Surface modification of polypropylene microfiltration membranes by graft polymerization of N-vinyl-2-pyrrolidone

Liu, Zhen-Mei; Xu, Zhi‐Kang; Wang, Jian-Qin; Wu, Jian; Fu, Junjie

doi:10.1016/j.eurpolymj.2004.05.020

Cited by 117 publications

(35 citation statements)

References 29 publications

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“…Electrospun polyethylene terephthalate (PET) nanofibers were modified with poly (methacrylic acid) by graft polymerization in a mild condition without any structural changes in the bulk phase [80]. Electrospun polyurethane (PU) nanofibers were modified with poly(4-vinyl-N-hexyl pyridinium bromide) on the surface for antibacterial applications [81].…”

Section: Biocompatibility Of Nanofibersmentioning

confidence: 99%

Nanofibers‐based Biomedical Devices

Mondal

Tiwari

2012

Intelligent Nanomaterials

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Polymer fibers have been employed in many biomedical applications -for example, sutures, tissue engineering matrices, gauzes and bandages, and drug delivery devices. These are made of either non-biodegradable polymers or biodegradable polymers, such as poly (lactide-co-glycolide). Nanofiber-based materials have several advantages compared to conventional fibers. In particular, they represent a very large surface area to volume ratio, high porosity, and variable pore-size distribution. Additionally, the surface functionality is possible to influence, and various morphologies are achievable, including nanotubes. Recently, electrospun nanofiber matrices have garnered a lot of attention and shown great potential in biomedical applications. The three-dimensional synthetic biodegradable scaffolds are designed utilizing nanofibers to serve as an excellent framework for cell adhesion, proliferation, and differentiation. Physiochemical properties of nanofiber scaffolds can be governed by manipulating electrospinning parameters to meet the demands of a specific applications. Various attempts have been made to modify nanofiber surfaces with several bioactive molecules to allow cells with the requisite chemical cues and a more in vivo -like environment. Nanofibers have been used as scaffolds for skin tissue engineering, musculoskeletal tissue engineering (bone, cartilage, ligament, and skeletal muscle), vascular tissue engineering, neural tissue engineering, and as carriers for the controlled

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Section: Biocompatibility Of Nanofibersmentioning

confidence: 99%

Nanofibers‐based Biomedical Devices

Mondal

Tiwari

2012

Intelligent Nanomaterials

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“…It may be two dimensional or three dimensional. The introduction of different moieties through grafting techniques features different morphologies, e.g., grafting with polyvinyl pyrrolidone on to the polypropylene [20] , polyacrylic acid grafting on polyamide (NF -270) membrane [21] , or methyl methacylate over the ultrahigh molecular weight of polyethylene [22] . The white layer of polyvinyl pyrrolidone spreads with the grafting (Figure 4.15 ), with the bumpy structure appearance of methyl methacrylate over the ultra high molecular weight of polyethylene (Figure 4.16 ).…”

Section: By Morphological Analysismentioning

confidence: 99%

“…20 ). The common techniques are the sessile drop, the pendant drop, or the Wilhelmy technique.The sessile drop method uses an optical subsystem to capture the profi le of a pure liquid on a solid substrate.…”

mentioning

confidence: 99%

Analytical Evidence

and

Ray

2008

Polymer Grafting and Crosslinking

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“…N-vinyl-2-pyrrolidone (N-VP) is a hydrophilic and nonionic monomer, the polymerization of which is easily initiated through radicals [17]. Poly(N-vinyl-2-pyrrolidone) (PVP) is a polymer with great potential applications in different biomedicines.…”

Section: Introductionmentioning

confidence: 99%

Immobilization of Saccharomyces cerevisiae on to modified carboxymethylcellulose for production of ethanol

Gökgöz

Yi̇ği̇toğlu

2011

Bioprocess Biosyst Eng

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In this work, modified carboxymethylcellulose (CMC) was used as a new support material for production of ethanol. Crosslinked graft copolymers of CMC with N-vinyl-2-pyrrolidone (N-VP) were prepared in different grafting yields. The beads material was characterized by means of fourier transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), scanning electron microscope (SEM) and swelling experiment. Saccharomyces cerevisiae was immobilized using entrapment method in the graft copolymers of carboxymethylcellulose-g-poly(N-vinyl-2-pyrrolidone) (CMC-g-PVP) for ethanol fermentation. The effects of grafting yield, initial glucose concentration and crosslinker concentration on the yield of ethanol process were investigated. Reusability of the immobilized yeasts was investigated and found that the materials can be used four times without losing their activity. Ethanol production increased to 59.3 g/L from 46.4 g/L when percentage of N-VP in the graft copolymer was increased. The highest ethanol productivity was found to be 1.75-2.25 g/L h. Fermentation time decreased with the decreasing of crosslinker concentration. The results suggest that the proposed method for immobilization of Saccharomyces cerevisiae has potential in industrial applications for ethanol process.

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Surface modification of polypropylene microfiltration membranes by graft polymerization of N-vinyl-2-pyrrolidone

Cited by 117 publications

References 29 publications

Nanofibers‐based Biomedical Devices

Nanofibers‐based Biomedical Devices

Analytical Evidence

Immobilization of Saccharomyces cerevisiae on to modified carboxymethylcellulose for production of ethanol

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