(90g) Effect of Particle-Scale Properties on Moisture Sorption Behavior of Agrochemical Solids

Understanding the effect of moisture on agrochemical solids is crucial for effective handling and storage. Moisture sorption isotherms obtained via gravimetric methods are important characterization to evaluate the nature of solids-moisture interaction. This work utilizes a dynamic vapor sorption unit to run gravimetric methods. Various particle properties can play a role in determining the moisture sorption behavior. This work covers the role of particle size, composition, and crystal form on isotherm shapes and hysteresis. It is found that for crystalline material, crystal form and chemical composition play a dominating role in determining the isotherm shapes compared to particle size and shape. However, particle size and shape impact the moisture sorption kinetics. In addition to particle properties, the effect of operating temperature on moisture sorption kinetics was studied. Furthermore, moisture sorption models were evaluated using the experimental data.