title: Evolution of polyvinylidene fluoride (PVDF) hierarchical morphology during slow gelation process and its superhydrophobicity.
abstract: In the paper, we proposed an evolution process of polyvinylidene fluoride (PVDF) macromolecular aggregation in a mixed solvent through the simple and slow gelation process at room temperature. The mixed solvent is prepared with a room-temperature solvent and a high-temperature solvent. The evolution process can be terminated by quenching and exchanging with nonsolvent in a nonsolvent coagulation bath properly, and then the vivid petal-like nanostructure and microspherulite is formed simultaneously. This hierarchical morphology endows PVDF with superhydrophobic and self-cleaning properties, which is useful to PVDF coating and membrane materials. The evolution processes are investigated through the measurements of differential scanning calorimetry (DSC), X-ray diffraction (XRD). In addition, the rheological properties of solution, dry gel and wet gel, are explored.
authors.affiliation: School of Materials Science and Engineering, State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Tianjin Polytechnic University, Tianjin 300160, People's Republic of China. xianfengli022@gmail.com
authors.forename: Xianfeng
authors.initials: X
authors.lastname: Li
authors.forename: Chong
authors.initials: C
authors.lastname: Zhou
authors.forename: Runhong
authors.initials: R
authors.lastname: Du
authors.forename: Nana
authors.initials: N
authors.lastname: Li
authors.forename: Xutong
authors.initials: X
authors.lastname: Han
authors.forename: Yufeng
authors.initials: Y
authors.lastname: Zhang
authors.forename: Shulin
authors.initials: S
authors.lastname: An
authors.forename: Changfa
authors.initials: C
authors.lastname: Xiao
mesh_terms: D002152:Calorimetry, Differential Scanning; D055119:Elastic Modulus; D005782:Gels / Q000737:chemistry*; D057927:Hydrophobic and Hydrophilic Interactions; D049329:Nanostructures / Q000737:chemistry / Q000648:ultrastructure; D011145:Polyvinyls / Q000737:chemistry*; D012212:Rheology; D013696:Temperature; D014961:X-Ray Diffraction; D005465:Fluorocarbon Polymers
chemical_list: D005782:Gels; D011145:Polyvinyls; C024865:polyvinylidene fluoride; D005465:Fluorocarbon Polymers