新型层次孔聚合物的结构调控及吸附行为  

Structure control and adsorption behavior of novel hierarchical porous polymer

作　　者：蔡力锋 詹杰茗 梁杰 杨磊 郑冰娜 CAI Lifeng;ZHAN Jieming;LIANG Jie;YANG Lei;ZHENG Bingna(Fujian Provincial Key Laboratory of Ecology-Toxicological Effects&Control for Emerging Contaminants/College of Environmental and Biological Engineering,Putian University,Putian 351100,China;Key Laboratory for Polymeric Composite&Functional Materials of Ministry of Education/School of Chemistry,Sun Yat-sen University,Guangzhou 510006,China)

机构地区：[1]福建省新型污染物生态毒理效应与控制重点实验室/莆田学院环境与生物工程学院,福建莆田351100 [2]聚合物复合材料及功能材料教育部重点实验室/中山大学化学学院,广东广州510006

出　　处：《中山大学学报（自然科学版）（中英文）》2023年第1期161-168,共8页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金青年基金(51703254);福建省自然科学基金(2019J01808,2021J011107);福建省新型污染物生态毒理效应与控制重点实验室开放课题(PY17007)。

摘　　要：在成功制备新型层次孔聚合物(nHPP)的基础上,表征了nHPP的微纳结构,详细研究了傅克超交联条件对其孔隙结构的影响,并进一步考察了nHPP对水中有机小分子染料的吸附性能。实验结果表明,nHPP呈现由中空聚合物纳米球相互堆叠构成的三维纳米网络结构,其中空聚合物纳米球粒径约为154 nm,壳层聚合物厚度约为7 nm;聚合物骨架含大量微孔结构,聚合物纳米球相互堆砌及其中空腔体共同形成了中/大孔结构,从而显现出典型的层次孔结构。nHPP的BET(Brunauer-Emmett-Teller)比表面积、微孔比表面积、总孔容和微孔孔容等孔结构参数可通过超交联反应温度和催化剂添加量进行调控。nHPP丰富的层次化孔隙结构赋予其稳定、高效、环保的良好性能,表现为对水中刚果红(CR,Congo red)良好的吸附效果,且吸附过程初期主要由CR在吸附剂外部液膜中的扩散控制,后期主要由CR在吸附剂内部层次孔道中的扩散控制。Based on the successful synthesis of novel hierarchical porous polymer(nHPP),the micro-,nano-structure of nHPP was characterized,the effect of Friedel-Crafts crosslinking conditions on the porous structure was studied in detail,and the liquid phase adsorption performance of nHPP toward organic dye molecules in water was further investigated.The experimental results showed that nHPP presented a three-dimensional nano-network structure composed of hollow polymeric nanospheres stacked with each other,with a size of 154 nm for the hollow polymeric nanosphere network unit,and a shell thickness of about 7 nm.The polymer skeleton contains a large number of micropores,and the meso/macro pore structure derives from the stacking of polymeric nanospheres and the template cavities,thus forming a porous structure with hierarchical distribution of micro-,meso-and macropores.By controlling the reaction conditions,the BET(Brunauer-Emmett-Teller)specific surface area,microporous specific surface area,total pore volume and microporous pore volume can be well adjusted.The abundant and hierarchical porous structure of nHPP facilitates decent adsorption performance toward Congo red in water.The initial stage of the adsorption process is mainly controlled by the diffusion of Congo red in the external liquid film of the adsorbent,and the later stage is mainly controlled by the diffusion of Congo red in the particles in the internal pores of the adsorbent.

关 键 词：新型层次孔聚合物 傅克超交联 结构调控 液相吸附 

分 类 号：TQ427.26[化学工程]