The production principle of color-changing aluminum cup
The production principle of color-changing aluminum cups mainly uses the properties of color such as thermal sensitivity, photosensitivity and chemical reaction. Each principle is described in detail below:
1. Thermal principle:
Color-changing aluminum cups use the heat-sensitive color-changing principle, when the temperature inside the cup changes, the color of the cup will change. Generally speaking, the coating of the color-changing cup is a mixture of V2O5 and VO2. When the temperature rises to a critical value, electron transfer occurs between vanadium ozonated and vanadium oxide, and vanadium ozonated becomes vanadium oxide, thus changing the coating from red to blue.
2. Principle of light sensitivity:
Another color-changing principle of the aluminum cup is the principle of photochromism. In sunlight, vanadium ozonated molecules will gradually undergo a reduction reaction and become vanadium ozone ions, so the color-changing aluminum cups appear blue or purple. When the sun is blocked or indoors, the vanadium ozonate molecules in the coating are gradually oxidized and transition to vanadium oxide, which turns the aluminum cup red or gray.
3. Principle of chemical reaction:
In addition to the principle of thermal and photochromic change, the production principle of color-changing aluminum cups also uses the principle of chemical reaction. The chemicals in the coating can react with the acids and bases in the drink, causing a change in color. For example, when aluminum cups are poured into acidic drinks, the coating will turn red, while in alkaline drinks it will turn green.
2. Use method
Using a color-changing aluminum cup is simple, just pour the drink into the cup. The following points should be noted when using:
1. color-changing aluminum cups can only be washed by hand, not by dishwasher.
2. Drink temperature should not be too high or too low, so as not to affect the discoloration effect of the cup.
3. The acidity and alkalinity of the drink have an effect on the color change of the cup, which may cause the color to become lighter or darker.
4. The cup is easy to scratch, and should be careful to avoid contact with hard objects when using.
In short, the color-changing aluminum cup is a very interesting beverage container, and its color change is the result of the interaction of several principles. In daily use, we can observe the change of color in the cup according to the characteristics of the drinks in the cup, which can not only increase the interest, but also understand the acid-base properties of the drinks to a certain extent.
