New solvent for polyamides and its application to the electrospinning of polyamides 11 and 12

Behler, Kristopher; Havel, Mickaël; Gogotsi, Yury

doi:10.1016/j.polymer.2007.08.058

Cited by 59 publications

(56 citation statements)

References 21 publications

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“…It can be envisaged, that the rapid solidification of the polymer solution limits the development of crystallinity while the solidification during film casting takes place slowly resulting in higher degree of crystallinity. Similar results have been reported for poly (lactic acid) (PLLA) [32], Nylon terpolymer [2], Nylon 11 [33] and in PET [34].…”

Section: Differential Scanning Calorimetry (Dsc)supporting

confidence: 87%

Preparation and characterization of electrospun fibers of Nylon 11

Dhanalakshmi¹,

Jog²

2008

Express Polym. Lett.

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Abstract. Nylon 11 nanofibers mats were successfully prepared by electrospinning process from formic acid solution. The scanning electron microscopy (SEM) images showed that nanofibers with uniform diameter were produced when the polymer concentration was 10% w/v, whereas ribbons were formed at a higher concentration. The crystalline structure of the nanofibers mats was investigated using X-ray diffraction (XRD) and it was found that the nanofibers mats crystallized in γ form. The melt crystallized as well as solution casted films however exhibited α form. The thermal properties of these samples were studied using differential scanning calorimetry (DSC) and it was observed that electrospun fibers showed higher crystallinity than the melt-crystallized samples. However, the crystallinity of electrospun fibers was lower than the solution-crystallized sample.

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Section: Differential Scanning Calorimetry (Dsc)supporting

confidence: 87%

Preparation and characterization of electrospun fibers of Nylon 11

Dhanalakshmi¹,

Jog²

2008

Express Polym. Lett.

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“…Electro-spun fibers can be assembled into a non-woven like structure, with pore size, thickness and porosity that can be tuned by changing the spinning conditions [274]. Feng et al [275] investigated the processing of PVDF nano-fibers and desalination of 3.5 wt % NaCl solution with salt rejection rates between 98.7% and 99.9%.…”

Section: Electro-spun Membranesmentioning

confidence: 99%

Advances in Membrane Distillation for Water Desalination and Purification Applications

Camacho

Dumée

Zhang

et al. 2013

Water

626

342

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Membrane distillation is a process that utilizes differences in vapor pressure to permeate water through a macro-porous membrane and reject other non-volatile constituents present in the influent water. This review considers the fundamental heat and mass transfer processes in membrane distillation, recent advances in membrane technology, module configurations, and the applications and economics of membrane distillation, and identifies areas that may lead to technological improvements in membrane distillation as well as the application characteristics required for commercial deployment. Keywordsa function of temperature, vapor pressure, and of the gas molecular mass K 0 membrane characteristic defined by Equation (9) Kn Knudsen number K(T) a function of temperature and molecular weight of the gas l mean free path of the molecules l m distance between parallel spacer fibres (m) LEP Limit Entry Pressure (kPa) M molecular mass (g/mol) M w molecular weights of water (g/mol) M a molecular weights of air (g/mol) n number of CNTs per unit cross section in bucky-paper P pressure in the air gap (kPa) half time to reach the maximum intensity-laser flash technique (s) t proportion of conductive heat (balance due to evaporative heat) loss through the membrane T mean temperature in the pores (K)

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“…Formic acid and acetic acid are part of this range and are the least toxic. Moreover formic acid is often used for electrospinning various polymers in literature [29][30][31][32][33]. A combination formic acid/acetic acid is less exploited but showed to be very promising for polyamide 6 [34].…”

Section: Solvent Studymentioning

confidence: 99%

An alternative solvent system for the steady state electrospinning of polycaprolactone

Schueren

Schoenmaker

Kalaoğlu

et al. 2011

European Polymer Journal

240

139

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Polycaprolactone (PCL) is a biocompatible aliphatic polyester with many possible applications in the medical field. PCL nanofibres, produced by electrospinning, could provide new characteristics that are of interest for these applications. However, a key prerequisite is the ability to obtain bead-free fibres with diameters in the nanoscale range. At present the most commonly used solvent for electrospinning PCL is chloroform, but this only leads to fibres in the microscale range. Therefore various solvent systems were examined in this study.The innovative solvent mixture formic acid/acetic acid was found to allow for nanofibres with a diameter ten times smaller than chloroform. Moreover, steady state conditions could be obtained which thus allow electrospinning in a stable and reproducible way. Further it was noticed that the average fibre diameter decreased with decreasing polymer concentration while the diameter distribution decreased with increasing amount of formic acid. Also the humidity, an often overlooked yet important parameter, was noted to affect both diameter 2 characteristics. Generally it can be concluded that the solvent system formic acid/acetic acid could fill the gap in electrospinning PCL since it is readily able to produce uniform fibres in the nanoscale range.

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New solvent for polyamides and its application to the electrospinning of polyamides 11 and 12

Cited by 59 publications

References 21 publications

Preparation and characterization of electrospun fibers of Nylon 11

Preparation and characterization of electrospun fibers of Nylon 11

Advances in Membrane Distillation for Water Desalination and Purification Applications

An alternative solvent system for the steady state electrospinning of polycaprolactone

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