| 摘要 |
A preparation method of an egg with silver nano particles adhered to its eggshell is provided to uniformly coat the eggshell with the silver nano particles by using the expansion/contraction of egg due to heat. An egg with silver nano particles adhered to its eggshell is prepared by: coating the surface of an eggshell with silver nano water, and then drying it to adhere silver nano particles to the eggshell. The adhesion method of silver nano particles comprises the deep-coating step of: soaking an egg in silver nano water, and then drying. The deep-coating step comprises: soaking an egg heated to 40~60°C in the silver nano water(cooled to 10°C) for 20~60sec, while supplying air bubbles to the silver nano water; taking out the egg, and naturally dropping the silver nano water; drying the surface of the eggshell for its water content to reach 10% or less by a dryer at 45°C; and repeating the drying process 1~3times. The adhesion method further comprises the step of: spraying silver nano water on the surface of the eggshell with adhered silver nano particles, and then drying.
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