Kulkarni Akshay S, Sajjan Ashok M, Khan T M Yunus, Badruddin Irfan Anjum, Kamangar Sarfaraz, Banapurmath Nagaraj R, Ayachit Narasimha H, Ashwini M, Sharanappa A
Department of Chemistry, KLE Technological University, Hubballi 580031, India.
Center for Material Science, KLE Technological University, Hubballi 580031, India.
Polymers (Basel). 2021 Aug 26;13(17):2868. doi: 10.3390/polym13172868.
Natural polymers have attracted a lot of interest in researchers of late as they are environmentally friendly, biocompatible, and possess excellent characters. Membranes forming natural polymers have provided a whole new dimension to the separation technology. In this work, chitosan-gelatin blend membranes were fabricated using chitosan as the base and varying the amount of gelatin. Transport, mechanical, and surface characteristics of the fabricated membranes were examined in detail by means of the characterizing techniques such as Fourier transform infrared spectroscopy, differential scanning colorimetry, wide angle X-ray diffraction, scanning electron microscope, and thermogravimetric analysis. In order to analyze the water affinity of the developed blend chitosan-gelatin membranes, the percentage degree of swelling was examined. Out of the fabricated membranes, the membrane loaded with 15 mass% of gelatin exhibited the better pervaporation performance with a pervaporation separation index value of 266 at 30 °C for the solution containing 10% in terms of the mass of water, which is the highest among the contemporary membranes. All the fabricated membranes were stable during the pervaporation experiments, and permeation flux of water for the fabricated membranes was dominant in the overall total permeation flux, signifying that the developed membranes could be chosen for efficient separation of water-isopropanol mixture on a larger scale.
近年来，天然聚合物因其环境友好、生物相容性好且具有优异特性而引起了研究人员的广泛关注。由天然聚合物形成的膜为分离技术带来了全新的维度。在这项工作中，以壳聚糖为基础，改变明胶的用量，制备了壳聚糖-明胶共混膜。通过傅里叶变换红外光谱、差示扫描量热法、广角X射线衍射、扫描电子显微镜和热重分析等表征技术，详细研究了所制备膜的传输、机械和表面特性。为了分析所制备的壳聚糖-明胶共混膜的亲水性，检测了溶胀度百分比。在所制备的膜中，负载15质量%明胶的膜在30℃下对含10%（质量）水的溶液表现出更好的渗透汽化性能，渗透汽化分离指数值为266，这是当代膜中最高的。在渗透汽化实验过程中，所有制备的膜都很稳定，并且所制备膜的水渗透通量在总渗透通量中占主导地位，这表明所开发的膜可被选择用于大规模高效分离水-异丙醇混合物。
