Diffraction Properties of Solvent-Assisted Reinforced Hydrogel Photonic Crystal
Monodisperse polystyrene latex was synthesized by boiling polymerization,and colloidal crystal array(CCA)was obtained by electrostatic self-assembly of polystyrene.The CCA and polyvinyl alcohol(PVA)was mechanically mixed and frozen-thawed into gelated colloidal crystal array(GCCA).Due to the poor mechanical properties of PVA,the solvent-assistant method was used in the physical gelation process,and ethylene glycol(EG)was used as the assistant solvent,which significantly improved the tensile properties of the GCCA.The changes in optical properties of GCCA were investigated under different stretching conditions,and the results show that the diffraction wavelength of GCCA increases as the stretching length increases.The certain linear relationship proves that GCCA can respond to external tensile stress within the visible light wavelength range.
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