Effect of cationic collector on the attachment of glass beads to a stationary bubble
Effect of cationic collector on the attachment of glass beads to a stationary bubble
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阳离子捕收剂对玻璃珠附着在静止气泡上的影响
DOI：
10.1016/j.colsurfa.2021.126979
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发表时间：
2021-09
期刊：
影响因子：
--
通讯作者：
Zhiqiang Sun
中科院分区：
文献类型：
--
作者：
Luyang Chen;Jie Wu;Zhiqiang Sun
研究了在十二烷基胺盐酸盐捕收剂溶液中，玻璃微珠与静止气泡的接触，考察了阳离子捕收剂对气泡-颗粒附着的影响。高速摄像机被用来记录气泡-颗粒相互作用的图像。在10− 5 mol/L DAH溶液中，当气泡直径为1.05-1.9 mm时，诱导时间随气泡直径的增大先减小后增大。实验表明，诱导时间随碰撞角度的增大而增大。然而，在较高的DAH浓度的解决方案中，诱导时间的分布是分散的，并观察到的跳跃事件以上的水平赤道的气泡，颗粒聚集也被观察到。当DAH浓度从10 - 5增加到10 - 3 mol/L时，诱导时间先增加后减少。对大量颗粒的附着分析证实，诱导时间与附着效率之间的相关性比接触角与附着效率之间的相关性更强。在诱导时间最大的溶液浓度下，颗粒附着效率最低。从多个角度考察了收集器对气泡-颗粒附着的影响。这项研究引入了新的见解，气泡颗粒附着，并提供了更多的，更全面的了解附着机制。
Glass beads in contact with a stationary air bubble immersed in dodecylamine hydrochloride (DAH) collector solution were investigated to examine the effects of a cationic collector on bubble–particle attachment. A high-speed video camera was used to record images of bubble–particle interactions. When the bubble diameter was 1.05–1.9 mm, the induction time initially decreased then increased as the bubble size increased in a 10−5mol/L DAH solution. Experiments demonstrated that the induction time increased as the collision angle increased. However, in solutions with higher DAH concentrations, the distribution of induction time was scattered, and the jump-in events were observed above the horizontal equator of the bubble; particle aggregation was also observed. When the DAH concentration increased from 10−5to 10−3mol/L, the induction time initially increased and then decreased. Analysis of the attachment for large numbers of particles verified that the correlation between induction time and attachment efficiency was stronger than the correlation between contact angle and attachment efficiency. At the solution concentration for which the induction time was maximum, the particle attachment efficiency was the lowest. The effects of the collector on bubble–particle attachment were examined in multi–perspectives. This study introduces new insights into the bubble–particle attachment and offers an increased, more comprehensive understanding of the attachment mechanisms.
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