Synergistic Effect of Nanosilica Aerogel with Phosphorus Flame Retardants on Improving Flame Retardancy and Leaching Resistance of Wood

Figure 2

SEM images of the surface of transverse section of (a) S0, (b) S1, and (c) S4 and the tangential section of (d) S0, (e) S3, and (f) S6, respectively.

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(d)

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