An example article includes a substrate and a coating applied to the substrate. The coating includes a stabilizer and an organic phosphonic acid reactant. In an example article, the coating includes a water-soluble polymer and an organic phosphate or phosphonate reactant. An example coating configured to be applied to a basic gas filter substrate includes a water-soluble polymer and an organic phosphate or phosphonate reactant. An example technique includes applying a coating to a substrate and heating at least the coating to a temperature between about 100° C. and about 275° C. for about 1 minute to about 10 minutes. An example system includes a basic gas filter including a coating, and a sensor configured to sense an optical change in the coating.
示例物品包括基底和涂在基底上的涂层。涂层包括稳定剂和有机
膦酸反应物。在一个实例中,涂层包括
水溶性聚合物和有机
磷酸或
膦酸反应物。配置用于基本气体过滤器基材的涂层示例包括
水溶性聚合物和有机
磷酸或
膦酸反应物。一种示例技术包括将涂层涂覆到基质上,并至少将涂层加热到约 100 摄氏度至约 275 摄氏度之间的温度约 1 分钟至约 10 分钟。一个示例系统包括一个包括涂层的基本气体过滤器和一个传感器,传感器被配置为感测涂层中的光学变化。