A Facile All-Solution-Processed Surface with High Water Contact Angle and High Water Adhesive Force

Abstract

A series of sticky superhydrophobicity surfaces with high water contact angle and high water adhesive force is facilely prepared via an all-solution-processed method based on polymerization-induced phase separation between liquid crystals (LCs) and epoxy resin, which produces layers of epoxy microspheres (EMSs) with nanofolds on the surface of a substrate. The morphologies and size distributions of EMSs are confirmed by scanning electron microscopy. Results reveal that the obtained EMS coated-surface exhibits high apparent contact angle of 152.0° and high water adhesive force up to 117.6 μN. By varying the composition of the sample or preparing conditions, the sizes of the produced EMSs can be artificially regulated and, thus, control the wetting properties and water adhesive behaviors. Also, the sticky superhydrophobic surface exhibits excellent chemical stability, as well as long-term durability. Water droplet transportation experiments further prove that the as-made surface can be effectively used as a mechanical hand for water transportation applications. Based on this, it is believed that the simple method proposed in this paper will pave a new way for producing a sticky superhydrophobic surface and obtain a wide range of use.

Textured and Hierarchically Constructed Polymer Micro- and Nanoparticles

“…Interest in micro-and nanoparticles has generally been increasing, particularly in polymer particles with enhanced surface roughness and structure, to meet applicationspecific demands such as controlled drug delivery [1,2], super-hydrophobic [3] and icephobic [4,5] surfaces, attachment of cells [6], and adhesion of metal nanoparticles [7,8]. For these purposes, the particle surface can be modified by introducing wrinkles and corrugations [1,3,6,[9][10][11][12][13][14] as well as controlled or self-assembly of particles [15][16][17] into aggregates.…”

Study on the Effect of α-Substituted Acrylate Monomers on the Electro-Optical Properties of Polymer-Dispersed Liquid Crystal Films

“…Besides, the nodules exist in random positions and exhibit irregular shapes. The formation of the polymer microsphere morphology can be attributed to the poor miscibility of the LC and the monomer, which results in the special aggregation of monomers and polymer crystallization. ,− The introduction of a relatively high content of hydroxyl groups in monomer M2HA brings about a strong hydrogen bond interaction and reduces the miscibility between the LC and the monomer. − …”

Dual-Band Modulation of Visible and Near-Infrared Light Transmittance in an All-Solution-Processed Hybrid Micro–Nano Composite Film

“…Unless specified, the chemicals were purchased from Sigma-Aldrich (St. Louis, MO). E7, used as LCs with a positive dielectric constant (P-LCs), was purchased from Shijiazhuang Yongsheng Huatsing Liquid Crystal Co., Ltd. Photoinitiator, Irgacure 651, was obtained from TCI Co., Ltd. Hydroxypropyl methacrylate (HPMA) and dodecyl methacrylate (LMA) were purchased from Tokyo Chemical Industry Co., Ltd. Polyethylene glycol diacrylate (PEGDA600) was provided by Sartomer Co., Ltd. Liquid-crystalline acrylate monomers (LAMs), C6M, were synthesized according to the methods suggested by Broer et al and Gray et al LC-0518#, used as LCs with a negative dielectric constant (N-LCs), were homemade LCs mixture with a negative dielectric constant suggested by the literature . The glass beads and the conducting PET films were purchased from Sekisui Chemical Co., Ltd. and Kangdexin Composite Material Co., Ltd., respectively.…”