Silicone-containing aqueous polymer dispersions with hybrid particle structure

Kozakiewicz, Janusz; Ofat, Izabela; Trzaskowska, Joanna

doi:10.1016/j.cis.2015.04.002

Cited by 42 publications

(42 citation statements)

References 223 publications

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“…8) of PDMS shift to outer (hydrophile, surfactant layer) and inner (hydrophobe) part of micelles respectively) [35,62]. This effect has been reported in the literature [76]. It can be concluded that in the presence of PDMS bulk polymerization in micro-reactors may convert to more homogeneous system in the emulsion polymerization.…”

Section: Effect Of Pdms Surfactant On the Particle Morphologysupporting

confidence: 65%

“…This behavior could be the result of a reduction in the polymer (core)/polymer (shell) interfacial tension and overall free energy of the system by PDMS surfactant. Furthermore, PDMS as a lipophilic surfactant can solubilize many organic monomers into the interior of the micelles and can create a homogeneity environment for the polymerization [62,75,76]. This fact is attributed to the coiling of the long lipophilic chain in order to reduce the entropy loss (due to the molar mass distribution of PDMS used, it is well known that many properties of polymers strongly depend on their average molecular weight, particularly below 10 4 g mol -1 , because of the strong influence of oligomer chain ends.…”

Section: Effect Of Pdms Surfactant On the Particle Morphologymentioning

confidence: 99%

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Novel Synthesis Method and Characterization of Poly(vinyl acetate‐butyl acrylate) Latex Particles: Effect of Silanol‐Terminated Poly(dimethylsiloxane) Surfactant on the Seeded Emulsion Copolymerization

Ghorbani

Zohuri

Gholami³

2017

J Surfact & Detergents

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In a conventional semi‐batch seeded emulsion copolymerization of vinyl acetate/butyl acrylate (VA/BA) using hybrid surfactants namely, dioctyl sulfosuccinate (DOSS) as an anionic surfactant, nonylphenol ethoxylate (KENON 30) as a non‐ionic type, and polydimethylsiloxane surfactant (having hydrophilic silanol‐terminated, called PDMS). The effect of PDMS on the properties of the latex synthesized was investigated by measuring solid content, viscosity, colloidal stability, particle size distributions of the base latex, viscosity average molecular weight (M¯v) of the copolymer, latex particle morphology, glass transition temperature (Tg) of a copolymer and thermal gravimetric analysis (TGA). Particle size of the base latex decreases (Z‐average from 246.48 to 143.69 nm) upon increasing the amount of PDMS surfactant in the recipe (up to 6 wt%). The presence of PDMS surfactant in the hybrid surfactants led to a significant increase in the solid content (from 48.71 to 51.31 wt%), viscosity (from 334 to 806 centipoise, cp) and M¯v (from 1.91 × 105 to 2.34 × 105 g mol−1). Thermal stability and Tg of the copolymer were increased with addition of PDMS surfactant (thermal stability from 344.77 to 389.81 °C and Tg from −20.7 to 21.7 °C). The colloidal stability evaluated using the electrolyte addition method was improved with addition of PDMS surfactant. The uniform morphological structure of the final particle is the main effect of using PDMS in the hybrid surfactants.

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Section: Effect Of Pdms Surfactant On the Particle Morphologysupporting

confidence: 65%

Section: Effect Of Pdms Surfactant On the Particle Morphologymentioning

confidence: 99%

Novel Synthesis Method and Characterization of Poly(vinyl acetate‐butyl acrylate) Latex Particles: Effect of Silanol‐Terminated Poly(dimethylsiloxane) Surfactant on the Seeded Emulsion Copolymerization

Ghorbani

Zohuri

Gholami³

2017

J Surfact & Detergents

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“…The peak at stage 3 was due to the thermal degradation of protein . After the incorporation of the OACL emulsion, a new peak occurred at stage 4 because of the introduction of high‐energy SiO bonds (550 kJ/mol) . The SiO bonds dramatically increased RW 4% to 40.1%; this indicated that these bonds were very stable.…”

Section: Resultsmentioning

confidence: 99%

“…Core–shell characteristics are generally considered the predominant features of hybrid APDs . Particles with more reactive vertex groups act as an interfacial interface with multiple physicochemical crosslinkers .…”

Section: Introductionmentioning

confidence: 99%

High bonding strength and boiling water resistance of soy protein‐based adhesives via organosilicon–acrylate microemulsion and epoxy synergistic interfacial enhancement

Zhao

Xing

Wang

et al. 2017

J of Applied Polymer Sci

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Boiling water resistance, an important indicator of wood adhesives, represents the capability of adhesives for exterior woodwork applications. However, soy-based adhesives show poor behaviors in this respect, which limit their applications in outdoor environments. In this article, we report a synergistic modification method of integrating a cocrosslinking system of epoxied polyamideamine-epichlorohydrin (PAE) and organosilicon-acrylate copolymer latexes (OACLs) to improve soybean meal (SM)-based adhesive properties. Tailored PAE and OACL SM-based adhesives demonstrated robust crosslinking structures via multi-interfacial interactions, where PAE and OACL served as building blocks of an interpenetrating network, which was characterized by Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis, and scanning electron microscopy. The dry-shear strength, wet-shear strength, and boiling water strength of the resulting SM-based adhesives were 1.41 6 0.13, 1.32 6 0.17, and 1.20 6 0.11 MPa, respectively, with 15 wt % OACL loading; these were 41, 45, and 90% increases, respectively, over the SM-PAE adhesive with which we compared them. Most importantly, the excellent boiling water resistance of the adhesives make them practical for exterior plywood.Crosslinking is a particularly effective approach for enhancing adhesion properties. Currently, aldehydes, epoxy compounds, natural gellan, and genipin are the most commonly used crosslinkers to form intrapenetrating or interpenetrating networks with a soy-protein matrix. 3,4,17 When the crosslinked adhesive is used under humid conditions, the uniform and tough network limits the permeation of water molecules and, thus, improves the adhesion performance. For example, Li and coworkers 18,19 designed a series of soy protein-based adhesives consisting of a covalently crosslinked polyamideamine-epichlorohydrin (PAE) network and a physically crosslinked attapulgite or carboxylated styrene-butadiene rubber latex network between soy-protein matrixes. The boiling water strength of these adhesives ranged V C 2017 Wiley Periodicals, Inc.

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“…To the best our knowledge, most research in this area discusses the preparation of silicone oil (linear silicone). On the other hand, few reports are available on the preparation of cross‐linked silicone particles (silicone rubber) in an aqueous medium, in which core‐shell particles comprising a silicone core are prepared because the silicone core cannot be maintained in a particulate state . Zhang et al reported polysiloxane/poly (butyl acrylate) composite particles by seeded emulsion polymerization of butyl acrylate in the presence of cross‐linked polysiloxane using 60 Co gamma rays .…”

Section: Introductionmentioning

confidence: 99%

Preparation of free‐standing silicone particles in aqueous heterogeneous system

Mitsui

Mukai

Ikubo

et al. 2019

Polymers for Advanced Techs

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To prepare cross-linked silicone (silicone rubber) particles in an aqueous medium, we investigated two synthesis methods involving a miniemulsion system. The first method was based on cationic ring-opening polymerization of cyclic siloxane, which is a common synthetic route for linear silicone oil and uses octamethylcyclotetrasiloxane (D 4 ) as the monomer and dimeric D 4 (bis-D 4 ) as the cross-linker. Although this method produces silicone particles, the particles do not remain in the particulate state after drying because of low cross-linking density. The polymerization mechanism of this method was also investigated, which proceeds under the ring-opening reaction of D 4 in monomer droplets and upon polycondensation of hydrolyzed D 4 , which occurs in the water phase (ie, outside the monomer droplets). This mechanism implied that introducing the cross-linking structure into particles is difficult because of the low solubility of bis-D 4 in water. To overcome these difficulties, we demonstrated a second method of preparing silicone particles based on the thiol-Michael addition reaction between thiolterminated silicone oil and triacrylate in miniemulsion systems. Transmission electron microscopy images indicated that the silicone particles obtained in the particulate state upon drying and the aggregates of these particles showed elasticity.

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Silicone-containing aqueous polymer dispersions with hybrid particle structure

Cited by 42 publications

References 223 publications

Novel Synthesis Method and Characterization of Poly(vinyl acetate‐butyl acrylate) Latex Particles: Effect of Silanol‐Terminated Poly(dimethylsiloxane) Surfactant on the Seeded Emulsion Copolymerization

Novel Synthesis Method and Characterization of Poly(vinyl acetate‐butyl acrylate) Latex Particles: Effect of Silanol‐Terminated Poly(dimethylsiloxane) Surfactant on the Seeded Emulsion Copolymerization

High bonding strength and boiling water resistance of soy protein‐based adhesives via organosilicon–acrylate microemulsion and epoxy synergistic interfacial enhancement

Preparation of free‐standing silicone particles in aqueous heterogeneous system

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