Preparation and photochromic properties of phosphomolybdic acid/rare earth strontium aluminate luminous fiber
Preparation and photochromic properties of phosphomolybdic acid/rare earth strontium aluminate luminous fiber
复制标题
磷钼酸/稀土铝酸锶夜光纤维的制备及其光致变色性能
DOI：
10.1088/2053-1591/abab41
复制
发表时间：
2020-08-01
影响因子：
2.3
通讯作者：
Yu, Yuan
中科院分区：
文献类型：
--
作者：
Li, Jing;Tang, Sisi;Yu, Yuan
在这项研究中，我们打算通过磷钼酸颜料（PAP）的光电子转移获得一种具有颜色调节发光的新型发光纤维。该发光纤维以SrAl2O4:Eu2+、Dy3+材料为发光源，PAP与聚乙烯醇的固溶体为光引发剂，氨基硅树脂(ASR)为表面改性成膜材料，聚丙烯(PP)为基体，采用熔融纺丝法制备而成。使用扫描电子显微镜 (SEM)、傅里叶变换红外 (FTIR) 光谱、紫外-可见 (UV-vis) 光谱、光致发光发射光谱和 CIE-1931 色度坐标对表面形貌进行表征。因此，获得了有希望的结果，表明通过调节PAP浓度，发光纤维的发光颜色可以从黄绿色转变为蓝色。这些发光纤维的 PL 发射光谱由 430-530 nm 范围内的两个发射峰区域组成。当PAP浓度为50%时，纤维中两个发射峰的强度达到最大值。此外，当将纤维放置在黑暗的地方时，纤维逐渐变成蓝色，并且发光衰减。研究发现，光敏变色的存在与发光表面材料涂覆的有机硅树脂中嵌入的氨基直接相关，该氨基与PAP通过光还原过程反应产生磷钼蓝。这些发现为开发下一代发光材料和多色发光纤维提供了宝贵的见解。
In this study, we intend to obtain a novel luminous fiber with colour-tuned luminescence via the photoelectron transfer of a phosphomolybdic acid pigment (PAP). The luminous fiber include the SrAl2O4: Eu2+, Dy3+ materials as the luminescence sources, a solid solution of PAP and polyvinyl alcohol as the photoinitiator, amino silicone resin (ASR) as the surface-modified film-forming material and polypropylene (PP) as the matrix, which are prepared by the melt spinning method. The surface morphology was characterized using scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, ultraviolet-visible (UV–vis) spectroscopy, photoluminescence emission spectroscopy, and CIE-1931 chromaticity coordinates. Thus, promising results were obtained, which denoted that the luminescence colour of the luminous fibers could transform from yellow–green to blue by adjusting the PAP concentration. The PL emission spectra of these luminous fibers consisted of two emission peak regions in the range of 430–530 nm. The intensity of the two emission peaks in the fiber reaches the maximum when the concentration of the PAP was 50%. Further, the fibers gradually turned blue with luminescence decay when the fiber was placed in a dark place. The existence of photosensitive discoloration was found to be directly related to the amino groups embedded in the silicone resin coated with the luminous surface material, which reacted with PAP to develop phosphorous molybdenum blue via the photo-reduction process. These findings provide valuable insights toward developing next-generation luminescent materials and multicolor luminous fibers.