Synthesis and characterization of a superhydrophobic surface from cyclic olefin copolymer

Abstract

Cyclic olefine copolymer (COC) which is an engineering plastic was tried to form a superhydrophobic surface by a phase separation process using solvent + non solvent mixtures. The cloud points of the COC + solvent + non-solvent mixtures were determined and evaluated by using Hansen 3-solubility parameter approach. It was determined that the amorphous COC polymer is not suitable to prepare a superhydrophobic surface when used alone. However, a superhdrophobic surface with a water contact angle of 158±2 0 was obtained when COC is mixed with crystalline polypropylene homopolymer. The water contact angle and surface morphology of the polymer coatings were examined.

Fabrication of superhydrophobic transparent cyclic olefin copolymer (COC)‐SiO2 nanocomposite surfaces

“…26,27,29,48 It is reported in the literature that the advancing contact angle of pure COC surface is between 101-104 0 and the receding contact angle is between 82-86 0. 51,57,65 The difference between advancing and receding contact angles is described as contact angle hysteresis (CAH, Δθ = θ a − θ r ), which is caused by surface roughness and surface chemical heterogeneity. CAH values of COC SiO 2 nanocomposites with changing nanoparticle amount (% wt) for different coating temperatures are given in Figure 1 (b).…”

“…52 Doganci and Erbil achieved a superhydrophobic COC surface by mixing it with crystalline polypropylene (PP) homopolymer. 57 Hong et al described a different method to obtain superhydrophobic and transparent COC surface by nanopatterning sub-20 nm nanograss. The contact angle increased to 155 0 and the transmittance was increased 4%.…”

“…Hwang and coworkers modified COC surface by plasma treatment under oxygen atmosphere and fabricated hydrophilic surfaces with contact angles under 20 0. 52 Doganci and Erbil achieved a superhydrophobic COC surface by mixing it with crystalline polypropylene (PP) homopolymer 57 . Hong et al described a different method to obtain superhydrophobic and transparent COC surface by nanopatterning sub‐20 nm nanograss.…”

Chiral Separation by a Pseudo Membrane in a Triple‐Laminar Flow with a Microfluidic Contactor

“…However, conventional plastic microfluidics from polydimethylsiloxane (PDMS) and cyclic olefin copolymers (COCs) are only usable in aqueous solution or water/ethanol mixtures, owing to their poor chemical stability against organic solvents. [11] Therefore, it is desirable to use an inorganic polymer-derived microfluidic device with a reliable organic microchemistry performance, as recently developed by our own group. [12] Chiral resolution activities towards ibuprofen were evaluated in this way by using several types of lipases without conventional analysis tools, such as test tubes or flasks.…”