Moving Contact Line Instability on Soluble Fibers

Abstract This paper presents a new kind of instability when inserting soluble fiber into liquid. After wetting and dissolving the by liquid, moving contact line (MCL) spontaneously loses stability. Because sculpted shape looks like Chinese pagoda, this is named as pagoda (PI). The coupling dissolution leads to other special phenomena, i.e., dissolving‐induced jet flow, optimizes shape, etc. A criterion PI proposed competition between interfacial energy chemical potential deduce MCL motion shown. phase diagram used summarize final shapes fibers. By conducting atomic force microscopy (AFM) measurements, it found that fibers with optimized have low adhesion force. Using can decrease influence capillary during AFM measurements in humid environments 70%.