One-pot interfacial polymerization to prepare PolyHIPEs with functional surface
One-pot interfacial polymerization to prepare PolyHIPEs with functional surface
复制标题
一锅界面聚合制备具有功能表面的PolyHIPE
DOI：
10.1007/s00396-015-3567-y
复制
发表时间：
2015-06-01
影响因子：
2.4
通讯作者：
Gao, Xiang
中科院分区：
文献类型：
--
作者：
Luo, Yingwu;Wang, An-Ni;Gao, Xiang
聚高内相乳液（PolyHIPE）整体材料因其制备简单、孔结构可控、性能优异而受到广泛关注。然而，在许多应用中，需要后改性，以实现特定的分离能力，反应性或吸收性等，在他们的表面上引入功能基团。在目前的工作中，我们提出了一锅界面聚合方法，以实现在一锅功能表面的复合PolyHIPES。从油包水（W/O）HIPE制备典型的聚苯乙烯PolyHIPE时，通过三种策略实现：（1）在常规HIPE聚合下，将水溶性引发剂过硫酸钾（KPS）和单体丙烯酸（AA）引入水相中，（2）通过可逆加成-断裂链转移将KPS和AA引入到高内相乳液的水相中（HIPE RAFT）活性自由基聚合，和（3）使用反应性两亲MacroRAFT试剂作为表面活性剂。所有这三种策略被证明是有效的，以产生不同的表面和本体组成的复合结构。X射线光电子能谱（XPS）刻蚀证实了AA在表面的富集。研究了它们对复合材料形貌和力学性能的影响。
Poly high internal phase emulsion (PolyHIPE) monolith has attracted many attentions for easy preparation, precise control on its porous structure, and excellent properties. In many applications, however, post-modification is needed to introduce functional groups onto their surfaces in order to achieve specific separation ability, reactivity or absorptivity, etc. In the current work, we proposed one-pot interfacial polymerization method to achieve composite PolyHIPEs with functional surface in one pot. It was realized by three strategies in preparing typical polystyrene PolyHIPEs from water-in-oil (W/O) HIPE: (1) introducing water-soluble initiator of potassium persulfate (KPS) and monomer of acryl acid (AA) into aqueous phase under conventional HIPE polymerization, (2) introducing KPS and AA into aqueous phase under high internal phase emulsions via reversible addition-fragmentation chain transfer (HIPE RAFT) living radical polymerization, and (3) employing reactive amphipathic MacroRAFT agent as surfactant. All these three strategies proved to be effective to generate a composite structure with different surface and bulk compositions. AA enrichment on the surface was verified by X-ray photoelectric energy spectrum (XPS) etching. Their effects on the morphology and mechanical properties were also studied.