Mechanical nondiscoloring and antistretching photonic crystal films based on Zn 2+ coordination and hydroxypropyl methylcellulose
Mechanical nondiscoloring and antistretching photonic crystal films based on Zn 2+ coordination and hydroxypropyl methylcellulose
复制标题
DOI：
10.1002/app.49916
复制
发表时间：
2021-01
影响因子：
3
通讯作者：
Xueyu Wang;Yong Qi;Shufen Zhang;W. Niu;Wei Ma;Suli Wu;Bingtao Tang
中科院分区：
文献类型：
--
作者：
Xueyu Wang;Yong Qi;Shufen Zhang;W. Niu;Wei Ma;Suli Wu;Bingtao Tang
机械不变色和抗拉伸的光子晶体（PC）薄膜，特别是在变形过程中具有稳定结构颜色的PC薄膜，在可穿戴显示器件、装饰和封装等方面具有巨大的应用潜力。本文将Zn ~（2+）配位弹性材料和羟丙基甲基纤维素（HPMC）与聚苯乙烯@二氧化硅（PS@SiO2）胶体晶体相结合，制备了具有抗拉伸和形变过程中结构色不变的PC薄膜。在应变过程中，PC薄膜通过在微观水平上形成局部断裂来释放能量，但局部阵列的晶格间距和有效折射率不发生变化。根据布拉格定律，结构颜色保持不变。羟丙基甲基纤维素（HPMC）的引入使PC膜具有优异的拉伸性能，最大拉伸强度可达10 MPa。在100次拉伸、弯曲和压缩循环后，结构颜色保持不变。
Mechanical nondiscoloring and antistretching photonic crystal (PC) films, especially those with stable structure colors during deformation, have great potential applications in wearable display devices, decoration, and packaging. Here, PC films with antistretching and invariant structural colors during deformation were prepared, by combining Zn2+coordinated elastic material and hydroxypropyl methylcellulose (HPMC) with polystyrene@silica (PS@SiO2) colloidal crystals. The PC films release energy by forming local fractures at a microscopic level during the straining process but the lattice spacing and effective refractive index of the local array do not change. According to the Bragg law, the structure color remains unchanged. The introduction of HPMC gave the PC films excellent tensile properties, and the maximum tensile strength reached 10 MPa. And after 100 times of stretching, bending and compression cycles, the structural color remained unchanged.