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Moisture-resistant and highly adhesive acrylate-based sealing materials embedded with oxime-based photoinitiators for hermetic optical devices
Korean Journal of Chemical Engineering ( IF 2.7 ) Pub Date : 2021-11-20 , DOI: 10.1007/s11814-021-0962-6
Seung-Rak Son 1 , Jongil An 1 , Jin-Wook Choi 1 , Soyern Kim 1 , Jisung Park 1 , Chan Beom Park 1 , Jun Hyup Lee 1
Affiliation  

The hermetic sealing of optoelectronic devices has attracted much attention because it can endow the devices with long-term operation reliability and high mechanical resistance. Herein, we present a facile and efficacious strategy for fabrication of water-resistant and highly adhesive acrylate-based sealing materials for hermetic optical devices using oxime-based photoinitiators. Compared with conventional sealing materials containing ketone-based photoinitiator, those embedded with oxime-based photointiators afforded a strong UV absorption in the effective wavelength range, a high UV curing conversion of 99.5% at a low radiant energy of 1.0 J cm−2, a remarkable adhesion strength of 42.2 kgf cm−2, an improved water impermeability of 5.3 g m−2 day−1, and a reduced internal pollution length of 104.9 µm. These excellent properties of the fabricated sealing materials are attributed to the fragmentation mechanism of oxime-based photoinitiators which can generate numerous initiating radicals through multi-step decomposition reactions, resulting in the efficient initiation for photoreaction with acrylate resins. This study provides promising sealing materials based on the oxime-based photoinitiators for ultra-slim and flexible optoelectronic applications.



中文翻译:

用于密封光学器件的嵌入肟基光引发剂的防潮、高粘性丙烯酸酯基密封材料

光电子器件的气密密封因其可以赋予器件长期运行可靠性和高机械阻力而备受关注。在此,我们提出了一种简便有效的策略,用于使用肟基光引发剂制造用于密封光学器件的防水和高粘性丙烯酸酯基密封材料。与传统的含有酮基光引发剂的密封材料相比,嵌入肟基光引发剂的密封材料在有效波长范围内具有很强的紫外吸收,在 1.0 J cm -2的低辐射能下,紫外光固化转化率高达 99.5% , 42.2 kgf cm -2 的显着粘合强度,5.3 gm -2天的改进的防水性-1,内部污染长度减少到 104.9 µm。所制备的密封材料的这些优异性能归因于肟基光引发剂的裂解机制,其可通过多步分解反应产生大量引发自由基,从而有效引发与丙烯酸树脂的光反应。该研究为基于肟基光引发剂的超薄柔性光电应用提供了有前景的密封材料。

更新日期:2021-11-20
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