Tu Jia-Ling, Lai You-Ren, Lin Chia-Yu, Wang Steven S-S, Lin Ta-Hsien
Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan.
Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan.
Int J Biol Macromol. 2024 Dec;283(Pt 4):137680. doi: 10.1016/j.ijbiomac.2024.137680. Epub 2024 Nov 18.
Environmental contamination from oil spills and industrial wastewater poses long-term risks to ecosystems and human health. Amyloid fibrils' superior stiffness and stability, outstanding biocompatibility and biodegradability, versatile functional groups, and high specific surface area make them promising sustainable adsorbents. This study is aimed at examining the application of three-dimensional polysaccharide-modified whey protein amyloid fibril (WPIAF) aerogels in oil/water separation and emulsion separation. The WPIAF aerogel was first synthesized through the salting out method coupled with lyophilization, then modified using carboxymethyl cellulose (CMC) or chitosan (CS). Our results showed that WPIAF aerogels exhibited increased mechanical properties and surface hydrophobicity after polysaccharide modification. The CS-modified WPIAF aerogels showed better oil adsorption capacities, oil adsorption capability, and reusability than WPIAF aerogel and CMC-modified WPIAF aerogels. Furthermore, the applicability of polysaccharide-modified WPIAF aerogels in a continuous oil/water separation system was demonstrated. Finally, the separation efficiencies of polysaccharide-modified WPIAF aerogels were determined to be over 90 % in various emulsion systems, and the possible separation mechanism was further investigated. This study provides a nice example of applying amyloid-based aerogels for oil/water separation and emulsion separation.
石油泄漏和工业废水造成的环境污染对生态系统和人类健康构成长期风险。淀粉样纤维具有卓越的刚度和稳定性、出色的生物相容性和生物降解性、多样的官能团以及高比表面积，使其成为很有前景的可持续吸附剂。本研究旨在考察三维多糖改性乳清蛋白淀粉样纤维（WPIAF）气凝胶在油/水分离和乳液分离中的应用。首先通过盐析法结合冻干合成WPIAF气凝胶，然后用羧甲基纤维素（CMC）或壳聚糖（CS）进行改性。我们的结果表明，多糖改性后WPIAF气凝胶的机械性能和表面疏水性有所提高。CS改性的WPIAF气凝胶比WPIAF气凝胶和CMC改性的WPIAF气凝胶表现出更好的吸油能力、吸油容量和可重复使用性。此外，还证明了多糖改性WPIAF气凝胶在连续油/水分离系统中的适用性。最后，确定多糖改性WPIAF气凝胶在各种乳液体系中的分离效率超过90%，并进一步研究了可能的分离机制。本研究为应用基于淀粉样蛋白的气凝胶进行油/水分离和乳液分离提供了一个很好的例子。
