Acrylate hybrid nanocomposite coatings based on SiO 2 nanoparticles by in-situ batch emulsion polymerization

Romo-Uribe, Ángel; Arcos-Casarrubias, Jose Antonio; Hernández-Vargas, Mireya Lizbeth; Reyes‐Mayer, Adriana; Aguilar-Franco, Manuel; Bagdhachi, Jamil

doi:10.1016/j.porgcoat.2016.04.013

Cited by 28 publications

(21 citation statements)

References 40 publications

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“…Nano‐TiO 2 was incorporated during the synthesis of the acrylic coatings following the procedure described in detail elsewhere, [ 26,27 ] see also Supporting Information. The copolymer composition was BA:MMA:AA 56:42:2.…”

Section: Methodsmentioning

confidence: 99%

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Dispersion at Single Unit TiO₂ Nanoparticles Reduced T_g, Induced Chain Disentanglement and Reduced Tensile Modulus in Waterborne Acrylic Coatings

Romo-Uribe

2020

Macro Materials & Eng

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Spatially distributed TiO2 nanoparticles induced an order of magnitude decrease of glass transition temperature, Tg, and chain disentanglement in waterborne acrylic coatings. Acrylic/TiO2 coatings are synthesized in situ by batch emulsion polymerization. The copolymer is based on butyl acrylate (BA), methyl methacrylate (MMA), and acrylic acid (AA) with composition 56:42:2 mol%, and nano‐TiO2 (ca. 12 nm) is incorporated up to 3 wt% content. Transmission electron microscopy (TEM) showed that TiO2 is dispersed at nearly single unit throughout the acrylic matrix. The nanoparticle reduced Tg and broadened the temperature range of the glass transition, δTg. The considerable increase of δTg suggests gradients of dynamics. Shear rheometry demonstrated that TiO2 induced chain disentanglement, the rubbery modulus Ge decreased two orders of magnitude with only 1 wt% TiO2 content thus increasing the packing length p (and the reptation tube diameter as dt = kp, k > 1). Consequently, the tensile Young's modulus E decreased an order of magnitude, relative to the neat copolymer. The reduction of Tg, the slowdown of macromolecular dynamics, the chain disentanglement and the increase of dt suggests dynamics modification due to intercalation of the entangled web by the TiO2 nanoparticles, and these results may be ascribed to a nanoconfinement effect.

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Section: Methodsmentioning

confidence: 99%

“…The conversion and coagulum percentage were determined by gravimetric techniques as described in detail in previous publications [ 26–29 ] and the results are summarized in Table 1 .…”

Section: Methodsmentioning

confidence: 99%

Dispersion at Single Unit TiO₂ Nanoparticles Reduced T_g, Induced Chain Disentanglement and Reduced Tensile Modulus in Waterborne Acrylic Coatings

Romo-Uribe

2020

Macro Materials & Eng

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“…However, the mechanical and thermal properties are related to the amount of added nanoparticles and to the type of polymerization process. Indeed, in some cases, the glass-transition temperature (T g ) and the elastic modulus increased with increasing silica content [32]. This behavior can be due to the reduction of polymer-chain mobility by the inclusion of rigid nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

“…Conversely, in other cases, high amounts of nanosilica reduced the T g and the temperature for maximum mechanical damping. Furthermore, high amount of silica nanoparticles lead to a more brittle behavior [32][33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

Waterborne Acrylate-Based Hybrid Coatings with Enhanced Resistance Properties on Stone Surfaces

et al. 2018

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Abstract:The application of coating polymers to building materials is a simple and cheap way to preserve and protect surfaces from weathering phenomena. Due to its environmentally friendly character, waterborne coating is the most popular type of coating, and improving its performance is an important key of research. The study presents the results regarding the mechanical and photo-oxidation resistance of some water-based acrylic coatings containing SiO 2 nanoparticles obtained by batch miniemulsion polymerization. Coating materials have been characterized in terms of hydrophobic/hydrophilic behavior, mechanical resistance and surface morphology by means of water-contact angle, and scrub resistance and atomic force microscopy (AFM) measurements depending on silica-nanoparticle content. Moreover, accelerated weathering tests were performed to estimate the photo-oxidation resistance of the coatings. The chemical and color changes were assessed by Fourier-transform infrared spectroscopy (FTIR) and colorimetric measurements. Furthermore, the nanofilled coatings were applied on two different calcareous lithotypes (Lecce stone and Carrara Marble). Its properties, such as capillary water absorption and color modification, before and after accelerated aging tests, were assessed. The properties acquired by the addition of silica nanoparticles in the acrylic matrix can ensure good protection against weathering of stone-based materials.

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“…Waterborne acrylate coatings have been developed since 1950s and rapidly in the early 1970s. On account of its excellent light fastness and outdoor aging resistance, waterborne acrylate coatings have become a kind of synthetic resin coating with the best application and comprehensive performance in the waterborne coatings system, which are widely used in furniture, metal, plastic, leather, paper, building, and textile finishing …”

Section: Introductionmentioning

confidence: 99%

Synthesis of stable high hydroxyl content self‐emulsifying waterborne polyacrylate emulsion

Zhang

Zhu

2017

J of Applied Polymer Sci

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The stability of hydroxyl polyacrylate emulsion was studied from two aspects of the structure of latex particles and polymerization conditions. Waterborne polyacrylate was prepared through seeded semicontinuous emulsion polymerization method with pre-emulsification process. HEMA was used to provide a high content of hydroxyl group, and the reactive emulsifier SE-10 was introduced to substitute for the traditional emulsifier. The best conditions including polymerization process and temperature, monomer types and dropping time were determined, and the effects of emulsifier content and addition method, HEMA content, chain transfer agent content, and soft/hard monomer ratio on the properties of emulsion were investigated. Through the optimization of polymerization conditions and the control of the structure of particles, we have successfully synthesized the core-shell structure of polyacrylate emulsion with a good appearance, low viscosity and a solid content of 46.5%. The hydroxyl polyacrylate exhibits good performance, which has great potential in development and application.

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Acrylate hybrid nanocomposite coatings based on SiO 2 nanoparticles by in-situ batch emulsion polymerization

Cited by 28 publications

References 40 publications

Dispersion at Single Unit TiO₂ Nanoparticles Reduced T_g, Induced Chain Disentanglement and Reduced Tensile Modulus in Waterborne Acrylic Coatings

Dispersion at Single Unit TiO₂ Nanoparticles Reduced T_g, Induced Chain Disentanglement and Reduced Tensile Modulus in Waterborne Acrylic Coatings

Waterborne Acrylate-Based Hybrid Coatings with Enhanced Resistance Properties on Stone Surfaces

Synthesis of stable high hydroxyl content self‐emulsifying waterborne polyacrylate emulsion

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Acrylate hybrid nanocomposite coatings based on SiO 2 nanoparticles by in-situ batch emulsion polymerization

Cited by 28 publications

References 40 publications

Dispersion at Single Unit TiO2 Nanoparticles Reduced Tg, Induced Chain Disentanglement and Reduced Tensile Modulus in Waterborne Acrylic Coatings

Dispersion at Single Unit TiO2 Nanoparticles Reduced Tg, Induced Chain Disentanglement and Reduced Tensile Modulus in Waterborne Acrylic Coatings

Waterborne Acrylate-Based Hybrid Coatings with Enhanced Resistance Properties on Stone Surfaces

Synthesis of stable high hydroxyl content self‐emulsifying waterborne polyacrylate emulsion

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Product

Resources

About

Dispersion at Single Unit TiO₂ Nanoparticles Reduced T_g, Induced Chain Disentanglement and Reduced Tensile Modulus in Waterborne Acrylic Coatings

Dispersion at Single Unit TiO₂ Nanoparticles Reduced T_g, Induced Chain Disentanglement and Reduced Tensile Modulus in Waterborne Acrylic Coatings