動力沙的科學：高分子塗層讓沙子變超酷！ The Science Behind Kinetic Sand: How Polymers Make Sand So Cool!

家中的玩具其實也蘊藏著滿滿的科學知識！
你知道為什麼動力沙不會黏得到處都是嗎？這與動力沙表面的高分子塗層有關，這種塗層具有疏水性，讓動力沙能保持鬆軟，乾爽不黏手。且聚合物之間有些微吸引力，可以輕鬆捏成形狀，但吸引力不大，所以容易散開。
Ever wondered why kinetic sand sticks together but doesn’t create a sticky mess?
It has to do with the polymer coating on the surface of the sand. This coating is hydrophobic, which helps the sand stay soft, dry, and non-sticky. Additionally, there is a slight attraction between the polymers, allowing the sand to be easily molded into shapes, but the attraction isn't strong enough, so it easily falls apart.
#兒童科學 #科學小實驗 #科學教育 #KidsScience #steamathome #kidsactivities
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