2. Methods
2.1. Materials
Poly (L-lactic acid) (PLLA, PL 65) was obtained from PURAC Biomaterials.
Tetrahydrofuran (99.5%) was bought from Beijing Bailingwei Science and
Technology CO. LTD. Acetone (99.5%) was supplied by Modern Oriental
(Beijing) Technology Development CO. LTD. SylgardTM184 silicone elastomer kit (PDMS) was purchased from Dow. MWCNTs were
acquired from Shenzhen Suiheng Science and Technology CO. LTD. Dimethyl
formamide (DMF, 99.80%) was bought from Fisher Scientific Ltd.
Dichloromethane (DCM, 99.99%) was purchased from Sigma-Aldrich. Human
Skin Fibroblasts (HSF) cells and HSF specialized culture medium were
obtained from Shanghai Saibekang Biotechnology. Phosphate buffer saline
(PBS) was bought from Procell. Pancreatic enzyme was supplied by
Biosharp. Cell Counting Kit-8 (CCK8) were purchased from Invigentech.
All chemicals were of analytical grade without any further purification.