Mechanically robust, flame-retardant phosphorylated cellulose films with tunable optical properties for light management in LEDs.
Mechanically robust, flame-retardant phosphorylated cellulose films with tunable optical properties for light management in LEDs.
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DOI：
10.1016/j.carbpol.2022.120129
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发表时间：
2022-09
影响因子：
11.2
通讯作者：
Gaoyuan Hou;Sishun Zhao;Yujie Li;Zhiqiang Fang;Akira Isogai
中科院分区：
文献类型：
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作者：
Gaoyuan Hou;Sishun Zhao;Yujie Li;Zhiqiang Fang;Akira Isogai
生物可降解纤维素薄膜具有优异的机械、光学和功能特性，作为光电子器件中塑料的有前途的替代品引起了人们的广泛关注。在这项工作中，机械延展性，阻燃纤维素薄膜与可调的光学性能制备简单的机械解体的磷酸化纤维素（PhC）纤维，真空过滤所制备的分散体，随后压制的湿PhC膜，以制备干膜。当机械崩解条件进行了优化，所得的PhC膜表现出的平均密度，拉伸强度，杨氏模量，拉伸韧性，和耐折性为1.4 g/cm 3，150 MPa，8.5 GPa，8.2 MJ/m3，和4580倍，分别。PhC膜雾度在9%至91%范围内可广泛控制，同时它们在550 nm波长处保持高透光率（> 90%）。通过控制PhC纤维/水浆料的机械原纤化条件，将PhC膜用于发光二极管的光管理，表明该膜有效地改善了器件的发光均匀性。
Biodegradable cellulose films with excellent mechanical, optical, and functional properties have attracted considerable attention as promising alternatives to plastics for photoelectronic devices. In this work, mechanically ductile, flame-retardant cellulose films with tunable optical properties were prepared by simple mechanical disintegration of phosphorylated cellulose (PhC) fibers, vacuum filtration of as-prepared dispersions, and subsequent pressing of the wet PhC films to prepare dried films. When mechanical disintegration conditions were optimized, the resultant PhC films exhibited an average density, tensile strength, Young's modulus, tensile toughness, and folding resistance of 1.4 g/cm3, 150 MPa, 8.5 GPa, 8.2 MJ/m3, and 4580 times, respectively. The PhC film hazes were widely controllable from 9 % to 91 %, while they maintained high light transmittances (>90 %) at a 550-nm wavelength. The PhC films were used for light management of light-emitting diodes by controlling mechanical fibrillation conditions of the PhC fiber/water slurry, showing that the films effectively improved the luminescence uniformity of the devices.