Lecithin-encapsulated ZrO2/HEDP nanocomposites for enhanced anti-scaling and anti-corrosion PTFE coatings

IF 7.3 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings Pub Date : 2025-07-02 DOI:10.1016/j.porgcoat.2025.109503

Xiangge Chen , Wenbing Yu , Fenglei Han , Lian Xue , ZhongWei Hou , Shiyang Liu , Shaojie Guan , Xuefu Zhang

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引用次数: 0

Abstract

Tunnel drainage pipes are prone to long-term clogging due to calcite scaling and alkaline corrosion, which compromise system efficiency and structural safety. In this study, a novel protective coating was developed by incorporating lecithin-encapsulated ZrO₂/HEDP slow-release nanofillers into a PTFE matrix. The composite coating was applied onto PE substrates and evaluated using SEM, FTIR, TGA, XPS, QCM-D, electrochemical impedance spectroscopy (EIS), and adhesion testing. Results showed that the modified PTFE coating achieved ISO 2409:1992 adhesion grade 0, compared to grade 2 for pure PTFE. Electrochemical tests revealed a polarization resistance (Rp) of 6.48 × 10⁷ Ω·cm² for the modified coating, nearly twice that of the unmodified sample (3.15 × 10⁷ Ω·cm²). The QCM-D analysis indicated that calcite adsorption mass was reduced by 38.2 %, from 476.58 ng/cm² (pure PTFE) to 344.91 ng/cm² (modified PTFE), and degradation after 28-day alkaline corrosion was minimal (only 5.7 % reduction). These findings demonstrate that the incorporation of lecithin-encapsulated nanofillers significantly enhances coating durability, hydrophobicity, and anti-scaling performance under alkaline conditions. This work provides a promising strategy for developing long-lasting anti-scaling and anti-corrosion coatings for tunnel drainage systems.

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卵磷脂封装ZrO2/HEDP纳米复合材料增强抗结垢和抗腐蚀PTFE涂层

隧道排水管道容易因方解石结垢和碱性腐蚀而长期堵塞，影响系统效率和结构安全。在这项研究中，将卵磷脂封装的ZrO2/HEDP缓释纳米填料掺入PTFE基体中，开发了一种新型的保护涂层。采用SEM、FTIR、TGA、XPS、QCM-D、电化学阻抗谱（EIS）和附着力测试对复合涂层进行了评价。结果表明，与纯PTFE涂层相比，改性PTFE涂层的附着力达到ISO 2409:1992 0级。电化学测试表明，改性涂层的极化电阻（Rp）为6.48 × 107 Ω·cm2，是未改性样品（3.15 × 107 Ω·cm2）的近两倍。QCM-D分析表明，方解石吸附质量减少了38.2%，从476.58 ng/cm2（纯聚四氟乙烯）到344.91 ng/cm2（改性聚四氟乙烯），并且经过28天的碱性腐蚀后降解最小（仅减少5.7%）。这些发现表明，卵磷脂封装的纳米填料的掺入显著提高了涂层在碱性条件下的耐久性、疏水性和抗结垢性能。这项工作为开发隧道排水系统的长效防结垢和防腐涂料提供了一个有希望的策略。

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来源期刊

Progress in Organic Coatings 工程技术-材料科学：膜

CiteScore

11.40

自引率

15.20%

发文量

577

审稿时长

48 days

期刊介绍： The aim of this international journal is to analyse and publicise the progress and current state of knowledge in the field of organic coatings and related materials. The Editors and the Editorial Board members will solicit both review and research papers from academic and industrial scientists who are actively engaged in research and development or, in the case of review papers, have extensive experience in the subject to be reviewed. Unsolicited manuscripts will be accepted if they meet the journal''s requirements. The journal publishes papers dealing with such subjects as: • Chemical, physical and technological properties of organic coatings and related materials • Problems and methods of preparation, manufacture and application of these materials • Performance, testing and analysis.