| 초록 |
Hydroxypropyl methylcellulose (HPMC), an FDA-approved water-soluble cellulose derivative, has been used as a binder in wet-adhesion applications for 70 years; however, its adhesion mechanism has not been elucidated. Here, we measured the temperature-dependent adhesion characteristics of HPMC using a surface forces apparatus (SFA). The results show that HPMC adhered strongly to all tested surfaces, regardless of their hydrophobicity. The adhesive of HPMC increased with temperature because of entropy-driven hydrophobic interactions and more exposure of hydrogen bonding site due to swelling, exceeding the wet-adhesion strength of most biological adhesives. The bulk compression tests of the HPMC–silica composite were consistent with the SFA data, indicating that the water content and temperature were critical variables for the HPMC adhesion. |
