Exploring the Benefits and Applications of Hydroxypropyl Methylcellulose in Modern Industries
In another study, Jenni et al. stained MHEC with a fluorescent dye and visualized and quantified the migration of MHEC through the capillaries of mortars. They found that MHEC accumulates at system interfaces exhibiting a reduced porosity. From this, they conclude that the cellulose ethers can migrate through the pore system and are therefore not or only partly adsorbed on cement particles under wet conditions [18]. In a later publication from this group they state that the dissolved CE is transported downwards through the capillary pores, but accumulates at the contact layer and substrate surface, which act as micro-filters [19].
In addition to improving workability, MHEC also enhances the water retention properties of cement. Water retention is crucial in cement applications as it ensures that the mixture remains hydrated for an extended period of time. This is particularly important in hot and dry climates where evaporation can occur rapidly. By adding MHEC to cement, the water is effectively trapped within the mixture, preventing it from evaporating too quickly. This allows for better hydration of the cement, resulting in improved strength and durability of the final product.
MHEC with high viscosity.