In reference, the mussel-encouraged surface adhesion chemistry, dopamine oxidative auto-polymerization on the surface of halloysite nanotubes (HNTs) was performed to confer hydrophilicity to the HNTs. The additional hydrophilic moieties with surface coating by polydopamine (PDA) was assured with transmission electron microscopy (TEM), thermogravimetric analysis (TGA), and X-ray photoelectron spectroscopy (XPS) techniques. A PDA/HNT-incorporated polyvinyl alcohol/polyvinyl amine (PVA-PVAm) membrane was fabricated for the pervaporation-dehydration of isopropanol/water (IPA/water), and the filler dispersion, crystallinity, and hydrophilicity of the membrane were confirmed by field-emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), and contact angle measurements, respectively. The pervaporation test was performed with membranes having different PDA/HNT contents, where the flux increased from 0.19 to 0.39 kg/m²h, and the separation factor decreased from 479 to 63 with the 80/20 (w/w, IPA/water) feed mixture at 40 °C. Compared to the unmodified HNT-incorporated membrane, the membrane with 5 wt.% PDA/HNT exhibited superior performance. Upon increasing the feed (85/15 IPA/water w/w) temperature from 40 to 70 °C, the flux of water and IPA increased from 0.062 to 0.13 kg/m²h and 0.000063 to 0.00144 kg/m²h, respectively. The apparent energy of activation calculated using the Arrhenius equation was positive for both IPA and water. The higher energy required for permeation of IPA (99.65 kJ/mol) compared to water (22.69 kJ/mol) is attributed to facile permeation of water compared to IPA through the hydrophilic channel created by PDA-HNT. In long-term operation (120 h), the IPA and water flux of the 5 wt.% PDA/HNT-incorporated PVA-PVAm membrane was maintained using a feed composition of 80/20 (w/w %) IPA/water at 40 °C, indicating remarkable reusability of the membrane.

作为参考，贻贝鼓励的表面粘附化学、多巴胺氧化自聚合在埃洛石纳米管 (HNT) 的表面上进行，以赋予 HNT 亲水性。使用透射电子显微镜 (TEM)、热重分析 (TGA) 和 X 射线光电子能谱 (XPS) 技术确保具有聚多巴胺 (PDA) 表面涂层的额外亲水部分。制备了掺入PDA/HNT的聚乙烯醇/聚乙烯胺（PVA-PVAm）膜，用于异丙醇/水（IPA/水）的渗透蒸发脱水，并通过现场确认膜的填料分散性、结晶度和亲水性-发射扫描电子显微镜 (FE-SEM)、X 射线衍射 (XRD) 和接触角测量，分别。²小时，在 40 °C 下，80/20（w/w，IPA/水）进料混合物的分离因子从 479 降至 63。与未改性的掺入 HNT 的膜相比，含有 5 wt.% PDA/HNT 的膜表现出优异的性能。将进料 (85/15 IPA/水 w/w) 温度从 40 °C 增加到 70 °C 后，水和 IPA 的通量从 0.062 增加到 0.13 kg/m ² h，从 0.000063 增加到 0.00144 kg/m ²h，分别。使用阿伦尼乌斯方程计算的表观活化能对于 IPA 和水都是正值。与水 (22.69 kJ/mol) 相比，IPA (99.65 kJ/mol) 渗透所需的能量更高，这归因于与 IPA 相比，水通过 PDA-HNT 产生的亲水通道更容易渗透。在长期运行（120 小时）中，使用 80/20 (w/w %) IPA/水的进料组合物维持 5 wt.% PDA/HNT 掺入 PVA-PVAm 膜的 IPA 和水通量40 °C，表明膜具有显着的可重复使用性。