Modification of Hydrotalcite Loading Tannic Acid with Organic Silane and Application in Anticorrosive Epoxy Coating

IF 2.5 4区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY
Dr. Bui Minh Quy, Assoc. Prof. Dr. Nguyen Thuy Chinh, Nguyen Thi Kim Anh, Vu Thi Tuyet, Nguyen Xuan Thai, Assoc. Prof. Dr. Vu Quoc Trung, Ngo Thi Cam Quyen, Dr. Nguyen Ngoc Tan, Prof. Dr. Thai Hoang
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Abstract

Metal corrosion is a challenge for the world with heavy impacts on the economy. Study on the development of effectiveness anticorrosion additives is a promising strategery for the protection industry. This research focuses on the modification of hydrotalcite Mg−Al (HT) loading tannic acid (TA) with 3-(trimethoxy silyl) propyl methacrylate organo-silane (TMSPM) for applicating as an anti-corrosion additive for epoxy coating on the steel substrate. The suitable ratio of HT and modifiers was investigated and the suitable content of modified HT in epoxy matrix was found based on mechanical properties of the epoxy-based coating. The characteristics of modified HT were assessed through infrared (IR) spectroscopy, X-ray diffraction pattern (XRD), scanning electron microscopy (SEM), thermal gravimetry analysis (TGA), water contact angle (WCA), dynamic light scattering (DLS). Detailly, HT-TA3-S3 shows good stability in distilled water when HT/TA was modified with TMSPM which makes Zeta potential decreases significantly. Besides, SEM analysis presented HT-TA-S has a cylindrical shape about of 500 nm. Moreover, the crystallite size of HT/TA after being modified by TMSPM decreases sharply. All of these prove successfully synthesize HT loading TA with modified TMSPM. Water contact angle (WCA) decreases in case of loading TA and increases in case of modifying with TMSPM (WCA changed from HT (116.3°) to HT-TA (102.4°) and HT-TA-S (120.1°) which indicates the increased hydrophobicity of the sample. The obtained results showed HT/TA was modified successfully with TMSPM. The modification affected the size distribution and surface properties of HT nanoparticles while it did not impact on the crystal structure of HT. After incorporating modified HT/TA into the epoxy coating, the adhesion of coating to steel substrate was improved significantly. Consequently, the adhesion of epoxy/3 wt. % modified HT/TA coating was increased 3 times as compared to epoxy neat (from 0.76 MPa to 2.77 MPa). In addition, the relative hardness and gloss retention of epoxy/3 wt. % modified HT/TA coating reached the maximum values as compared to the others. Owing to salt spraying results, the epoxy/3 wt. % modified HT/TA exhibited an excellent anticorrosion ability for the steel substrate. All the above results show the potential of HT nanoparticles loading TA modified with TMSPM as anticorrosive additives for protective coatings on steel substrates.

Abstract Image

Abstract Image

用有机硅烷对负载单宁酸的水滑石进行改性并将其应用于环氧防腐涂料。
金属腐蚀是全球面临的一项挑战,对经济造成严重影响。研究开发有效的防腐添加剂是保护工业的一项有前途的战略。本研究的重点是用 3-(三甲氧基硅基)丙基甲基丙烯酸酯有机硅烷(TMSPM)对负载单宁酸(TA)的水滑石镁铝(HT)进行改性,以用作钢基材环氧涂层的防腐蚀添加剂。研究了 HT 和改性剂的合适比例,并根据环氧基涂层的机械性能找到了改性 HT 在环氧基体中的合适含量。通过红外光谱(IR)、X 射线衍射图样(XRD)、扫描电子显微镜(SEM)、热重分析(TGA)、水接触角(WCA)和动态光散射(DLS)评估了改性 HT 的特性。结果表明,当 HT/TA 经 TMSPM 改性后,HT-TA3-S3 在蒸馏水中表现出良好的稳定性,Zeta 电位显著降低。此外,SEM 分析表明 HT-TA-S 具有约 500 nm 的圆柱形。此外,经 TMSPM 改性后,HT/TA 的晶粒尺寸也急剧下降。所有这些都证明用改性 TMSPM 成功合成了负载 TA 的 HT。水接触角(WCA)在负载 TA 的情况下减小,而在用 TMSPM 改性的情况下增大(WCA 从 HT(116.3°)变为 HT-TA(102.4°)和 HT-TA-S(120.1°),这表明样品的疏水性增加了。结果表明,TMSPM 成功改性了 HT/TA。改性影响了 HT 纳米粒子的尺寸分布和表面特性,但对 HT 的晶体结构没有影响。在环氧涂层中加入改性 HT/TA 后,涂层与钢基材的附着力显著提高。因此,环氧/3 wt. % 改性 HT/TA 涂层的附着力比纯环氧涂层提高了 3 倍(从 0.76 MPa 提高到 2.77 MPa)。此外,环氧/3 wt.%改性 HT/TA 涂层的相对硬度和光泽保持率也达到了最大值。盐雾测试结果表明,环氧/3 wt.%改性HT/TA对钢基材具有优异的防腐能力。所有上述结果都表明,添加了 TMSPM 改性的 HT 纳米粒子的 TA 具有作为防腐添加剂用于钢基材保护涂层的潜力。
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来源期刊
ChemistryOpen
ChemistryOpen CHEMISTRY, MULTIDISCIPLINARY-
CiteScore
4.80
自引率
4.30%
发文量
143
审稿时长
1 months
期刊介绍: ChemistryOpen is a multidisciplinary, gold-road open-access, international forum for the publication of outstanding Reviews, Full Papers, and Communications from all areas of chemistry and related fields. It is co-owned by 16 continental European Chemical Societies, who have banded together in the alliance called ChemPubSoc Europe for the purpose of publishing high-quality journals in the field of chemistry and its border disciplines. As some of the governments of the countries represented in ChemPubSoc Europe have strongly recommended that the research conducted with their funding is freely accessible for all readers (Open Access), ChemPubSoc Europe was concerned that no journal for which the ethical standards were monitored by a chemical society was available for such papers. ChemistryOpen fills this gap.
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