| 초록 |
Natural adhesives derived from the bio-materials such as proteins and carbohydrates are safe and renewable materials with low price. Especially, natural material-based polyurethane(PU) adhesives have been extensively studied due to their unique characteristics, such as amenable curing speeds, formaldehyde emission-free, good weather resistance and excellent adhesion. For an example, PU adhesives for bonding wood veneers made from potato starch/natural oil-based polyol and TDI are reported. However their synthetic methods require complicated, costly and/or multi-step processes. In this study, rice powder(RP) as a carbohydrate source has been chosen because it is inexpensive and has hydroxyl functional groups that can easily provide chemical cross-linking reactions with isocyanates of pMDI. The practical synthetic method we developed for PU adhesives is two-component solution process. |
