Non-yellowish and heat-resistant adhesive for a transparent heat sinking film

• Published in: Journal of industrial and engineering chemistry (Seoul, Korea) 2021, 103(0), , pp.275-282
• Main Authors: Ryu, Hyewon, Choi, Hyesu, Shin, Joo hwan, Hong, Healeen, Park, Byeonghak, Lee, Eun Gyeong, Kim, Tae-il
• Format: Article
• Language: English
• Subjects: Irgacure 184; Non-yellowish adhesive (NYA); Photo-initiator; Transparent heat dissipation film; 화학공학
• ISSN: 1226-086X; 1876-794X
• DOI: 10.1016/j.jiec.2021.07.036

The development of optical communication techniques and optical components is rapidly progressing in the era of high-speed information communication. In this area, many studies have been carried out to investigate highly transparent optical adhesives. UV-curing adhesives, which rely on irradiating ultraviolet rays, are a major candidate for use in this field. However, they suffer from thermal degradation and discoloration due to long-term UV irradiation. Thus, in this study, we present a transparent adhesive by replacing the photo-initiator to improve the yellowish discoloration phenomenon, which affects aging and low surface quality. By replacing 2-benzyl-2-(dimethylamino)-4′-mopholinobutyrophenone, which causes yellow changes due to a red-shift and donation electron groups, with α -hydroxycyclohexylphenyl ketone, this approach was successful to improve the yellowish discoloration problem. By taking advantage of the excellent thermal and mechanical stabilities in addition to resistance to long-term UV irradiation, a transparent heat dissipation film formed by grid-patterned boron nitride nanosheets was manufactured by a transfer printing method. The film can be utilized as a major component in electrical and optical films which require thermal resistivity and optical transparency.