Transparent 'solution' of ultrathin magnesium hydroxide nanocrystals for flexible and transparent nanocomposite films
Transparent 'solution' of ultrathin magnesium hydroxide nanocrystals for flexible and transparent nanocomposite films
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用于柔性透明纳米复合材料薄膜的超薄氢氧化镁纳米晶体的透明“解决方案”
DOI：
10.1088/0957-4484/26/19/195602
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发表时间：
2015
期刊：
影响因子：
3.5
通讯作者：
Chen Jian-Feng
中科院分区：
文献类型：
--
作者：
Wang Jie-Xin;Sun Qian;Chen Bo;Wu Xi;Zeng Xiao-Fei;Zhang Cong;Zou Hai-Kui;Chen Jian-Feng
纳米晶体的透明溶液表现出许多独特的性质，因此对于许多应用是有吸引力的材料。然而，具有广泛用途的透明氢氧化镁（MH）水溶液的合成尚未实现。本文报道了一种简单的两步法，该方法包括在醇相中直接反应沉淀而不是在水相中直接反应沉淀，并结合后续的表面修饰，制备了透明的醇溶液，其中含有平均尺寸为52 nm，厚度为1-2 nm的片状MH纳米晶体，这是文献报道的最薄的MH纳米片晶。此外，通过向PVB溶液中加入透明的MH+溶液，用溶液混合法制备了高度柔性和透明的纳米复合膜。考虑到制备工艺的简单性、高透明度和良好的柔性，这种MH/聚合物纳米复合膜在具有高透明度的塑料电子和光学器件中的阻燃应用是有希望的，例如柔性显示器、光学滤波器和柔性太阳能电池。
Transparent solutions of nanocrystals exhibit many unique properties, and are thus attractive materials for numerous applications. However, the synthesis of transparent nanocrystal solutions of magnesium hydroxide (MH) with wide applications is yet to be realized. Here, we report a facile two-step process, which includes a direct reactive precipitation in alcohol phase instead of aqueous phase combined with a successive surface modification, to prepare transparent alcohol solutions containing lamellar MH nanocrystals with an average size of 52 nm and an ultrathin thickness of 1–2 nm, which is the thinnest MH nanoplatelet reported in the literatures. Further, highly flexible and transparent nanocomposite films are fabricated with a solution mixing method by adding the transparent MH nanocrystal solutions into PVB solution. Considering the simplicity of the fabrication process, high transparency and good flexibility, this MH/polymer nanocomposite film is promising for flame-resistant applications in plastic electronics and optical devices with high transparency, such as flexible displays, optical filters, and flexible solar cells.