The invention discloses a preparation method for a support layer material with lasting
water retention for a hydrogel patch, and belongs to the technical field of preparation of hydrogel patches. The method comprises the following steps: washing, removing, unthreading and freezing pomelo peel to prepare pieces, and cooling,
grinding and adding mint leaves and
eucalyptus leaves into de-ionized water to prepare mixed
slurry; performing stirring and suction
filtration on the pomelo peel pieces and the mixed
slurry to prepare modified pomelo peel pieces, crushing the modified pomelo peel pieces into
powder, adding an
ethanol solution,
pectin,
sodium alginate and glycerin, and performing stirring mixing and rotary
evaporation concentration to obtain a concentrated solution; preparing a coiled thin film from the concentrated solution to obtain a substrate material, melting
polyethylene, uniformly
coating the surface of the substrate material with the molten
polyethylene, and performing cooling to
room temperature to obtain the support layer material with lasting
water retention. Examples show that the preparation method is convenient to operate; by a prepared support layer of the hydrogel patch, water loss can be effectively reduced, the adhesion property of the hydrogel patch can be improved, and the
transdermal absorption efficiency of active ingredients in the hydrogel patch can be improved; the preparation method has broad application prospect.