Study on the Rheological Properties of Organic Raw Materials for Seedling Pot

When the biodegradable seedling pot was prepared in the process of negative pressure adsorption, the rheological properties of materials had a great influence on the preparation of seedling pot. In this study, solution blended with NaOH and biogas slurry was used to pretreat the corn stalks, and then organic materials were prepared by beating. The viscosities of organic materials under different conditions were measured by digital rotary viscometer and the pretreatment time, TS, temperature, Alkali concentration and rotational speed on the rheological properties of organic materials were discussed. The results showed that the organic material had a rheological index of n < 1, which belonged to the pseudoplastic fluid; the apparent viscosity of the organic materials first decreased and then increased with the increase of the pretreatment time, and it increased in approximate S curve with the increase of TS, and decreased in approximate linear with the increase of temperature, and decreased linearly with the increase of alkali concentration. The viscosity decreased with the increase of rotation speed, and the higher the rotation speed, the slower the apparent viscosity decreased. The results of this study will provide the theoretical basis for the preparation of organic raw materials, pot molding and drying.