NDLI: Preparation of quaternized organic–inorganic hybrid brush polyphosphazene-co-poly[2-(dimethylamino)ethyl methacrylate] electrospun fibers and their antibacterial properties

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Back cover

Polymer Chemistry Vol - 3 Issue - 7

Polymer Chemistry Vol - 3 Issue - 6

Polymer Chemistry Vol - 3 Issue - 5

Polymer Chemistry Vol - 3 Issue - 4

Polymer Chemistry Vol - 3 Issue - 3

Polymer Chemistry Vol - 3 Issue - 2

Polymer Chemistry Vol -2

Polymer Chemistry Vol -1

Preparation of quaternized organic–inorganic hybrid brush polyphosphazene-co-poly[2-(dimethylamino)ethyl methacrylate] electrospun fibers and their antibacterial properties

Content Provider	Royal Society of Chemistry (RSC)
Author	Sen, Ayusman Zhang, Hua Allcock, Harry R. Liu, Xiao Tian, Zhicheng
Copyright Year	2012
Abstract	Densely grafted star- and comb-shaped molecular brushes composed of poly[2-(dimethylamino)ethyl methacrylate] were prepared via atom transfer radical polymerization (ATRP) using either cyclotriphosphazenes or polyphosphazenes as initiators. The grafting conditions were optimized in order to obtain well controlled brush structures. The kinetics of the reactions were first-order with respect to the monomer concentration in both cyclotriphosphazene and polyphosphazene systems. The resultant star- and comb-shaped brushes were quaternized with iodomethane, iodobutane, iodoheptane, iododecane and iodododecane, and the products were characterized by NMR, gel permeation chromatography (GPC) and differential scanning calorimetry (DSC). Electrospinning of the quaternized brushes gave rise to microfibers with diameters in range of 700 nm to 1.1 μm, evidenced by scanning electron microscopy (SEM). The antibacterial activity of the quaternized brush species in both aqueous solution and as fibrous solids against Escherichia coli (E. coli) has been evaluated. In aqueous solution, star-shaped brushes quaternized with iodoheptane showed the best antibacterial effect, with a minimum inhibitory concentration (MIC) as low as 250 μg mL−1. In the fibrous solid state, more than 99% of E. coli were killed within 2 h after contacting 100 mg of microfibers electrospun from the star-shaped brush polymers quaternized with either iododecane or iodododecane.
Starting Page	2082
Ending Page	2091
Page Count	10
File Format	HTM / HTML PDF
ISSN	17599954
Volume Number	3
Issue Number	8
Journal	Polymer Chemistry
DOI	10.1039/c2py20170d
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Atom-transfer radical-polymerization Methyl iodide Differential scanning calorimetry Escherichia coli coli Electrospinning Polymer brush Grafting Scanning electron microscope Gel permeation chromatography Polyphosphazene Micrometre Minimum inhibitory concentration Nuclear magnetic resonance Monomer
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Biochemistry Bioengineering Biomedical Engineering Polymers and Plastics

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