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魔獸飼育學 ─ 造出自己的小寵物

魔法分子料理

一顆顆晶瑩剔透的粉圓,是夏天喝飲料或吃剉冰的最佳良伴!現在,運用一些化學溶液和色素,你也可以輕鬆做出五顏六色的化學粉圓或麵條,不過要記得,實驗品是不能食用的唷!

我們會需要:

  • 海藻酸鈉
  • 耐鹼性色液或色素
  • 量杯
  • 透明杯
  • 乳酸鈣
  • 塑膠湯匙、小紙碟
  • 滴管、細攪拌棒

一起動手跟著做:

  1. 用量匙取0.5 g的海藻酸鈉粉,放入30 cc的小杯子中
  2. 在30 cc的小杯子中倒入25 cc的水,用攪拌棒攪拌均勻 (因海藻酸鈉溶液需要靜置半小時等待溶解喔~)
  3. 選擇自己喜歡的顏色,在海藻酸鈉水溶液中滴入2滴耐鹼性色液
  4. 用攪拌棒將色素與海藻酸鈉水溶液混和均勻
  5. 接著用量匙取1g的乳酸鈣粉,加到150 cc透明杯中
  6. 再用150 cc量杯取100 cc的水,加到150 cc透明塑膠杯(厚殼)中,繼續攪拌均勻
  7. 以滴管吸取30 cc小杯子中的彩色海藻酸鈉水溶液
  8. 緩緩滴入裝有乳酸鈣水溶液的150 cc透明塑膠杯(厚殼)中,就可以看到粒粒分明的彩色粉圓產生囉!
  9. 使用塑膠湯匙將粉圓撈出水面,將成品放到小碟子中觀察。
  10. 取出碟子中的彩色粉圓,用手指捏捏看,會發現彩色粉圓外層是薄膜,中間為流動的液體

※注意:化學粉圓是不可食用的唷!

《闖關成功小秘訣》

  1. 滴入海藻酸鈉時,滴管不要碰到乳酸鈣水溶液液面,以免影響反應喔 !
  2. 海藻酸鈉與水的比例建議為1:50、乳酸鈣與水的比例為1:100

你有所不知:
海藻酸鈉是一種高分子聚合物,當海藻酸鈉滴入乳酸鈣中,鈣離子會取代海藻酸鈉中的納離子進行了「交聯反應」,此交聯作用使分子間結構更為穩固,流動性降低產生固化的效果,形成一種半透膜。

仔細觀察化學粉圓,可以發現,只有外圍是固態的,裡面仍是海藻酸鈉溶液,也就是凝固後形成的半透膜包住了內部尚未反應的海藻酸鈉溶液。隨著海藻酸鈉在乳酸鈣溶液中浸泡的時間增長,海藻酸鈉產生交聯反應的範圍變大,整顆粉圓就會形成固態狀。

*資料來源自 科思創科教顧問 許良榮教授 NTCU科學遊戲實驗室

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    本來空白的紙,抹上一種神奇的液體後,竟然會慢慢地浮現字跡…難道這就是傳說中的藏寶圖?

  • 紙花開了

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