传统交联聚苯乙烯合成时,由于涉及含卤素的交联剂(如四氯化碳)进行Friedel-Crafts交联反应,与聚苯乙烯反应过程中不可避免地会释放出氯化氢气体,对环境和工业设施造成危害。鉴于此,使用非卤素型交联剂(二甲氧基甲烷、二乙氧基甲烷和二乙氧基乙烷)与废旧泡沫反应制得三种非卤素型交联聚苯乙烯材料(HCP),并将其应用于废水中酚类物质的脱除。研究发现,HCP利用其多孔结构、Lewis碱性和疏水性,与酚类物质形成π-π堆积、氢键、疏水作用等相互作用,对苯酚、对氯苯酚、2,4-二甲基苯酚等七种酚类物质均有良好的吸附性能,吸附量最高可达230.910mg/g,吸附速率在0.01～0.1min-1。由此可见,HCP是一种绿色且具有实用前景的新型吸附材料。
The conventional synthesis of cross-linked polystyrene poses a threat to the environment and industrial facilities because it involves the use of halogenated cross-linking agents (such as carbon tetrachloride) for the Friedel-Crafts reaction with polystyrene,which inevitably releases hydrogen chloride gas during the reaction process.In view of this,non-halogenated cross-linking agents (dimethoxymethane,diethoxymethane and diethoxymethane) were used in the reaction with waste foams to produce three types of non-halogenated cross-linked polystyrene materials (HCP),which were used for the removal of phenols from wastewater.It was found that the HCP used their porous structure,Lewis basicity and hydrophobicity to form interactions with phenolics,such as π-π stacking,hydrogen bonding and hydrophobic interactions,which resulted in the good adsorption performance of the HCP for seven phenolics,including phenol,p-chlorophenol and 2,4-dimethylphenol.The maximum adsorption amount could reach up to 230.910mg·g-1,and the adsorption rate was in the range of 0.01～0.1min-1.It can be seen that HCP is a green and promising new adsorbent material.
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基金资助
国家自然科学基金(52405360,22008183)
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