Modification of fly ash cenospheres by 3-glycidyloxypropyl trimethoxysilane (GPTMS) for anticorrosive coating applications

IF 2.4 3区化学 Q3 POLYMER SCIENCE

Iranian Polymer Journal Pub Date : 2024-07-12 DOI:10.1007/s13726-024-01359-w

Mithilesh Kogje, Siddhesh Mestry, Jyoti Darsan Mohanty, S. T. Mhaske

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Abstract

The present work focused on the functionalization of fly ash cenospheres (FACs) by GPTMS for anticorrosive applications. FACs are an industrial waste product from coal industry that possesses valuable properties such as lightweight, low water absorption, corrosion resistance, and chemical inertness. Epoxy is one of the best materials for superior corrosion performance and excellent substrate adhesion and therefore was chosen as the base matrix. 3-Glycidyloxypropyl trimethoxysilane (GPTMS) was selected as the suitable silane functionalization agent (with the variation of 2, 4, and 6 wt% of cenospheres due to its compatibility with epoxy resin). GPTMS can help corrosion control by forming dense Si–O–Si networks that act as a protective barrier against water, aggressive ions, etc. FTIR and XRD analyses studied the primary structural confirmation of silane-modified cenosphere, while the morphology was studied by SEM analysis. TGA and DTG curves investigated the thermal properties of the coatings, while EIS studies evaluated the anticorrosive attributes. The EIS results showed that the corrosion rate decreased as the percentage of silane increased in the coating, which indicates the superior anticorrosion behaviour of the 6 GPTMS FAC–epoxy sample compared to others.

Graphical abstract

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用 3-缩水甘油氧基丙基三甲氧基硅烷 (GPTMS) 改性粉煤灰仙人球，用于防腐涂层应用

本研究的重点是利用 GPTMS 对粉煤灰仙人球（FACs）进行功能化处理，以实现防腐应用。粉煤灰是煤炭工业的一种工业废料，具有轻质、低吸水性、耐腐蚀和化学惰性等宝贵特性。环氧树脂是防腐性能和基材附着力最好的材料之一，因此被选为基体。3-Glycidyloxypropyl trimethoxysilane (GPTMS) 被选为合适的硅烷官能化剂（由于其与环氧树脂的兼容性，仙人球的重量百分比为 2、4 和 6）。GPTMS 可以形成致密的 Si-O-Si 网络，对水和腐蚀性离子等起到保护作用，从而有助于腐蚀控制。傅立叶变换红外光谱（FTIR）和 X 射线衍射（XRD）分析研究了硅烷改性仙人球的主要结构确认，而扫描电镜分析则研究了其形貌。TGA 和 DTG 曲线研究了涂层的热特性，而 EIS 研究则评估了涂层的防腐特性。EIS 结果表明，随着硅烷在涂层中所占比例的增加，腐蚀速率也随之降低，这表明 6 GPTMS FAC-epoxy 样品的防腐性能优于其他样品。

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来源期刊

Iranian Polymer Journal 化学-高分子科学

CiteScore

4.90

自引率

9.70%

发文量

107

审稿时长

2.8 months

期刊介绍： Iranian Polymer Journal, a monthly peer-reviewed international journal, provides a continuous forum for the dissemination of the original research and latest advances made in science and technology of polymers, covering diverse areas of polymer synthesis, characterization, polymer physics, rubber, plastics and composites, processing and engineering, biopolymers, drug delivery systems and natural polymers to meet specific applications. Also contributions from nano-related fields are regarded especially important for its versatility in modern scientific development.