Affiliation:
1. Department of Materials Science and Engineering Seoul National University Seoul 08826 Republic of Korea
2. Department of Mechanical Design Engineering Hanyang University Seoul 04763 Republic of Korea
3. Department of Mechanical Engineering BK21 FOUR ERICA‐ACE Center Hanyang University Ansan 15588 Republic of Korea
4. Department of Agriculture Forestry and Bioresources Seoul National University Seoul 08826 Republic of Korea
5. Mobile Display Module Development Team Samsung Display Co., Ltd. Cheonan 31086 Republic of Korea
Abstract
AbstractWith growing sustainability concerns, the need for products that facilitate easy disassembly and reuse has increased. Adhesives, initially designed for bonding, now face demands for selective removal, enabling rapid assembly‐disassembly and efficient maintenance across industries. This need is particularly evident in the display industry, with the rise of foldable devices necessitating specialized adhesives. A novel optically clear adhesive (OCA) is presented for foldable display, featuring a unique UV‐stimulated selective removal feature. This approach incorporates benzophenone derivatives into the polymer network, facilitating rapid debonding under UV irradiation. A key feature of this method is the adept use of visible‐light‐driven radical polymerization for OCA film fabrication. This method shows remarkable compatibility with various monomers and exhibits orthogonal reactivity to benzophenone, rendering it ideal for large‐scale production. The resultant OCA not only has high transparency and balanced elasticity, along with excellent resistance to repeated folding, but it also exhibits significantly reduced adhesion when exposed to UV irradiation. By merging this customized formulation with strategically integrated UV‐responsive elements, an effective solution is offered that enhances manufacturing efficiency and product reliability in the rapidly evolving field of sustainable electronics and displays. This research additionally contributes to eco‐friendly device fabrication, aligning with emerging technology demands.
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science