Surface Treatment of Industrial-Grade Magnetite Particles for Enhanced Thermal Stability and Mitigating Paint Contaminants

Nanomaterials

卷:11

Mohua Sinhababu¹  Gopalkrishnan Udayabhanu¹  Senthilarasu Sundaram²  Anurag Roy²  Smagul Karazhanov³  Narendra Kumar⁴  Monojit Dutta⁵ 

[1] Department of Chemistry, Indian Institute of Technology (Indian School of Mines), Dhanbad 826004, India;

[2] Environment and Sustainability Institute, University of Exeter, Penryn Campus, Cornwall TR10 9FE, UK;

[3] Institute for Energy Technology (IFE), P.O. Box 40, 2027 Kjeller, Norway;

[4] Research & Development, Tata Pigments Limited, Boulevard, Sakchi, Jamshedpur 831002, India;

[5] Research & Development, Tata Steel Limited, Jamshedpur 831007, India;

关键词: magnetite;    thermal stability;    environmental contamination;    SHMP-treated;    XRD;    calcined;   

DOI  :  10.3390/nano11092299

来源: DOAJ

【 摘 要 】

Pigments can retain their color for many centuries and can withstand the effects of light and weather. The paint industry suffers from issues like aggressive moisture, corrosion, and further environmental contamination of the pigment materials. Low-cost, long-lasting, and large-scale pigments are highly desirable to protect against the challenges of contamination that exist in the paint industry. This exploratory study reinforces the color and thermal stability of industrial-grade (IG) magnetite (Fe₃O₄). IG Fe₃O₄ pigments were further considered for surface treatment with sodium hexametaphosphate (SHMP). This metaphosphate hexamer sequestrant provides good dispersion ability and a high surface energy giving thermal and dust protection to the pigment. Various physicochemical characterizations were employed to understand the effectiveness of this treatment across various temperatures (180–300 °C). The X-ray diffraction, Raman, and X-ray photoelectron spectroscopy techniques signify that the SHMP-treated Fe₃O₄ acquired magnetite phase stability up to 300 °C. In addition, the delta-E color difference method was also adopted to measure the effective pigment properties, where the delta-E value significantly decreased from 8.77 to 0.84 once treated with SHMP at 300 °C. The distinct color retention at 300 °C and the improved dispersion properties of surface-treated Fe₃O₄ positions this pigment as a robust candidate for high-temperature paint and coating applications. This study further encompasses an effort to design low-cost, large-scale, and thermally stable pigments that can protect against UV-rays, dust, corrosion, and other color contaminants that are endured by building paints.

【 授权许可】

Unknown