聚乙烯糖醇水凝涂层用于保护电活性细菌免受化学冲击
Niloufar Fattahi1, Jeffrey Reed1, Evan Heronemus2
1Tim Taylor Department of Chemical Engineering, Kansas State University, Manhattan, KS 66506, USA.
Bioelectrochemistry (Amsterdam, Netherlands)
|November 17, 2023
概括
聚乙烯甘醇 (PEG) 水凝保护微生物电化学细胞 (MxCs) 中的电活性生物膜. 这些涂层提高了生物膜的稳定性和电流密度,即使在具有挑战性的低资源和富含氨的环境中也是如此.
科学领域:
- 生物电化学 生物电化学
- 材料科学 材料科学 材料科学
- 环境工程 环境工程
背景情况:
- 微生物电化学细胞 (MxCs) 由于在恶劣条件下生物电化学活性丧失而面临限制.
- 保护电活性生物膜对于MxC的性能和稳定性至关重要.
研究的目的:
- 调查使用聚乙烯糖醇 (PEG) 水凝作为MxCs中阳极生物膜的保护涂层.
- 为了评估PEG水凝对生物膜活力和性能在寡质条件下和氨-N冲击的影响.
主要方法:
- 通过聚合PEG二维нил硫和PEG四甲前体,合成了PEG水凝.
- 在MxC阳极室中,同时监测了凝涂层和未涂层的电极.
- 评估了生物膜活力,电流密度和对氨-N冲击的反应.
主要成果:
- PEG水凝涂层在广泛的pH范围 (3-10) 中表现出长期的水解稳定性.
- 与未涂层阳极 (0.12 A/m2) 相比,涂层阳极在寡质条件下表现出明显更高的电流密度 (0.44 A/m2).
- PEG水凝作为氨-N的扩散屏障,改善生物膜弹性和冲击时的恢复.
结论:
- 基于PEG的水凝涂层有效地稳定了MxC中的电活性生物膜.
- 这些涂料提高了MxC在充满挑战的环境中的性能,扩大了它们的操作范围.
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