MXene掺杂的有机硅膜用于高效醇/水分离
MXene-doped organosilica membranes for efficient alcohol/water separation
对于醇/水共沸物的分离,渗透汽化由于不受气液平衡限制表现出显著的优势。单层MXene纳米片可以规则地堆叠以创建开放的狭窄纳米通道,使MXene成为制备高效分离膜的有前途的材料。通过物理共混将MXene二维纳米片掺入到 1,2-双(三乙氧基硅基)乙炔(BTESA)有机硅溶胶中,制备了BTESA/MXene混合基质膜。利用MXene二维纳米片的亲水性二维通道实现水分子的快速传输以达到提高BTESA膜渗透汽化分离性能的目的。当MXene的掺杂量为0.2%(质量分数)时,分离效果最佳。此时对水含量为5%的正丁醇/水体系在70℃下的通量和分离因子为1.00 kg/(m2·h)和716。
Pervaporation exhibits distinct advantages for separating such azeotropic mixtures as it is not constrained by vapor-liquid equilibrium.Well-aligned stacks of single-layer MXene nanosheets form open and confined nanochannels,which makes MXene a highly promising candidate for constructing high-efficiency separation membranes.In this study,MXene 2D nanosheets were incorporated via physical blending into a 1,2-bis(triethoxysilyl)acetylene (BTESA) organosilica sol,and BTESA/MXene mixed-matrix membranes were prepared.The hydrophilic 2D channels of MXene nanosheets facilitate rapid water transport,thereby enhancing the pervaporation separation performance of the BTESA membrane.The optimal separation efficiency was achieved at an MXene loading of 0.2%.Under these conditions,for a 5% water-in-n-butanol mixture at 70℃,the membrane exhibited a flux of 1.00 kg/(m2·h) and a separation factor of 716.
alcohol/water separation / pervaporation / MXene / organosilica
| [1] |
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| [2] |
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| [3] |
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| [4] |
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| [5] |
|
| [6] |
|
| [7] |
|
| [8] |
|
| [9] |
|
| [10] |
|
| [11] |
|
| [12] |
|
| [13] |
|
| [14] |
|
| [15] |
|
| [16] |
|
| [17] |
|
| [18] |
|
| [19] |
|
| [20] |
|
| [21] |
|
| [22] |
|
| [23] |
|
| [24] |
|
| [25] |
|
| [26] |
|
| [27] |
|
| [28] |
|
| [29] |
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中国石油化工股份有限公司科技部委托项目(223123)
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