Radiation grafting of N,N′-dimethylacrylamide and N-isopropylacrylamide onto polypropylene films by two-step method

Contreras-García, Angel; Burillo, Guillermina; Aliev, Roustam; Bucio, Emilio

doi:10.1016/j.radphyschem.2008.02.007

Cited by 44 publications

(16 citation statements)

References 21 publications

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“…Techniques reported in literature to graft PNIPAAm onto polymer surfaces include electronbeam radiation, gamma radiation, plasma radiation; UV-irradiation; ozonation; coronadischarge; chemical treatment, and controlled radical polymerisation techniques [11][12][13]. A key aspect for polymer graft polymerisation is surface functionalisation.…”

Section: Introductionmentioning

confidence: 99%

Development of thermoresponsive poly(propylene-g-N-isopropylacrylamide) non-woven 3D scaffold for smart cell culture using oxyfluorination-assisted graft polymerisation

Chetty

Vargha

Maity

et al. 2013

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Growing cells on 3D scaffolds is far superior to the conventional 2D monolayer culture method. In this study, a novel 3D thermoresponsive poly(propylene-g-Nisopropylacrylamide) (PP-g-PNIPAAm) non-woven fabric (gNWF) was developed for cell culture using oxyfluorination-assisted graft polymerisation (OAGP). New polar functional groups were detected on the oNWF, and PNIPAAm was confirmed in the gNWF by Attentuated Total-Reflectance Fourier transform infrared (ATR-FTIR) and scanning x-ray photoelectron spectroscopy (S-XPS). Scanning electron microscopy (SEM) revealed a rough surface morphology and confinement of the PNIPAAm graft layer to the surface of the fibres in the gNWF. The OAGP method did not affect the crystalline phase of bulk PP, however, twin-melting thermal peaks were detected for the oNWF and gNWF indicating crystal defects. Contact angle studies showed that the surface of the gNWF exhibited a thermoresponsive behaviour. Hepatocyte cells attached onto gNWF disks in a bioreactor at 37ºC and remained viable for 10 days in culture. Upon cooling the cell culture media to 20ºC, cells were spontaneously released as 3D multi-cellular constructs without requiring destructive enzymes. The development of 3D thermoresponsive scaffolds capable of non-invasive 3D cell culture could provide a more reliable in vitro model for cells.

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Section: Introductionmentioning

confidence: 99%

Development of thermoresponsive poly(propylene-g-N-isopropylacrylamide) non-woven 3D scaffold for smart cell culture using oxyfluorination-assisted graft polymerisation

Chetty

Vargha

Maity

et al. 2013

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…Grafting represents a method of polymeric materials modification (Contreras-García, Burillo, Aliev, & Bucio, 2008) that allows to improve the properties of natural or synthetic polymers. The conventional grafting polymerization technique requires, indeed, the introduction of chemical groups to impart new characteristics, to the modified polymers, for different applications (Dergunov et al, 2008;Joung, Choi, Bae, & Park, 2008;Shin, Lee, & Park, 2008).…”

Section: Introductionmentioning

confidence: 99%

Antioxidant–polysaccharide conjugates for food application by eco-friendly grafting procedure

Spizzirri

Parisi

Iemma

et al. 2010

Carbohydrate Polymers

132

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“…''Intelligent'' or smart polymers are stimuliresponsive materials that undergo volume changes in response to changes in temperature and pH. These unique characteristics are of great interest in drug delivery [7][8][9]. Thermo-responsive films exhibit changes with temperature variations and have the advantage of being easily manipulated to specific temperatures [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Radiation-Grafting of Thermo- and pH-Sensitive Poly(N-Vinylcaprolactam-co-Acrylic Acid) onto Silicone Rubber and Polypropylene Films

et al. 2014

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This work focuses on the effect of gamma-ray radiation conditions on the stimuli-responsive of polypropylene (PP) films and silicone (SR) rubber substrates grafted with N-vinylcaprolactam (NVCL) and acrylic acid (AAc). PP films and SR rubber were weighed and placed into glass ampoules and exposed to 60 Co γ-source in the presence of air at room temperature, at dose rate around 12 kGy h -1 and dose between 5 and 70 kGy. Solutions of NVCL and AAc (1/1, v/v), 50 % monomer concentration (v/v) in toluene were added to the samples, the ampoules were degassed by repeated freeze-thaw cycles (5 times per 20 min) and sealed. The ampoules were heated at 60 or 70 °C at reaction time per 12 h. To extract the residual monomer and homopolymer formed during the grafting, the samples were soaked in ethanol for 24 h and then in distilled water, followed by drying under vacuum to constant weight. The values of grafting percentage achieved at a given irradiation dose were higher for SR than for PP. Samples where characterized by FTIR-ATR, DSC, swelling, LCST, and pH critical point.

show abstract

Radiation grafting of N,N′-dimethylacrylamide and N-isopropylacrylamide onto polypropylene films by two-step method

Cited by 44 publications

References 21 publications

Development of thermoresponsive poly(propylene-g-N-isopropylacrylamide) non-woven 3D scaffold for smart cell culture using oxyfluorination-assisted graft polymerisation

Development of thermoresponsive poly(propylene-g-N-isopropylacrylamide) non-woven 3D scaffold for smart cell culture using oxyfluorination-assisted graft polymerisation

Antioxidant–polysaccharide conjugates for food application by eco-friendly grafting procedure

Radiation-Grafting of Thermo- and pH-Sensitive Poly(N-Vinylcaprolactam-co-Acrylic Acid) onto Silicone Rubber and Polypropylene Films

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