面漆對鎳鈦黃建筑節能涂層性能的影響

楊光，鄧安仲*

（中國人民解放軍陸軍勤務學院，重慶 401331）

面漆對鎳鈦黃建筑節能涂層性能的影響

楊光，鄧安仲*

（中國人民解放軍陸軍勤務學院，重慶 401331）

將鎳鈦黃顏料與苯丙乳液混合制備了建筑節能涂層，并涂覆上硅溶膠和苯丙乳液制備的面漆。采用紫外/可見/近紅外分光光度計、接觸角測量儀、紅外輻射率測量儀、精密色差儀和氙燈老化箱探究了不同硅溶膠添加量所制面漆對建筑節能涂層性能的影響。結果表明，涂覆面漆不會改變建筑節能涂層的外觀，而且硅溶膠與苯丙乳液比例適當的面漆有助于提高其性能。當硅溶膠與苯丙乳液的質量比為2∶1時，涂層體系的太陽光反射比、水接觸角、附著力、鉛筆硬度、柔韌性和沖擊強度分別為0.7845、120.3°、6.54 MPa、3H、4 mm和65 kg·cm，耐沾污性、耐老化性和耐水性明顯提高。

建筑節能涂層；面漆；太陽光反射比；水接觸角；耐老化性

Abstract:An energy-efficient architectural coating was prepared by mixing styrene–acrylic emulsion with nickel titanium yellow as pigment, and then covered with a topcoat, which was prepared from silica sol and styrene–acrylic emulsion.The effects of the topcoats containing different amounts of silica sol on properties of the energy-efficient architectural coating were studied by ultraviolet/visible/near infrared spectrophotometer, contact angle meter, infrared radiometer, precision colorimeter and xenon arc lamp weatherometer.The results showed that the topcoat doesn’t change the appearance of the energy-efficient architectural coating, but helps to improve its performance when the silica sol and styrene–acrylic emulsion are mixed with a suitable proportion.The coating system with a topcoat prepared with silica sol and styrene–acrylic emulsion at a mass ratio of 2:1 features a total solar reflectance of 0.7845, water contact angle of 120.3°, adhesion strength of 6.54 MPa,pencil hardness of 3H, flexibility of 4 mm, impact resistance of 65 kg·cm, as well as enhanced resistance to stain, aging and water.

Keywords:energy-efficient architectural coating; topcoat; solar reflectance; water contact angle; aging resistance

First-author’s address:Army Logistics University of PLA, Chongqing 401331, China

建筑節能涂料主要應用在建筑外墻、屋頂等部位，它能夠被動地減少外部熱量向建筑內部傳導，從而降低室內溫度，達到降低能耗的目的[1-2]。為增強建筑節能涂層的反射、隔熱等性能，研究人員做了大量試驗。馮夢萍[3]通過分析太陽輻射模型和建筑外表面熱作用，闡述了建筑用反射隔熱涂料的隔熱機理，為評估涂刷此類涂層的建筑的節能效果提供了一定的理論支持。沈航[4]通過使用特殊顏填料以及設計涂層結構來改進多彩仿石涂料體系，使其具有一定的反射隔熱性能，拓寬了水性多彩涂料的應用范圍，并探究了基材處理、底涂、色點、顏料等因素對涂層性能的影響。……