The solvent induced interfiber adhesion and its influence on the mechanical and filtration properties of polyethersulfone electrospun nanofibrous microfiltration membranes

Homaeigohar, Shahin; Koll, Joachim; Lilleodden, Erica T.; Elbahri, Mady

doi:10.1016/j.seppur.2012.06.027

Cited by 63 publications

(38 citation statements)

References 23 publications

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“…This approach was successful in enhancement of the mechanical properties of a PES ENM reflected as a higher elastic modulus and compaction resistance [75]. …”

Section: Nanocomposite Enms For Water Filtrationmentioning

confidence: 99%

Nanocomposite Electrospun Nanofiber Membranes for Environmental Remediation

Homaeigohar¹,

2014

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Rapid worldwide industrialization and population growth is going to lead to an extensive environmental pollution. Therefore, so many people are currently suffering from the water shortage induced by the respective pollution, as well as poor air quality and a huge fund is wasted in the world each year due to the relevant problems. Environmental remediation necessitates implementation of novel materials and technologies, which are cost and energy efficient. Nanomaterials, with their unique chemical and physical properties, are an optimum solution. Accordingly, there is a strong motivation in seeking nano-based approaches for alleviation of environmental problems in an energy efficient, thereby, inexpensive manner. Thanks to a high porosity and surface area presenting an extraordinary permeability (thereby an energy efficiency) and selectivity, respectively, nanofibrous membranes are a desirable candidate. Their functionality and applicability is even promoted when adopting a nanocomposite strategy. In this case, specific nanofillers, such as metal oxides, carbon nanotubes, precious metals, and smart biological agents, are incorporated either during electrospinning or in the post-processing. Moreover, to meet operational requirements, e.g., to enhance mechanical stability, decrease of pressure drop, etc., nanofibrous membranes are backed by a microfibrous non-woven forming a hybrid membrane. The novel generation of nanocomposite/hybrid nanofibrous membranes can perform extraordinarily well in environmental remediation and control. This reality justifies authoring of this review paper.

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“…This approach was successful in enhancement of the mechanical properties of a PES ENM reflected as a higher elastic modulus and compaction resistance [75]. …”

Section: Nanocomposite Enms For Water Filtrationmentioning

confidence: 99%

Nanocomposite Electrospun Nanofiber Membranes for Environmental Remediation

Homaeigohar¹,

2014

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“…Although the tensile stress still increased when PVB content exceeded 20 wt%, the strain of the PVdF/PVB NFM cut down on the contrary. This resulted from the fact that large physically bonded structure made the membranes become less flexible due to their interfused and entangled nanofibers …”

Section: Resultsmentioning

confidence: 99%

“…This resulted from the fact that large physically bonded structure made the membranes become less flexible due to their interfused and entangled nanofibers. [24] On the other hand, considering the planar mechanical per formance of the membranes in practical application, bursting strength was used to determine how much force will be required to fracture the membrane, as presented in Figure 3c. The variation tendency of bursting strength and elongation of PVdF/PVB NFM were the same as that of the tensile test data.…”

Section: Mechanical Property Analysismentioning

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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“…Also, the hydrophilicity of the modified membrane was influenced by the hydrophilicity of the macromolecules and their orientation incorporated in the nanofibers. Homaeigohar and co-workers enhanced the mechanical properties of polyethersulfone ENMs by inducing interfiber adhesion through thermal treatment [85]. The thermal treatment was simple and cost-efficient.…”

Section: Mf Filtermentioning

confidence: 99%

Electrospun Nanofibrous Membranes for Liquid Filtration

Wang

Hsiao

Chu

2014

Nanostructure Science and Technology

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Liquids are essential for most of the lives and activities on earth, where liquid filtration is an important tool to remove undesired suspended solids, emulsified particles, dissolved molecules, and ions from liquids by separating the permeate from the unwanted impurities through filters. Electrospun nanofibrous membranes (ENMs) have been developed as filtration media having unique advantages over traditional membranes, due to high porosity, interconnected pore structures, large surface-to-volume ratio with capability for chemical/physical functionalization, and cost-effectiveness. The new fibrous membrane format has been used in many applications, including filtration, (membrane) distillation, and pervaporation.

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The solvent induced interfiber adhesion and its influence on the mechanical and filtration properties of polyethersulfone electrospun nanofibrous microfiltration membranes

Cited by 63 publications

References 23 publications

Nanocomposite Electrospun Nanofiber Membranes for Environmental Remediation

Nanocomposite Electrospun Nanofiber Membranes for Environmental Remediation

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

Electrospun Nanofibrous Membranes for Liquid Filtration

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