging capabilities in both hot-vapor and cold-warm conditions. In addition, such anti-fogging coatings also exhibit good durability as the anti-fogging capability can be well-retained even after spray rinsing 5 times with high-speed water faucet. Moreover, the scratches or cuts on the coating can be completely healed within 4 minutes of triggering with water. The study provides an innovative methodology for the design of highly transparent, durable, and healable anti-fogging coatings, and offers promising value-added utilization of abundant and renewable biomass.
研究领域:
材料科学
·
环境科学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Wanshun Deng,Gang Wang,Lei Tang,Zhixiang Zeng,Tianhui Ren
Hypothesis Transparent superhydrophilic coatings are very promising in various scenarios. Appropriate fabrication of colloid coatings with superhydrophilicity both in air and under oil would enlarge their application potential in anti-oil fouling and facilitate anti-fogging of transparent surfaces. Experiments The Barite colloid was obtained from a one-step precipitation method and was transferred onto glasses to prepare transparent coatings with different thicknesses simply by dip-coating. Then, the impact of thickness on wettability and property was studied through the investigation of wettability in various phase, anti-crude oil fouling performance and anti-fogging ability. Findings Similar surface morphology and roughness of these coatings were achieved and all the coated surfaces showed ultra-hydrophilicity both in air and under oil. Moreover, the hydrophilicity in air and under oil was found to deteriorate with the decrease of coatings’ thickness and dual superhydrophilicity could be achieved on thick coatings. More importantly, excellent anti-crude oil fouling property and durable anti-fogging ability were realized on these transparent coatings with dual superhydrophilicity.
研究领域:
材料科学
·
表面化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2024
·
IF 5.8
Jinyue Ma,Xiuxian Gu,Junhui He
Hygroscopic polymers are good candidates for antifogging coatings, but their long-term effectiveness is limited by the equilibrium between water absorption and expansion. As an efficient and environmentally friendly solution, photothermal materials are being introduced into the field of antifogging. However, there is a need for enhancement in the spectral characteristics of most photothermal materials within the visible light region. In addition, photothermal antifogging coatings often exhibit a delay in heating response, which hinders their ability to promptly evaporate condensed water droplets in the absence of illumination or during initial illumination. Here, a bilayer structure design of photothermal nanomaterials/hygroscopic polymers is proposed to achieve long-term antifogging under sunlight activation. Ensuring the rapid absorption of condensed water droplets on the coating surface, while simultaneously achieving efficient photothermal conversion for a swift temperature increase over the entire coating, is key to this approach, which will not only suppress early fogging but also lead to an exponential decrease of the nucleation rate of droplets. During this process, a dynamic equilibrium is gradually established between the condensation and evaporation of fog droplets, leading to long-term antifogging properties. The light transmittance of the composite coatings reaches as high as ca. 75% in the visible light region, making them well suited for a diverse range of transparent substrate and device applications. A clear field of view can be maintained for at least 6 h under 1 sun illumination above 65 °C hot steam. The antifogging/defogging performance is effectively demonstrated even under challenging non-ideal natural conditions, such as low solar irradiation during dusk or when placed indoors behind windows.
研究领域:
材料科学
·
光学
·
表面工程
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2025
·Vol. 32
·期 2
·1-13
·
IF 2.8
Zhang Song,Chen Zhang,Gao Yanfeng
Fogging on agricultural greenhouse covering films reduces solar transmission, resulting in insufficient photosynthetically active radiation and hindering crop growth. In this study, a long-acting antifogging composite film was developed by incorporating diatomite (DE) and sorbitan tristearate (STS) into low-density polyethylene (LDPE). The introduction of STS enabled the surface of LDPE to undergo a transition from hydrophobic to hydrophilic. The film has the ability of preventing fogging and increasing solar irradiation inside the greenhouse by 15%. On the 30th day of the hot fog test, the failure area of the film was only 20%, and the introduction of DE reduced the diffusion coefficient of STS from 0.2 to 0.06 cm 2 min −1 . Rheological properties and crystallinity testing revealed the interaction mechanism between STS and LDPE molecules. Greenhouse cultivation experiments showed that the chlorophyll content of Chinese cabbage ( Brassica rapa ssp. chinensis ) and spinach ( Spinacia oleracea ) grown under the antifogging film increased by 24% and 30%, respectively. This antifogging film can be produced on a large scale using the casting method and offers significant potential for improving the quality of greenhouse crops.
研究领域:
农业科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Longlong Zeng,Xiaoyan Li,Yinjie Chen,Haiping Yu,Zaisheng Cai
Anti-fogging is crucial to applications in harsh cold environment, for which ensuring the clear sight for people and the accuracy of certain precise instruments. Although there have been some studies on frost-resistant coatings in recent years, the duration of their anti-fogging under frost conditions is not long, and the complexity of the preparation process also makes it difficult to put them into practical use. In this paper, anti-fog coatings with good anti-fog and durability properties are prepared in a one-step process using hydroxy propyl methyl cellulose (HPMC), hydroxy ethyl cellulose (HEC), and anhydrous ferric chloride (FeCl 3 ) as materials. The raw materials of the coating and the preparation process are green and environmentally friendly. The light transmittance of the coated glass can exceed 90 % under the harsh fogging environment. The hydrogen-bond effects impart the anti-fogging coating durability for continuous anti-fogging under harsh environments, such as 3000 cycles fabric abrasion and one-year-long term frosting at −20 °C. The presented anti-fogging strategy can be used in daily scenarios and have great application prospects in severe cold environments.
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
PROGRESS IN ORGANIC COATINGS
·
2018
·
IF 2.955
Yunjiao Gu,Hongyu Liu,Jinglong Yang,Shuxue Zhou
The competing constraints, associated with different features such as wettability, optical transparency, anti-reflectivity, and anti-fouling properties, set back the progress of developing multi-functional coatings in an easily-accessible manner. Herein, polyvinyl alcohol (PVA)/SiO 2 coatings with combined reflection-reducing, anti-fogging, and underwater contamination-reducing performances were successfully fabricated from the immersion-curing process assisted with ultrasonic dispersion of silica nanoparticles (NPs). The effects of SiO 2 dispersion method, thickness and SiO 2 particle size on surface properties were systematically investigated. The designed two-stage process was underlined for the first time to be pivotal, during which the initial ultrasonic dispersion rendered the coating transparent, while immersion-curing further repressed its surface reflection. Coexistence of high hydrophilicity with high transmittance has been realized in the as-prepared coatings containing highly-dispersed fumed silica A200 NPs, resulting in a multi-functional surface equipped with anti-fogging, anti-reflection, self-cleaning and underwater anti-fouling properties. Additionally introducing bi-component acrylic polyurethane basecoat, the PVA/SiO 2 coatings were applicable on diverse substrates, including fragile ones.
研究领域:
材料科学
·
表面工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2022
·
IF 6.206
Yuxin Cheng,Liming Tang,Xiaohui Fu
In this study, a series of silica sol modified polyurethane composite emulsions were fabricated via incorporating silica sol precursor into anionic silanol-terminated polyurethane emulsion, which was obtained via three steps, including (1) reacting excess hexamethylene diisocyanate (HDI) with polybutylene glycol (PBG), 2,2-dimethylhydroxypropionic acid (DMPA), bis(2-hydroxyethyl) disulfide (HEDS) in a stepwise process using dibutyltin diacetate (DBTA) as the catalyst, (2) neutralizing the resulting prepolymer with triethylamine and end-capping with 3-aminopropyltriethoxysilane (APTES), and (3) dispersing the resulting silanol-terminated polyurethane in water under stirring. The reaction products were characterized by fourier transform infrared (FT-IR) spectroscopy, hydrogen proton nuclear magnetic resonance ( 1 H NMR) spectroscopy, Raman spectroscopy and permeation gel chromatography (GPC). The swelling degree and gel content analysis confirmed the formation of crosslinking network in the composite coatings formed after drying the composite emulsions. The self-healing performances of the coatings were investigated by differential scanning calorimetry (DSC), dynamic thermomechanical analysis (DMA), scanning electron microscopy (SEM) and tensile mechanical tests, and the anti-fogging and anti-frosting behaviors of the composite coatings were analyzed by UV–visible spectroscopy, reflectance spectroscopy, water contact angle test and optical photometry. Based on the measurements, the self-healing process, the anti-fogging and anti-frosting mechanism were discussed. At suitable amount of HEDS, this coating exhibited excellent self-healing performances with the self-healing efficiency up to 95.9 % because of the high moving ability of the chains. After self-healing, these coatings displayed the same anti-fogging and anti-frosting properties as those before self-healing. The silica sol component was found to increasing both the polar groups and crosslinking degree, endowing the composite coating with durable anti-fogging and anti-frosting properties.
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
危险品化学品经营许可证（带存储）