Biodegradable, Tackifier-free Pressure Sensitive Adhesive Derived from Cashew Nut Shell
발표자
허서정 (인하대학교)
연구책임자
김희중 (인하대학교)
공동저자
허서정 (인하대학교), 최권용 (현대자동차), 김희중 (인하대학교)
초록
내용
Pressure sensitive adhesives are widely used in products including sticky notes, tapes, and labels. However, most commercial PSAs are derived from fossil resources, rely on tackifiers, and are non-degradable, raising environmental issues. Therefore, the design of sustainable PSAs with competitive adhesion performance without tackifiers remains a critical challenge. In this study, we report tackifier-free polyurethane PSAs derived from cardanol, a renewable byproduct from cashew nut shells. The adhesives achieved high adhesion strength without tackifiers or plasticizers. This performance is attributed to the unsaturated bulky alkyl chains of cardanol in combination with the hydrogen bonding of urethane linkages, as confirmed through thermal and rheological characterizations. Additionally, the adhesives exhibited rapid degradation under mild conditions. This work provides high performance, degradable PSAs from renewable feedstocks and contributes to sustainable adhesive development.