Synthesis of iron oxide/poly(methyl methacrylate) composite latex particles: Nucleation mechanism and morphology

Wang, Ping-Chieh; Chiu, Wen‐Yen; Lee, Chia‐Fen; Young, Tai‐Horng

doi:10.1002/pola.20335

Cited by 72 publications

(57 citation statements)

References 20 publications

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“…In recent years, core-shell hybrid composite materials derived from coating or templating colloidal particles, for instance, latex-silica, [1,2] latex-alumina, [3] latex-titania, [4] and latex-(iron oxide), [5] have been the subject of intense investigations because of the following merits: (1) The formation of shells on core particles could incorporate different compositions into the same structure and thus obtain hybrid, multifunctional colloidal particles; [6,7] (2) the properties of core-shell particles can be controlled by independently altering the composition, dimension, and structure of cores and shells; [8] (3) the core-shell particles can serve as the template to hollow inorganic particles that can be exploited to reduce the density of colloidal fillers and to save the use of precious materials by depositing them on inexpensive cores. [9] In all the core-shell hybrid composite materials reported, silica-based core-shell hybrids are the most popular studied since silica is the cheapest and its hybrids can be widely used in many industrial areas ranging from paints and drug delivery to composite materials.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Silica‐Coated Polystyrene Hybrid Spherical Colloids

Chen

Zhou

et al. 2005

Macro Chemistry & Physics

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Summary: A novel preparation method for stable PS/SiO2 core‐shell hybrid colloid was proposed. In this process, a positively charged PS colloid was first synthesized via surfactant‐free emulsion polymerization of styrene by using a cationic initiator, and the hydrolysis and condensation of tetraethoxysilane (TEOS) was then carried out in acidic aqueous ethanol medium in the presence of PS colloids. Silica layer was deposited onto the surface of PS particle via electrostatic interaction between positively charged PS colloids and negatively charged silica. No surface treatment and centrifugation/redispersion cycle process were needed. TEM, SEM, and zeta potential measurements indicated that silica layer was successfully coated onto the surfaces of PS colloids.

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Section: Introductionmentioning

confidence: 99%

Preparation of Silica‐Coated Polystyrene Hybrid Spherical Colloids

Chen

Zhou

et al. 2005

Macro Chemistry & Physics

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“…According to our previous work, 18 two nucleation mechanisms were proposed as given later to explain the particle growth and the morphology of Fe 3 O 4 / PMMA particles at different experimental conditions Mechanism I-seeded nucleation. Ferrofluid acted as seeds.…”

Section: Theoretical Treatmentmentioning

confidence: 99%

Synthesis of Fe₃O₄/PMMA composite latex particles: Kinetic modeling

Wang

Chiu

Young

2006

J of Applied Polymer Sci

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ABSTRACT:In this work, a generalized mathematical model was developed to estimate the variation of particle concentration during the entire course of soapless emulsion polymerization of methyl methacrylate with ferrofluid. Two mechanisms for the nucleation and growth of particles throughout the polymerization reaction were discussed: Mechanism I -seeded polymerization; and Mechanism IIself-nucleation polymerization. Here, the self-nucleation included homogeneous nucleation and micelle nucleation. Coagulation between particles, which came from different nucleation mechanisms during the course of polymerization, was considered and included in this model. When appropriate parameters were selected, this model could be successfully used to interpret the variation of particle concentration during the entire reaction. Under different conditions, rate of polymerization, number of radicals in each particle, average molecular weight of polymers, and rate constant of termination were also calculated. All of them explained the experimental results quite well.

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“…The results illustrate that the C C bonds on the ZrO 2 nanoparticle surface, introduced by Z-6030 modification, determine the site of MMA polymerization. With the increase of the MMA concentration, the adsorbed surfactant on surface of the core material is depleted by the excessive monomer, and the polymerization is mostly occurred in term of self-nucleation [27].…”

Section: Effect Of Monomer/zro 2 Mass Ratiomentioning

confidence: 99%