Abstract Controlling the particle-matrix interface of filled systems is generally an essential challenge for reaching target characteristics. Herein, a simple method is described to characterize and optimize the filler surface chemistry in the case of zirconia feedstocks using stearic acid as a surfactant. Our technique involves contact angle measurements by the sessile drop method between water and thermally treated zirconia powders mixed with stearic acid. It is shown that this is a powerful way to determine the optimum additive concentration and processing parameters. In addition, the effect of coated particles on the dynamic rheological behavior of the molten feedstock is investigated. Furthermore, the kinetics of the hydrophobization of the powder surface induced by esterification between the fatty acid and the adsorbed hydroxyls at the powder surface has been accurately followed.

中文翻译：

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氧化锆基原料：颗粒表面改性对流变特性的影响

摘要 控制填充系统的粒子-矩阵界面通常是达到目标特征的基本挑战。在此，描述了一种简单的方法来表征和优化在氧化锆原料使用硬脂酸作为表面活性剂的情况下的填料表面化学。我们的技术涉及通过水和热处理氧化锆粉末与硬脂酸混合的静滴法测量接触角。结果表明，这是确定最佳添加剂浓度和加工参数的有效方法。此外，还研究了包覆颗粒对熔融原料的动态流变行为的影响。此外，