Preparation and characterization of inorganic–organic trilayer core–shell polysilsesquioxane/polyacrylate/polydimethylsiloxane hybrid latex particles

Poly(siloxane-ether-urethane)-acrylic (PU-AC) hybrid emulsions were prepared by introducing different hydroxyethoxypropyl-terminated polydimethylsiloxane (PDMS) content into the acrylic-terminated poly(ether-urethane) backbone and then in situ copolymerizing with methyl methacrylate and butyl acrylate via emulsion process. The effects of PDMS on the particle size and viscoelastic behavior of the hybrid emulsions were investigated. Meanwhile, the hydrogen bonding, mechanical and thermal mechanical properties, water resistance, the surface gloss, and wettability of the resultant hybrid films were also studied. The results showed that all the hybrid emulsions showed shear-thinning behaviors, and the introduction of PDMS resulted in the formation of the hybrid emulsions with increased average particle size and decreased viscosity. The chemical bonds built between PU and AC yielded higher than 73% crosslinking fraction in all the hybrid materials, but this value decreased with increasing PDMS content because PDMS reduced the hydrogen bonding interactions and enhanced the phase separation. As a result, an increase in the PDMS content led to an increase in the elongation, water resistance, surface roughness, and water hydrophobic of the films, but the tensile strength, hardness, storage modulus, and glass transitions temperature decreased. It is suggested that introduction of PDMS can provide the hybrid materials with the improved flexibility, water resistance, and surface hydrophobicity, which has potential application value in the fouling-release coatings, biomaterials, and surface fishing.

Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Preparation and properties of poly(siloxane‐ether‐urethane)‐acrylic hybrid emulsions

Tang¹,

Ma²,

Hou³

et al. 2017

“…23,24 In the last decade, there have been increasing studies focusing on synthesis PDMS/polyacrylate nanocomposite particles. [25][26][27] In this article, a series of poly (MMA-co-BA)/silica particles have been synthesized by aqueous emulsion copolymerization in the presence of a glycerol-functionalized nano silica sol which was modified with different amount of D 4 . The effect of addition method and the amount of D 4 added on the structure of the nanocomposite particles and the properties of the film formed by these nanocomposite particles are investigated.…”

Section: Introductionmentioning

confidence: 99%

The effect of octamethylcyclotetrasiloxane (D₄) addition on the structure and properties of film‐forming polyacrylate/silica core–shell composite particles

Yuan

Qian

2015

The film-forming polyacrylate/silica core-shell nanocomposite particles with octamethylcyclotetrasiloxane (D 4 ) were successfully synthesized via aqueous emulsion polymerization in the presence of a glycerol-functionalized nano silica sol. The ringopening polymerization of D 4 and the reaction with the glycerol-functionalized nano silica particles before emulsion polymerization was the key procedure in this process. Transmission electron microscopy results showed that more nano silica particles tended to coat on the polyacrylate particles surface after the nano silica sols were modified with D 4 . The silica aggregation efficiency was increased from 90.9 to 98.6% when the amount of D 4 used in the system was varied from 0 to 8.0 wt %. The transparency of the nanocomposite films was not compromised after D 4 was incorporated into the system. The films of the nanocomposite particles with or without D 4 both exhibited superior abrasive resistance. Furthermore, the water resistance and hydrophobicity of the films of these particles with D 4 were also improved significantly.

“…In addition, by means of the hydrolysis‐condensation of trifunctional monomers, PSQ can be simply fabricated in organic systems, aqueous solutions, and even their bilayer systems too. Thus, there have been many works studying the chemistry and physics of the preparation of PSQ‐based hybrid materials in recent years.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of trilayer core–shell polysilsesquioxane–fluoroacrylate copolymer composite emulsion particles

Wang

Hao

et al. 2017

Polysilsesquioxane-fluoroacrylate copolymer [poly(methyl methacrylate)-butyl acrylate-dodecafluoroheptyl methacrylate)] (FPSQ) composite latex particles with a trilayer core-shell morphology were manufactured by seeded emulsion polymerization, where PSQ latex particles bearing reactive methacryloxypropyl moieties were first produced by the hydrolysis-condensation of (3-methacryloxypropyl)trimethoxysilane, and then they were utilized as seeds, with methyl methacrylate, butyl acrylate, and dodecafluoroheptyl methacrylate as the inner and outer shell monomers. Fourier-transform infrared spectra and 1 H-NMR confirm the structure of the FPSQs. Transmission electron microscopy and scanning electron microscopy demonstrate that the obtained composite emulsion particles emerge with the trilayer core-shell pattern. Due to the anchoring of PSQ nanoparticles, the thermal stabilities of the FPSQ films are strengthened, and the resistance to heat is gradually improved along with the increase of the fluoroacrylate dose in the polymer matrix composite. X-ray photoelectron spectroscopy, atomic force microscopy (AFM), and hydrophobicity investigations indicate that the fluorinated chain segments tend to concentrate at the film-air two-phase interface. In addition, the AFM result denotes that importing more fluorine into the FPSQ hybrid material will engender greater phase separation and enrichment of the fluoroalkyl segments and a rougher morphology. Thus, the water contact angle of the FPSQ film can ultimately reach 121.48. V C 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44845.