Usage of Colloidal AFM Probe for Research in Effects of Water Layer Evaporation on Interfacial Adhesion between Cellulose Surfaces

Effects of the water layer evaporation on the interfacial adhesion between cellulose surfaces are researched via the atomic force microscopy (AFM) method in this article. A cellulose colloidal probe (CCP) is prepared through a dual-probe micromanipulation system, which is used to detect this time-varying adhesive interaction. The AFM system configuration, detailed fabrication of the CCP, principle of the adhesion measurement, and relevant calibration tasks are reported before the characterization. Several groups of adhesion mapping experiments have been executed at different divided periods after the water film forming on the sample surface of the cellulose membrane. The obtained results show that the interfacial adhesion has a significant downward trend when the water layer passing over time. In addition, the correlation of the surface topography and adhesion is displayed. The industrial applications of cellulose are inseparable from the participation of water solvent, meanwhile appropriate process adjustments according to the bonding strength between the cellulose surfaces during pulping and drying is necessary. This research can provide support in above occasions, which has its unique significance on the improving of processing technology.