Use of Oxalic-Acid-Modified Stellerite for Improving the Filter Capability of PM_2.5 of Paper Composed of Bamboo Residues

Figure 3

SEM images of different samples: (a) BR, (b) P5, (c) natural stellerite, (d) modified stellerite, (e) hand sheet composed of P5 without stellerite, and (f) hand sheet composed of P5 with modified stellerite (9%).

(a)

(b)

(c)

(d)

(e)

(f)