Potassium diperiodatonickelate‐initiated graft copolymerization of methyl acrylate onto organophilic montmorillonite

Deng, Kuilin; Liu, Jing; Zheng, Xiaolong; Zhang, Yaqin; Jia, Ning; Tian, Huayu; Liu, Yinghai

doi:10.1002/pat.1076

Cited by 11 publications

(2 citation statements)

References 28 publications

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“…Peaks found at almost in the similar area suggest the major properties of pure Chitosan are retained even after the inclusion of ashes. Also, the intensity of the peak with pure Chitosan is reduced in both Carbon ash inclusion and Silica ash inclusion, showing the extensive coverage of the respective ashes 15 . Another conclusion can be derived by observing the crystallinity of the peaks that, the amorphous nature of the original pure Chitosan is not disturbed.…”

Section: 55mentioning

confidence: 98%

Chitosan and Reinforced Chitosan films for the Removal of Cr(VI) Heavy Metal from Synthetic Aqueous Solution

Srinivasan¹,

Pragathiswaran²,

Venkatesan³

et al. 2016

Orient. J. Chem

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Cr(VI) is removed efficiently from aqueous solution using Chitosan made films as the adsorbent. The efficiency of free Chitosan films is compared with the Chitosan-Silica and ChitosanCarbon, which are reinforced with biogenic Silica and Carbon obtained from Panicum miliare husk ashes, respectively. All the films were prepared by simple ageing method and swelling index was determined for all the three adsorbents independently. Adsorption studies of Cr(VI) heavy metal were carried out by varying pH, temperature, initial concentration of the adsorbate and quantity of adsorbent. On the otherhand, Cr(VI) was removed from the solution by Chitosan-Silica film better than free Chitosan and Chitosan-Carbon films. The optimum pH was found to be 3.0 and optimum temperature was 30°C. Thermodynamic, equilibrium and kinetic studies were carried out for all the three adsorbents, independently. Langmuir adsorption isotherm and Pseudo First Order kinetics were followed for the adsorption process. Concentration of metal ions was determined using a spectrophotometer. Oxidation states of the adsorbed Cr were determined by ESR. It was found that Chitosan-Silica film reduced Cr(VI) to Cr(III) almost completely in the aqueous solution.

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Section: 55mentioning

confidence: 98%

Chitosan and Reinforced Chitosan films for the Removal of Cr(VI) Heavy Metal from Synthetic Aqueous Solution

Srinivasan¹,

Pragathiswaran²,

Venkatesan³

et al. 2016

Orient. J. Chem

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“…The copolymerization was initiated by Ni (IV), which possesses higher initiate efficiency compared with ammonium persulfate (APS), potassium persulfate (PPS), 2, 2'-azobisisobutyronitrile (AIBN) [7]. In the previous study of our group, graft copolymers with high grafting efficiency and grafting percentage have been obtained by using Ni (IV) as an efficient initiator [8,9]. Moreover, the graft copolymerization is able to be carried out at a mild temperature of 35 ℃.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Properties of Chitosan Graft Copolymer Nanoparticles Using Potassium Diperiоdatоnickelate

Liu

Zhao

et al. 2014

AMR

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Nanoparticles comprising chitosan-graft-poly (methyl methacrylate) (CS-g-PMMA) copolymer were successfully synthesized in aqueous solution by using potassium diperiоdatоnickelate (Ni (IV)) as an initiator. The nanoparticles were characterized in terms of Fourier transform infrared (FTIR), dynamic light scattering (DLS) and transmission electron microscopy (TEM). The results indicated that chitosan was covalently linked to poly (methyl methacrylate) (PMMA) and the particles were uniform, spherical and well dispersed with narrow size distribution. Paclitaxel-loaded nanoparticles were prepared and in vitro release showed that these nanoparticles provided an initial burst release followed by a slowly sustained release for more than 16 days. Therefore, this process method would be used for synthesizing natural polymer graft copolymer nanoparticles with wide prospect.

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Using hydroxypropyl‐β‐cyclodextrin for the preparation of hydrophobic poly(ketoethyl methacrylate) in aqueous medium

Ding¹,

He²,

Deng³

2009

J of Applied Polymer Sci

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This work was committed to the polymerization of hydrophobic ketoethyl methacrylate monomer in aqueous medium in the presence of cyclodextrin, instead of polymerizing the monomer in toxic and volatile organic solvents. For this purpose, a new ketoethyl methacrylate monomer, p-methylphenacylmethacrylate (MPMA), was synthesized from the reaction of p-methylphenacylbromide with sodium methacrylate in the presence of triethylbenzylammonium chloride. The monomer was identified with FTIR, 1 H and 13 C-NMR spectroscopies. Hydroxypropyl-bcyclodextrin (HPCD) was used to form a water-soluble host/guest inclusion complex (MPMA/HPCD) with the hydrophobic monomer. The complex was identified with FTIR and NMR techniques and polymerized in aqueous medium using potassium persulfate as initiator. During polymerization the resulting hydrophobic methacrylate polymer precipitated out with a majority of HPCD left in solution and a minority of HPCD bonded on the resulting polymer. The thus-prepared polymer exhibited little difference from the counterparts obtained in organic solvent in number average molecular weight (M n ), polydispersity (M w /M n ) and yield. The investigation provides a novel strategy for preparing hydrophobic ketoethyl methacrylate polymer in aqueous medium by using a monomer/HPCD inclusion complex.

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Potassium diperiodatonickelate‐initiated graft copolymerization of methyl acrylate onto organophilic montmorillonite

Cited by 11 publications

References 28 publications

Chitosan and Reinforced Chitosan films for the Removal of Cr(VI) Heavy Metal from Synthetic Aqueous Solution

Chitosan and Reinforced Chitosan films for the Removal of Cr(VI) Heavy Metal from Synthetic Aqueous Solution

Preparation and Properties of Chitosan Graft Copolymer Nanoparticles Using Potassium Diperiоdatоnickelate

Using hydroxypropyl‐β‐cyclodextrin for the preparation of hydrophobic poly(ketoethyl methacrylate) in aqueous medium

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