MBR中基于荷叶仿生膜污染控制策略的界面热力学机制研究

膜生物反应器（MBR）已成为国家水污染防治计划和生态文明建设等战略举措实施的关键技术之一，但是膜污染问题限制了其更大规模的应用，是MBR领域急需解决的关键科学问题。荷叶上表面的自清洁性能给了MBR中膜污染控制巨大启示。受此启发，申请人提出发展基于荷叶仿生膜污染控制策略的思路。然后迄今为止，荷叶上表面的独特结构与其自清洁性能之间的定量构效关系尚未揭示，无法人为可控地优化荷叶仿生膜污染控制策略。在即将结题的国家自然科学基金资助下，申请人发现膜表面结构与抗污染（自清洁）性能之间存在复杂的热力学关系，同时喷墨打印技术可数字化构建期望的膜表面结构。基于此，本项目拟发展适用于复杂表面结构的界面热力学方法，揭示仿生膜表面结构与自清洁性能之间的定量构效关系，进而通过喷墨打印制备和优化模仿荷叶表面结构的分离膜，并应用于MBR系统中。本项目将从新视角揭示膜污染机制，提供新的膜污染解决方案，具有重要的科学意义。

Membrane bioreactor (MBR) technology is one of key technologies supporting significant strategic moves such as national water pollution remediation plan and ecological civilization construction. However, membrane fouling problem largely hindered more widespread application of MBR, and remained the main problem needed to be solved imminently. The discovery of the self-cleaning nature of the lotus leaf surface provides great inspirations to membrane fouling research. Motivated by this phenomenon, this proposal provides new ideas regarding membrane fouling mitigation strategy by biomimetic fabrication of lotus-leaf-like membrane in MBRs. However, up to date, the quantitative structure-activity relationship between lotus leaf surface structure and its self-cleaning property has not been well revealed, and therefore, such a strategy cannot be optimized in a more controlled fashion. Supported by the nearly finished Natural Science Foundation of China, we find that, there existed complicated thermodynamic relationships between membrane surface structure/morphology and anti-fouling/self-cleaning performance, and inkjet-printing technique can digitally fabricate anticipated membrane surface structure. Based on these findings, this proposal aims to develop interfacial thermodynamic method for complicated surface structure, and to reveal the quantitative structure-activity relationship between membrane surface structure and self-cleaning property. Thereafter, inkjet-printing technique will be applied to fabricate and optimize lotus leaf biomimetic membranes for MBR systems. This proposal will offer a new perspective to reveal membrane fouling mechanisms, and provide new solution for membrane fouling problem, demonstrating the great scientific significance.