Coatings
·
2020
·Vol. 10
·期 9
·847
·
IF 2.436
Zede Yi,Bo Zhao,Murong Liao,Zhiyong Qin
Superhydrophobic treatment of wood surfaces can effectively prevent the contact between the external moisture and wood, which improves the service life of the wood. In this study, different rough surfaces of wood were constructed, derived from the self-polymerization of dopamine (DA) in weak base solution to form a polydopamine (PDA) coating and the deprotonation of the PDA coating in a strong base solution. Furthermore, octadecyltrichlorosilane (OTS) was used as a low-surface-free-energy agent to modify rough surface in order to prepare superhydrophobic woods: Wood@PDA–NaOH–OTS and the Wood@PDA–NaOH/SiO2–OTS. The contact angles (CAs) and sliding angles (SAs) of the resulting superhydrophobic woods were tested. The results showed that the CA and SA of the Wood@PDA–NaOH–OTS were 151° and 4.8°, respectively; the CA and SA of the Wood@PDA–NaOH/SiO2–OTS were 155.1° and 5.0°, respectively. Surface electron microscopy (SEM) images presented that NaOH successfully etched the PDA coating, and the roughness was further improved by adding nano-SiO2. Atomic force microscope images (AFM) revealed that the nano-SiO2particles could effectively provide nanolevel roughness, which was beneficial to the wood’s superhydrophobic properties. In addition, the obtained superhydrophobic wood possessed strong surface stability and anti-loss property, as well as resistance to acid-base solution and organic solvent.Keywords:polydopamine;alkaline etch;superhydrophobic wood;stability
研究领域:
材料科学
·
表面工程
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Likun Yang,Hua Yuan,Yongjie Shi,Shengping Wang,Xinbin Ma
An efficient alcohol adsorbent has been prepared by the NaOH etching of Na-FAU zeolite and applied for the deep removal of the alcohol from FT-mixed olefins. Due to the NaOH etching, the adsorption capacity of the NaX-2 adsorbent (85 mg/g) for n-butanol was significantly higher than the NaX adsorbent (42 mg/g). As demonstrated by SEM, 29 Si NMR, 27 Al-NMR, CO 2 -TPD, and N 2 adsorption–desorption, the etching of zeolite NaX occurs at the grain boundary, which leads to more mesopores, increased weak base sites, and Si(3Al) structure formation by alkali etching, facilitating alcohol diffusion and improving the adsorption through hydrogen bonding. In-situ FTIR and molecular simulations were employed to demonstrate the adsorption models of alcohols over Na-FAU zeolite. The hydrogen bonding network formed by dealumination finally enhances the alcohol adsorption by the hydrogen bonding by O al -H al ‧‧‧O zeo and O zeo -H zeo ‧‧‧O al . This work provides a facile preparation method for removing trace alcohol from olefins, giving promising guidance for industrial applications.
研究领域:
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
MATERIALS LETTERS
·
2021
·
IF 3.423
Wenjing Dong,Tianyi Xie,Haiyi Peng,Haishen Ren,Huixing Lin
BiOBr photocatalytic active coatings on bismuth-boron-zinc glass carrier using acid etching synthesis were obtained. The effect of direct and indirect corrosion of the glass layer on the bonding ability of the coatings and the substrate were studied. Specially, the BiOBr photocatalytic coating obtained by acid etching after crystallization of the glass has stronger bonding ability with the glass substrate. This is because the needle-like crystal structure after crystallization can be used as a transition layer to closely combine the glass and the photocatalytic coating. In this paper, the concept of plant cultivation was introduced to explain that the coating prepared by the indirect method had a better bonding force with the substrate. This research solves the traditionally difficult recycling problem of degrading organic pollutants in the form of powder, and the preparation method is simple and suitable for industrial mass production.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Wei Zhao,Yifan Song,Zhen Song,Jiaxin Li,Yuanjing Zhang,Wenxia Zhao,Huaijun Chen,Yangyang An,Ziyan Wang,Siyu Ma,Haoxian Li,Wenzhuo Ma,Kaihong Hui
Polycarbonate-acrylonitrile-butadiene-styrene (PC-ABS) has been treated with an aqueous solution of N -methylpyrrolidone (NMP) and ethanol (C 2 H 5 OH) under conditions that achieve a controlled level of polymer swelling. In addition, the micro-etching effect of alkaline potassium permanganate on PC-ABS was investigated using a low environmental impact binary micro-etching system. The effect of NaOH concentration, etching time, and temperature on surface roughness, morphology, wettability, and PC-ABS adhesion strength has been examined. The PC-ABS surface characteristics were analyzed using field emission scanning electron microscopy (SEM), atomic force microscopy (AFM), Fourier transform-infrared (FT-IR) spectroscopy, and X-ray photoelectron spectroscopy (XPS). The results have demonstrated that the surface morphology was altered after micro-etching, with an increase in surface roughness ( R a ) from 9.69 to 316 nm. In addition, the contact angle decreased from 92.2° to 30.1°, and the adhesion strength increased to 0.88 kN/m. The findings of this study have established an effective micro-etching process using alkaline potassium permanganate that enhances the wettability, surface roughness, and adhesion strength of the PC-ABS copolymer.
研究领域:
材料科学
·
表面工程
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2020
·Vol. 187
·期 4
·1-9
·
IF 6.232
Wang Qian,Peng Ruifeng,Wang Yishan,Zhu Shouzhe,Yan Xiaoxia,Lei Yunyi,Sun Youbao,He Haibo,Luo Liqiang
A triangular gold nanoplate (AuNPL)–based colorimetric assay is presented for ultrasensitive determination of cupric ions (Cu 2+) and mercuric ions (Hg 2+ ) in sequence. AuNPLs were found to be etched efficiently when producing triiodide ions (I 3 − ) by a redox reaction between Cu 2+ and iodide ions (I − ), leading to a change of the shape of AuNPLs from triangular to sphere along with a color change from blue to pink. In the presence of Hg 2+ the etching of AuNPLs was suppressed due to the consumption of I − by the formation of HgI 2 . With an increase of the concentration of the Hg 2+ a transformation from sphere to triangular in the shape of AuNPLs occurred with a color change from pink to blue. The evolution of AuNPLs from etching to anti-etching state by sequential addition of Cu 2+ and Hg 2+ was accompanied with color variations and band shifts of localized surface plasmon resonance (LSPR), allowing for visual and spectroscopic determination of Cu 2+ and Hg 2+ successively within 15 min. In the range 0.01–1.5 μM for Cu 2+ and 0.02–3.0 μM for Hg 2+ , the linear relationship between the band shift values and the target ions concentration was found good ( R 2 > 0.996). The limit of detections (3S/k) was 19 nM for Cu 2+ and 9 nM for Hg 2+ , respectively. The lowest visual estimation concentration was 80 nM for both Cu 2+ and Hg 2+ through the distinguishable color changes. This system exhibited desirable selectivity for Cu 2+ and Hg 2+ over other common ions tested. The method has been successfully applied to sequential determination of Cu 2+ and Hg 2+ in real water and food samples.
Scheme 1 Schematic illustration for sequential detection of Cu 2+ and Hg 2+ based on etching of AuNPLs
研究领域:
分析化学
·
纳米科技
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Chunhong Zhang,Xiangkui Jiang,Fuhua Yu,Yang Liu,Qi Yue,Peng Yang,Yongchun Liu
The noble metal nanoparticles-based colorimetric detection can simply determine the concentration of the substances by naked eyes, but difficultly resolve the conflict between sensitivity and anti-interference ability. Herein, a triangular silver nanoplates (TSNPs)-based anti-etching colorimetric detection method for analyzing thiram was proposed by regulating the antagonistic action between the protection of thiram and the etching of I − on TSNPs . The internal mechanism of etching induced peak shift of TSNPs was revealed by the discrete dipole approximation method. The effect of thiram and I − on the color of TSNPs was systematically studied. As a consequence, this method not only shows a limit of detection of 19.7 nM in the linear range of 0.025−0.35 μM by absorption spectroscopy, but also produces sensitive color changes for the detection by naked eyes. Especially, it shows good selectivity that can resist the interference of other substances including other pesticides and halide ions in the specimens. It also shows excellent applicability in the detection of thiram residues in soil. This work provides a potential device-free strategy for the application of colorimetric detection in specimens with lots of interfering substances.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
·
2021
·Vol. 219
·期 3
·2100568
·
IF 1.981
Ling Lan,Haidou Wang,Lina Zhu,Yuelan Di,Jiajie Kang,Junhong Qiu
Herein, a grid-like microstructure is prepared on the surface of 3Cr13 stainless steel through nanosecond laser etching, and the self-assembled 1 H ,1 H ,2 H ,2 H -perfluorodecyltriethoxysilane (PFDS) coating is further composited to prepare a superhydrophobic surface with a contact angle of 164° and a rolling angle of 3°. The effect of laser etching cycles on the surface microstructure and surface wettability before and after the self-assembly is studied. With an increase in the etching cycles, a stable grid-like microstructure is gradually formed on the surface, and subsequently, a composite structure of grooves and pits is formed. After the self-assembly of the PFDS coating, two superhydrophobic surfaces with different wetting properties are obtained. Furthermore, as the etching cycles increase, the surface changes from a superhydrophobic and high-adhesion state to a superhydrophobic and low-adhesion state. The decrease in surface energy is mainly attributed to the C−F group in the PFDS molecule. The experimental results show that PFDS molecules are deposited easily in case of the convex surface, thereby facilitating the formation of superhydrophobic low-adhesion surfaces. Finally, the superhydrophobic surface is still maintained after cumulative ultrasonic cleaning in deionized water for 75 min, showing good reusability and stability.
研究领域:
材料科学
·
表面工程学
✓ 已验证
DOI
高影响因子
Sustainable Materials and Technologies
·
2024
·
IF 8.6
Ruijiang Sun,Bo Hou,Junjie Huang,Xiguang Li,Chang Liu,Mingjun Chen,Chunya Wu
Ice accumulation on the metallic surface usually results in seriously economic losses, resource wastes and even hazard accidents. Superhydrophobic surfaces (SHSs) are recognized as one of the most promising candidates for water repellence and anti-icing, offering both environmental and economic advantages over the traditional methods. The ordered microstructure arrays with controllable parameters play an essential role in mechanism analysis, rational design and reproducible construction of SHSs. However, the efficient fabrication of ordered microarrays on metal substrates with high resolution and high accuracy is still fraught with significant challenges. Here, a multilevel micro/nano surface with rectangular micropillars was fabricated on copper substrate by the integration of micro milling and chemical etching, which exhibits superior superhydrophobicity with water contact angle of 171.1 ± 1.5° and sliding angle of 2.2 ± 0.7°. The developed deburring scheme makes an outstanding contribution to the in-situ removal of milling burrs generated on the top of micropillars. The variation in surface wettability with microarray geometry and etching conditions indicates that a favorable surface morphology is crucial for improving the water repellency of the surface. The results of the durability experiment and the self-cleaning test demonstrate the robust comprehensive stability of the prepared SHSs against moisture, high temperature and mechanical wear, as well as the superior fouling resistance against solid and liquid contaminants, which is mainly ascribed to the hierarchical micro/nanostructures. Moreover, the present micro/nanostructures are also demonstrated to be capable of enhancing the delayed icing performance of the copper surface, with the freezing time of a 5 μL water droplet being 519.86 ± 13.53 s. Meanwhile, the superhydrophobic copper surfaces exhibit remarkable anti-icing behavior against saline solutions, as evidenced by the freezing time of 1078.42 ± 31.24 s for a 5 μL NaCl droplet. This work provides a sustainable and high-precision approach for the fabrication of metal-based SHSs, expecting to advance the theoretical research and industrial applications of anti-icing functional surfaces.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Lijuan Chen,Fangzhong Liu,Yaoyong Dong,Yong Pei,Xianyou Wang,Xiongwei Wu,Xuejun Zheng,Wenyuan He,Bei Long
Constructing (002) crystal plane-exposed Zn anodes by acid etching strategy can efficiently inhibit the Zn dendrite growth in aqueous zinc-ion batteries. However, there is rare research on the role of anions in the etching process. Herein, we investigate the effects of anions in acid etching strategies by theoretical calculations and experimental analyses. The strong adsorption of anions (such as C 6 H 5 O 7 3− and C 6 H 6 O 7 2− ) on Zn (002) plane can prevent acid etching. Therefore, the electrode with exposed Zn (002) plane (CA@Zn) is successfully prepared by citric acid etching. Due to the exposed Zn (002) plane and a unique porous architecture, the CA@Zn displays high corrosion resistance , excellent Zn reaction kinetics, and dendrite suppression. As a result, the CA@Zn symmetric cell exhibits a stable cycling for 1600 h at a current density of 0.5 mA cm −2 and the CA@Zn||Cu half cell achieves a high average Coulombic efficiency of 98.2 % for 1200 cycles. Moreover, CA@Zn||MnOOH full cells deliver high specific discharge capacity and excellent rate performance.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
·
2019
·Vol. 29
·期 3
·037001
·
IF 2.141
Chunyang Wei,Chengzhuang Yu,Jie Jayne Wu,Junwei Li,Shanshan Li,Shijie Dai,Tiejun Li
Tapered glass capillaries play an important role in microdroplet generation and related microfluidic applications such as particle synthesis, digital PCR and microrectors. However, its controlled production poses a challenge. Specifically, there is difficulty controlling the tip sizes of capillaries with good repeatability at an affordable cost, which is critical to produce standard droplets for use by research groups. To produce tapered capillaries, micro needle geometries are first pulled by a commercial pipette puller, which yields a sharp tip (i.e. 1–3 m). Those tips need to be enlarged and standardized by post microfabrication. Although larger tips could be achieved by advanced pulling-forging, sanding-forging or breaking-forging methods, the uniformity and repeatability do not meet the requirements for mass production. In this paper, several easy-to-operate fabrication approaches, including mechanical and chemical fabrication methods, are studied. Chemical etching fabrication method shows good repeatability and robust control of dimensions. A capillary droplet microfluidic device assembled by tapered glass capillaries fabricated by chemical etching method is also presented, which shows good performance for droplet generations. This non-labor intensive fabrication is straightforward and be readily adopted for industrial scale mass production.
研究领域:
微流控技术
·
生物工程
✓ 已验证
DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2020
·Vol. 412
·期 29
·8051-8059
·
IF 3.637
Liu Bo-Wen,Huang Peng-Cheng,Wu Fang-Ying
A simple but efficient colorimetric assay was developed for the detection and quantification of acid phosphatase (ACP) using a smartphone. This strategy is based on target-controlled iodine-mediated etching of gold nanorods (AuNRs). Due to effective hydrolysis of the substrate pyrophosphate (PPi) by ACP, chelated Cu 2+ with PPi was released, which promoted the redox reaction with an iodide ion (I − ), leading to the formation of I 3 − . As the etching agent of AuNRs, I 3 − caused a blueshift of the localized surface plasmon resonance peak and, more importantly, an observable color change. The vivid colors were recorded with a smartphone camera and directly analyzed using an image-processing app. On the basis of the direct correlation between ACP concentration and the etching degree of AuNRs as well as color change, this smartphone nanocolorimetry technique showed a good linear response toward ACP over the range of 0–15.0 U/L, with a detection limit of 0.97 U/L. Using the standard addition method, the practical applicability of the proposed smartphone-based assay was successfully demonstrated by determining ACP in human serum samples, with results consistent with those obtained by UV-Vis spectrophotometry.
研究领域:
生物化学
·
医学检验
·
纳米技术
✓ 已验证
DOI
PubMed
高影响因子
Journal of Coatings Technology and Research
·
2019
·Vol. 16
·期 4
·1099-1108
·
IF 1.584
Chen Shangda,Wang Hao,Wan Zuteng,Chen Ling,Liu Yangchengyi,Fan Hanghai,Zhong Bowen,Wang Xiufeng
Superhydrophobicity of alloy surfaces is generally determined by the low-energy chemical composition and geometric structure of the surface. The appropriate geometry on alloy surfaces can be easily constructed via chemical etching methods. However, the subsequent low-energy modifications for pre-etched alloys are time-consuming or expensive, thus preventing their further application. Here, we prepared superhydrophobic alloy surfaces based on combining wet chemical etching and room temperature vulcanized (RTV) silicone treatment. Compared to traditional immersion methods, RTV silicone treatment for superhydrophobic 6061 Al alloy surfaces needs only 30 s, which is several thousand times faster than stearic acid or polymethyl triethoxy silane solution treatment. Mechanisms of RTV silicone treatment were investigated. The results show that dip-coating modification is different from these traditional methods. We found that the optimized proportion for RTV silicone rubber is HPDMS, PMTSi, and DBTDL with hexane solvent (HPDMS:PMTSi:DBTDL:hexane = 4:3:1:46, weight ratio), and the water contact angles of treated surfaces of pre-etched 6061 Al alloy, pure Al, and steels are 159° ± 2.7°, 168° ± 1.2°, and 169° ± 1.5°, respectively. Herein, our results demonstrate a facile, low-cost strategy to fabricate superhydrophobic alloy surface that is notable and easy to scale up for industrial applications.
研究领域:
材料科学
·
表面工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）