乳酸透过基于低共熔溶剂的聚合物包合膜的渗透

Matsumoto Michiaki, Takemori Sae, Tahara Yoshiro

Department of Chemical Engineering and Materials Science, Doshisha University, Kyoto 6100321, Japan.

Membranes (Basel). 2020 Sep 19;10(9):244. doi: 10.3390/membranes10090244.

Lactic acid that is prepared by fermentation is a compound in food, cosmetic pharmaceutical, and chemical industries. Since a simple technique is desired that separates lactic acid from the cultures, we propose lactic acid permeation through a poly(vinyl chloride)(PVC)-based membrane that contains deep eutectic solvents (DESs) as a carrier. Lactic acid was successfully permeated through polymer inclusion membranes (PIMs) containing hydrophilic DESs, urea-choline chloride and glucose-choline chloride. The permeation behavior was explained by the facilitated transport mechanism based on the solution-diffusion model. Simple preparation of thinner membranes in the PIM process and higher permeation rates are advantages over the supported liquid membrane process. The PVC-based membrane process containing environmentally benign hydrophilic DESs is promising for lactic acid separation on an industrial scale.

通过发酵制备的乳酸是食品、化妆品、制药和化工行业中的一种化合物。由于需要一种简单的技术来从培养物中分离乳酸，我们提出了乳酸通过含有深共熔溶剂（DESs）作为载体的聚氯乙烯（PVC）基膜进行渗透的方法。乳酸成功地透过了含有亲水性DESs、尿素-氯化胆碱和葡萄糖-氯化胆碱的聚合物包容膜（PIMs）。基于溶液扩散模型的促进传输机制解释了渗透行为。PIM工艺中更薄的膜制备简单且渗透率更高，这是相对于支撑液膜工艺的优势。含有环境友好型亲水性DESs的PVC基膜工艺在工业规模上分离乳酸方面具有广阔前景。