污泥EPS作为阻燃剂的机制归纳与潜力分析  

Mechanisms Summary and Potential Analysis of EPS as a Flame Retardant

作　　者：郝晓地[1] 赵梓丞 李季[1] 时琛 吴远远 HAO Xiao-di;ZHAO Zi-cheng;LI Ji;SHI Chen;WU Yuan-yuan(Sino-Dutch R&D Centre for Future Wastewater Treatment Technologies,Key Laboratory of Urban Stormwater System and Water Environment,Ministry of Education,Beijing University of Civil Engineering and Architecture,Beijing 100044,China)

机构地区：[1]北京建筑大学城市雨水系统与水环境省部共建教育部重点实验室,中-荷未来污水处理技术研发中心,北京100044

出　　处：《环境科学》2021年第6期2583-2594,共12页Environmental Science

基　　金：国家自然科学基金项目(51878022)。

摘　　要：高附加经济价值回收产物胞外聚合物(EPS)提取可以有效推动剩余污泥资源化目标.EPS除可替代传统藻酸盐应用于食品、医药、纺织、印染、造纸和日化等行业外,它在阻燃方面独特的性能已展现出用作高端航空器防火涂层的诱人潜力.这得益于EPS本身复杂的化学结构与物质成分,其优异的相容性、黏附性和生物合成性等优势使它的阻燃与环保性能可能优于市场目前已应用上各种阻燃剂.因此,系统分析和总结EPS的阻燃特性机制对其广泛应用极具现实意义.首先,在总结市售现有各类阻燃剂之优缺点基础上,对比分析EPS阻燃特性以及应用潜力.其次,在阐述EPS中磷(P)元素与类藻酸盐(ALE)物质阻燃原理的情况下,厘清EPS胞外蛋白的协同阻燃过程,以揭示EPS阻燃性能的可能机制.以此为基础上,随之综合评价EPS阻燃特性,并与其他阻燃剂横向对比,总结EPS作为阻燃剂的优势所在.最后,为进一步提高EPS用作表面涂层阻燃材料性能,提出增加EPS磷元素含量、提高和纯化EPS中ALE以及优化EPS与基质的修饰策略.High value-added extracellular polymer substance(EPS)extracted from excess sludge can effectively promote resource recovery from wastewater.EPS can replace traditional alginate in the food,medicine,textile,printing and dyeing,papermaking,and household chemicals industries.Moreover,its unique performance as a flame retardant has shown attractive potential for aircraft including space shuttles.This is due to the complicated chemical structure and composition of EPS,the excellent compatibility,adhesion,and other advantages of which could yield environmental-friendly flame-retardants.Therefore,a systematic analysis and summary on the mechanisms of EPS as flame retardants is of significance for future application.On the basis of the advantages and disadvantages of other fire-resistant materials on the market,the characteristics and application potential of EPS are analyzed and summarized.Second,the possible fire-resistant mechanisms of phosphorus and alginate-like substance(ALE)in EPS are revealed,and the synergistic flame-retardant effects of extracellular-proteins are also elucidated.Based on this,the flame-retardant characteristics of EPS are comprehensively evaluated and compared with other fire-resistant materials.To further improving the performance of EPS as a flame-retardant material,some modification strategies are proposed,such as increasing their phosphorus content,purifying and enhancing the content of ALE in EPS,and optimizing the modification methods of EPS on their substrates.

关 键 词：胞外聚合物(EPS) 防火材料 阻燃特性 磷(P) 类藻酸盐(ALE) 胞外蛋白 

分 类 号：X705[环境科学与工程—环境工程]