Study on the preparation of PAM/MMT W/W emulsion and its application as a flocculant

Qiu, Jinghong; Wang, Hui; Dong, Shihua; Wang, Haibo; Cheng, Xu; Du, Zongliang

doi:10.1039/c5ra25546e

Cited by 4 publications

(2 citation statements)

References 28 publications

(27 reference statements)

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“…26,27 Recently, as a promising intermediate in developing novel halogen-free ame retardants, 9,10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide (DOPO) have been frequently used to synthesize effective and efficient phosphaphenanthrene-containing ame retardant additives for various polymer materials. [28][29][30][31][32][33] And some similar works have also suggested that the addition of phosphaphenanthrenecontaining additive indeed improved the ame retardancy of PC materials effectively. 34 Hence, the research on the phosphaphenanthrene-containing compound ame retarding PC materials is worth further exploring and investigating.…”

Section: Introductionmentioning

confidence: 99%

Gaseous-phase flame retardant behavior of a multi-phosphaphenanthrene compound in a polycarbonate composite

et al. 2017

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A multi-phosphaphenanthrene compound (TDBA) was incorporated into polycarbonate (PC) to prepare a flame retardant composite. TDBA improved the flame retardancy of the PC material effectively. The PC composite comprising 10 wt% TDBA passed the UL94 V-0 level with a LOI value of 33.7%. The incorporation of TDBA effectively inhibited the combustion intensity of the TDBA/PC composite via reducing the production of flammable methane and carbonyl-containing substances, suppressing the oxidative process of combustible pyrolysis products, and promoting the PC matrix to form large-scale smoke particles. All these were caused by releasing phosphaphenanthrene fragments, PO, and phenoxyl free radicals from pyrolyzed TDBA. As an additive-type flame retardant with multiple phosphaphenanthrene groups, TDBA was verified to exert its effect mainly in the gaseous phase during flame retarding of PC materials.

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Section: Introductionmentioning

confidence: 99%

Gaseous-phase flame retardant behavior of a multi-phosphaphenanthrene compound in a polycarbonate composite

et al. 2017

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“…Actually, gelatin has been widely and successfully applied in the wastewater process as a basic material but not as a stabilizer . In our previous study, gelatin was used to prepare a PAM W/W emulsion in an ammonium sulfate–water system. Because of the negative influence from inorganic salt, it is of great significance to prepare PAM with only gelatin as the stabilizer through a polymer–water system.…”

Section: Introductionmentioning

confidence: 99%

Preparation of polyacrylamide via dispersion polymerization with gelatin as a stabilizer and its synergistic effect on organic dye flocculation

Qiu

Wang

et al. 2018

J of Applied Polymer Sci

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In this study, we successfully prepared a polyacrylamide (PAM) water-in-water (W/W) emulsion through dispersion polymerization with only a small concentration of gelatin as the stabilizer. Types of identical methods were used to study the structure of this material, among which Fourier transform infrared and 1 H-NMR spectroscopy indicated that the polymer was composed of PAM and a few gelatin, transmission electron microscopy (TEM) verified the W/W emulsion structure, and gel permeation chromatography confirmed the existence of the graft polymer of gelatin and PAM. In addition, TEM and dynamic light scattering confirmed the morphology and particle size distribution of the PAM W/W emulsion particles and demonstrated that the formation mechanism of the particles during the polymerization process was quite fitted with phase-separation theory. The effects of the temperature, pH value, and gelatin concentration on the properties of the PAM W/W emulsion were also investigated systematically. Moreover, PAM W/W emulsions prepared with various gelatin concentrations were applied to the flocculation of Reactive Turquoise Blue K-GL; it turned out that the PAM W/W emulsion had a higher removal efficiency with increasing gelatin concentration. Therefore, the PAM W/W emulsion could be regarded as an effective flocculant for wastewater treatment; it also showed an excellent redispersion ability in water and good storage stability.

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Synthesis of montmorillonite-based tris(2-ethylamine)-Schiff-base composites with remarkable antibacterial activity

Kenawy

Berber

Saad‐Allah

et al. 2020

Journal of Saudi Chemical Society

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Study on the preparation of PAM/MMT W/W emulsion and its application as a flocculant

Abstract: OMMT was first prepared by intercalation of AM into MMT, then the OMMT was added into the dispersion polymerization system of polyacrylamide/montmorillonite water in water (WPAMt) emulsion and gelatin was used as the stabilizer.

Cited by 4 publications

References 28 publications

Gaseous-phase flame retardant behavior of a multi-phosphaphenanthrene compound in a polycarbonate composite

Gaseous-phase flame retardant behavior of a multi-phosphaphenanthrene compound in a polycarbonate composite

Preparation of polyacrylamide via dispersion polymerization with gelatin as a stabilizer and its synergistic effect on organic dye flocculation

Synthesis of montmorillonite-based tris(2-ethylamine)-Schiff-base composites with remarkable antibacterial activity

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