نتایج جستجو برای: cationic polyurethane dispersion
تعداد نتایج: 87405 فیلتر نتایج به سال:
The complex of polyacrylic and polyurethane films physical mechanical properties the operational leather decorated with them has been studied. polyacrylate protective coatings formation is performed on grain face semi-finished leather. 
 150–200 µm thick are formed from polymer solutions aqueous dispersions. Acrylic obtained a dispersion methylbutylacrylate modified by acrylic lcarboxyetha...
In recent years, adhesive wound dressings have been increasingly applied postoperatively because of their ease of use as they can be kept in place without having to cut and apply surgical tapes and they can cover a wound securely. However, if a wound dressing strongly adheres to the wound, a large amount of stratum corneum is removed from the newly formed epithelium or healthy periwound skin. V...
Polyurethane/zeolite 13X nanocomposite films were fabricated using solution casting method. The synthesized nanocomposite films were structurally characterized using SEM, TGA and tensile analysis. SEM images showed appropriate distribution of nanocrystalline zeolite particles within polyurethane matrix. Better thermal stability of nanocomposite films in comparison to neat polyurethane was shown...
Polyurethane-immobilized Flavobacterium cells (ATCC 39723) degraded pentachlorophenol (PCP) at initial concentrations as high as 300 mg liter-1. The reversible binding of PCP to the polyurethane was shown to be important in the protection of the cells from inhibition of PCP degradation. The degradation activity of the bacteria was monitored for 150 days in semicontinuous batch reactors. The deg...
Abstract Background: Twenty percent of dialysis patients eventually require arterial grafts as the only method of vascular access for hemodialysis. Polyurethane and ploy tetra fluoro ethylene grafts have been used for years for vascular access in hemodialysis patients. The purpose of this study was to compare the efficacy and complications of these two types of grafts. Methods: In this rand...
Background and purpose: Studies showed that biocompatible and biodegradable materials in tissue engineering can be used to heal wounds. The aim of this study was to fabricate polyurethane/royal jelly/hyaluronic acid scaffold with suitable biological properties for wound healing using electrospinning method. Materials and methods: In this applied experimental study, to make a nanofiber scaffold...
One way of thermal stability methods and ablation improving for polyurethane elastomers to solid propellant rocket insulation, is using of fillers with high ablation property such as silica particles. In this research, first polyurethane-silica composites (16, 25 and 38% by weight) and polyurethane-silica nanocomposites (5, 10, 16 and 25% by weight) were prepared and then interaction, morpholog...
A sensitive methodology for PCR detection of Staphylococcus aureus or Bordetella pertussis DNA within cot mattress polyurethane foam was developed. The assay's applicability was evaluated on polyurethane foam from used cot mattresses. S. aureus DNA was detected in 42% of mattresses of sudden infant death syndrome (SIDS) victims and 29% of comparison group (no death) mattresses tested. B. pertus...
A sensitive methodology for PCR detection of Staphylococcus aureus or Bordetella pertussis DNA within cot mattress polyurethane foam was developed. The assay's applicability was evaluated on polyurethane foam from used cot mattresses. S. aureus DNA was detected in 42% of mattresses of sudden infant death syndrome (SIDS) victims and 29% of comparison group (no death) mattresses tested. B. pertus...
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