Intelligent pigments and plastics for CO2 detection
نویسندگان
چکیده
Fig. 1 Colour change of CO2-sensing pigment exposed to 100% CO2. A number of optical indicators have been developed in recent years to detect the presence of CO2 at different levels, depending on the desired application. The majority of CO2 indicators work via the change in pH which occurs when CO2 dissolves in water. A pH-sensitive dye, D , changes colour when it reacts with the protons generated from the dissolution of CO2 in water, i.e.,
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