Rheological behaviors of ball-milled and wet-jet milled ZnO slurries with polyvinyl alcohol as an organic binder
Rheological behaviors of ball-milled and wet-jet milled ZnO slurries with polyvinyl alcohol as an organic binder
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以聚乙烯醇为有机粘合剂的球磨和湿喷研磨 ZnO 浆料的流变行为
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
Y. Hotta
中科院分区：
文献类型：
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作者：
Katsuya Sato;Kimiyasu Sato;Y. Hotta
从流变行为和离心分离两方面研究了含聚乙烯醇（PVA）的ZnO湿喷磨和球磨浆料的流动性。湿喷磨的ZnO浆料的粘度是小得多相比，球磨的固体负载量和PVA含量无关。在30体积%的高固体负载量下，具有PVA的湿喷射研磨浆料的粘度降低至球磨浆料的九分之一。从蠕变恢复测量，球磨与PVA的浆料显示的弹性性能，而湿喷磨与PVA的一个显示的液体性质。因此，与PVA球磨的ZnO浆料相比，湿喷磨的ZnO浆料流动性更高，说明湿喷磨颗粒与PVA之间的吸附亲和力较弱。从离心分离试验中发现，由于吸附亲和力的差异，由湿喷射研磨颗粒制备的沉淀物的相对堆积密度高于由球磨颗粒制备的沉淀物。因此，ZnO颗粒和PVA之间的弱吸附亲和力的制造导致具有有机粘合剂如链状聚合物的高固体负载浆料的高流动性。
Fluidity of wet-jet milled and ball-milled ZnO slurries containing polyvinyl alcohol (PVA) was investigated from rheological behaviors and centrifugal separation. The viscosities of wet-jet milled ZnO slurries were much small as compared to ball-milled ones irrespective of the solids loading and PVA contents. At 30 vol % of high solids loading, the viscosity of wet-jet milled slurry with PVA was decreased to one-ninth of ball-milled one. From the creep-recovery measurements, the ball-milled slurry with PVA showed the elastic property, while the wet-jet milled one with PVA showed the liquid-like property. Therefore, the fluidity of wet-jet milled ZnO slurry with PVA was much higher than that of ball-milled one, indicating that the adsorption affinity between wet-jet milled particle and PVA was weak as compared to ball-milled one with PVA. From the centrifugal separation test, it was found that the relative packing densities of the precipitates prepared from wet-jet milled particles was high as compared to those prepared from ball milled ones due to the difference of adsorption affinity. Hence, the fabrication of weak adsorption affinity between ZnO particle and PVA leads to high fluidity of high solids loaded slurries with an organic binder like a chain polymer.