JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
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2023
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IF 2.3
Ning Li,Xiaoyu Zhang,Yuxi Zhang,Guorui Wang,Ruotong Wang,Chi Zhang,Fanglei Zeng,Hailong Liu,Gang Yi,Zhongwei Wang
In order to improve the poor hydrophobicity and single repair conditions of traditional self-healing polyurethane coatings, prepolymers were synthesized with bio-based polyol castor oil (CO), self-made alkyl aryl modified silicone polyols (Si-OH) and isophorone diisocyanate (IPDI), and 4,4'-dithiodianiline (ODD) was used as chain extender containing dynamic disulfide bond, 4-methylumbelliferone (4-MU), as a bio-based end capping agent with reversible ring structure, was polymerized step by step to prepare a photothermal responsive bio-based superhydrophobic self-healing poly(siloxane-urethane) coating (PUSi). In this paper, the effect of the amount of alkyl aryl modified silicone polyol (Si-OH) on the properties of PUSi was studied. The results showed that PUSi with different alkyl aryl modified silicone polyol additions could achieve self-healing under heating, UV irradiation and infrared light irradiation, and the maximum repair efficiency could reach 91% through optical microscope (OM), 3D profilometer and universal testing machine; The contact angle meter proved that the introduction of alkyl aryl modified silicone polyol greatly improved the hydrophobicity of PUSi, and the maximum water contact angle was 162°. The coating has broad application prospects in the fields of self-cleaning fabrics, super hydrophobic surfaces, special protective clothing and so on.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
Journal of Central South University
·
2024
·Vol. 31
·期 10
·3447-3462
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IF 3.7
Kang Qian-qian,Mao Zhi-peng,Peng Li-ming,Myronyuk Oleksiy,Li Wei-hua,Wang Wei
Herein, a novel composite coating with excellent self-healing and corrosion resistance activated by photothermal responsive hollow core-shell nanofillers was developed. A photothermal nanofiller (Co 9 S 8 @Bi 2 S 3 ) with a hollow core-shell structure was synthesized and then added to polyurethane (PU) to prepare PU-Co 9 S 8 @Bi 2 S 3 composite coating. Applying 808 nm near-infrared irradiation induces a photothermal effect in Co 9 S 8 @Bi 2 S 3 , which subsequently initiates the reconstruction of reversible hydrogen bonds, facilitating the self-healing of coating scratches. The excellent photothermal self-healing performance of PU-Co 9 S 8 @Bi 2 S 3 coating was demonstrated by scratch tests and molecular dynamics simulations. The electrochemical impedance spectroscopy test results showed that the PU-Co 9 S 8 @Bi 2 S 3 coating has good self-healing and anti-corrosion properties. The low-frequency impedance modulus of the coating after three self-healing sessions was still close to 10 9 Ω·cm 2 after 30 d of immersion in seawater. This study provides a new strategy for developing multi-cycle self-healing coatings triggered by photothermal effects.
研究领域:
材料科学
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化学工程
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海洋防腐蚀技术
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DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2020
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IF 4.469
Jianhui Wu,Chunhua Wang,Yuanhang Xiao,Changdao Mu,Wei Lin
Polyurethane (PU) coatings are the most preferred systems in widespread applications on account of their great variability and fine-tuning of material properties. In this work, we have developed an eco-friendly antimicrobial polyurethane with natural-sourced isobornyl antifoulant side chains. A key development is the preparation of weakly amphiphilic poly(isobornyl acrylate) (PIBA) with terminal dihydroxy by thiol-ene ‘click’ reaction under UV catalysis. Then, the macro-polyol rich in isobornyl group is incorporated as a chain extender to achieve the functionalized polyurethane resin (PIBA-PU). Our study shows that the introduction of PIBA pendant long chains slightly affects the thermal behaviors of the soft and hard segments of PIBA-PU, and significantly improves the water-resistance of polyurethane coating as expected. The antibacterial and antifungal adhesion performances of the coatings are both substantially enhanced at higher content of PIBA. Leather-finishing application further indicates that PIBA-PU coated leather surfaces exhibit effective and long-lasting antifungal activity. The results suggest that functionalizing polyurethane with weakly amphiphilic acrylate long chains offers novel options for green coating design, whereby surface hydrophobicity and antimicrobial performances are both satisfactory and suitable for surface finishing.
研究领域:
材料科学
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生物医学工程
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DOI
高影响因子
Polymers
·
2021
·Vol. 13
·期 4
·573
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IF 4.329
Kejiao Li,Yuhong Qi,Yingju Zhou,Xiaoyu Sun,Zhanping Zhang
Polyurethane has a microphase separation structure, while polyethylene glycol (PEG) can form a hydrated layer to resist protein adsorption. In this paper, PEG was introduced to polyurethane to improve the antifouling properties of the polyurethane, providing a new method and idea for the preparation of new antifouling polyurethane materials. The mechanical properties, hydrophilicity, swelling degree, microphase separation and antifouling performance of the coatings were evaluated. The response characteristics of the polyurethane coatings in a seawater environment were studied, and the performance changes of coatings in seawater were tested. The results showed that the crystallized PEG soft segments increased, promoting microphase separation. The stress at 100% and the elasticity modulus of the polyurethane material also markedly increased, in addition to increases in the swelling degree in seawater, the water contact angle decreased. A total of 25% of PEG incorporated into a soft segment can markedly improve the antibacterial properties of the coatings, but adding more PEG has little significant effect. After immersion in seawater, the coatings became softer and more elastic. This is because water molecules formed hydrogen bonding with the amino NH, which resulted in a weakening effect being exerted on the carbonyl C=O hydrogen bonding and ether oxygen group crystallization.Keywords:poly(ethylene glycol)-segmented polyurethane coating;seawater immersion;microstructure;properties
研究领域:
材料科学
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海洋生物学
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DOI
PubMed
高影响因子
RSC Advances
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2017
·Vol. 7
·期 23
·13742-13748
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IF 3.108
Fuyou Lu,Baodong Song,Pei He,Zhi Wang,Jixiao Wang
Two component polyurethane coatings are widely used for materials protection. Herein, a series of acrylic polyurethane coatings were prepared by reaction of hydroxyl acrylic resin and hexamethylene diisocyanate (HDI) biuret. These coatings have different isocyanate to hydroxyl ratios (expressed as NCO/OH). The degradation process of the coatings was evaluated by electrochemical impedance spectroscopy measurement. Then, the results were analyzed using equivalent electrical circuits. Besides, the adhesion and water resistance of the coatings were also investigated. Experimental results demonstrated that the higher the NCO/OH ratios within a certain range, the better the corrosion resistance. Specifically, the coating with NCO/OH = 1.4 provided the best corrosion resistance, and its impedance modulus still remained at close to 1 × 1011 ohms per cm2 after 50 days immersion. However, the corrosion resistance of coatings with NCO/OH = 0.8 and NCO/OH = 1.0 were relatively poor. More interestingly, with the increase in NCO/OH ratios, the coating's adhesion increased slightly and the water resistance improved noticeably.
研究领域:
材料科学
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电化学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2021
·
IF 6.953
Huihui Xie,Hui Zhang,Xinxin Liu,Shenglong Tian,Yunsi Liu,Shiyu Fu
A lignin-based PU coating was prepared for paper-based green packaging. Two representative diisocyanate were used to prepare the coatings. Due to the rigid aromatic, the physical properties of the TDI system reached the maximum below the lignin content of 40%. The HDI that contains flexible aliphatic chains alleviated the brittleness of coating, and it showed physical advantages when the lignin content was more than 50%. Owing to the high lignin content, the coating presented enhanced thermal stability . After coated with the lignin-based PU coatings, the dry tensile strength of coated paper was improved by 126%. Amazingly, the wet strength was increased from 0.31 to 12.6 MPa with an improvement nearly 40 times. Based on the coordination of lignin, Ag + was introduced into the PU matrix, which imparted the coating with excellent antibacterial ability. The colony forming units of E. coli and S. aureus were both less than 1. However, no inhibition halo was observed, which indicated that the Ag was firmly anchored on the coating and the antibacterial ability is only available when the bacterial contact the coating surface. The lignin-based PU coating with favorable sustainability and properties shows great potential in paper-based green packaging fields.
研究领域:
材料科学
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环境科学
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生物学
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DOI
PubMed
高影响因子
International Journal of Electrochemical Science
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2023
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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
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防腐蚀工程
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DOI
PubMed
高影响因子
Materials Today Chemistry
·
2024
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IF 6.7
Lili Du,Jihui Hu,Mingxia Duan,Ji Ma,Zhijie Chen,Chuyuan Cui,Hao Chen,Ping Qiu
The deficiency in ion barrier capability, leading to coating failure, is a tough issue for corrosion-resistant coating. Inspired by the corrosion resistance of stainless steel, our team propose a modified p/n polyaniline heterojunction coating for carbon steel. This structure produces the built-in electric field at the p/n junction, causing cations and anions to accumulate only on either side of the depletion region, creating an effective barrier against charge transfer. The structure and morphology of the fillers are analyzed using SEM, TEM, FT-IR, and Raman spectroscopy, while their electronic structure is investigated through Mott-Schottky tests and their ion selectivity is verified through membrane potential testing. The protective performance of coating is evaluated via electrochemical impedance spectroscopy (EIS) and salt spray tests. Results show that after 200 days of immersion, the impedance modulus |Z|@ 0.01 Hz of the p/n-PANI Coating remains at 10 10 Ω cm 2 , four orders of magnitude higher than Pure PUA. The pull-off test indicates the p/n-PANI Coating achieves the highest adhesion strength at 11.55 MPa after immersion in 3.5 wt% NaCl solution for 200 days. Further analysis of the ion impermeability of coatings using SEM and EDS reveals its exceptional protective mechanism. Overall, these findings highlight the potential of p/n-PANI Coating for marine oil and gas equipment, offering promising long-term anti-penetration and corrosion resistance.
研究领域:
材料科学
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防腐蚀工程
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DOI
高影响因子
CORROSION SCIENCE
·
2020
·
IF 6.479
Guangyi Cai,Song Xiao,Chunming Deng,Dan Jiang,Xinxin Zhang,Zehua Dong
CeO 2 nanoparticles grafted on carbon nanotubes (CNTs) with polydopamine (PDA) as interface layer (CeO 2 -PDA-CNTs) were prepared and dispersed into polyurethane (PU) to enhance the corrosion barrier of PU coating. Electrochemical impedance spectroscopy (EIS), wire beam electrode (WBE) technique and surface characterization demonstrate that CeO 2 -PDA-CNTs/PU composite coating significantly possesses the better corrosion and permeation resistance than other PU-based coatings. The barrier performance of the composite coating is mainly ascribed to the sandwiched CeO 2 -PDA-CNTs nanostructure, which achieves synergistic effect between the corrosion inhibition of CeO 2 and the bonding strength reinforcement and permeation pathway twist due to PDA wrapped CNTs.
研究领域:
材料科学
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腐蚀防护
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表面工程
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DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2024
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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
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表面化学
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产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Zhixuan Zhao,Dhandapani Kuzhandaivel,Xuan Zhou,Wudi Zhang,Yalong Yuan,Gaolong Zhang,Cheng Ke,Xiaohong Ding,Lixin Wu,Zixiang Weng
In cold environments, the driving range of electric vehicles is significantly reduced due to the high energy consumption of active de-icing systems. As a result, enhancing the passive de-icing capability of car windshields has become a focal point in both academic and industrial research in recent years. Compared to other application, deicing for car windshields requires higher standards for transparency, durability, and universality. In this work, a UV-curable, transparent superhydrophobic coating based on polyurethane was developed, aimed at anti-icing and self-cleaning applications for automotive windshields. This coating, with its active anti-icing capability, reduces the adhesion of water and ice to the glass surface, significantly lowering the energy consumption for de-icing at start-up, improving de-icing efficiency. By integrating a spray-coating method with SiO2 particles, the coating achieves a balance between high transparency and excellent hydrophobicity. The experimental results show that when the concentration of SiO2 was 1.5 wt%, the coating exhibits a contact angle of 165°, over 82 % maximum light transmittance, and an extended ice delay time by 12 times compared to pristine glass. The ice adhesion force is reduced by 15 times as well. Additionally, the coating demonstrates excellent abrasion resistance and impact resistance to water droplets, maintaining its superhydrophobic state after 102,600 water drop impacts. This coating, with its active de-icing capability, significantly reduces the de-icing energy consumption of electric vehicles during startup by minimizing the adhesion of water droplets and ice layers on the glass surface, thereby enhancing de-icing efficiency in cold climates and extending the driving range.
研究领域:
材料科学
·
表面工程
·
汽车工程
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产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2020
·
IF 7.635
Yiding Cao,Zhenzhen Liu,Bixia Zheng,Rongxian Ou,Qi Fan,Liping Li,Chuigen Guo,Tao Liu,Qingwen Wang
Sustainable thermosetting polyurethane (PU) anticorrosive coatings based on renewable biomass resources with long-lasting corrosion protection is highly desired. Herein, thermosetting lignin-based polyurethanes (LPU) coatings with superior corrosion resistance and high content of lignin were prepared by polymerization of lignin-based polyol (OH-EL) with hexamethylene diisocyanate (HDI) in absence of catalysts. In order to increase the reactivity and solubility of OH-EL when reacting with isocyanates, the phenolic hydroxyls of enzymatic hydrolysis lignin were selectively converted to primary aliphatic hydroxyls by sequential alkylation and thiol-ene reaction. Due to the well dispersion and crosslinking reactivity of OH-EL in the polyurethane networks, the resulting LPUs presented high thermal stability and excellent mechanical properties . Remarkably, LPU-3 with the content of OH-EL of 54.8 wt%, exhibited high T g of 112 °C, high char residue percentage of 26.3% at 600 °C, high tensile strength up to 81.6 MPa and tensile modulus of 1.4 GPa. Moreover, the LPU-3 coating on carbon steel substrate exhibited low corrosion current density I corr of 7.58 × 10 −11 A cm −2 , positive corrosion voltage E corr of 118 mV, and high impedance modulus |Z| 0.01Hz of 8.3 × 10 10 Ω cm 2 after immersing in 3.5 wt% NaCl solution for 0.5 h, and the |Z| 0.01Hz remained at 3.9 × 10 10 Ω cm 2 after 40 days immersion, displaying superior corrosion resistance than other reported bio-based polymer coatings . These results demonstrate that the synthesis of highly reactive lignin-based polyols based on thiol-ene chemistry is an effective and facile strategy, which is vital for the development of high-performance bio-based polyurethane anticorrosive coatings.
研究领域:
材料科学
·
化学工程
·
可再生资源利用
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）