Rapid preparation and properties of P(St-MAA)/WPU composite photoniccrystal color-generating structure on textile substrate

doi:10.19398/j.att.202105006

Abstract

Abstract:

In order to quickly prepare a photonic crystal color-generating structure with both good structural color effects and high structural stability, a filling method is put forward to fabricate composite photonic crystals. First of all, the pre-assembly solution of poly(styrene-methacrylic acid) (P(St-MAA)) colloidal microspheres is sprayed on the polyester substrate to obtain photonic crystals, and then waterborne polyurethane (WPU) is sprayed on these P(St-MAA) photonic crystals. Finally, P(St-MAA)/WPU composite photonic crystals are obtained. The impact of the mass fraction of WPU on the arrangement of photonic crystals, structural color effects, and structural stability are investigated and optical properties of P(St-MAA)/WPU composite photonic crystals are analyzed. The results show that spraying WPU doesn’t cause damage to the original regular arrangement of photonic crystals, but infiltrates into the gap between P(St-MAA) microspheres preferentially, gradually replaces air in the original photonic crystals, and finally wraps P(St-MAA) microspheres. The filling of WPU increases the mean refractive index of the P(St-MAA)/WPU composite photonic crystals, leading to a red shift in the hue of structural color. The structural stability of P(St-MAA)/WPU composite photonic crystal is superior to that of P(St-MAA) photonic crystals. Moreover, the greater mass fraction of WPU, the more obviously the stability is improved. The composite photonic crystals obtained by spraying WPU still show good structural color effects and obvious iridescent effects. The research findings provide a simple method for rapid preparation of photonic crystals with bright structural colors and stable structures on textile substrates, and effectively facilitate the practical application of photonic crystal color-generating structure.

Key words: photonic crystal, structural color, stability, waterborne polyurethane (WPU) solution, poly(styrene-methacrylic acid) (P(St-MAA)), colloidal microspheres

摘要：

为快速制备兼顾结构色效果和结构稳定性的光子晶体生色结构,提出了一种采用填充法制备复合光子晶体的方法。先将聚(苯乙烯-甲基丙烯酸)(P(St-MAA))胶体微球预组装液喷涂于涤纶基材上制备光子晶体,再利用水性聚氨酯(WPU)对P(St-MAA)光子晶体上进行二次喷涂,最终得到P(St-MAA)/WPU复合光子晶体。探究WPU质量分数对光子晶体排列、结构色效果、结构稳定性的影响,并分析P(St-MAA)/WPU复合光子晶体的光学性能。结果表明:喷涂WPU不会破坏光子晶体原有的规整排列,其会优先渗入P(St-MAA)微球间的缝隙中,逐渐替代原光子晶体内中的空气,最终实现对P(St-MAA)微球的包裹;WPU的填充使得P(St-MAA)/WPU复合光子晶体的平均折射率增加,结构色色相产生红移现象;P(St-MAA)/WPU复合光子晶体的结构稳定性高于P(St-MAA)光子晶体,且WPU的质量分数越大,稳定性改善程度越明显;喷涂WPU后所得的复合光子晶体结构仍呈现出良好的结构色效果且虹彩效应明显。研究结果为在纺织基材上快速制备兼具鲜艳结构色和稳定结构的光子晶体提供了简便方法,可推动光子晶体生色结构的实际应用。

关键词: 光子晶体, 结构色, 稳定性, 水性聚氨酯(WPU)溶液, 聚(苯乙烯-甲基丙烯酸)(P(St-MAA)), 胶体微球

CLC Number:

TS193

HE Wenyu, GAO Yafang, ZHANG Yunxiao, JIN Mengting, ZHOU Lan, WANG Xianglin, LIU Guojin. Rapid preparation and properties of P(St-MAA)/WPU composite photoniccrystal color-generating structure on textile substrate[J]. Advanced Textile Technology, 2022, 30(2): 159-168.

何文玉, 高雅芳, 张耘箫, 金梦婷, 周岚, 王相林, 刘国金. 纺织基材上P(St-MAA)/WPU复合光子晶体生色结构的快速制备及其性能[J]. 现代纺织技术, 2022, 30(2): 159-168.

Figures/Tables 12

Fig.1 EDS spectrums of P(St-MAA)photonic crystals(PCs) beforeand afterspraying WPU

Fig.2 FESEM images of P(St-MAA)/WPU composite PCs structural colors obtained by spraying different mass fractions of WPU

Fig.3 The three-dimensional video-microscope images of P(St-MAA)/WPU composite PCs structural colors obtained by spraying different mass fractions of WPU

Fig.4 The reflectance curves of P(St-MAA)/WPU composite PCs obtained by spraying different mass fractions of WPU

Fig.5 The three-dimensional video-microscope images of P(St-MAA)/WPU composite PCs structural colors obtained by spraying different mass fractions of WPU after folding

Fig.6 The three-dimensional video-microscope images of P(St-MAA)/WPU composite PCs structural colors obtained by spraying different mass fractions of WPU after washing

Fig.7 The reflectance of P(St-MAA)/WPU composite PCs before and after washing

Fig.8 The three-dimensional video-microscope images of P(St-MAA)/WPU composite PCs structural colors obtained by spraying different mass fractions of WPU after friction

Fig.9 The reflectance of P(St-MAA)/WPU composite PCs before and after friction

Fig.10 The digital photos of P(St-MAA)/WPU composite PCs structural color patterns obtained by spraying different particle sizes of P(St-MAA) microspheres

Fig.11 The photos and reflectance curves of P(St-MAA)/WPU composite PCs structure under different testing angles.

Fig.12 The digital photos of P(St-MAA)/WPU composite PCs structural color patterns from different angles

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