Results 131 to 140 of about 1,281 (186)
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Cellulose, 2014
In this study, a new xylan enriched viscose fiber was developed. A high molecular weight xylan with a degree of polymerization of 150–200 was added during a late stage of the viscose production process. The xylan deriving from a cold caustic extraction (CCE) of an eucalypt paper pulp was introduced to the process after xanthation and thus neither ...
Gabriele Schild, Eva Liftinger
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In this study, a new xylan enriched viscose fiber was developed. A high molecular weight xylan with a degree of polymerization of 150–200 was added during a late stage of the viscose production process. The xylan deriving from a cold caustic extraction (CCE) of an eucalypt paper pulp was introduced to the process after xanthation and thus neither ...
Gabriele Schild, Eva Liftinger
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Optical fiber-based fluorescent viscosity sensor
Optics Letters, 2006Molecular rotors are a unique group of viscosity-sensitive fluorescent probes. Several recent studies have shown their applicability as nonmechanical fluid viscosity sensors, particularly in biofluids containing proteins. To date, molecular rotors have had to be dissolved in the fluid for the measurement to be taken.
Mark A, Haidekker +3 more
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Viscosity of fluoride glass fibers for fused component fabrication
Applied Optics, 2022Fluoride glasses show great promise for mid-IR fiber-based applications. Their brittleness and low glass transition temperature have thus far been obstacles towards obtaining low-loss fused components. Here, we suggest a simple method to measure glass viscosity over a range of process temperatures of interest for fused coupler ...
Édith Ducharme +4 more
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Producing of Carbon Fibers from Commercial Viscose Fibers
Applied Mechanics and Materials, 2019In this work, commercial Viscose fibers (cellulosic based precursor) were used for making carbon fibers. The experimental procedures include two main steps: Stabilization in air atmosphere and Carbonization in inert gas atmosphere. In the first step, the Viscose fibers are stabilized with the catalyst of mixture urea/diamonium hydrogen phosphate in air
Huu Son Nguyen +4 more
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Viscosity of silica core optical fiber
Journal of Non-Crystalline Solids, 1999Abstract Since we found that Rayleigh scattering of silica core optical fiber can be reduced by heat treatment, we studied the viscosities of the fiber to investigate this phenomenon from the viewpoint of viscous relaxation. To this end, the viscosity of silica core fiber was measured by the bending method in a temperature range of 1050–1200°C.
S. Sakaguchi, S. Todoroki
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Dissolving waste viscose to spin cellulose fibers
Polymer, 2021Abstract In recent years, the recycling of waste products has aroused widespread concern. For quality assurance and unpredictable accident, many viscose films or fibers were thrown away as offal, resulting in the waste of resources and environmental problems.
Yanan Li +5 more
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Fibers made from concentrated viscose solutions
Journal of Applied Polymer Science, 1992AbstractCellulose xanthate solutions with α‐cellulose content from 9 to 14% were obtained and their properties were examined. It has been found that viscoses containing urea are more stable and possess lower viscosity as compared with conventional viscoses.
B. Laszkiewicz, P. Wcislo, J. A. Cuculo
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Optical Fiber Probe for Viscosity Measurements
26th International Conference on Optical Fiber Sensors, 2018An optical fiber probe was developed for viscosity measurements. The sensor acts as a two-wave interferometer, sensible to the position of the fluid inside the cavity. Viscosity is measured through the fluid evacuation velocity.
André D. Gomes +5 more
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Fire-Resistant Viscose Rayon Fiber Materials
Fibre Chemistry, 2016The possibility of directly controlling the structure and properties of viscose rayon fiber materials is considered here in the modification with flame retardants and fire retardant systems. The dependence is shown of the degree of crystallinity, the physicomechanical properties, and thermolysis and combustion indicators of the materials on their ...
E. V. Bychkova, L. G. Panova
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"Polykon'' mosaic membranes reinforced with viscose fiber
Proceedings of the International Scientific and Technical Symposium «Improving energy and resource efficiency and environmental safety of processes and devices in the chemical and related industries» dedicated to the 110th anniversary of A. N. Planovsky : Vol. 2, 2021Some features of fabrication of "Polykon" mosaic membranes obtained by the "from anionite to cationite" technology are considered. The results of an experimental study of the physical and mechanical properties of a material as an object of ionic transfer are presented.
Denis V. Terin +3 more
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