A multi-responsive chromic textile was conveniently fabricated by screen-printing with a covalent organic polymer of viologen (COP²⁺) on the surface of cotton fabric, which was endowed with ammonia sensing, photochromic and thermochromic capabilities. The COP²⁺ coated fabric (CCF) were characterized by Fourier transform infrared spectroscopy, X-ray diffraction and scanning electron microscopy. The coating treatment endowed the fabric with fast response to ammonia gas, ultraviolet light and heat without compromising its breathability, flexibility, and comfortability. The color of CCF turned from yellow to green instantly when exposed to ammonia gas and quickly returned yellow when removed from the stimulus. The reversible color transition process can also be induced by UV light (exposure for 10 s) or heat (110 °C) and is cyclable. This durable multi-responsive textile has great potential to be used as flexible sensor for environmental monitoring.

中文翻译：

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用紫罗兰色聚合物丝网印刷的智能棉织物：光致变色，热致变色和氨感测

通过在棉织物表面上丝网印刷含紫罗兰的共价有机聚合物（COP ²⁺），可以方便地制造出具有多种响应能力的含铬纺织品，这种纺织品具有氨感测，光致变色和热致变色功能。缔约方大会²⁺通过傅里叶变换红外光谱，X射线衍射和扫描电子显微镜对涂层织物（CCF）进行了表征。涂层处理使织物对氨气，紫外线和热量具有快速响应，而不会损害其透气性，柔韧性和舒适性。当暴露于氨气中时，CCF的颜色会立即从黄色变为绿色，而从刺激物上去除后，很快就会返回黄色。可逆的颜色过渡过程也可以由紫外线（暴露10 s）或加热（110°C）引起，并且可循环使用。这种耐用的多响应纺织品具有巨大的潜力，可用作环境监测的柔性传感器。