Xing Lijuan, Li Zhigang, Zhang Qingsong, Zhang Yixuan, Liu Pengfei, Zhang Kailin
State Key Laboratory of Separation Membranes and Membrane Processes, State Key Laboratory of Hollow Fiber Membrane Materials and Processes, School of Materials Science and Engineering, Tianjin Polytechnic University Tianjin 300387 China
School of Computer Science & Software Engineering, Tianjin Polytechnic University Tianjin 300387 China.
RSC Adv. 2018 Jan 10;8(5):2622-2631. doi: 10.1039/c7ra10904k. eCollection 2018 Jan 9.
With a fantastic combination of yeast fermentation and hydrogel membrane formation, a series of microorganism inspired porous hydrogel membranes (MIHM) with various mass ratios of yeast/sodium alginate (SA) were developed. The yeast cells were firstly activated by addition of glucose for generating byproduct carbon dioxide (CO), inducing the formation of porous structures. The ionic cross-linking between calcium chloride and SA was subsequently performed based on an egg-box model. It is of interest to note that the obtained MIHM hydrogel membranes exhibited decreased transparency and hierarchical porous structure with pore sizes varying from 2 nm to 1 mm, giving rise to significantly increased contact angle (CA) values from 63.65° to 107.83° and obviously decreased equilibrium swelling ratios from 79.72 to 18.05. Especially, the adsorption kinetics of crystal violet (CV) show that the MIHM hydrogel membrane exhibited an encouraging uptake capacity of 18.40 mg g at 10 mg g and the adsorption kinetics of CV could be well defined by a pseudo-first-order kinetic equation. Owing to great advantages in facile fabrication, high efficiency, low cost and desirable biocompatibility, the MIHM hydrogel membrane can be large-scale fabricated and used for industry and agriculture.
通过酵母发酵和水凝胶膜形成的奇妙结合，开发了一系列具有不同酵母/海藻酸钠（SA）质量比的受微生物启发的多孔水凝胶膜（MIHM）。首先通过添加葡萄糖激活酵母细胞以产生副产物二氧化碳（CO），诱导多孔结构的形成。随后基于蛋盒模型进行氯化钙与SA之间的离子交联。值得注意的是，所获得的MIHM水凝胶膜表现出透明度降低和分级多孔结构，孔径从2nm到1mm不等，导致接触角（CA）值从63.65°显著增加到107.83°，平衡溶胀率从79.72明显降低到18.05。特别是，结晶紫（CV）的吸附动力学表明，MIHM水凝胶膜在10mg/g时表现出令人鼓舞的18.40mg/g的吸附容量，并且CV的吸附动力学可以通过伪一级动力学方程很好地定义。由于在简便制造、高效率、低成本和理想的生物相容性方面具有巨大优势，MIHM水凝胶膜可以大规模制造并用于工农业。
