使用扫描电子显微镜（SEM）研究了 PLP-P 和 POP-P 的表面形态。聚合时间（tp）不同的 PLP-P 的皱纹形态呈随机分布。当 tp 从 40 分钟增加到 420 分钟时，PLP-P（POP-P）薄膜随 tp 的增加而形成，命名为 PLP-P-tp（POP-P-tp）。周期性皱纹的大小随 tp 的增大而增大；因此，通过改变 tp 可以很容易地控制皱纹的大小。在 PLP-P-40 薄膜上，表面皱纹并不明显（图 2b）。在 40 分钟 ≤ tp ≤ 120 分钟期间，形态由交织的条纹组成（图 2c，d）。随着 tp 时间进一步延长超过 120 分钟，皱纹几乎保持不变（图 2e）。在图 2f 中的 POP-P 薄膜上可以观察到微孔结构，这主要是由于糖模板的去除造成的。在上表面（图 2g）和内壁（图 2h）分别可以观察到分层结构的皱褶形态。从图 2i 中放大的 SEM 图像中，我们可以看到与 PLP-P 相同的周期性图案皱纹。

The surface morphologies of PLP-P and POP-P were studied using scanning electron microscopy (SEM). The wrinkled morphology of PLP-P, polymerized with different times (tp), is randomly distributed. When tp increased from 40 to 420 min, the PLP-P (POP-P) films formed with tp, named as PLP-P-tp (POP-P-tp). The size of periodic wrinkles increased with tp; thus, the size can be easily controlled by changing tp. The surface wrinkles were not apparent on the PLP-P-40 film (Figure 2b). At the period of 40 min ≤ tp ≤ 120 min, the morphology was composed of intertwined strips (Figure 2c,d). With further extension of tp by more than 120 min, the wrinkles remained almost unchanged (Figure 2e). Microporous structures, which mainly resulted from the removal of sugar template, are observed on the POP-P film in Figure 2f. The wrinkled morphology of hierarchical structure can be observed on the upper surface (Figure 2g) and the internal walls (Figure 2h), respectively. From the magnified SEM image in Figure 2i, we can see the same periodic patterned wrinkles as in PLP-P.