Dear friend cellulose is not dissolvable in water, Rather water is used only as a carrier for cellulose and the formation of an emulsion, and the purpose of this work is to dilute it and make needed concentration.
Cellulose is not soluble in water. Even it can't be dissolved in many solvents. You need to use either combination of solvents (if water is necessary to use), high temperature, and rigorous agitation. Organic solvents such as DMSO etc can be a good option for cellulose dissolution.