Centre for Advanced Composite Materials, Department of Mechanical Engineering, University of Auckland, New Zealand.
Centre for Advanced Composite Materials, Department of Mechanical Engineering, University of Auckland, New Zealand.
Sci Total Environ. 2022 Jan 20;805:150434. doi: 10.1016/j.scitotenv.2021.150434. Epub 2021 Sep 20.
Eco-friendly flame retardants are greatly required to meet the expectations of low-toxicity, environmental compatibility and sustainability. Extracellular polymeric substances (EPS), the biopolymers recovered from excess granular wastewater sludge, have been successfully incorporated into poly(vinyl alcohol) (PVA) by a solution casting method. Self-extinguishment of EPS was observed in a vertical burn test. Positive effects of EPS on the reduction of heat release rate and CO emission of EPS/PVA composites were also demonstrated. The presence of various types of phosphates was detected in the EPS and a possible flame-retardant mechanism has been proposed. The investigation of using granular sludge EPS to reduce the flammability of synthetic polymers may open the possibility of converting wastewater sludge into bio phosphorus-based flame retardants.
为了满足低毒性、环境相容性和可持续性的期望，人们非常需要环保型阻燃剂。细胞外聚合物（EPS）是从过量颗粒废水污泥中回收的生物聚合物，已经成功地通过溶液浇铸法掺入聚乙烯醇（PVA）中。在垂直燃烧测试中观察到 EPS 自熄灭。还证明了 EPS 对降低 EPS/PVA 复合材料的放热率和 CO 排放的积极影响。在 EPS 中检测到各种类型的磷酸盐，并且提出了一种可能的阻燃机理。使用颗粒污泥 EPS 降低合成聚合物可燃性的研究可能为将废水污泥转化为生物磷基阻燃剂开辟了可能性。
