Superhydrophobic Polypropylene Surfaces Prepared with TiO₂ Nanoparticles Functionalized by Dendritic Polymers

Abstract

Hybrid inorganic–organic nanomaterials have received increasing interest due to the possibility of implementing different functions and characteristics within a single material. Their functionalities are a consequence of the synergy of the properties of distinct building blocks and are related to their varied natures and spatial locations. In this work, we present the development of superhydrophobic properties on polypropylene (PP) surfaces using hybrid nanomateriales from TiO2 nanoparticles (NPs) and dendronized polymers. The dendron acryl Behera's amine was successfully grafted on the TiO2 NP surfaces by Surface‐Initiated Atom Transfer Radical Polymerization (SI‐ATRP) and a core‐brush material was obtained. Finally, PP substrates were coated with NP hybrids to produce superhydrophobic surfaces with water contact angles of over 158 degrees. Controlling the organic silane concentration on the TiO2 NPs allowed the dendronized process to be driven and thereby permitted the selection of specific wettability properties on PP substrate surfaces with high water adhesion or self‐cleaning conditions. This dendronized effect with consequent steric congestion of the polymeric brushes on the NPs changed their behaviors from Wenzel to the Cassie Baxter state. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018, 56, 2019–2029

Controlling dispersion, stability and polymer content on PDEGMA-functionalized core-brush silica colloids

“…a new class of materials that exhibit improved performance for the design and control of the properties of polymers and surfaces compared to their microparticle counterparts. [9][10][11][12][13][14] In this context, several research works have shown that the dispersibility, the degree of particle aggregation and the nanoparticle surface chemistry are key parameters for the control of the stability, structure, physical and mechanical properties of nanocomposites, suspensions, foams and mixtures of polymers, maintaining the cohesion between the particles and the host matrix under shearing or thermal constraint. [8,15,16] Among the various inorganic oxides, silica particles have received much attention due to their, high surface area, cost-effective production, and the simple surface modification, biocompatibility and cost-effective production.…”

“…I P T remaining inorganic mass, SNP, VNP and ρ correspond to the surface, volume and density of the SiO2 NPs from geometric estimations, NA is the Avogadro's number, Morg is the molecular weight of the incorporated organic group and m0 is initial mass. For the nanoparticle density, ρ, we assumed a value of 1.58 g/cm 3 from literature [12,28,38]. Dynamic light scattering (DLS) DLS measurement was performed in a BI-200SM Goniometer Ver.…”

A light-remote-controllable Core-Shell-Brush nanosystem prepared through a sequential one-pot strategy

“…Where morg is the final mass difference, minorg is the remaining inorganic mass, SNP, VNP and ρ correspond to the surface, volume and density of the SiO2 NPs from geometric estimations, NA is the Avogadro's number, Morg is the molecular weight of the incorporated organic group literature was assumed. [53][54][55] 2.5.4 UV-Vis measurements…”

Microwave‐Assisted Fabrication of Superamphiphobic Surfaces on Aluminum Substrates

“…[ 1,2 ] Those two articles, now reaching nearly 7,000 citations together, open the way for multiple practical applications, such as self‐cleaning, [ 3,4 ] anticorrosion, [ 5–7 ] anti‐icing, [ 8–10 ] low drag resistance, [ 11 ] antimicrobial and antiadhesive, [ 12–14 ] oil–water separation, [ 15,16 ] microelectronic, [ 17 ] among many others. The fabrication of those hierarchical surfaces involves many different techniques, such as vapor deposition, [ 18,19 ] sol–gel, [ 6,20,21 ] plasma treatments, [ 22,23 ] etching, [ 24–26 ] 3D printing, [ 17 ] polymerization, [ 27–29 ] electrochemical deposition, [ 7,30 ] and spray. [ 25,31,32 ]…”

“…[1,2] Those two articles, now reaching nearly 7,000 citations together, open the way for multiple practical applications, such as self-cleaning, [3,4] anticorrosion, [5][6][7] anti-icing, [8][9][10] low drag resistance, [11] antimicrobial and antiadhesive, [12][13][14] oil-water separation, [15,16] microelectronic, [17] among many others. The fabrication of those hierarchical surfaces involves many different techniques, such as vapor deposition, [18,19] sol-gel, [6,20,21] plasma treatments, [22,23] etching, [24][25][26] 3D printing, [17] polymerization, [27][28][29] electrochemical deposition, [7,30] and spray. [25,31,32] More recently, the preparation of refined microstructures that possess reentrant textures [32][33][34][35][36][37] has allowed, after chemical functionalization, the fabrication of super-repellent surfaces to high surface tension liquids as well as low ones.…”