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由单分散聚苯乙烯乳液制备了聚苯乙烯胶体晶体阵列,并采用光引发聚合法用聚丙烯酰胺凝胶成功固定了胶体晶体阵列,制备了在可见光下显示明亮Bragg衍射光的凝胶光子晶体膜(PCCA).该PCCA膜具有优异复水性能和循环使用性能.在浓度5%~30%范围内,乙醇浓度每改变5%,其Bragg衍射峰平均移动超过20 nm;水解后PCCA膜具有良好的p H响应性.随p H值增加,当p H值的范围为2.36~8.15时,其Bragg衍射峰红移;当p H值大于9.6时,其Bragg衍射峰蓝移.而且凝胶光子晶体膜Bragg衍射峰移动对应的颜色变化很容易实现裸眼识别.
Polystyrene colloidal crystal arrays were prepared from monodisperse polystyrene emulsion. The colloidal crystal arrays were successfully immobilized on polyacrylamide gel by photoinitiation polymerization. Gel photonic crystals with bright Bragg diffracted light in visible light were prepared (PCCA) .The PCCA membrane has excellent rehydration performance and recycling performance.At 5% ~ 30% concentration range, the Bragg diffraction peak shifts more than 20 nm every time the ethanol concentration changes by 5% Good p H response.With increasing p H value, the Bragg diffraction peak shifts red when p H value ranges from 2.36 to 8.15, blue shift to the Bragg diffraction peak when the p H value is greater than 9.6, and the gel Photonic crystal film Bragg diffraction peak shift corresponding to the color change is easy to achieve naked eye recognition.