Towards improved membrane production: using low-toxicity solvents for the preparation of PEEK nanofiltration membranes
Towards improved membrane production: using low-toxicity solvents for the preparation of PEEK nanofiltration membranes
复制标题
DOI：
10.1039/c5gc02546j
复制
发表时间：
2016-01-01
期刊：
影响因子：
9.8
通讯作者：
Livingston, Andrew
中科院分区：
文献类型：
--
作者：
Burgal, Joao da Silva;Peeva, Ludmila;Livingston, Andrew
在这项工作中，从生产的角度来看，与商业聚酰亚胺（PI）基有机溶剂纳滤（OSN）膜相比，PEEK膜是“绿色”的。绿色指标（e因子和溶剂强度）和废物成本被用于评估PEEK膜的环境负担：PEEK膜的溶剂强度为8.3，而PI基膜为35-224；PEEK膜的废物成本为46磅千克（-1）聚合物，而PI基膜为1019磅千克（-1）聚合物（实验规模）和189磅千克（-1）聚合物（工业规模）。成功地将PEEK膜放大成螺旋缠绕模块，THF的渗透率在0.26 L h(-1) m(-2) bar（-1）和0.47 L h(-1) m(-2) bar（-1）之间，分子量截止值（MWCO）接近300 g mol（-1）。作为最后的评估，还评估了使用PEEK膜渗透100 L h(-1) THF流量时的溶剂强度和环境负担。结果表明，该膜的浪费成本为1.4磅m(-2)，显著低于PI基膜。
In this work it is shown that PEEK membranes are "green" from the production point of view when compared with commercial polyimide (PI) based organic solvent nanofiltration (OSN) membranes. Green metrics (E-factor and solvent intensity) and waste cost were used in order to assess the environmental burden of PEEK membranes: the solvent intensity of PEEK membranes is 8.3 vs. 35-224 for PI based membranes, and the waste cost for PEEK membranes is 46 pound kg(-1) of polymer vs. 1019 pound kg(-1) of polymer (bench scale) and 189 pound kg(-1) of polymer (industrial scale) for PI based membranes. Scaling-up of PEEK membranes to spiral-wound modules was successfully achieved with permeances between 0.26 L h(-1) m(-2) bar(-1) and 0.47 L h(-1) m(-2) bar(-1) for THF, and molecular weight cut-offs (MWCO) of similar to 300 g mol(-1). As a final assessment, the solvent intensity and environmental burden associated with permeating a THF flow of 100 L h(-1) using PEEK membranes was also assessed. The results showed a waste cost of 1.4 pound m(-2) of membrane, significantly lower than PI based membranes.