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【答案】应助回帖
wuyao118(金币+15, 翻译EPI+1): 2011-05-07 20:56:22
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With the reaction temperature elevating, [Y (en) 2] 2 + is broken down into ethylenediamine and Y ion, then ethylenediamines react with carbon disulfide (2) (CS2 can pass through the oil film), however, Y ions react with H2S which is generated by reaction(3)to furnish X crystal nucleus on the interface between water and nucheus, which leads to the formation of the hollow microsphere, the formation process is shown in figure 3-7. Due to the different surface free energy of different crystal surface, the crystal nuclus tends to grow in the same direction. Finally, the Y nano piece will be formed. [54]These nano pieces can absorpt to the interface between water and nucleus. They can also self-assemble into hedegehog shape hollow microsphere. Thereby their surface free energy is reduced, and the most stable structure is formed. |
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