BIORESOURCE TECHNOLOGY
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2022
·
IF 11.889
Jianping Fan,Fangfang Li,Dexin Fang,Quanzhou Chen,Qingkong Chen,Huan Wang,Bo Pan
Hydrochar’s specific surface area (SSA) is important in environmental remediation; however, a hydrophobic coating formed on hydrochar creates a physical barrier that reduces that SSA. The formation and composition of the hydrophobic coating and its effects on hydrochar properties are unclear. In this study, hydrochar was produced from Chinese fan palm ( Livistona chinensis ) leaves at different temperatures. The resulting hydrophobic coatings were investigated by in situ characterization and then extracted with acetone for composition identification. Additionally, hydrochar properties were compared before and after hydrophobic coating removal. The results showed that the hydrophobic coating of the hydrochar produced at 180 °C was the insoluble cuticle layer of raw biomass, while the hydrophobic coatings formed above 180 °C were the depolymerization products of cutin. For the hydrochar above 180 °C, especially at 260 °C, the removal of the hydrophobic coating from hydrochar increased both its SSA and its oxygen-containing functional groups.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Science China-Materials
·
2025
·
IF 7.4
Li Hang,Wang Zehao,Tu Hongyi,Chen Min,Wu Yi,Wu Limin
Transparent superhydrophobic coatings hold significant potential for applications in architectural glass and optoelectronic devices. However, obtaining good compatibility between highly transparent, low haze and excellent mechanical stability in a superhydrophobicity coating remains a significant challenge. Inspired by the natural protection mechanism of the hierarchical structure of leaf veins, we have designed and fabricated transparent superhydrophobic coatings with highly detailed hierarchical vein-like ridges via a template-assisted multi-mask photolithography and inverted mold process combined with a spraying technique. The coated glass exhibited not only outstanding superhydrophobicity, with contact angle ⩾ 160° and sliding angle ⩽ 1.5° but also a high optical transmittance of 88.4% and a low haze of 8.1%, as well as remarkable mechanical durability and weather resistance.
研究领域:
材料科学
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仿生学
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光学工程
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2017
·Vol. 134
·期 25
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IF 1.86
Linlin Wang,Yuelong Liu,Gousheng Liu
Hydrophobic mica particles were prepared by piranha solution activation, silanization, and copolymerization with acrylate monomers. Its surface morphology, hydrophilic properties, and thermogravimetric analysis changed differently in comparison with those of pristine mica. Scanning electron microscopy (SEM) showed that the modified (001) mica surface changed from flat to coarse. Thermogravimetric curves demonstrated that silane coupling agents and the grafted polymer were anchored on the modified-mica surface. The alternating surface polarity state was verified by different dispersion performances in the solvents. SEM images showed that the polypropylene (PP)/modified-mica composites had a better quality compatibility than the PP/untreated-mica composites. The PP/polymer-grafted-mica composites had improved mechanical properties, including stretching, tension, and impact properties. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44985.
研究领域:
材料科学
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高分子化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PAPERS
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2020
·Vol. 75
·期 3
·1069-1081
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IF 1.68
Arukalam Innocent O.,Xu Dake,Li Ying
Pseudomonas aeruginosa ( P. aeruginosa ) has been implicated in the attachment and formation of marine biofilms which initiate biofouling and biocorrosion. To this end, several hydrophobic and superhydrophobic coatings have been suggested for anti-bacterial application, but some possess toxic substances which affect useful aquatic lives. Thus, the aim of this study was to appraise the anti-bacterial and anti-corrosion performance of hydrophobic perfluorodecyltrichlorosilane (FDTS)-modified poly (dimethylsiloxane) (PDMS)-ZnO coating using P. aeruginosa . The surface analytical, physico-chemical and electrochemical techniques were used to investigate the properties of the coatings. Results show that FDTS-modified PDMS-ZnO coating displayed higher resistance to adhesion of P. aeruginosa biofilm and better corrosion resistance performance than the unmodified coating. The outstanding performance of FDTS-modified coating was attributed to the low surface activity of FDTS which increased the kinetic barrier between the coating surface and biofilm. It is therefore anticipated that these results would provide insight in the design of future anti-bacterial coatings for marine application.
研究领域:
材料科学
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微生物学
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DOI
高影响因子
LANGMUIR
·
2018
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IF 3.789
Yan Yang,Ting Zhang,Jiajin Yan,Liuwa Fu,Hongping Xiang,Yanyan Cui,Jiahui Su,Xiaoxuan Liu
In this study, spiropyran (SP)-containing fluorinated polyacrylate (F-PA–SP) latex was prepared by emulsion polymerization using fluorinated and SP-based acrylic monomers as raw materials. Fourier transform infrared and 1H NMR demonstrate that the F-PA–SP copolymer has been successfully synthesized, and dynamic light scattering and transmission electron microscopy analyses indicate that the synthesized latex has presented a uniform particle size of approximately 200 nm. X-ray photoelectron spectroscopy, atomic force microscopy, and water contact angle (WCA) analyses were used to investigate the surface properties of the F-PA–SP coating and demonstrate that its hydrophobicity is enhanced by the addition of a fluorinated acrylic monomer. The photochromic properties of the coating were investigated by UV/vis spectroscopy, and the results reveal that the F-PA–SP coating possesses better photoresponsiveness, fatigue resistance, and photoreversibility under UV/vis irradiation than the coating prepared using fluorinated polyacrylate/SP blended latex. Moreover, the WCA of the F-PA–SP coating subjected to UV/vis irradiation shows minimal changes and retains its excellent hydrophobicity. Finally, the F-PA–SP latex was applied to cellulosic paper, and the resulting photochromic paper exhibits outstanding reversible color changes and hydrophobicity.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Wood Material Science & Engineering
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2023
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IF 2.2
Longchao Ma,Yihan Zhao,Tao Zhang,Xinzhou Wang,Meiling Chen,Liang Chen,Yanjun Li
In this report, we present a simple and rapid method for fabricating a hydrophobic coating of Phytic Acid-based hybrid complexes on wood surfaces to enhance their properties. This hydrophobic coating's micro/nanoscale coarse structure is constructed from a PA-Fe3+ coordination complex, and its low surface energy is further modified by impregnation with octadecylamine. Polyethyleneimine serves as an intermediate layer, tightly binding the wood to the PA-Fe3+ coordination complex. We characterized the microstructure, chemical composition, water contact angle, and anti-mold properties of the wood samples using SEM-EDS, FTIR, water contact angle tests, and anti-fungal tests. Further, we assessed the hydrophobic coating's chemical and environmental durability, contamination resistance, self-cleaning properties, and mechanical stability on composite wood. SEM-EDS and FT-IR mapping results confirmed that the PEI and PA-Fe3+ coordination complex were successfully coated on the wood surface, with long-chain octadecylamine grafted onto the complex particles. The composite wood with a 3-layer hydrophobic coating demonstrated superior surface properties, including a water contact angle of 145°, excellent chemical and environmental durability, contamination resistance, self-cleaning properties, and mechanical stability. Notably, it also exhibited superior anti-mold properties compared to the control.
研究领域:
材料科学
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林学
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表面化学
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产品关联
DOI
高影响因子
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
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2020
·
IF 1.701
Taiheng Zhang,Shuai Wang,Jian Huang,Yingshan Jin,Guoqing Zhao,Chongyang Zhang,Caifeng Li,Jingang Yu,Yanlin Jia,Feipeng Jiao
Nowadays, finding an efficient way to treatment oil spill and oily wastewater emission has attracted much attention all over the world. In this work, we fabricated a superhydrophobic coating (humic acid grafted by octadecylamine) with a simple method, and sprayed this coating on different structures which apply for self-cleaning, collect oil, and filter oil/water mixtures. In addition, silane-modified polymer sealant was used to strengthen the adhesive attraction between coating and structures. The coated mesh exhibited excellent superhydrophobicity (water contact angle of 153.14°) and superolephilicity (oil contact angle near 0°). Moreover, the coated mesh displayed outstanding performance in oil/water separation with huge oil flux about 16633.9 L h−1 m−2, high separating efficiency more than 95%, and good reusability (more than 10 cycles). Furthermore, the pore size of the coated mesh could regulate by changing the cycle of coated process, and the micro pore size of mesh could realize water-in-oil emulsions separation. To sum up, these merits of the superhydrophobic humic acid grafted by octadecylamine coating displayed great potential for effective oil/water separation.
研究领域:
材料科学
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环境工程
✓ 已验证
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
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2017
·
IF 2.589
Yuan Tian,Kai Guo,Xiufang Bian,Tianqi Wang,Suhong Chen,Jiaxiang Sun
Room-temperature curable superhydrophobic composite coating (SHC) was fabricated on nitrocellulose lacquer using single-step spraying process. The suspension of perfluorosilane-coated silica nanoparticles was synthesized by sol-gel method at 60 °C. The groups of Si O Si and CF 2 are detected on the SHC by XPS and FTIR. The SEM and AFM images exhibit rough and hill-like morphology of the SHC. The contact angle on the SHC for deionized water reaches 161° with slide angle of 2°, and is still > 150° even for acidic and alkaline liquid. Cross-cut tape adhesion test manifests that adhesion force of superhydrophobic coating to nitrocellulose lacquer is a highest class of 5B according to ASTM D3359 standard. Furthermore, the SHC still keeps good superhydrophobicity by cross-cut tape adhesion test and exposure to outdoors for 300 days. After immersing in acid and alkali for 3 h or organic solvents for one week, water contact angle of SHC is still > 140°. The SHC with sufficient adhesion to various materials has excellent durability and chemical stability, prolonging service life of nitrocellulose lacquer via maintaining their self-characteristics.
研究领域:
材料科学
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表面化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2017
·Vol. 134
·期 23
·
IF 1.86
Xue Yin,You-Zhi Song,Zhi-Ying Liang,Bin Zhang,Li-Feng Fang,Li-Ping Zhu,Bao-Ku Zhu
Fluorinated acrylate emulsions have been extensively applied for hydrophobic surface coatings. To obtain fluorinated emulsions of low surface energy, amphiphilic sulfonyl macro emulsifiers consisting of 2-(perfluorohexyl) ethyl acrylate (PFHEA) and 2-acrylanmido-2-methylpropanesulfonic acid (AMPS) were designed via radical polymerization and subsequently used for the emulsion copolymerization of PFHEA, methyl methacrylate (MMA), and methyl butyl acrylate (MBA). Under optimum synthesis conditions, the emulsifier displayed superior emulsification properties such as high monomer conversion, small particle size, and excellent stability compared with conventional emulsifiers. The corresponding emulsions with sulfonyl macro emulsifiers exhibited extreme low surface energy (9.8 mN/m) and outstanding hydrophobicity due to high contents of fluorinated chains, as well as thimbleful hydrophilic sulfonyl groups, which shows the great potential in water repellent modification application. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44921.
研究领域:
材料科学
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高分子化学
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表面化学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2022
·Vol. 14
·期 20
·4413
·
IF 4.967
Xi Chen,Lijiaqi Zhang,Min Wu,Yong Huang
Green and sustainable cellulose-based hydrophobic coatings are increasingly the subject of scientific and industrial research. However, few researchers pay attention to preparing it by a one-step method. Therefore, a superhydrophobic coating composed of hydrophobic SiO2and cellulose nanofiber modified by 3,4-dichlorophenyl isocyanate was manufactured through one-step ball milling. It was found that the ball milling can promote SiO2dispersion and achieve the preparation of modified nanocellulose, which further disperse SiO2nanoparticles to form film or coating. Compared with the ultrasonic dispersion method, the composite coating prepared by ball milling method can obtain higher water contact angle and more stable hydrophobic properties. The hydrophobic cellulose nanofiber can load 1.5 equivalents of SiO2nanoparticles to form a uniform film with the water contact angle of 158.0° and low moisture absorption. When this nanocomposite is used as a coating material, it can impart super-hydrophobicity to paper surface with water contact angle of 155.8°. This work provides a facile way to prepare superhydrophobic nanocellulose/nanoparticles composite coatings and films, thereby broadening the ways of dispersing nanoparticles and constructing superhydrophobic coatings.Keywords:cellulose nanofiber;hydrophobic SiO2nanoparticle;composite;hydrophobic coating;optical tunable film
研究领域:
材料科学
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化学工程
✓ 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）