Preparation and performance of solvent-free fluorine and silicone modified epoxy coatings

doi:10.16085/j.issn.1000-6613.2020-1851

Abstract

Abstract:

Fluorinated amino silicone oil (FAS) was prepared by modifying amino silicone oil (AS) with tridecafluorooctyl methacrylate (TFM), and epoxy resin (EP) was modified with FAS. The effects of amino silicone oil and fluorinated amino silicone oil on the properties of epoxy coating were discussed. The modification results were characterized by FTIR. The flexibility, adhesion, hardness, impact resistance, heat resistance, hydrophobicity, weather resistance and corrosion resistance of the coating were evaluated by flexibility test, circle drawing adhesion test, pencil hardness test, impact resistance test, contact angle test, UV accelerated aging test and Tafel polarization curve test. The coating fracture surface was analyzed by SEM and the surface element of the coating was analyzed by EDS. When the epoxy resin was modified by fluorinated amino silicone oil with 15% fluorine content, compared with EP coating, EP modified by fluorosilicone coating’s hardness was increased from 2H to 3H and the adhesion was improved from grade 2 to grade 1. The flexibility was increased from 1mm to 0.5mm and the impact resistance was enhanced from 45cm to 50cm. The heat resistance was enhanced and the contact angle was increased from 70.5° to 123°. The UV aging resistance (432h) was increased from grade 3 to grade 1, while E_corr shifted positively from -0.6187V to -0.1720V and I_corr decreased from 1.9858×10^-8A/cm² to 3.7125×10^-10A/cm². The mechanical properties, weather resistance and corrosion resistance of the epoxy coating were significantly improved by the introduction of appropriate amount of fluorinated amino silicone oil.

Key words: epoxy resin, coating, corrosion, fluorosilicone modification, composite

摘要：

采用甲基丙烯酸十三氟辛酯（TFM）改性氨基硅油（AS）制备氟化氨基硅油（FAS），并用其改性环氧树脂（EP）探究氨基硅油及氟化氨基硅油添加量对环氧涂层性能的影响。本文通过红外光谱对改性结果进行表征，通过柔韧性测试、画圈附着力测试、铅笔硬度测试、耐冲击测试、热失重测试、接触角测试、紫外加速老化实验和Tafel极化曲线测试，分别评价涂层的柔韧性、附着力、硬度、耐冲击性、耐热性、疏水性、耐候性和防腐性能，通过扫描电镜对涂层断面进行分析，并通过EDS对涂层进行表面元素分析。结果表明，氟添加量为15%制备氟化氨基硅油改性环氧树脂时，氟硅改性EP涂层相对于未改性EP涂层，硬度由2H提升至3H，附着力由2级提升至1级，柔韧性由1mm提升至0.5mm，耐冲击由45cm提升至50cm，热稳定性增强，接触角由70.5°提升至123°，耐紫外老化（432h）由3级提升至1级，E_corr由-0.6187V正移至-0.1720V，I_corr由1.9858×10^-8A/cm²减小至3.7125×10^-10A/cm²。适量氟化氨基硅油的引入，显著提升了环氧涂层的机械性能、耐候性能和防腐性能。

关键词: 环氧树脂, 涂层, 腐蚀, 氟硅改性, 复合材料

CLC Number:

TQ630.7

YAO Jiuti, WEI Ming, LIU Xiaofang, HU Ke, YE Tong, DONG Qunfeng, YANG Lifeng. Preparation and performance of solvent-free fluorine and silicone modified epoxy coatings[J]. Chemical Industry and Engineering Progress, 2021, 40(8): 4421-4427.

姚久提, 魏铭, 刘晓芳, 胡可, 叶桐, 董群锋, 杨立峰. 氟硅改性无溶剂环氧涂料的制备与性能[J]. 化工进展, 2021, 40(8): 4421-4427.

Figures/Tables 13

References 23

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样品名	AS/g	E51/g	产率/%
EP	0.00	60.00	—
5%-ASEP	3.00	60.00	90.12
10%-ASEP	6.00	60.00	89.78
15%-ASEP	9.00	60.00	90.15
20%-ASEP	12.00	60.00	89.04
25%-ASEP	15.00	60.00	89.23

样品名	AS/g	E51/g	产率/%
EP	0.00	60.00	—
5%-ASEP	3.00	60.00	90.12
10%-ASEP	6.00	60.00	89.78
15%-ASEP	9.00	60.00	90.15
20%-ASEP	12.00	60.00	89.04
25%-ASEP	15.00	60.00	89.23

样品名	TFM/g	AS/g	产率/%
5%-FAS	0.50	10.00	91.12
10%-FAS	1.00	10.00	89.76
15%-FAS	1.50	10.00	92.71
20%-FAS	2.00	10.00	93.35
25%-FAS	2.50	10.00	90.75

样品名	TFM/g	AS/g	产率/%
5%-FAS	0.50	10.00	91.12
10%-FAS	1.00	10.00	89.76
15%-FAS	1.50	10.00	92.71
20%-FAS	2.00	10.00	93.35
25%-FAS	2.50	10.00	90.75

样品名	产率/%
5%-FASEP	91.56
10%-FASEP	90.87
15%-FASEP	93.10
20%-FASEP	93.21
25%-FASEP	92.25