Preparation of poly(acrylamide)/nanoclay organic-inorganic hybrid nanoparticles with average size of ∼250 nm via inverse Pickering emulsion polymerization

Abdolbaghi, Samira; Pourmahdian, Saeed; Saadat, Younes

doi:10.1007/s00396-013-3158-8

Cited by 21 publications

(14 citation statements)

References 18 publications

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“…Generally, nanoparticle serves as an effective modifier to toughen plastics and rubber [ 30 , 31 , 32 , 33 , 34 ]. At present, plenty of researchers have fostered the hydrogels by employing nanoparticles as innovative physical cross-linkers [ 35 , 36 , 37 , 38 , 39 , 40 , 41 ]. Sun et al [ 42 ] developed a novel nanocomposite (NC) hydrogel based on nanocrystals with a fracture stress of 229 KPa.…”

Section: Introductionmentioning

confidence: 99%

Tuning Physical Crosslinks in Hybrid Hydrogels for Network Structure Analysis and Mechanical Reinforcement

Liu

Shao

2019

Polymers

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Hydrogels with high mechanical strength are needed for a variety of industrial applications. Here, a series of hydrogels was prepared by introducing hybrid particles as hydrophobic association points to toughen the hydrogels. These toughened hydrogels were able to transfer an external mechanical force via the reorganization of the crosslinking networks. They exhibited an extraordinary mechanical performance, which was the result of the coordination between hydrophobic segments and hybrid particles. Herein, the connection between the dissipated energy of the inner distribution structure (on a small scale) and the mechanical properties (on a large scale) was conducted. Specifically, we inspected hydrogels of latex particles (LPs) with different chain lengths (C4, C12, C18) and studied their inner structural parameters, namely, the relationship between the density and molecular weight of crosslinking points to the mechanical strength and energy dissipation. Favorable traits of the hydrogels included compact internal structures that were basically free from defects and external structures with puncture resistance, high toughness, etc. Based on the experimental results that agreed with the theoretical results, this study provides a profound understanding of the internal structure of hydrogels, and it offers a new idea for the design of high-strength hybrid hydrogels.

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Section: Introductionmentioning

confidence: 99%

Tuning Physical Crosslinks in Hybrid Hydrogels for Network Structure Analysis and Mechanical Reinforcement

Liu

Shao

2019

Polymers

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“…The polymerization should be related to their surfa-ce area. Ayat et al obtained similar results [36].…”

Section: Resultsmentioning

confidence: 56%

Structural Investigation: Anionic Polymerization of Acrylamide under Microwave Irradiation using Maghnite-Na+ Clay (Algerien MMT) as Initiator

Rahmouni

Belbachir

Ayat

2017

Bull. Chem. React. Eng. Catal.

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Intercalation of acrylamide into interlayer spaces of natural montmorillonite called maghnite (Algerian MMT) by the free solvent polymerization technique under micowave irradiation was studied. The transformation was carried out with using both the raw (Maghnite-Na fin) and treated clay (Maghnite-Na+ fin) in aqueous sodium hydroxide NaOH solution (1 M). It was shown that no initial modification of the layered mineral (by ion-exchange with Na+ cations or organophilization) is needed for the successful introduction of anionic hydrogels into the interlayer gallery. The goal of the present study was to synthesis anionic polyacrylamide/Maghnite composite with similar composition and structure to that synthesized of other catalyst. The Maghnite catalyst has a significant role in the industrial scale. In fact, the use of Maghnite is preferred for its many advantages: a very low purchase price compared to other catalysts, the easy removal of the reaction mixture. The anionic sodium-clay polyacrylamide material exhibited a tendency to the formation of exfoliated structure. The synthesized hydrogels, as monitored by the swelling behavior, were characterized by Fourier transform infrared and 1HNMR analysis. Copyright © 2018 BCREC Group. All rights reservedReceived: 24th June 2017; Revised: 13rd December 2017; Accepted: 14th December 2017; Available online: 11st June 2018; Published regularly: 1st August 2018How to Cite: Rahmouni, R., Belbachir, M., Ayat, M. (2018). Structural Investigation: Anionic Polymerization of Acrylamide under Microwave Irradiation using Maghnite-Na+ Clay (Algerien MMT) as Initiator. Bulletin of Chemical Reaction Engineering & Catalysis, 13 (2): 262-274 (doi:10.9767/bcrec.13.2.1308.262-274)

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“…The particle size and its distribution are important factors in evaluating stability of polymer emulsions and dispersions . Distribution curves of the dispersions stabilized with different HEOs are shown in Figure with corresponding average particle sizes, particle size distribution indexes and storage stabilities listed in Table .…”

Section: Resultsmentioning

confidence: 99%

“…The particle size and its distribution are important factors in evaluating stability of polymer emulsions and dispersions. 18 Distribution curves of the dispersions stabilized with different HEOs are shown in Figure 2 with corresponding average particle sizes, particle size distribution indexes and storage stabilities listed in Table II. It is obvious that a higher epoxide/hydroxyl molar ratio led to a smaller particle size and a wider particle size distribution for both HEO-244 and HEO-251, because oligomers with higher epoxide/hydroxyl molar ratios had lower PEG content, which were not hydrophilic enough to provide sufficient stabilizing effect in waterborne epoxy dispersions.…”

Section: Storage Stability Of Waterborne Epoxy Dispersionsmentioning

confidence: 99%

Preparation and properties of few‐layer graphene modified waterborne epoxy coatings

Yuan

Zhao

Sun

et al. 2018

J of Applied Polymer Sci

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Few layer graphene (FLG) has been used to improve different properties of polymers. FLG‐modified waterborne epoxy dispersions were prepared using a hydrophilic epoxy oligomer (HEO‐144) as the surfactant, which was prepared using liquid epoxy resin and poly(ethylene glycol) (PEG4000) at a molar ratio of 1.0. To enhance the stability of FLG‐modified waterborne epoxy dispersions, fumed silica was added and best stability was reached at a fumed silica content of 1.5%. Thermogravimetric analyses demonstrated enhanced thermal stability of the epoxy films after FLG modification. With FLG content of 1.0%, T5% of the modified epoxy films has been increased to 332 °C from 275 °C. Water contact angle and adsorption tests showed improved water resistance with FLG, the water contact angle increased from 49.5° to 76.2° and water adsorption decreased from 9.0% to 2.0%. Furthermore, electrochemical impedance spectroscopy tests and tafel analysis indicated that FLG greatly improved the anticorrosion performance of waterborne epoxy coatings. With a FLG content of 1.0%, modified waterborne epoxy coatings demonstrated significantly low corrosion rate, which was one eighth of that of the unmodified control. These results indicate that FLG modification can be an effective and low cost approach to enhance the anticorrosion performance of waterborne epoxy coatings. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46743.

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Preparation of poly(acrylamide)/nanoclay organic-inorganic hybrid nanoparticles with average size of ∼250 nm via inverse Pickering emulsion polymerization

Cited by 21 publications

References 18 publications

Tuning Physical Crosslinks in Hybrid Hydrogels for Network Structure Analysis and Mechanical Reinforcement

Tuning Physical Crosslinks in Hybrid Hydrogels for Network Structure Analysis and Mechanical Reinforcement

Structural Investigation: Anionic Polymerization of Acrylamide under Microwave Irradiation using Maghnite-Na+ Clay (Algerien MMT) as Initiator

Preparation and properties of few‐layer graphene modified waterborne epoxy coatings

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