Effect of tri(methoxysilyl)propyl methacrylate silane modified nanosilica on some properties of acrylic coating

Abstract

Acrylic emulsion resin is one of popular matrixes for both outside and inside coatings. It has low cost, high UV and weather resistance, good aesthetics and environmentally friendly. The introduction of inorganic additives in nanosize such as SiO2, TiO2, etc. into acrylic emulsion resin could improve the mechanical and thermal properties of the polymer matrix. The surface modification of nanoparticles can enhance the dispersibility of the nanoparticles in the polymer matrix. This paper presents the characteristics of nanosilica modified with different contents of tri(methoxysilyl)propyl methacrylate silane (MPTS) as a coupling agent and the effect of modified nanosilica on the abrasion resistance and thermal properties of acrylic emulsion resin. The infrared (IR) spectroscopy and thermo-gravimetric analysis (TGA) were used to evaluate the presence of MPTS on the surface of modified nanosilica. Grafting yield of MPTS on the surface of nanosilica was calculated from TGA diagrams. The obtained results showed that nanosilica was surface modified successfully by MPTS with a grafting yield of 47 % when using 3 wt.% of MPTS. After modification, the modified nanosilica became more hydrophobic and can disperse well in acrylic emulsion resin. The modified nanosilica improved significantly the abrasion resistance of acrylic coating as compared to neat acrylic resin and acrylic/unmodified silica nanocoating. The MPTS modified nanosilica has the potential to be applied as a reinforcing additive to acrylic emulsion resins to improve its abrasion resistance.

The Effect of Polyacrylate Emulsion Coating with Unmodified and Modified Nano-TiO2 on Weathering Resistance of Untreated and Heat-Treated Wood

“…It has been established that surface modification of TiO 2 with silica [ 17 , 18 ] or alumina (Al 2 O 3 ) [ 19 ] can suppress the photocatalytic property of TiO 2 . The surface modification of TiO 2 nanoparticles with silane coupling agents [ 12 , 20 , 21 , 22 , 23 , 24 ] and titanate coupling agents [ 25 ] was shown to improve the dispersibility of TiO 2 nanoparticles in an acrylic emulsion coating. Zeljko et al [ 26 ] investigated the effect of surface modification of TiO 2 on the properties of polyacrylate coatings for UV protection, comparing four different modifiers: nonionic emulsifier TX-100, the cationic initiator AIBA, the silane AMPTS, and the trisilanol POSS.…”

Assessment of influence of silane modified zirconia nanoparticle content on weather resistance of water-borne acrylic coating

“…Recently, nanocoatings based on polymer matrices and inorganic nanoparticles have garnered attention from scientists and producers due to their exceptional advantages, including high transparency, reflective index, hardness, elastic modulus, tensile strength, and thermal stability. Incorporating nano-additives such as zinc oxide [1], titanium oxide [2], graphene oxide [3], zirconium oxide [4,5], silica [6], etc., can significantly enhance the properties of coatings due to their high specific surface area [7]. Among these nanoscale additives, zirconium oxide (ZrO 2 ) nanoparticles exhibit excellent physical, chemical, and mechanical properties [8,9].…”

“…Water-borne acrylic resins possess excellent properties, such as high UV resistance, good weather stability, color stability, environmental friendliness, and low cost [2,6]. In our previous report, we found that ZrO 2 nanoparticles modified with 3-(trimethoxysilyl)propyl methacrylate silane positively influenced the abrasion resistance of acrylic emulsion coating [16].…”