谢轩宇,曹茜,曾鲜,程旭东.TEOS对有机硅基耐高温热控涂层的性能影响[J].表面技术,2024,53(20):175-182.
XIE Xuanyu,CAO Qian,ZENG Xian,CHENG Xudong.Effect of TEOS on the Properties of Silicone Based High Temperature Resistant Thermal Control Coatings[J].Surface Technology,2024,53(20):175-182
TEOS对有机硅基耐高温热控涂层的性能影响
Effect of TEOS on the Properties of Silicone Based High Temperature Resistant Thermal Control Coatings
投稿时间:2023-10-17  修订日期:2024-03-05
DOI:10.16490/j.cnki.issn.1001-3660.2024.20.015
中文关键词:  SiO2/有机硅复合  溶胶-凝胶法  太阳吸收比  半球发射率  有机涂料
英文关键词:organic/inorganic hybrid  sol-gel method  solar absorption ratio  hemispherical emissivity  organic coating
基金项目:国家自然科学基金(52006159)
作者单位
谢轩宇 武汉理工大学,武汉 430000 
曹茜 武汉理工大学,武汉 430000 
曾鲜 武汉理工大学,武汉 430000 
程旭东 武汉理工大学,武汉 430000 
AuthorInstitution
XIE Xuanyu Wuhan University of Technology, Wuhan 430000, China 
CAO Qian Wuhan University of Technology, Wuhan 430000, China 
ZENG Xian Wuhan University of Technology, Wuhan 430000, China 
CHENG Xudong Wuhan University of Technology, Wuhan 430000, China 
摘要点击次数:
全文下载次数:
中文摘要:
      目的 研究不同组分有机硅基耐高温热控涂层的微观结构及光谱吸收/发射性能的演变规律,揭示涂层成分对涂层性能的影响机制。方法 以正硅酸四乙酯、甲基三乙氧基硅烷、二甲基二乙氧基硅烷、3-(异丁烯酰氧)丙基三甲氧基硅烷为基料原料,以TiO2、云母为功能颜料,采用溶胶-凝胶法通过有机、无机杂化得到一种耐高温热控涂层,并对涂层的物相、表面微观结构、光学性能和热稳定性进行了测试表征。结果 所制得的热控涂层均具有较低的太阳吸收比以及较高的半球发射率,当TEOS物质的量比为8时,涂层具有最低的太阳吸收比和最高的半球发射率,其值分别为0.209和0.901。涂层在600 ℃高温下,Si—O—Si转变为SiO2,部分涂层表面出现微裂纹,但未与基体脱落。TEOS物质的量比为8的涂层经高温处理后的太阳吸收比最小,半球发射率最大,其值分别为0.169和0.894。结论 室温固化后涂层的太阳吸收比和半球发射率与TEOS的含量有关,太阳吸收比随着TEOS含量的增多而减少,半球发射率随着TEOS含量增多而增大。并且涂层的热稳定性随着TEOS含量的增多而增大。
英文摘要:
      The work aims to study the evolution of microstructure and spectral absorption/emission properties of different components of organosilicon-based thermal control coatings, and reveal the effect mechanism of coating components on coating properties. The organic/inorganic hybrid binder was prepared by sol-gel method with tetraethyl orthosilicate, methyl triethoxysilane, dimethyl diethoxysilane, 3- (isobutylloxy) propyl trimethoxysilane as raw materials. A high temperature resistant thermal control coating was prepared with TiO2 as pigment and mica as functional filler. At the same time, the coating without pigment filler was used as the control group to carry out comparative test. The experimental results showed that the low solar absorption ratio and high hemispherical emissivity of the coating were caused by the combination of the substrate and the pigment, and the pigment had a higher contribution to the solar absorption ratio of the coating, but less contribution to the hemispherical emissivity. However, the content of TEOS in the substrate also affected the variation trend of solar absorption ratio and hemispherical emissivity. The higher the content of TEOS, the lower the solar absorption ratio and the higher the hemispherical emissivity. This was because the increase of TEOS content reduced the refraction coefficient of the binder, resulting in the increase of the reflectivity of the coating, which led to the increase of the solar absorption ratio, while the increase of the hemispherical emissivity was because the increase of TEOS content led to the increase of the coating porosity, which was conducive to the absorption of the corresponding infrared wavelength, and the hemispherical emissivity increased. The phase, surface microstructure, optical property and thermal stability of the coating were studied by means of FTIR and SEM. The FTIR results showed that the synthetic material mainly contained Si—O—Si bonds, and small organic molecules were successfully grafted on the main chain. The binder was successfully prepared. SEM results showed that the surface of the coating cured at room temperature was smooth and intact. When the molar ratio of TEOS was 8, the coating had the lowest solar absorption ratio and the highest hemispherical emissivity, with values of 0.209 and 0.901, respectively. At 600 ℃, FTIR results showed that the organic components of the coatings decomposed. The SEM results showed that the coating surface with molar ratios of 5 and 6 was defective, while the coating surface with molar ratios of 7 and 8 was intact and did not fall off with the substrate. The thermal stability of the coating increased with the increase of TEOS content. When the molar ratio of TEOS was 8, the thermal stability of the coating was the highest. The solar absorption ratio and hemispherical emissivity of the coating after curing at room temperature are related to the content of TEOS. The solar absorption ratio decreases with the increase of TEOS content, and the hemispherical emissivity increases with the increase of TEOS content. The thermal stability of the coating increases with the increase of TEOS content.
查看全文  查看/发表评论  下载PDF阅读器
关闭

关于我们 | 联系我们 | 投诉建议 | 隐私保护 | 用户协议

您是第23615761位访问者    渝ICP备15012534号-3

版权所有:《表面技术》编辑部 2014 surface-techj.com, All Rights Reserved

邮编:400039 电话:023-68792193传真:023-68792396 Email: bmjs@surface-techj.com

渝公网安备 50010702501715号