Application of Electrospun Gas Diffusion Nanofibre‐membranes in the Determination of Dissolved Carbon Dioxide

Truong, Yen Bach; O’Bryan, Yukie; McKelvie, Ian D.; Kyratzis, Ilias Louis; Humphries, William

doi:10.1002/mame.201200329

Cited by 10 publications

(7 citation statements)

References 19 publications

(17 reference statements)

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“…The enhancement of the fiber morphology could be due to the absorption of the solvents (specially the DMF) by the cellulose particles, which led to well‐defined fibers. The swelling power of the cellulose to DMF and acetone are 62 and <15 (g/g), respectively . The fiber shape and diameter depended on the conductivity of the solution, and in this case, the swelling power of the cellulose and changes in the solution conductivity as a result of the cellulose charge content may have contributed to the reduced fiber diameter.…”

Section: Resultsmentioning

confidence: 95%

Investigation of the physico‐mechanical properties of electrospun PVDF/cellulose (nano)fibers

Issa

Al-Maadeed

Luyt

et al. 2016

J of Applied Polymer Sci

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The electro‐activity and mechanical properties of PVDF depends mainly on the β‐phase content and degree of crystallinity. In this study, cellulose fibers were used to improve these characteristics. This could be achieved because the hydroxyl groups on cellulose would force the fluorine atoms in PVDF to be in the trans‐conformation, and the cellulose particles could act as nucleation centers. Electrospinning was used to prepare the PVDF/cellulose (nano)fibrous films, and this improved the total crystallinity and the formation of β‐crystals. However, the presence and amount of cellulose in PVDF were found to have little influence on the β‐phase content and on the total crystallinity of PVDF. Improvements in the extent of crystallinity and the β‐phase content were primarily brought about by the chain‐ and crystal orientation as a result of electrospinning. The thermal stability of PVDF in the composites slightly increased with increasing cellulose content in the composites up to 1.0 wt %, while the modulus and tensile strength significantly increased up to the same filler level. The dielectric storage permittivity also increased with increasing cellulose content, but the presence of cellulose had no influence on the dynamics of the γ‐ and β‐relaxations of the PVDF. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43594.

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Section: Resultsmentioning

confidence: 95%

Investigation of the physico‐mechanical properties of electrospun PVDF/cellulose (nano)fibers

Issa

Al-Maadeed

Luyt

et al. 2016

J of Applied Polymer Sci

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“…WVTR and air permeability were evaluated for indicating the thermal comfort property. The porosity and pore size of membranes contributed to the water vapor and air transferring through the macroporous membranes . Higher porosity could supply small resistance for moisture and air to diffuse rapidly through the membranes .…”

Section: Resultsmentioning

confidence: 99%

“…The porosity and pore size of membranes contributed to the water vapor and air transferring through the macroporous membranes. [27,28] Higher porosity could supply small resistance for moisture and air to diffuse rap idly through the membranes. [29] As indicated in Figure 5, the WVTR had a slightly decline from 11.2 to 9.7 kg m −2 d −1 because of the decreased porosity with increasing PVB con tents from 10 to 50 wt%.…”

Section: Breathable Performancementioning

confidence: 99%

Polyvinyl Butyral Modified Polyvinylidene Fluoride Breathable–Waterproof Nanofibrous Membranes with Enhanced Mechanical Performance

Zhang

Sheng

Yin

et al. 2016

Macro Materials & Eng

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beings. Breathable and waterproof membranes are the core functional layer of the breathable barrier fabrics. [1,2] Generally, the commercial breathable and waterproof membranes are classified roughly into two types: hydro philic thermoplastic polyurethane (TPU) nonporous mem branes and microporous membranes. Hydrophilic TPU membranes can provide good waterproofness due to their nonporous structure, but its poor moisture transmittance (4 kg m −2 d −1 ) made the wearer uncomfortable. [3] Micro porous membranes use a size exclusion theory to prevent large water droplet from penetrating and permit moisture to transport through porous structure at the same time.As one representative of typical microporous membranes, polytetrafluoroethylene superhydrophobic membranes exhibited good water resistance and modest moisture penetrability (6.3 kg m −2 d −1 ) owing to their clearly visible system of holes and interconnected passageways. [4] These two kinds of breathable-waterproof membranes were Electrospun nanofibrous membranes with outstanding mechanical property, breathability, and waterproofness are critical in protective fields; however, great challenges still remain in creating such functional materials. A novel polyvinylidene fluoride (PVdF)/polyvinyl butyral (PVB) breathable-waterproof membrane with robust mechanical performance is fabricated by introducing thermal posttreatment into electrospun membranes. Embedding of PVB enriches the pristine PVdF nanofibrous membranes with bonded network, optimized pore size, and porosity. The composite membranes are endowed with robust tensile stress of 10.5 MPa and good breaking elongation of 64.5%, which are about four times that of the pure nonbonded PVdF membranes. Apart from this, the bonded PVdF/PVB membranes express integrated properties of high water vapor transmittance rate (10.6 kg m −2 d −1 ), modest air permeability (9.8 mm s −1 ), and good waterproofness (58 kPa). Furthermore, the conveni ence and efficient of this fabrication process will allow for largescale production of PVdF/PVB breathable-waterproof nanofibrous membranes with robust mechanical perfor mance and board applications.

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“…Each column was conditioned by passing 1 M sodium nitrate solution for 10 min to convert Aliquat 336 from its chloride form to its nitrate form, and then deionized water was passed for 50 min to remove any excess Aliquat 336. [29,34,35]. The usability of DMF/THF mixtures as the solvents for the electrospinning solution containing PS and Aliquat 336 was tested.…”

Section: Flow Analysis Manifoldmentioning

confidence: 99%

Electrospun polystyrene/Aliquat 336 for preconcentration and determination of thiocyanate in flow analysis

et al. 2017

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Abstract:A new extracting polymer wool was prepared from polystyrene (PS) and the commercial extractant Aliquat 336 by electrospinning and its potential as a packing material for an online preconcentration column in an automated flow injection system was investigated for the determination of thiocyanate (SCN − ). The formation of the wool fibres was confirmed by scanning electron microscopy (SEM). The polymer wool was inserted into a glass tube to prepare a column. a sampling rate of 9 h −1 . To the authors' best knowledge this is the first time electrospun fibres containing a liquid extractant have been used for preconcentration in a flow analysis system.

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Application of Electrospun Gas Diffusion Nanofibre‐membranes in the Determination of Dissolved Carbon Dioxide

Cited by 10 publications

References 19 publications

Investigation of the physico‐mechanical properties of electrospun PVDF/cellulose (nano)fibers

Investigation of the physico‐mechanical properties of electrospun PVDF/cellulose (nano)fibers

Polyvinyl Butyral Modified Polyvinylidene Fluoride Breathable–Waterproof Nanofibrous Membranes with Enhanced Mechanical Performance

Electrospun polystyrene/Aliquat 336 for preconcentration and determination of thiocyanate in flow analysis

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