Hydrogel-Crosslinked Microneedles Based on Microwave-Assisted Drying Method

Figure 9

(a)–(d) show the deformation of the hydrogel-crosslinked microneedles obtained by microwave-assisted drying under the pressure of 0 N (a), 15 N (b), 30 N (c), and 40 N (d). Curve (e) between the pressure experienced by the hydrogel microneedles and the depth of the downward extrusion under different conditions, including no crosslinking agent, crosslinking agent, crosslinking agent, and microwave.

(a)

(b)

(c)

(d)

(e)