The water contact angle test was performed to measure the hydrophilicity of both PLA and PLA-SF meshes. First, the meshes were adhered to the cover slide, which ensured that the meshes were flat. Second, 5 μL deionized water was dropped onto the meshes. Third, photos were captured by a digital microscope (U500X, Denmark). Finally, the contact angle was determined by using ImageJ software.
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