Photon upconverting bioplastics with high efficiency and in-air durability
Photon upconverting bioplastics with high efficiency and in-air durability
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DOI：
10.1039/d1tc00287b
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发表时间：
2021-09-21
影响因子：
6.4
通讯作者：
Kimizuka, Nobuo
中科院分区：
文献类型：
--
作者：
Bharmoria, Pankaj;Hisamitsu, Shota;Kimizuka, Nobuo
用合成塑料代替生物塑料来实现可持续的可再生能源生产是迫切需要的。在这里，我们报告了一种简单的一步方法，通过将非挥发性发色团溶液封装到基于胶原蛋白的蛋白质薄膜中，来制造具有高效和持久光子上转换（UC）的生物塑料。通过仅仅干燥明胶、表面活性剂和UC发色团（敏化剂和湮灭剂）的水溶液，含有UC发色团的液体表面活性剂微滴被自发地限制在明胶薄膜内。由于微滴的高流动性和胶原纤维基质良好的氧屏障能力，即使在空气中也能获得15.6%的绝对TTA-UC效率和14.0 mW cm（-2）的低阈值激发强度。在环境条件下储存2年后，TTA-UC效率保持在8.2%，因此显示出实际应用所需的显著耐用性。
There is an urgent demand for substituting synthetic plastics to bioplastics for sustainable renewable energy production. Here, we report a simple one-step approach to create bioplastics with efficient and durable photon upconversion (UC) by encapsulating non-volatile chromophore solutions into collagen-based protein films. By just drying an aqueous solution of gelatin, surfactant, and UC chromophores (sensitizer and annihilator), liquid surfactant microdroplets containing the UC chromophores are spontaneously confined within the gelatin films. Thanks to the high fluidity of microdroplets and the good oxygen barrier ability of the collagen-based fiber matrices, a high absolute TTA-UC efficiency of 15.6% and low threshold excitation intensity of 14.0 mW cm(-2) are obtained even in air. The TTA-UC efficiency was retained up to 8.2% after 2 years of storage under ambient conditions, hence displaying the significant durability desired for practical applications.