In order to evaluate the potential incorporation of 129 I into uranyl phases that would form during oxidative alteration of spent nuclear fuel, uranophane was synthesized under mild hydothermal conditions of 165 • C in the presence of iodide, iodate and periodate, respectively. The precipitates were examined and analyzed using powder X-ray diffraction (XRD), infrared spectroscopy (IR) and scanning electron microscope (SEM) equipped with an energy-dispersive X-ray spectroscopy (EDS). The results indicate that significant amount iodine can be incorporated into the structure of uranophane in the form of IO 4 − , and less in the form of IO 3 − . Crystallo-chemical analyses suggest that the incorporation mechanisms would be the substitution of iodate and periodate for SiO 4 tetrahedron in the sheet.

No abstract

In recent years, as improvement of human living life, people begin to focus on themselves health. It is certain that bamboo charcoal has many properties, including water purification, deodorization, anion release and far-infrared ray radiation. This study aims to prepare PET/BC warp-knitted fabric composed of polyester yarn (PET) as warp yarn and bamboo charcoal polyamine yarn (BC) as weft yarn using Velcro Crochet Machine. Afterwards, air permeability, elastic resilience and far-infrared ray emissivity of resulting knitted fabric were discussed by changing weft yarn type. Result shows that, for knitted fabrics, weft yarn type cannot affect the elastic resilience; yet PET weft yarn makes air permeability decreasing.

In this study, bamboo charcoal/ stainless steel complex yarns was made of stainless steel wires and polyester bamboo charcoal filaments using a rotor twister machine. The stainless steel wires served as the core yarns while the polyester bamboo charcoal filaments served as the wrapped yarns. The speed of rotor twister was set as 7000 to 11000 rpm and wrapped counts were 2 to 7 turns/ cm. Bamboo charcoal/ stainless steel complex yarns were with the tenacity as 3.08 g/d when manufacture parameters were speed of rotor twister as 8000 rpm and wrapped counts as 4.0 turns/ cm; moreover, when speed of rotor twister was at 7000 rpm and wrapped counts was 5.0 turns/cm, bamboo charcoal/ stainless steel complex yarns received the tensile strain as 24.91%. According to tensile strength test for knitted fabrics, when wrapped count was 4 turns/ cm, the knitted fabrics had its tensile strength as 214.49 N, and the vertical tensile strength was higher than the horizontal one. When the wrapped counts of bamboo charcoal/ stainless steel complex yarns was 6 turns/ cm, the knitted fabrics attained its tensile strain at 236.87%.

In this study, nonwoven selvedges served as core yarn which was wrapped with stainless steel wires. Core yarn was added with functional materials such as stainless steel wires or copper wires or both. Functional polypropylene nonwoven selvedges (PNS) complex ply yarns were made using a rotor twister machine. The wrapped density of stainless steel wires was changed as 0.5, 1.5, 2.5, 3.5 and 4.5 turns/cm and the speed of rotor twister was set at 8000 rpm. Shown in the mechanical property test of complex ply yarn, when speed of rotor twister was at 8000 rpm; wrapped density was 2.5 turns/ cm; and functional materials were copper wires and stainless steel wires, complex ply yarns made of polypropylene nonwoven selvedges (PNS) had the maximum breaking force as 47.76N and maximum breaking elongation as 47.93%.