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首页> 外文期刊>Journal of Applied Polymer Science >Thin Film Composite Sodium Alginate Membranes for Dehydration of Acetic Acid and Isobutanol
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Thin Film Composite Sodium Alginate Membranes for Dehydration of Acetic Acid and Isobutanol

机译：薄膜复合海藻酸钠膜用于醋酸和异丁醇的脱水

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摘要

Dehydration of widely used organic solvents such as acetic acid (AA) and isobutanol (IB) is challenging tasks, which form close boiling mixtures with water. Sodium alginate (SA) thin film composite membranes were prepared and crosslinked with 2,4-toluene diisocyanate (TDI) and glutaraldehyde for dehydration of IB and AA/water mixtures through pervaporation (PV). The crosslinked and uncrosslinked SA composite membranes were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction, thermogravimetric analysis, scanning electron microscopy, and universal testing machine for intermolecular interactions, crystalline nature, thermal stability, surface morphology, and tensile strength, respectively. At a feed composition of 98 wt % IB and 95 wt % AA aqueous solutions, the TDI crosslinked SA composite membrane exhibited separation factors of 3229 and 708 with reasonable fluxes of 0.021 and 0.012 kg m~(-2) h~(-1), respectively. The results obtained in the study for IB and AA systems were compared with other SA membranes reported in the literature. The membranes appeared to have potential for commercial PV ability to dehydrate the solvents up to desirable purity levels (>99%) and feasibility of preparing them in a composite form which would enable scale-up into modular configurations.
机译：广泛使用的有机溶剂（例如乙酸（AA）和异丁醇（IB））的脱水是具有挑战性的任务，它们会与水形成紧密沸腾的混合物。制备藻酸钠（SA）薄膜复合膜，并与2,4-甲苯二异氰酸酯（TDI）和戊二醛交联，以通过渗透蒸发（PV）脱水IB和AA /水混合物。交联和未交联的SA复合膜通过傅里叶变换红外光谱（FTIR），X射线衍射，热重分析，扫描电子显微镜和分子间相互作用，晶体性质，热稳定性，表面形态和拉伸强度的通用测试机进行表征， 分别。在进料组成为98 wt％IB和95 wt％AA水溶液的情况下，TDI交联的SA复合膜表现出3229和708的分离系数，合理的通量为0.021和0.012 kg m〜（-2）h〜（-1） ， 分别。研究中获得的IB和AA系统结果与文献中报道的其他SA膜进行了比较。该膜似乎具有潜在的商业PV脱水能力，可将溶剂脱水至所需的纯度水平（> 99％），并具有以复合形式制备溶剂的可行性，从而可以放大成模块结构。

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