相关实验视频

Updated: Jun 13, 2025

The Evolution of Silica Nanoparticle-polyester Coatings on Surfaces Exposed to Sunlight

The Evolution of Silica Nanoparticle-polyester Coatings on Surfaces Exposed to Sunlight

Published on: October 11, 2016

生态友好型水性聚氨涂层,经过乙烯基胺功能化石墨烯氧化物修改,以提高抗腐蚀性能

Mariel Amparo Fernandez Aramayo^1,2, Rafael Ferreira Fernandes^1,2, Matheus Santos Dias^1,2

¹Mackenzie School of Engineering, Mackenzie Presbyterian University, Consolação Street 930, São Paulo 01302-907, Brazil.

Molecules (Basel, Switzerland)

|September 14, 2024

概括

用石墨烯氧化物 (GO) 增强的环保水性聚氨涂层为碳钢提供了卓越的抗腐蚀保护. 低度的GO,特别是与乙二胺功能化,通过改善屏障特性显著提高性能.

科学领域:

材料科学材料科学材料科学
腐蚀科学腐蚀科学
聚合物化学聚合物化学

背景情况:

水性聚氨 (WPU) 树脂具有水友性特性,限制了它们在要求高的抗腐蚀涂层中的应用.
开发具有强大的耐腐蚀性环保涂料是材料保护的重大挑战.

研究的目的:

研究石墨烯氧化物 (GO) 作为增强抗腐蚀涂层的WPU添加剂.
评估GO度和乙二胺 (EDA) 功能化对涂层性能的影响.
探索GO-WPU复合材料在碳钢环保防腐蚀方面的潜力.

主要方法:

将不同的GO度 (0.01,0.1,1.3%重量%) 和EDA功能化的GO纳入WPU.
在3.5%的NaCl溶液中进行潜在动力学偏振分析,以评估腐蚀参数 (Ecorr,Icorr,抑制效率).
拉曼成像和紫外线/凝结试验,以评估涂层形态,分散和长期耐用性.

主要成果:

用EDA (GO-EDA) 功能化的低度0.01%重量%的GO显示出了特殊的抗腐蚀性能.
最佳的0.01%重量%的GO-EDA配方实现了高腐蚀潜力 (Ecorr = -117.82 mV),低电流密度 (Icorr = 3.70 × 10^-9 A cm^-2) 和99.60%的抑制效率.
过度的GO含量导致聚合,损害了屏障特性,而0.01%重量%的GO-EDA涂层在UV/凝结试验中显示出最小的腐蚀.

结论:

石墨烯氧化物,特别是当与EDA功能化时,显著增强了水性聚氨涂层的抗腐蚀性能.
优化的GO分散和交叉连接对于优越的屏障性能和耐腐蚀性至关重要.
基于GO的WPU涂层代表了可持续和有效的腐蚀防护解决方案的有希望的进步.

关键词:

具有抗紫外线的抗UV能力.抗腐蚀的方法抗腐蚀的方法涂层涂层是一种涂层.环境友好型的环保型功能化的功能化.石墨烯氧化物石墨烯氧化物添加剂含量较低的添加剂含量较低的添加剂含量耐水性耐水性耐水性在水中传播的聚氨.

更多相关视频

TiO2-coated Hollow Glass Microspheres with Superhydrophobic and High IR-reflective Properties Synthesized by a Soft-chemistry Method

TiO2-coated Hollow Glass Microspheres with Superhydrophobic and High IR-reflective Properties Synthesized by a Soft-chemistry Method

Published on: April 26, 2017

Graphene Coatings for Biomedical Implants

Graphene Coatings for Biomedical Implants

Published on: March 1, 2013

相关概念视频

Waterproofing and Anti-Bacterial Admixtures in Concrete

Waterproofing and Anti-Bacterial Admixtures in Concrete

Concrete's susceptibility to water absorption is due to the capillary action within the pores of its hydrated cement paste. This action draws water in, creating the need for waterproofing admixtures to prevent such penetration. The efficacy of these admixtures is contingent upon the water pressure, with variations arising from different conditions such as rain, capillary rise, or hydrostatic pressure in structures intended to hold water.
Waterproofing admixtures render concrete hydrophobic,...

Corrosion of Reinforcement

Corrosion of Reinforcement

The corrosion of steel reinforcement within concrete is a process influenced by the material's inherent properties and external factors. The high pH level of around 13, provided by calcium hydroxide present in concrete, initially protects the steel reinforcement by promoting the formation of a passive iron oxide layer on its surface.
However, over time and under certain conditions like carbonation, chloride ingress, and cracking this protective state can be compromised. Steel has areas with...

Corrosion

Corrosion

The degradation of metals due to natural electrochemical processes is known as corrosion. Rust formation on iron, tarnishing of silver, and the blue-green patina that develops on copper are examples of corrosion. Corrosion involves the oxidation of metals. Sometimes it is protective, such as the oxidation of copper or aluminum, wherein a protective layer of metal oxide or its derivatives forms on the surface, protecting the underlying metal from further oxidation. In other cases, corrosion is...