Journal
SEPARATION SCIENCE AND TECHNOLOGY
Volume 51, Issue 18, Pages 2940-2947Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/01496395.2016.1239638
Keywords
Flat membrane; morphology; performance; poly(L-lactic acid); solvent mixture
Funding
- Ministry of Science and Technology of China [2016YFC0400406]
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Poly (L-lactic acid) (PLLA) membranes were fabricated through immersion precipitation method. 1, 4-dioxane (DX), N-methyl-2-pyrrolidone (NMP), N, N-dimethylformamide (DMF), N, N-dimethyl-acetamide (DMAc), and DX/NMP, DX/DMF and DX/DMAc were used as solvents severally. With a focus on the PLLA/DX/NMP/H2O system, the effect of solvent mixture on PLLA membrane was investigated by altering the ratio of DX/NMP. Various membrane morphologies were obtained, which were further correlated by mean of solubility parameter and viscosity of casting solution. It was found that the membrane cast with DX/NMP (1/1) exhibited ideal structure and better performance compared with membranes cast with same concentration of PLLA.
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