耐高温有机硅树脂示温涂层的制备

Preparation of High Temperature Resistant Silicone Resin Coating for Temperature Indication

近年来,我国的航空航天事业发展迅猛,由此对发动机涡轮机、燃烧室等高温部件的温度及分布测试提出了更高要求,其中示温漆受到广泛关注。为了解决我国航空发动机等高热部件温度测量问题,需要进一步提高示温漆的变色温度上限和显色性能。本文选用正硅酸乙酯(TEOS)、二苯基二甲氧基硅烷(DMDPS)、三甲基氧基苯基硅烷(TMPS)为原料制备TEOS杂化甲基苯基硅树脂(SR),通过调节TEOS与DMDPS比例提高树脂的柔韧性;采用七异丁基三硅羟基多面体低聚倍半硅氧烷(POSS)对所制备的增韧SR进行改性,制备出一种兼具韧性和耐高温性且可室温固化的杂化有机硅树脂,其在500℃残重达82%。选择新胭脂红、三氧化钨、三氧化二铬、氧化铁、硅酸铝等为颜料,锆英粉和三氧化硼为耐高温填料,无水乙醇为溶剂,与制备的耐高温有机硅树脂混合研磨制备耐高温示温漆,分别研究其在400、500、800、900、1000、1150及1300℃时的显色效果及显色机制。研究表明,所制备的示温漆工艺、耐高温、显色等性能较为优异,具有高温部件测温的潜能。

In recent years,the rapid development of China's aerospace industry has driven higher requirements for the temperature and distribution test of engine turbines,combustion chambers and other high temperature components,attracting widespread attention to thermo chromic paints.To address the temperature measurement challenges of high-temperature components such as aero-engine,it is necessary to further improve the upper limit of color change temperature and color display performance of temperature indicator paint.In this study,TEOS hybrid methylphenyl silicone resin(SR)was prepared by TEOS,diphenyl dimethoxy silane(DMDPS)and trimethylxy silane(TMPS).The flexibility of the resin was increased by adjusting the ratio of TEOS to DMDPS.A hybrid silicone resin with both toughness and high temperature resistance was produced by modifying the toughened SR with heptaisobutyl trisilane hydroxyl POSS that can cure at room temperature,retaining 82%of its weight at 500℃.Pigments such as new carmine,tungsten trioxide,chromium trioxide,iron oxide,aluminum silicate were selected,along with zirconium powder and boron trioxide as high temperature fillers,and anhydrous ethanol as solvent.These were mixed and ground with the prepared high-temperature resistant silicone resin to produce a high temperature indicating paint.The effect and mechanism of color display at 400,500,800,900,1000,1150 and 1300℃were analyzed.The results show that the paint achieves excellent properties in technology,high temperature resistance and color display performance,and can be used to measure the temperature of high temperature parts.