Liquid paraffin

About: Liquid paraffin is a research topic. Over the lifetime, 6185 publications have been published within this topic receiving 52956 citations.

Fabrication of single-mode circular optofluidic waveguides in fused silica using femtosecond laser microfabrication

Abstract: We demonstrate fabrication of single-mode circular optofluidic waveguides in fused silica glass substrates using femtosecond (fs) laser assisted chemical etching based on slit beam shaping. The fabrication procedure consists of four steps: slit-assisted fs laser direct writing of fused silica, selective chemical etching, polydimethylsiloxane film bonding, and vacuum-assisted liquid filling. The combination of slit beam shaping and high numerical aperture objectives ensures very narrowly modified lines with nearly circular cross-sections during laser direct writing. Introduction of a string of extra-access ports allows production of uniform circular microchannels with the diameters of ~10 µm and the lengths at the centimeter scale due to the improvement of wet chemical etching process. By vacuum-assisted filling a mixture of liquid paraffin and decane into a microchannel structure, a single-mode circular optofluidic waveguide embedded in glass can be obtained.

Atmospheric Pressure Glow-Discharge Plasmas with Gas–Liquid Interface

Abstract: An atmospheric pressure glow-discharge plasma in contact with liquid is generated using a capacitively coupled plasma (CCP) method, by which a boundary region between a plasma (gas-phase) and liquid paraffin (liquid-phase), ie, gas–liquid interface is considered to be important A stable atmospheric pressure plasma with liquid is achieved by selecting the appropriate mesh electrode and liquid paraffin In addition, results of optical emission spectroscopy indicate that carbonic species come from paraffin in the interface region of the plasma This plasma is accordingly expected to promote the use of an attractive plasma process for creating materials encapsulating various elements in liquids

Preparation of polyHIPE via CuAAC ``click'' chemistry and its application as a highly efficient adsorbent of Cu(II) ions

Abstract: A hydrophilic emulsion-templated porous polymer (polyHIPE) is synthesized by CuAAC “click” chemistry. Herein, a 4,4′-diazidostilbene-2,2′-disulfonic acid disodium salt-4H2O (DAS) and tripropargylamine in the mixture of water and N,N-dimethylformamide solution is used as external phase of the high internal phase emulsion template, and paraffin liquid is involved as the internal phase. The resulting polyHIPE has a well-defined interconnected pore structure, which could be tailored by changing preparation parameters, such as reagent content, internal phase volume fraction, and surfactant concentration. Thermal analysis shows that the polyHIPE is stable under 180 °C. Owing to the presence of a large number of sodium sulfonate groups from the reagent DAS and the triazoles groups produced in the reaction, the polyHIPE is proved to be a highly efficient adsorbent of heavy metal ion (i.e., up to 52 mg/g for Cu(II) ions) in water. © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 2129–2135

Further evidence of filler–filler mechanical engagement in rubber compounds filled with silica treated by long-chain silane

Abstract: The present study discusses that filler–filler mechanical engagement resulting from the grafted long-chain silanes on the silica surface is indeed a reinforcing mechanism in rubber composites, as already speculated by nonlinear viscoelastic properties in our previous study. The existence and severity of such a phenomenon are assessed purely by isolating the energetic contribution of reinforcement from interfering with filler mechanical engagement in the silica network formation and breakdown processes. In a novel approach, the driving force of fillers to flocculate energetically at elevated temperatures was defined using surface energy theories, and it was adjusted to be similar in two composites having silica treated by short- and long-chain silanes. Filler–filler mechanical engagement was monitored by tracking network formation (filler flocculation) in a matrix of styrene–butadiene rubber and also by conducting various dynamic viscoelastic experiments on liquid paraffin suspensions having short...

The Removal of Oils from Textile Materials

Abstract: The influence of the textile substrate on the detergency process is investigated by straightforward oil removal evaluation in conjunction with contact angle measurements Difficulty of oil removal is associated with matching of the polarities of oil and fiber which, since oils are at least moderately nonpolar, means that, in general, the more hydrophobic the fiber, the more difficult is oil removal. A general correlation found between detergency and contact angle measurements for liquid paraffin and olive oil implies the adequacy of the "rolling up" mechanism as a description of the detergency process for these oils on assemblies of loose fibers. Discrepancies in the case of two fibers are attributed to the effect of a "capillary displacement" mechanism.