Method for preparing adhesive coating and adhesive film based on layer-by-layer assembly technology
A layer-by-layer assembly and bonding film technology, applied in the direction of film/sheet adhesives, adhesives, etc.
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Embodiment 1
[0037] Example 1: Preparation and Adhesive Application of Adhesive Coatings on Glass Surfaces.
[0038] The glass substrate was alternately immersed in PAH-D (1mg / mL, pH=7.4) and HA solution (1mg / mL, pH=7.4) for 15 minutes each, and this step was repeated to obtain an adhesive coating. After each step of immersion, the substrate is washed with water and dried with nitrogen. figure 1 The process of film thickness changing with the number of deposition cycles was tracked and monitored by surface profiler. It shows that the adhesion coating grows in a typical exponential growth form, that is, the thickness of the adhesion coating increases rapidly as the number of deposition cycles increases.
[0039] In this example, the concentrations of PAH-D and HA solutions are both 1 mg / mL, and the pH values are both physiological pH values, that is, 7.4. Changing the concentration of the solution will not have a significant impact on the construction of the membrane, but if the concent...
Embodiment 2
[0041] Example 2: Preparation and Adhesive Application of Adhesive Film
[0042] (PAH-D / HA)*30 membrane has very good guest molecule loading capacity. We firstly spin-coated 20 mg / mL cellulose acetate acetone solution on the glass surface at 3000 rpm to obtain ~1.5 micron cellulose acetate sacrificial layer on the glass surface. After cleaning in the plasma cleaning agent for 3 minutes, build a 30-period adhesive coating of PAH-D / HA on the surface of the cellulose acetate sacrificial layer (its concentration and pH value are as in Example 1), and soak it as a whole in 15mM pH = 7.4 ibuprofen solution for 3 hours; followed by immersing the whole in acetone for 3 minutes, so that the layer-by-layer assembled polyelectrolyte adhesive coating and the glass sheet were separated by the dissolution of cellulose acetate, thus obtaining a self-supporting Adhesive film. And transfer the self-supporting layer-by-layer assembly membrane to another container with acetone for rinsing for ...
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