以N,N-亚甲基双丙烯酰胺为交联剂,先通过光引发聚合制备聚丙烯酰胺水凝胶内嵌聚苯乙烯肢体晶体的聚合胶体晶体(PCC),再将PCC与氯化1-烯丙基-3-甲基咪唑离子液体进行溶剂置换,制备了离子液体聚合胶体晶体(ILPCC).采用反射光谱研究了制备过程中聚合肢体晶体结构的变化,考察了ILPCC的压力响应性和压缩性能.研究表明,离子液体使胶体晶体的带隙先蓝移后红移,达到平衡时带隙红移220 nm以上.离子液体显著改善了聚合胶体晶体的存储稳定性和压缩性能,为制备干态光子晶体提供了新途径.
The polymerized colloidal crystals (PCC) was prepared by photo-induced polymerization of acrylamide with embedded polystyrene colloidal crystals usin N,N'-methylenebis(2-propenamide) as cross-linker,and PCC was then put into 1-allyl-3-methylimidazolium chloride (AMIMCl) ionic liquid for solvent substitution to fabricate the ionic liquid polymerized colloidal crystals (ILPCC).The reflection spectrum was employed to study changes in structure of PCC during preparation,the pressure response and compression property were also investigated.The results show that the stop band of ILPCC is first blue shift followed by red shift in ionic liquid.The red shift is more than 220 nm at equilibrium.Ionic liquid significantly improves the storage stability and compression performance of PCC,which provides a new method for obtaining dry photonic crystals.
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