effect of carbon fiber surface-treatment on mechanical properties of c/c composites

carbon fiber/carbon composites were prepared with a thermosetting resin-derived carbon matrix and two groups of carbon fibers (i. e. , surface treated and non-surface treated) with and without sizing treatment. these composites were heat treated at 1000 $degree$ c and 3000 $degree$ c. the composite with surface treated carbon fibers heat ..

surface-treated kaolins bolster performance of filled nylon

improvements in flexural modulus, heat-deflection temperature, and notched izod impact strength are observed when surface-treated calcined kaolin reinforcement is used in the engineering compound silane loading levels are identified and compared for both medium and fine particle size kaolins. the performance-enhancing properties of surfac..

review of chemical sensors for physiological measurement

the continuous measurement of chemical species is important for physiological and biochemical research and for critical care medicine. chemical sensors are being developed for the measurement of a wide range of analytes, especially gases, vapors, ions, catabolites, drugs and hormones. the mechanical form of these sensors may be adapted fo..

role of elastin in the mechanical properties of skin

the elastin fibers of rat skin samples were degraded by the use of a purified preparation of elastase to which soybean inhibitor was added, preventing the collagenolytic activity of the elastase on collagen. control experiments ascertained degradation of elastin and no effect on collagen. the mechanical properties of the skin samples were..

fast response glucose microprobe

the glucose microprobe described here is essentially a micro version of the macro probe. the starting material is the oxygen microprobe fabricated routinely in our laboratory. a 25- $mu$ m platinum wire is first etched electrolytically to a pencil shape the wire is then coated with glass excluding a few $mu$ m length at the tip. the expos..

crosslinking of epoxy resins at interfaces. v. amine-cured resins at carbon and graphite surfaces

the effects of carbon blacks, chopped carbon fibers, and crushed carbon fibers on the crosslinking chemistry of a diglycidyl epoxy resin/m-phenylenediamine system were examined by infrared spectroscopy and differential scanning calorimetry. the carbon and graphite surfaces were given oxidizing and reducing treatments to simulate the surfa..

compliant small-diameter arterial prosthetics

a synthetic artery graft is manufactured from polyetherurethane fibers (biomer). it is sufficiently porous to allow ingrowth of collagenous scar tissue. biomer has good enzyme resistance, good blood compatibility, and confers compliance to the prosthesis in both circumferential and axial directions. 16 refs

enzyme membrane bioreactor and its applications

the enzyme membrane bioreactor is a new technique emerged in recent years, which is of great significance to the development of biological engineering. this article describes the principle, structure, fabrication and applications of enzyme membrane bioreactors. (author abstract) 12 refs. in chinese

anodic oxidation of high modulus carbon fibres in sulphuric acid

the continuous anodic oxidation of high modulus (hm) carbon fibers in sulfuric acid electrolyte, with varied concentrations as a possible surface treatment method, is presented. it can be shown that within the applied potential ranges and the resulting current densities no loss of mechanical fiber properties or increase in bet surfaces is..

giving low-term antistatic properties to polyacrylonitrile fibre at the gel stage by treatment with compounds which are difficultly soluble in water

requirements for antistats to ensure a long-term antistat effect for pan fiber which has been modified in the gel state are proposed. it is shown that surface modification of pan gel-fiber by the lc salts ensures an antistatic effect which is resistant to hand washing, a high moisture absorbing power on contact with moisture, and a soft h..