论文部分内容阅读
研究了在阴离子(十二烷基硫酸钠)、阳离子(十六烷基三甲基溴化铵)或非离子(吐温-60)低浓度表面活性剂存在下,己二酸在水溶液中结晶的重量分布、诱导时间及晶体各面的平均成核生长速率()。得出:离子型表面活性剂(Ⅰ)使结晶颗粒数减少,晶粒增大,而非离子型表面活性剂(Ⅱ)的作用相反;Ⅰ使结晶的诱导时间缩短,Ⅱ使之略有延长;在低过饱和度比(S)时,Ⅰ使晶体各面的下降,而在高S时,作用相反;在(110)面,Ⅱ使增大;而在(010)、(001)面,低S时,都下降,高S时,皆上升。给出了与S的数学关联式。
It has been studied that adipic acid crystallizes in aqueous solution in the presence of anionic (sodium dodecyl sulfate), cationic (cetyltrimethylammonium bromide) or nonionic (Tween-60) low concentration surfactants The weight distribution, induction time and the average growth rate of crystal nuclei (). The results showed that the ionic surfactant (Ⅰ) reduced the number of crystal particles and increased the size of the crystal particles, while the effect of nonionic surfactant (Ⅱ) was reversed; Ⅰ, the induction time of crystal was shortened and Ⅱ was slightly prolonged (Superscript nd) and (superscript nd), respectively. In the low supersaturation ratio (S), Ⅰ decreases the of each side of the crystal, ) Face, low S, all decline, high S, all rise. The mathematical relation between and S is given.