基于QbD理念的微晶纤维素高速剪切湿法制粒过程实验研究

Quality by design based high shear wet granulation process development for the microcrystalline cellulose

本文应用质量源于设计（quality by design,Qb D）方法,建立高速剪切湿法制粒过程设计空间并验证。本研究以微晶纤维素（microcrystalline cellulose,MCC）-去离子水体系为载体,颗粒中值粒径和松装密度为关键质量属性,采用Plackeet-Burmann设计对干混时间、干混搅拌桨、切割刀转速、水用量、水加入时间、湿混时间、湿混搅拌桨、切割刀转速和干燥时间进行筛选,中心点复合设计对筛选出的关键工艺参数进行优化,并基于二次多项式回归模型开发过程设计空间。方差分析结果显示回归模型的P值均小于0.05,且失拟值均大于0.1,表明该模型可较好的描述关键质量属性和关键工艺参数之间的关系。设计空间以Overlay plot展示,加入95%置信区间后,可缩小设计空间范围并提高其可靠性,设计空间内的颗粒粒径可控制在250～355μm,颗粒松装密度可控制在0.4～0.6 g·cm^-3。结果显示,基于Qb D理念建立高速剪切湿法制粒过程设计空间,可以提高工艺过程的稳健性和灵活性。

The design space of the high shear wet granulation process was established and validated within the framework of quality by design （QbD）. The system of microcrystalline cellulose-de-ioned water was used in this study. The median granule size and bulk density of granules were identified as critical quality attributes. Plackeet-Burmann experimental design was used to screen these factors as follows： dry mixing time, the impeller and chopper speed of dry mixing, water amount, water addition time, wet massing time, the impeller and chopper speed of wet massing and drying time. And the optimization was implemented with the central composite experimental design based on screened critical process parameters. The design space of the high shear wet granulation process was established based on the quadratic polynomial regression model. Since the P-values of both models were less than 0.05 and values of lack of fit were more than 0.1, the relationship between critical quality attributes and critical process parameters could be well described by the two models. The reliability of design space, illustrated by overlay plot, was improved with the addition of 95% confidence interval. For those granules whose process parameters were in the design space, the granule size could be controlled within 250 to 355 μm, and the bulk density could be controlled within a range of 0.4 to 0.6 g ·cm^-3. The robustness and flexibility of the high shear wet granulation process have been enhanced via the establishment of the design space based on the QbD concept.