Polymer surface with graft chains

Kato, Koichi; Uchida, Emiko; Kang, En‐Tang; Uyama, Yoshikimi; Ikada, Yoshito

doi:10.1016/s0079-6700(02)00032-1

Cited by 592 publications

(187 citation statements)

References 326 publications

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“…The grafting of materials to the membrane surface through various procedures such as chemical, UV-initiated grafting, plasma grafting, and ozone grafting are normally quite stable, as the materials are covalently bonded to the membrane surface [12].…”

Section: -4 Surface Modification and Graftingmentioning

confidence: 99%

Surface modification of microporous polypropylene membrane by UV-initiated grafting with poly(ethylene glycol) diacrylate

Chan

Obendorf

2014

Fibers Polym

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In this study, poly(ethylene glycol) diacrylate (PEGDA) was surface grafted, through UV-initiated grafting, on to a microporous polypropylene (PP) membrane in order to develop and control a moisture-sensitive porous structure. Based on the concentration of the PEGDA grafting solution, as well as other variables, the pores of the membrane were filled to varying degrees with cross-linked PEGDA hydrogel, decreasing the pore sizes. This decrease in pore size was highly dependent on the grafting degree, or weight add-on of the grafted polymer. The grafting degree can be controlled by altering various grafting conditions. The surface grafted PEGDA is expected to swell significantly when exposed to moisture, through change in relative humidity or a liquid-borne pathogen, causing the pore sizes to decrease even further.This provides a microporous polypropylene membrane with improved hydrophilicity and moisture-responsive pores. The membranes will have varying levels of breathability based on the amount of moisture exposure. This will allow for a functional membrane that limits the transport of liquid-borne pathogens while providing transport of moisture vapor away from the body.iii BIOGRAPHICAL SKETCH Mark Chan was born in sunny California during the Chinese year of the Dragon, 1988. After a long and successful career from pre-school through high school,

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Section: -4 Surface Modification and Graftingmentioning

confidence: 99%

Surface modification of microporous polypropylene membrane by UV-initiated grafting with poly(ethylene glycol) diacrylate

Chan

Obendorf

2014

Fibers Polym

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“…Furthermore, polymers may respond to external stimuli, for instance pH [30,31], temperature [32], ionic strength [33] or infrared light [21]. Covalently grafting such polymers to a surface will result in stable stimuli-responsive polymer brushes [34,35] that respond to a stimulus by changing surface chemistry and structure and therefore may adsorb or desorb pollutants. Indeed, the sorption properties of grafted polymer brushes on clays have been recently acknowledged [28,36,37].…”

Section: Introductionmentioning

confidence: 99%

“…Indeed, the sorption properties of grafted polymer brushes on clays have been recently acknowledged [28,36,37]. However, none of these studies demonstrated the application of these sorbents in filtration columns, which is the most probable mode in which any candidate sorbent will be applied and compared with other sorbents [34]. Furthermore, in many cases, the limiting factor in applying such sorbents is their inefficient reuse [38,39] since the regeneration should selectively remove the pollutant while the polymer must remain intact.…”

Section: Introductionmentioning

confidence: 99%

Designing a regenerable stimuli-responsive grafted polymer-clay sorbent for filtration of water pollutants

Gardi

Mishael

2018

Science and Technology of Advanced Materials

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A novel, stimuli-responsive composite, based on poly(4-vinylpyridine) (PVP) brushes, end-grafted to montmorillonite clay (GPC), was designed as a regenerable sorbent for efficient removal of pollutants from water. We characterized the novel composite sorbent and its response to pH, employing Fourier transform infrared, X-ray photoelectron spectroscopy, X-ray diffraction, thermogravimetry analysis and zeta potential measurements. In comparison with conventional, electrostatically adsorbed PVP composites (APC), the GPC presented superior characteristics: higher polymer loading without polymer release, higher zeta potential and lower pH/charge dependency. These superior characteristics explained the significantly higher removal of organic and inorganic anionic pollutants by this composite, in comparison with the removal by APC and by many reported sorbents. For example, the filtration (20 pore volumes) of selenate by GPC, APC and a commercial resin column was complete (100%), negligible (0%) and reached 90% removal, respectively. At low–moderate pH, the grafted polymer undergoes protonation, promoting pollutant adsorption, whereas at high pH, the polymer deprotonates, promoting pollutant desorption. Indeed, ‘in-column’ regeneration of the GPC sorbents was achieved by increasing pH, and upon a second filtration cycle, no reduction in filter capacity was observed. These findings suggest the possible applicability of this stimuli-responsive sorbent for water treatment.

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“…Surface modification of materials by polymers is an effective technique to improve the material properties and incorporate the functions of the polymer [1][2][3]. Surface modification with a copolymer system is another important issue for the preparation of materials with tailor-made properties that are composed of two different monomers having diverse chemical and/or physical properties [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Thermal Stability and Selectivity by Introducing Aminotriazine Comonomer to Poly(Octadecyl Acrylate)-Grafted Silica as Chromatography Matrix

et al. 2018

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This paper introduces a poly(octadecyl acrylate) (pODA)-based organic phase on silica, which is assisted by 2-vinyl-4,6-diamino-1,3,5-triazine (AT), for a chromatography stationary phase. The ODA-AT copolymer grafting onto silica surface was characterized by elemental analysis, FT-IR spectroscopy, scanning electron microscopy, thermo gravimetric analysis and differential scanning calorimeter (DSC). An endothermic peak top of the copolymer-grafted silica was increased to 46 • C from 38 • C, which was a peak top of pODA homopolymer. For high performance liquid chromatography (HPLC) application, the molecular selectivity increased with an increase in the AT contents of the ODA-AT copolymer as organic phase. The co-existence of an aminotriazine moiety in the copolymer promoted side-chain ordering of the poly(octadecyl) moiety, thus enhancing molecular planarity selectivity for PAHs in reversed-phase liquid chromatography.

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Polymer surface with graft chains

Cited by 592 publications

References 326 publications

Surface modification of microporous polypropylene membrane by UV-initiated grafting with poly(ethylene glycol) diacrylate

Surface modification of microporous polypropylene membrane by UV-initiated grafting with poly(ethylene glycol) diacrylate

Designing a regenerable stimuli-responsive grafted polymer-clay sorbent for filtration of water pollutants

Enhancement of Thermal Stability and Selectivity by Introducing Aminotriazine Comonomer to Poly(Octadecyl Acrylate)-Grafted Silica as Chromatography Matrix

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