| 摘要 |
PURPOSE:To obtain a heat storage material without any fear of run off upon supercooling, by adding an excess water to a mixture of sodium acetate trihydrate with xanthan gum. CONSTITUTION:A heat storage material is formed by adding excess water in an amount equivalent to 5-10pts.wt. per 100pts.wt. sodium acetate trihydrate to a mixture of 100pts.wt. sodium acetate with 0.1-10pts.wt. xanthan gum. The trihydrate used has a large latent heat in a phase change. It can be produced usually by neutralizing acetic acid with sodium hydroxide or sodium carbonate or by adding sodium sulfate to calcium acetate, filtering the mixture and evaporating the filtrate to yield sodium acetate trihydrate. It is preferable that said excess water used is distilled water. |
