What are the reasons that affect the water retention of hydroxypropyl methyl cellulose?

1、 The water retention of hydroxypropyl methylcellulose is affected by viscosity

When the viscosity of hydroxypropyl methylcellulose increases, its water retention rate also increases. When the viscosity reaches a certain level, the increase in water retention rate tends to be gradual.

2、 The water retention of hydroxypropyl methylcellulose is affected by the amount of addition

Generally speaking, the larger the amount added, the higher the water retention rate, and the better the water retention effect. Within the range of 0.25-0.6% addition, the water retention rate increases faster with the increase of addition amount. When the addition amount is further increased, the trend of adding water retention rate slows down.

3、 The water retention of HPMC will be affected by the temperature of hot gel

Generally, the higher the temperature of thermal gel, the higher the water retention rate. On the contrary, the thermal gel temperature, the water retention rate is low.

4、 The water retention of hydroxypropyl methylcellulose is affected by uniformity

Hydroxypropyl methyl cellulose with uniform reaction, methoxy and hydroxypropyl groups evenly distributed, and high water retention rate.