Electrospun nanofibers of poly(NPEMA-co.-CMPMA): Used as Heavy metal ion remover and water sanitizer

Shekh, Mehdihasan I.; Patel, Deep; Patel, Kaushal P.; Patel, R. M.

doi:10.1007/s12221-016-5861-9

Cited by 28 publications

(15 citation statements)

References 56 publications

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“…Activation energies of thermal decomposition steps have been established with Broido [50] and Coats [51] methods as it has been shown in various researches [52][53][54]. Obtained values are in well correspondence and are confirmed in the literature [55].…”

Section: Tga Analysissupporting

confidence: 63%

Universal approach of cellulose fibres chemical modification result analysis via commonly used techniques

2018

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This article considers the modification of cellulose fibres with the use of vinyltrimethoxysilane and maleic anhydride as substances to improve the wettability of the additive in the hydrophobic polymer matrix. The stress is put on the possible ways of modification impact investigation and its description. Effects of the treatment are analysed using Fourier transform infrared spectroscopy, which reveal the presence of new moieties on the cellulose surface, e.g. C=C bonds, C=O and Si-C groups, while dynamic light scattering investigation revealed an increase in the hydrodynamic radii of the molecules which was maximized in the case of modification with the use of maleic anhydride. Furthermore, thermal properties were defined with differential scanning calorimetry and thermogravimetric analysis. Some variations within the process of samples thermal degradation are observed-thermal stability of the specimen modified with maleic anhydride is the highest. The presented approach of combined fibre modification analysis techniques, being a scientific novelty, allows to confirm the treatment impact on cellulose properties at many levels. Graphical abstractKeywords Cellulose · Maleic anhydride · Vinyltrimethoxysilane

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Section: Tga Analysissupporting

confidence: 63%

Universal approach of cellulose fibres chemical modification result analysis via commonly used techniques

2018

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“…The band at 1245 cm −1 can be assigned to CN stretching. The band at 1097 cm −1 can be assigned to CO bending vibration for MWCNT‐OH …”

Section: Resultsmentioning

confidence: 99%

“…It has been found that the addition of nanofiller may affect the thermal stability of membranes due to the interaction between inorganic nanofiller and polymeric matrix . The addition of MWCNTs slightly increased the thermal resistance of the membranes.…”

Section: Resultsmentioning

confidence: 99%

Study on CO₂ facilitated separation of mixed matrix membranes containing surface modified MWCNTs

Zhang

Zhang³

et al. 2019

J of Applied Polymer Sci

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Mixed matrix membranes (MMMs) for CO2‐facilitated separation were prepared by incorporating different surface‐modified multiwalled carbon nanotubes (MWCNTs) in a fixed carrier membrane material. Polymer containing amino groups, poly(vinylalcohol‐co‐vinylamine) (VA‐co‐VAm) was synthesized as polymeric matrix. MWCNTs as well as MWCNTs surface‐modified with OH and NH2 were applied as nanofillers. The physical property, chemical structure, and membrane morphology were characterized by FT‐IR, TG, XRD, DSC, CA, XPS, and SEM. The effects of content, functional group, temperature, and pressure on gas permselectivity were studied. Results show that the incorporation of nanofillers can effectively restrict the polymer chain packing and lead to low crystallinity. The MMMs exhibited higher CO2 permselectivity than the pure polymeric membrane. For all the MMMs, the CO2 permeance and selectivity increased with MWCNTs contents to a maximum and then decreased. MWCNT‐NH2 can be regarded as the most effective nanofiller. MMMs with 2.0 wt % MWCNT‐NH2 displayed the highest CO2 permeance of 132 GPU and CO2/N2 selectivity of 74. Both CO2 permeance and selectivity were decreased with feed gas pressure and temperature. The membrane exhibited good stability in the testing with the binary gas mixtures of CO2/N2 for 110 h under 0.54 MPa. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47848.

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“…The antibacterial activity of a composite can be confer by the direct addition of antimicrobial agents, such as silver nanoparticles and chlorhexidine acetate (CA) into original materials, since the amount of antimicrobial agents can be mediated well during the production . CA is commonly used as an antibacterial agent because of its antimicrobial activity against a wide range of bacteria and fungi, its high kill rate and its non‐toxicity to mammalian cells .…”

Section: Introductionmentioning

confidence: 99%

Thermal stability and thermal oxidation kinetics of PU/CA‐MMT composites

Zhao

Hong

Shen

et al. 2018

J of Applied Polymer Sci

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In this work, we prepared three composites polyurethane (PU)/chlorhexidine acetate (CA), PU/montmorillonite (MMT), and PU/CA‐MMT, and investigated their kinetics of thermal degradation at different heating rates at atmosphere. These materials had good thermal stability and aging resistance. The thermal stability of PU/CA (Tonset: 237.3°C) was not obviously enhanced by the addition of only CA when compared with that of PU (Tonset: 232.3°C), while the thermal stability of PU/MMT (Tonset: 273.4°C) was considerably enhanced by the addition of MMT due to the high thermal stability of MMT. CA‐MMT filler was dispersed and exfoliated in PU more easily than CA or MMT in PU, so the composite PU/CA‐MMT possessed the best thermal stability (Tonset: 285.8°C). In addition, PU/CA‐MMT also had the best resistance to bacterial adhesion and antibacterial ability. The analysis with Flynn‐Wall‐Ozawa method showed that the activation energy of thermal oxidation of PU increased when CA‐MMT was added and thus its anti‐aging ability was enhanced, and the thermal oxidation of these four materials was first‐order reaction. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47002.

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Electrospun nanofibers of poly(NPEMA-co.-CMPMA): Used as Heavy metal ion remover and water sanitizer

Cited by 28 publications

References 56 publications

Universal approach of cellulose fibres chemical modification result analysis via commonly used techniques

Universal approach of cellulose fibres chemical modification result analysis via commonly used techniques

Study on CO₂ facilitated separation of mixed matrix membranes containing surface modified MWCNTs

Thermal stability and thermal oxidation kinetics of PU/CA‐MMT composites

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Electrospun nanofibers of poly(NPEMA-co.-CMPMA): Used as Heavy metal ion remover and water sanitizer

Cited by 28 publications

References 56 publications

Universal approach of cellulose fibres chemical modification result analysis via commonly used techniques

Universal approach of cellulose fibres chemical modification result analysis via commonly used techniques

Study on CO2 facilitated separation of mixed matrix membranes containing surface modified MWCNTs

Thermal stability and thermal oxidation kinetics of PU/CA‐MMT composites

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Product

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Study on CO₂ facilitated separation of mixed matrix membranes containing surface modified MWCNTs