二维泡沫的演变控制、图案化及应用研究

Foams have wide applications in industry because of their lightness, large surface area, and the fact that they exhibit both solid and liquid behaviors. However, it remains a challenge to manipulate the evolution of foams, which restricts their further applications. Based on the principle that micropatterned surface can effectively regulate the gas-liquid interface, this work focuses on manipulating the evolution of two demintional (2D) foams with a micropatterned surface. The micropatterned surface can guide the evolution of 2D foams into various patterns, which have many applications in acoustics, electrics and optics. For example, new understanding about foam acoustics will be acquired by measuring the acoustic properties of patterned 2D foams. The patterned foams can serve as the template for assembly of functional nanoparticles, which assist the fabrication of optoelectronic devices. Combining the designing of aperiodic grid, the patterned 2D foams can contribute the fabrication of moiré-free transparent conductive film.

泡沫因具有低密度、高比表面积、可压缩性等特殊性质而在工业和生活中广泛的应用。但传统认为泡沫的结构随着时间的演变无法调控，因而限制了泡沫研究的进一步发展和应用。本项目首先提出利用固体表面的微结构调控二维泡沫的演变，进而实现二维泡沫的可控图案化的新思路；进一步研究图案化的二维泡沫在泡沫声学、电学、光学方面的新应用。比如，通过对图案化二维泡沫的声学性质的研究，实现对泡沫声学的新认知；以图案化的二维泡沫为模板组装纳米功能材料，实现光电功能器件的制备；借助非周期图案化的设计，实现防莫尔条纹的透明导电膜的制备等。

系统研究了印刷微模板上图案化微柱的间距、排列等因素对二维泡沫演变的影响规律，拓展了泡沫演变的控制理论，实现泡沫的可控图案化，发展泡沫声子晶体的可控制备技术及对其声波的有效调控方法。此外，利用二维泡沫的可控演变，诱导纳米功能材料的可控图案化组装，构造高性能光电器件。控制泡沫演变形成非周期的图案，制备非周期结构的透明导电膜，验证其在电子显示中消除莫尔条纹的性能。本项目在 Nature Commun., Sci. Adv., Adv. Mater., Angew. Chem. Int. Ed.等学术期刊发表论文 81 篇，申请/授权中国发明专利 5 项，应邀在国内外学术会议做邀请报告 21 次，获2019年度国际电工技术委员会（IEC）“1906奖”。