Enhanced organophilic separations with mixed matrix membranes of polymers of intrinsic microporosity and graphene-like fillers
Enhanced organophilic separations with mixed matrix membranes of polymers of intrinsic microporosity and graphene-like fillers
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DOI：
10.1016/j.memsci.2016.12.061
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发表时间：
2017-03-15
影响因子：
9.5
通讯作者：
Gorgojo, Patricia
中科院分区：
文献类型：
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作者：
Alberto, Monica;Luque-Alled, Jose Miguel;Gorgojo, Patricia
以本征微孔聚合物PIM-1和氧化石墨烯（GO）衍生物为原料制备了亲有机混合基质膜（MMM），用于渗透汽化（PV）分离正丁醇和乙醇。氧化石墨烯（GO）已经通过改进的Hummers方法在溶液中合成，用烷基胺官能化，并进一步还原。已经评估了具有不同长度的链的两种烷基胺（分别为辛胺（OA）和十八胺（ODA）8和18个碳）的使用，并且官能化的GO材料已经用作MMM中的填料。膜已通过浇铸溶剂蒸发的PIM-1/GO衍生物溶液在室温下制备，和一系列的表征技术已被用来解释它们的结构，并将其与它们的分离性能。已经进行电子显微镜以确定膜的形态和官能化GO薄片在聚合物基质中的分散。此外，膜已通过傅里叶变换红外光谱（FT-IR），热重分析（TGA），和接触角进行了表征。从乙醇（EtOH）/水和丁醇（BtOH）/水组成的两种二元混合物中分离醇，所述二元混合物含有5重量%的醇，已经进行。在这些条件下，以相对低的浓度掺入石墨烯类填料显示出丁醇的平均分离因子从纯PIM-1膜的13.5增加到在某些情况下MMM的两倍以上;加入0.1wt%的还原胺官能化的GO ktowrizo对于短链（OA）和长链（ODA）烷基胺达到32.9和26.9，分别
Organophilic mixed matrix membranes (MMMs) have been fabricated with the polymer of intrinsic micro porosity PIM-1 and grapheneoxide (GO) derivatives for the recovery of 1-butanol and ethanol from aqueous solutions via pervaporation (PV). Graphene oxide (GO) has been synthesized in solution through a modified Hummers' method, functionalized with alkylamines, and further reduced. The use of two alkylamines with chains of different lengths, octylamine (OA) and octadecylamine (ODA) 8 and 18 carbons, respectively - has been evaluated and the functionalized GO materials have been used as fillers in MMMs. The membranes have been prepared by casting-solvent evaporation of PIM-1/GO derivative solutions at room temperature, and a range of characterization techniques have been used to interpret their structure and relate it to their separation performance. Electron microscopy has been carried out to determine the morphology of the membranes and the dispersion of the functionalized GO flakes in the polymer matrix. Moreover, the membranes have been characterized by Fourier transform infrared spectroscopy(FT-IR), thermogravimetric analysis (TGA), and contact angle. Separation of alcohol from two binary mixtures composed of ethanol (EtOH)/water and butanol (BtOH)/water, containing 5 wt% of alcohol, have been performed. Under these conditions, the incorporation of graphene-like fillers at relatively low concentrations shows an increase in average separation factor for butanol Ontowrizo) from 13.5 for pure PIM-1 membranes to, in some cases, more than double for the MMMs; with the addition of 0.1 wt% of reduced amine-functionalized GO ktowrizo reaches 32.9 and 26.9 for the short-chain (OA) and the long-chain (ODA) alkylamines, respectively.