Hydrogel-Crosslinked Microneedles Based on Microwave-Assisted Drying Method

Figure 8

Swelling graphs of hydrogel-crosslinked microneedles without microwave assistance (a) and with microwave assistance (b) under the same drying time. The maximum swelling histogram at different drying times (c) for the hydrogel-crosslinked microneedles dried using a conventional oven. The maximum swelling histogram of the hydrogel-crosslinked microneedles dried using microwave-assisted drying at different drying times (d). The error line represents the standard deviation of the swelling effect of repeated determination of 10 groups of independent samples (). The histogram shows the average value.

(a)

(b)

(c)

(d)