三维多孔弹性体吸附剂的制备及其高效去除染料特性

Synthesis of Three-Dimensional Porous Elastomer Adsorbent and Its Properties of Highly Efficient Dyes Removal

通过使用乙烯-醋酸乙烯酯共聚物将多孔炭黏附在聚氨酯泡沫骨架中,构建了一种新型三维多孔弹性体吸附剂(3D-PE)。利用扫描电子显微镜(SEM)、气体吸附分析仪、电子万能试验机、紫外-可见分光光度计等对3D-PE的结构、性质及染料吸附性能进行了表征。结果表明:3D-PE在压缩条件下表现出高强度、优异的回弹性和良好的柔韧性,对有机染料分子具有较高的吸附速率(5 min内去除率为96%)和稳定的循环使用性。

Developing an efficient adsorbent is of great importance for wastewater treatment.Despite many examples for their synthesis exist,it still remains a challenge to fabricate a versatile adsorbent to overcome the defects of their common forms(e.g.,powder,pellet,bead and flake).Herein,a novel three-dimensional porous elastic adsorbent(3D-PE)was constructed by adhering porous carbon to polyurethane foam framework using ethylene-vinyl acetate copolymer.3D-PE was characterized by scanning electron microscope(SEM),gas adsorption analyzer,electronic universal testing machine and UV-Vis spectrophotometer.Benefitting from the rational integration of the porous carbon,ethylene-vinyl acetate copolymer and polyurethane foam,3D-PE exhibited high strength,excellent resilience and remarkable flexibility even under compression conditions.Inspired by these impressive characteristics,3D-PE was potentially used as an adsorbent for wastewater purification,especially in a feasible application to be operated under harsh conditions.As a proof of concept,when the adsorbents were used towards methylene blue removal,3D-PE exhibited high adsorption rate(96%removal efficiency within 5 min),stable recyclability even under a repeatedly compressed condition.In addition,kinetics and isotherm models were fitted.It was confirmed that the adsorption of methylene blue by 3D-PE was chemisorption and multi-molecular layer adsorption.3D-PE may hold good promising applications in wastewater remediation,catalytic reactions,and environmental engineering.