scholarly journals Preparation of Nanochitin/Polystyrene Composite Particles by Pickering Emulsion Polymerization Using Scaled-Down Chitin Nanofibers

Coatings ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 672
Author(s):  
Ryuta Watanabe ◽  
Kakeru Izaki ◽  
Kazuya Yamamoto ◽  
Jun-ichi Kadokawa
Keyword(s):  
Emulsion Polymerization ◽  
Nmr Spectra ◽  
Composite Particle ◽  
Aqueous Dispersion ◽  
Pickering Emulsion ◽  
Composite Particles ◽  
Aqueous Acetic Acid ◽  
Pickering Emulsions ◽  
Pickering Emulsion Polymerization ◽  
Chitin Nanofibers

In this study, we investigate the Pickering emulsion polymerization of styrene using scaled-down chitin nanofibers (SD-ChNFs) as stabilizers to produce nanochitin/polystyrene composite particles. Prior to emulsion polymerization, an SD-ChNF aqueous dispersion was prepared by disintegrating bundles of the parent ChNFs with an upper hierarchical scale in aqueous acetic acid through ultrasonication. After styrene was added to the resulting dispersions, the mixtures at the desired weight ratios (SD-ChNFs to styrene = 0.1:1–1.4:1) were ultrasonicated to produce Pickering emulsions. Radical polymerization was then conducted in the presence of potassium persulfate as an initiator in the resulting emulsions to fabricate the composite particles. The results show that their average diameters decreased to a minimum of 84 nm as the weight ratios of SD-ChNFs to styrene increased. The IR and 1H-NMR spectra of the composite particle supported the presence of both chitin and polystyrene in the material.

scholarly journals Silica-Supported Styrene-Co-Divinylbenzene Pickering Emulsion Polymerization: Tuning Surface Charge and Hydrophobicity by pH and Co-Aid Adsorption

Processes ◽  
2021 ◽  
Vol 9 (10) ◽  
pp. 1820
Author(s):  
Benoit Fouconnier ◽  
M. Ali Aboudzadeh ◽  
Francisco López-Serrano
Keyword(s):  
Emulsion Polymerization ◽  
Crosslinking Agent ◽  
Pickering Emulsion ◽  
Ammonium Persulfate ◽  
Continuous Phase ◽  
Pickering Emulsions ◽  
Hybrid Particles ◽  
Stabilizing Agents ◽  
Pickering Emulsion Polymerization ◽  
New Strategy

In this work, polymerizations of styrene (St) in the presence of divinylbenzene (DVB) as a crosslinking agent and sodium 4-vinylbenzenesulfonate (VBS) have been performed in Pickering emulsions, using silica nanoparticles (SNps) as stabilizing agents and ammonium persulfate as a hydrophilic initiator. In oil-in-water Pickering emulsions with alkaline continuous phase (pH = 9) at 1, 2, and 3 wt% DVB (relative to St), polydisperse spheroid copolymer submicronic nanoparticles were obtained. Comparatively, polymerizations performed in Pickering emulsions with acidic continuous phase (pH = 5) allowed preparing St-co-DVB microspheres with core–shell structures at 1 wt% DVB and St-co-DVB hybrid monoliths with bi-continuous morphologies at 2 and 3 wt% DVB. It is noteworthy that this work reports Pickering emulsion polymerization as a new strategy for preparing hybrid percolated scaffolds with bi-continuous porosity. The proposed mechanisms originated by pH, DVB, and VBS and the drastic impact caused on the final morphology obtained, either hybrid particles or monoliths, are discussed herein.

Core–Shell and Asymmetric Polystyrene–Gold Composite Particles via One-Step Pickering Emulsion Polymerization

Langmuir ◽  
2013 ◽  
Vol 30 (1) ◽  
pp. 75-82 ◽  
Author(s):  
Mingmeng Zhang ◽  
Thao H. Ngo ◽  
Noelle I. Rabiah ◽  
Todd P. Otanicar ◽  
Patrick E. Phelan ◽  
...  
Keyword(s):  
Emulsion Polymerization ◽  
Pickering Emulsion ◽  
Composite Particles ◽  
Core Shell ◽  
Pickering Emulsion Polymerization ◽  
One Step

Molecularly imprinted polymers fabricated by Pickering emulsion polymerization for the selective adsorption and separation of quercetin from Spina Gleditsiae

2019 ◽  
Vol 43 (37) ◽  
pp. 14747-14755 ◽  
Author(s):  
Yanhua Sun ◽  
Yange Zhang ◽  
Zhiyu Ju ◽  
Liangfeng Niu ◽  
Zhaoxiang Gong ◽  
...  
Keyword(s):  
Emulsion Polymerization ◽  
Molecularly Imprinted Polymers ◽  
Selective Adsorption ◽  
Pickering Emulsion ◽  
Pickering Emulsions ◽  
Molecularly Imprinted ◽  
Imprinted Polymers ◽  
Pickering Emulsion Polymerization

Hydroxyapatite-stabilized Pickering emulsions and their application in the extraction of quercetin.

Pickering emulsion polymerized smart magnetic poly(methyl methacrylate)/Fe2O3 composite particles and their stimulus-response

RSC Advances ◽  
2015 ◽  
Vol 5 (29) ◽  
pp. 23094-23100 ◽  
Author(s):  
Woo Jin Ahn ◽  
Hyo Seung Jung ◽  
Hyoung Jin Choi
Keyword(s):  
Iron Oxide ◽  
Methyl Methacrylate ◽  
Emulsion Polymerization ◽  
Magnetic Particles ◽  
Pickering Emulsion ◽  
Composite Particles ◽  
Smart Polymer ◽  
Stimulus Response ◽  
Pickering Emulsion Polymerization ◽  
Inorganic Composite

Smart polymer/inorganic composite magnetic particles were synthesized by Pickering emulsion polymerization using magnetic iron oxide (Fe2O3) particles as a solid stabilizer.

scholarly journals Access to tough and transparent nanocomposites via Pickering emulsion polymerization using biocatalytic hybrid lignin nanoparticles as functional surfactants

2021 ◽  
Vol 23 (8) ◽  
pp. 3001-3014
Author(s):  
Adrian Moreno ◽  
Mohammad Morsali ◽  
Jinrong Liu ◽  
Mika H. Sipponen
Keyword(s):  
Antioxidant Activity ◽  
Green Synthesis ◽  
Glucose Oxidase ◽  
Emulsion Polymerization ◽  
Pickering Emulsion ◽  
Pickering Emulsions ◽  
Vinyl Polymers ◽  
Pickering Emulsion Polymerization ◽  
Green Route ◽  
Functional Surfactants

Coating of lignin nanoparticles with chitosan and glucose oxidase allows for the green synthesis of acrylic and vinyl polymers in Pickering emulsions. The resulting dispersions offer a green route to tough composites equipped with antioxidant activity.

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