The effect of temperature on surface tension

Palmer, S. J. P.

doi:10.1088/0031-9120/11/2/009

Cited by 45 publications

(28 citation statements)

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“…Also, TFA's properties as found in the literature, e.g. relatively low boiling point: 72.4°C and low surface tension: ~13.5 dyn/cm (22) are expected to be very suitable for electrospinning. DCM was also used as a second solvent at a lower ratio (20%) as its high volatility (boiling point: 39.6°C has been proved to favor the electrospinnability of chitosan when combined with TFA at a ratio of 80:20 (18).…”

Section: Preparation Of Electrospinning Solutions and Electrospinning Pmentioning

confidence: 96%

Chitosan & Conductive PANI/Chitosan Composite Nanofibers - Evaluation of Antibacterial Properties

Moutsatsou

Coopman

Georgiadou

2019

CNM

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Background: Within the healthcare industry, including the care of chronic wounds, the challenge of antimicrobial resistance continues to grow. As such, there is a need to develop new treatments that can reduce the bioburden in wounds. Objective: The present study is focused on the development of polyaniline (PANI) / chitosan (CH) nanofibrous electrospun membranes and evaluates their antibacterial properties. Methods: To this end, experimental design was used to determine the electrospinning windows of both pure chitosan and PANI/CH blends of different ratios (1:3, 3:5, 1:1). The effect of key environmental and process parameters (relative humidity and applied voltage) was determined, as well as the effect of the PANI/CH ratio in the blend and the molecular interactions between PANI and chitosan that led to jet stability. Results: The nanofibrous mats were evaluated regarding their morphology and antibacterial effect against model gram positive and gram negative bacterial strains, namely B. subtilis and E. coli. High PANI content mats show increased bactericidal activity against both bacterial strains. Conclusion: The blend fibre membranes combine the materials’ respective properties, namely electrical conductivity, biocompatibility and antibacterial activity. This study suggests that electrospun PANI/CH membranes are promising candidates for healthcare applications, such as wound dressings.

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Section: Preparation Of Electrospinning Solutions and Electrospinning Pmentioning

confidence: 96%

Chitosan & Conductive PANI/Chitosan Composite Nanofibers - Evaluation of Antibacterial Properties

Moutsatsou

Coopman

Georgiadou

2019

CNM

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“…Surface tensions of molten metals are dependent on temperature [92], as well as viscosity, especially for glass forming alloys [93]. By heating the wheel and lowering the thermal gradient, the liquid can remain at higher temperature (and, therefore, lower viscosity and surface tension) for a longer period of time, again allowing for greater conformity of the melt to the wheel surface, as illustrated in Figure 41.…”

Section: Optical and Scanning Electron Microscopymentioning

confidence: 99%

Generation and Characterization of Anisotropic Microstructures in Rare Earth-Iron-Boron Alloys

Oster

2012

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“…The infiltration pressure for pure water was observed to be 11.3 MPa; while the addition of NaCl led the infiltration pressure to increase to 18.9 MPa, and KCl solution further elevated the infiltration pressure to 21.6 MPa. In a nanoenvironment, the critical infiltration P IN is known to depend on the type and size of the nanopore, 38,39 the environmental temperature, 40 and the additive electrolyte and its concentration. 41,42 Because P IN = 4γ h /d, the enhanced surface tension of an electrolyte will undoubtedly increase the infiltration pressure.…”

Section: General Trend Of Energy Dissipation and Temperaturementioning

confidence: 99%

Experimental Study on Energy Dissipation of Electrolytes in Nanopores

et al. 2009

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When a nonwetting fluid is forced to infiltrate a hydrophobic nanoporous solid, the external mechanical work is partially dissipated into thermal energy and partially converted to the liquid-solid interface energy to increase its enthalpy, resulting in a system with a superior energy absorption performance. To clarify the energy dissipation and conversion mechanisms, experimental infiltration and defiltration tests of liquid/ion solutions into nanopores of a hydrophobic ZSM-5 zeolite were conducted. The characteristics of energy dissipation were quantified by measuring the temperature variation of the immersed liquid environment and compared against that estimated from pressure-infiltration volume isotherms during infiltration and defiltration stages of the test. Both stages were observed to be endothermic, with the temperature of the liquid phase showing a steady increase with changes in liquid saturation. The confinement of the molecular-sized pore space causes the liquid molecules/ions to transit between statuses of orderly and disorderly motions, resulting in dissipation behaviors that vary with liquid infiltration/defiltration rates and the types and concentrations of additive electrolytes in the liquid-both factors of which alter the characteristics of the nanofluidic transport behavior.

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The effect of temperature on surface tension

Cited by 45 publications

References 0 publications

Chitosan & Conductive PANI/Chitosan Composite Nanofibers - Evaluation of Antibacterial Properties

Chitosan & Conductive PANI/Chitosan Composite Nanofibers - Evaluation of Antibacterial Properties

Generation and Characterization of Anisotropic Microstructures in Rare Earth-Iron-Boron Alloys

Experimental Study on Energy Dissipation of Electrolytes in Nanopores

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