Journal of Coatings Technology and Research
·
2022
·Vol. 20
·期 3
·869-881
·
IF 2.339
Li Xianwen,Xu Xinmeng,Zhang Faai
Hydroxyl acrylate emulsion was prepared firstly by the semicontinuous seeded emulsion polymerization, and then adding polyaniline (PANI)/Cu/ZrO 2 ternary nanocomposites, two-component waterborne polyurethane (2 K WPU) composite coatings with antistatic and antibacterial properties were obtained by mixing the emulsion with hydrophilic modified polyisocyanate. The structure and morphology of the PANI/Cu/ZrO 2 were observed by Fourier transform infrared spectroscopy, scanning electron microscopy, and X-ray diffractometer. The thermal, antistatic, antibacterial, anticorrosion, and mechanical properties of the 2 K WPU composite coatings were determined. The results showed that the addition of the ternary nanocomposites increased the antistatic, antibacterial, anticorrosion, and mechanical properties of the 2 K WPU coating. The initial decomposition temperature increased from 200 to 225°C, and the tensile strength increased by 44.4%. The coatings still maintained good impact strength of 50/50 kg cm, adhesion of grade 2, flexibility of 1 mm, pendulum hardness of 293 s, and the gloss (60°) of 119.4.
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
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Xia Wang,Li Hou,Ling-long Xu,Xiong Li,Huan Jiang,Wen-jie Zhou
In this paper, an inorganic-organic composite modification of nano-TiO 2 has been carried out using aluminum sulfate octahydrate and γ-aminopropyltriethoxysilane (KH550) to obtain AKT with good dispersion performance. The AKT-WPU composite coating with different amounts of nano-TiO 2 added was prepared by blending AKT with waterborne polyurethane (WPU). The nano-TiO 2 , before and after modification, was analyzed by Fourier transform infrared spectroscopy and indicates that alumina and KH550 can be successfully grafted onto the surface of nano-TiO 2 . Our thermogravimetric analysis shows that the heat resistance of the AKT-WPU composite coating was improved. The corrosion resistance of the AKT-WPU composite coatings was investigated by electrochemical impedance spectroscopy and polarization curves. Our results show that the addition of AKT significantly improves the corrosion resistance of the composite coating. The resistive modulus of the composite coating with 0.7% AKT addition amounted to 5.05×10 6 Ω. The corrosion current density is 5.21×10 -9 A, which is more than two orders of magnitude lower than that with the pure WPU coating. The corrosion inhibition efficiency can reach 99.54%. The coating was subjected to a long-term immersion test and observed by a scanning electron microscope. After immersion for 360 h, our results show that the coating still protected the stainless steel.
研究领域:
材料科学
·
防腐蚀工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2024
·
IF 4.3
Zelin Liu,Xinjie Zhou,Zongsheng Wu,Chuanhui Gao,Yuetao Liu,Yanqing Wang,Luyang Sun,Li Ding
Waterborne polyurethane (WPU) coatings are recognized for their environmental friendliness and non-toxic nature. However, the presence of abundant hydrophilic groups within their polymer networks often restricts their hydrophobicity and mechanical performance. In this study, we utilized two distinct diols to design the molecular structure of WPU, aiming to enhance its mechanical properties by optimizing microphase separation and crystallinity, achieving a tensile strength of 24.13 MPa and a strain of 1350 %. The resultant WPU exhibited high cohesion and abundant hydrogen bonding sites, which contributed to its strong adhesion of 8.31 MPa. Moreover, inspired by the self-cleaning function of lotus leaf-micro-nipples, we made the surface superhydrophobic by micro-nano structure. The irregularly embedded structure was formed between the WPU and SiO 2 @hbp. The surfaces of WPU coatings formed the peak-valley structure similar to the lotus leaf, achieving a water contact angle of 162° and a sliding angle near 1°. Additionally, the self-cleaning property of the coatings was preserved after 200 cycles of friction, each with a single friction distance of 40 cm. The environmental friendliness and excellent self-cleaning capabilities of the coating highlight its potential for practical applications and provide a valuable reference for developing waterproof self-cleaning coatings.
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
Russian Journal of Physical Chemistry A
·
2023
·Vol. 97
·期 9
·2044-2051
·
IF 0.7
Xu Zhenkai,Chen Lian,Han Jingliang,Zhu Chengfei
Abstract Galvanized steel is one of the commonly used material in the field of corrosion protection, but it’s prone to corrosion in heavily corrosive environments. Hence, the Hot-Dip Aluminized-Galvanized Steel (HDAGS) was developed, which is less susceptible to corrosion, by adding aluminum to the galvanizing solution. But in marine environment, the HDAGS still requires further protection. In this article, the effect of nine common corrosion inhibitors on HDAGS was evaluated by Immersion corrosion test, Tafel polarization, EIS test, XRD, SEM&EDS firstly. The results showed that the adsorbed film inhibitors and the deposited film inhibitors were effective, but the oxidized film inhibitors were not ideal because the Al–Zn coating was hard to oxidize. The corrosion rate of HDAGS in simulated seawater containing 1 wt % zinc phosphate was 3.333 × 10 –7 g/(m 2 h), while it was 6.072 × 10 –4 g/(m 2 h) in simulated seawater without inhibitor, and the inhibition efficiency was 99.94%. Three most effective inhibitors were then added to the waterborne polyurethane coating (WPUC) for HDAGS, and the performance was evaluated by EIS and Immersion corrosion test. The impedance of WPUC containing inhibitors all decreased fast at the beginning of immersion. The subsequent action of the corrosion inhibitor in the corrosion process extended the service life of WPUC by 2–3 times.
研究领域:
材料科学
·
腐蚀与防护
·
表面工程
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Ge Cao,Anqi Wu,Chuhan Zhang,ShiJia Zhang,Zhenyu Wang,Enhou Han
Corrosion is a major challenge across various industries, leading to significant economic losses and safety hazards. This study synthesized polypyrrole nanotubes (PPy-NTs) using methyl orange (MO) as a template and polyvinylpyrrolidone (PVP) as a dispersant. The PPy-NTs exhibited excellent dispersion stability (zeta potential of 34 mV) and high electrical conductivity (28.5 S/cm). Waterborne polyurethane (WPU)-based coatings with varying PPy-NT concentrations (0 %, 0.5 %, 1.0 %, and 2.0 %) were evaluated for corrosion resistance in a 3.5 wt% NaCl solution over immersion periods of 1, 7, 14, and 28 days. Electrochemical impedance spectroscopy (EIS) showed that the 1.0 % PPy-NT coating provided the best corrosion protection, with an initial impedance about 30 times higher than the pure WPU coating. After 28 days, its impedance remained over 200 times higher than that of the pure WPU coating. Polarization tests confirmed the 1.0 % PPy-NT coating had improved corrosion resistance, with a lower corrosion current density (49.4 nA/cm²) and higher corrosion potential (-0.13 V) compared to the pure WPU coating (636 nA/cm², −0.58 V). Salt spray testing showed the 1.0 % PPy-NT coating had superior corrosion resistance. These results demonstrate the enhancement of WPU coatings with PPy-NTs, showing potential for long-term corrosion protection.
研究领域:
材料科学
·
腐蚀与防护
·
高分子材料
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Alabati Aireken,Akram Yasin,Bin Hao,Peng-Cheng Ma
Polyethylene terephthalate (PET) is widely used in industry and daily life with its excellent mechanical and thermodynamic properties, and its surface property arising from coating has a great impact on its application. However, most coatings on PET display poor fastness and environmental pollution because of inactive surface and organic solvent . Encouraged by the cation-π interaction between the cationic and aromatic groups, we designed a strong adhesive waterborne polyurethane (PU) coating on PET fabric for oil/water separation. The bis(2-hydroxyethyl) dimethylammonium chloride (BDAC) in polymer not only provides PU with self-emulsification property, but also endows the coating with strong cation-π interaction with PET substrate. The effect of hydrophilic group on the property of PU dispersion was investigated by adjusting the content of BDAC. In addition, the interaction of optimized PU dispersion with single PET fiber was also quantitatively studied by adhesion force and surface tension measurements. It was demonstrated that the introduction of BDAC as cationic group resulted in a strong adhesion of PU coating on PET fabric and the coating could withstand various harsh environments. Furthermore, the synthesized coating could be used as an intermediate adhesive layer to anchor fumed SiO 2 on PET fabric, improving the surface roughness and hydrophobicity of the substrate. The modified fabric exhibited remarkable durability and excellent ability for oil/water separation.
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
MACROMOLECULAR MATERIALS AND ENGINEERING
·
2022
·Vol. 307
·期 7
·2100933
·
IF 4.402
Jianfei Hu,Wenjie Huang,Yu Wu,Yuting Zhao,Ye Wan,Yuan Meng,Wangdong Liang,Tao Jiang,Qunchao Zhang
Herein, a “liquid-like” surface topography and sustainable approach is reported to fabricate transparent oil-repellent coatings, which involves fabricating new crosslinking polyols by siloxane oligomer modified castor oil fatty chain, followed to obtain waterborne polyurethane coatings. This surface morphology is formed by the grafted polydimethylsiloxane (PDMS) molecular chains in the coating molecules. This low surface tension and liquid-like topography reduces the coefficient of friction with oily contaminants. Various low-surface-tension liquids can easily slide down the coating surfaces on substrates with lower tilting angle. The coatings are applicable to different substrates including glass, plastic, steel, and wood, and those with complex shapes and large surface areas. Thanks to the as-described crosslinking structure of the coatings, their easy-sliding oil repellency can be well maintained to avoid sand abrasion damages. Therefore, the advantageous characteristics of the as-developed high transparency oil-repellent and eco-friendly coatings have the potential to replace traditional coatings and are highly practical for shielding against oily contaminants, chemical-shield that protect coated plastics from dissolution by organic solvents, and nonstick coatings.
研究领域:
材料科学
·
可持续化学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Mengsha Yin,Shuhua Tu,Jie Feng
Energy conservation in buildings has become a crucial approach to alleviating the energy crisis and reducing carbon emissions. Thermal insulation coatings are one of the effective methods for energy conservation in buildings. In this study, hollow polystyrene microspheres (HPMs) with varying particle sizes and enhanced thermal insulation performance were synthesized via seeded emulsion polymerization combined with alkali swelling. By adjusting the initiator content, core particle sizes were controlled between 142 and 354 nm, yielding HPMs with particle sizes ranging from 364 to 550 nm and cavity diameters from 127 to 370 nm. At a 40 wt% HPMs-0.775 loading, the composite coating exhibited enhanced solar reflectance (98.1% ± 0.7%) due to the synergistic effects of light reflection and thermal insulation from the hollow interiors. The coating's average transmittance was 6.5% ± 1.3%, and its average reflectance reached 43.1% ± 1.4%. The thermal conductivity of the coating (0.1098 ± 0.0056 W/m K) was found to be significantly lower than that of all other tested compositions.
研究领域:
材料科学
·
高分子科学
·
建筑节能
·
化学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Frontiers of Chemical Science and Engineering
·
2018
·Vol. 13
·期 1
·59-69
·
IF 2.643
Yang Dongjie,Wang Shengyu,Zhong Ruisheng,Liu Weifeng,Qiu Xueqing
A simple method using a water soluble lignin quaternary ammonium salt (LQAS) and TiO 2 has been developed for the preparation of lignin/TiO 2 nanocomposites in an aqueous medium under mild conditions. The LQAS/TiO 2 nanocomposites contain well-dispersed small particles with excellent ultraviolet (UV) shielding abilities and good compatibilities with waterborne polyurethane (WPU). When the LQAS/TiO 2 nanocomposites were blended with WPU, the UV absorbance and the tensile ductility of the WPU increased significantly. The composite WPU hybrid film containing 6 wt-% LQAS/TiO 2 nanocomposite had the highest visible light transmittance and had excellent ultraviolet aging properties. After 192 h of UV light irradiation, the tensile strength of the composite film was above 8 MPa and the elongation at break was 800%. This work highlights new possibilities for the utilization of alkali lignin.
研究领域:
高分子材料
·
纳米复合材料
·
表面涂层技术
·
紫外线防护
·
绿色化学
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Weiwei Dong,Danbo Qian,Ying Xi,Junlong Peng,Wenhao Hong,Yilan Luo,Yunfeng Bai,Shigen Zhu
With increasing demand for deep-sea exploration, high-performance submersible fabric materials are urgently needed. In this study, the surface of hollow glass microspheres (HGMs) was functionalized using silane coupling agent KH550 to prepare amino-modified HGMs. Subsequently, polyurethane-coated HGM (PU-HGMs) were synthesized via in-situ polymerization. Waterproof and thermally insulating composite coatings were prepared on the surface of fabrics by lamination technology, with waterborne polyurethane (WPU) as the matrix material and incorporating HGM and PU-HGM as fillers. The results demonstrated that PU-HGMs fully retained the hollow structure of HGMs, and the surface polyurethane layer (approximately 1.5 μm thick) significantly enhanced the shear resistance of HGMs as well as their interfacial compatibility with the WPU matrix. When the content of PU-HGMs was 20 wt%, the thermal conductivity of the coating decreased to 0.05 W/(m·K), representing a 75.4 % reduction compared to pure WPU. Infrared thermal imaging showed the 20 wt% PU-HGMs coating maintained a temperature of 49.4 °C after 2 min at 100 °C, demonstrating excellent thermal insulation. The 20 wt% PU-HGMs coating had a water contact angle of 121.33° and a water absorption rate of 3.1 %, showing excellent hydrophobicity. When the content of PU-HGMs is 5 wt%, the tensile strength of the composite coating reaches 0.83 MPa and the elongation at break is 1261 %, highlighting the remarkable toughening effect of the polyurethane coating. This study enhances the effective loading of HGM as fillers in waterborne coatings and offers a novel strategy for designing and large-scale manufacturing environmentally friendly diving suit coatings.
研究领域:
材料科学
·
高分子科学
·
表面工程
·
隔热材料
·
海洋工程
✓ 已验证
产品关联
DOI
高影响因子
Biomaterials Science
·
2021
·Vol. 9
·期 22
·7504-7521
·
IF 6.843
Jiatao Zhang,Junyi Yang,Qiuying Li,Jie Ding,Liangjun Liu,Tong Sun,Hehe Li
Fabrication of anti-wetting coatings with anti-biofouling and anti-biofilm properties has become a hot spot of attention in recent years. However, the anti-biofilm mechanism of anti-bacterial adhesion coatings with different wet resistance properties has not been explored in detail. In this work, SiOx micro–nano particles were prepared by the Stöber method and were in situ modified. The SiOx/waterborne polyurethane (WPU) coatings were prepared by the drop coating method, and the coatings with different hydrophobic and oleophobic properties were constructed by modifying the process conditions using SiOx micro–nano particles as the roughness construction factor. Taking the dominant spoilage bacteria of aquatic products, Shewanella putrefaciens as the object, the anti-bacterial adhesion properties and anti-biofilm mechanism of the SiOx/WPU coatings were investigated. The results show that, with the unmodified SiOx particles increasing from 1.2% (w/V) to 4.0% (w/V), the hydrophobicity and thermal stability of the SiOx/WPU coatings are significantly enhanced, but the oil repellency becomes worse due to the mesoporous structure. After SiOx micro–nano particles are modified with 1H,1H,2H,2H-perfluorooctyl trichlorosilane (PFOTS), the surface energy of the SiOx/WPU coatings is decreased, the liquid repellency is improved, and the surfaces are rough with the appearance of fluorocarbon compounds, but the thermal stabilities are slightly reduced. Among them, after the secondary modification of SiOx micro–nano particles, the SiOx/WPU coatings showed excellent oil repellency, lower surface energies and higher fluorocarbon content on the surface. Particularly, SiOx/WPU coatings exhibited super-amphiphobicity after adjusting the amount of concentrated ammonia added during the secondary modification process. Meanwhile, we found that for the hydrophobic SiOx/WPU coatings, the stronger the oleophobic property, the greater the anti-bacterial adhesion ability is, while the anti-bacterial adhesion ability of hydrophobic and selectively oleophobic or superhydrophobic and oleophobic SiOx/WPU coatings is poor than that of amphiphilic SiOx/WPU coatings. However, because the super-amphiphobic SiOx/WPU coatings can be in the Cassie state with the bacterial solution for a long time, it can “capture” enough air to inhibit the irreversible adhesion of the bacteria. More importantly, the coatings can also inhibit the metabolic activity, secretion of extracellular polysaccharides, and activities of ATPase and AKP of the adherent bacteria, so it has a better anti-biofilm property. The anti-biofilm coatings can be used as food packaging materials or coated on the inner surface of packaging boxes to prevent the microbial infection.
研究领域:
材料科学
·
生物材料
·
涂层技术
·
微生物学
·
食品科学
✓ 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）