Effect of Poly(vinyl alcohol) Adsorption on Binder Segregation during Drying
Effect of Poly(vinyl alcohol) Adsorption on Binder Segregation during Drying
复制标题
聚乙烯醇吸附对干燥过程中粘合剂离析的影响
DOI：
10.1111/j.1151-2916.1996.tb08141.x
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发表时间：
1996
影响因子：
3.9
通讯作者：
K. Uematsu
中科院分区：
文献类型：
--
作者：
Y. Zhang;Takehumi Suga;M. Kawasaki;Xiao;N. Uchida;K. Uematsu
通过一维干燥模型实验，定量研究了聚乙烯醇吸附对分离的影响，并用数学模型进行了模拟。结果表明，PVA在氧化铝颗粒上的吸附是一个缓慢的过程，吸附的粘结剂在较高温度下不会解吸。通过在干燥前充分吸附粘结剂，可以显著限制PVA分离。仿真结果与实验结果吻合较好。定量讨论了干燥温度、粘结剂初始浓度和试件厚度对表面偏析的影响。数学模拟在预测可溶组分在干燥过程中的偏析方面具有很大的潜力，特别是对于薄膜和小颗粒等难以直接确定组分分布的情况。
The effect of poly(vinyl alcohol) adsorption on segregation was quantitatively studied by a model experiment of one–dimension drying and simulated by a mathematical model. It was clear that the adsorption of PVA on alumina particle was a slow process, and the adsorbed binder was not desorbed at higher temperature. PVA segregation can significantly be limited by fully adsorbing the binder before drying. The simulation and experiments agreed very well. The effects of drying temperature, initial concentration of the binder, and thickness of specimen on the surface segregation are discussed quantitatively. Mathematical simulation has a great potential for predicting the segregation of soluble components during drying, especially for such cases as thin films and small granules where it is difficult to determine the distribution of the component directly.