Monochromatic Visible Light 鈥淧hotoinitibitor鈥? Janus-Faced Initiation and Inhibition for Storage of Colored 3D Images

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• 作者：Haiyan Peng ; Shuguang Bi ; Mingli Ni ; Xiaolin Xie ; Yonggui Liao ; Xingping Zhou ; Zhigang Xue ; Jintao Zhu ; Yen Wei ; Christopher N. Bowman ; Yiu-Wing Mai
• 刊名：Journal of the American Chemical Society
• 出版年：2014
• 出版时间：June 25, 2014
• 年：2014
• 卷：136
• 期：25
• 页码：8855-8858
• 全文大小：298K
• ISSN：1520-5126

文摘

Controlling the kinetics and gelation of photopolymerization is a significant challenge in the fabrication of complex three-dimensional (3D) objects as is critical in numerous imaging, lithography, and additive manufacturing techniques. We propose a novel, visible light sensitive 鈥減hotoinitibitor鈥?which simultaneously generates two distinct radicals, each with their own unique purpose鈥搊ne radical each for initiation and inhibition. The Janus-faced functions of this photoinitibitor delay gelation and dramatically amplify the gelation time difference between the constructive and destructive interference regions of the exposed holographic pattern. This approach enhances the photopolymerization induced phase separation of liquid crystal/acrylate resins and the formation of fine holographic polymer dispersed liquid crystal (HPDLC) gratings. Moreover, we construct colored 3D holographic images that are visually recognizable to the naked eye under white light.