Showing papers by "Nobuatsu Watanabe published in 1981"
TL;DR: In this paper, Monte Carlo calculations have been carried out with the Metropolis method for two systems each containing 63 ST 2 water and one Lennard Jones solute in NVT ensemble at 298.15 K and 18.07 cm3 mol−1.
Abstract: Monte Carlo calculations have been carried out with the Metropolis method for two systems each containing 63 ST‐2 water and one Lennard‐Jones solute in NVT ensemble at 298.15 K and 18.07 cm3 mol−1. The solutes chosen approximately simulate ethane and pentane. The internal energy and various distribution functions have been calculated and their results enable us, when combined with the previous study on methane and isobutane solutions, to examine the solute size dependence of hydrophobic hydration. Although energetic stabilization and structuration of water due to the introduction of a nonpolar solute have been shown to exist for all of the four solutions studied, they do not change monotonically with the size of solute. A long MC run has also been done for an aqueous methane solution to check the convergence characteristics of the present calculation.
45 citations
TL;DR: In this paper, a graphite intercalation compound of graphite with AlF3 and F2, CxF(AlF3)y was prepared under fluorine atmosphere at temperatures of 20-400 °C.
Abstract: Ternary intercalation compound of graphite with AlF3 and F2, CxF(AlF3)y was prepared under fluorine atmosphere at temperatures of 20–400 °C. Typical 1st stage compound has a composition of C6F(AlF3)0.15 with repeat distance 9.40 A. Rapid progress in the reaction led to the formation of graphite fluoride, (C2F)n.
19 citations
TL;DR: In this article, a graphite intercalation compound of graphite with AlF3 and F2, CxF(AlF3)y was prepared under fluorine atmosphere at temperatures of 20-400 °C.
Abstract: Ternary intercalation compound of graphite with AlF3 and F2, CxF(AlF3)y was prepared under fluorine atmosphere at temperatures of 20–400 °C. Typical 1st stage compound has a composition of C6F(AlF3)0.15 with repeat distance 9.40 A. Rapid progress in the reaction led to the formation of graphite fluoride, (C2F)n.
15 citations
Patent•
15 Dec 1981
TL;DR: In this paper, a graphite fluoride type film on the surface of an aluminum substrate has been produced, which exhibits high degree of hydrophobicity and corrosion resistance to aqueous solutions of acid and alkali.
Abstract: A process for producing a novel graphite fluoride type film on the surface of an aluminum substrate in which an aluminum substrate and a carbonaceous material or polycarbon monofluoride represented by the formula (CF)n are heated in an atmosphere of fluorine gas. The film has a luster, and not only exhibits high degree of hydrophobicity but also has corrosion resistance to aqueous solutions of acid and alkali as well as a mechanical strength.
5 citations
TL;DR: In this article, a novel intercalation compound of a graphite with a thiazyl salt represented by the formula Z?S4N4?2SbCl5 wherein Z stands for C24 is presented.
3 citations
TL;DR: Poly-(dicarbon monofluoride), (C 2 F) n was prepared at low temperatures of 335 to 374°C with faster reaction rate from exfoliated graphite than from natural graphite as mentioned in this paper.
3 citations
TL;DR: In this paper, the mechanism of thermal decomposition of graphite fluoride, (CF)n in a vacuum was studied by means of chemical and gas analyses, and the measurement of crystallinity.
Abstract: The mechanism of thermal decomposition of graphite fluoride, (CF)n in a vacuum was studied by means of chemical and gas analyses, and the measurement of crystallinity. The crystallinity of (CF)n was slightly improved in the step of initial decomposition. The fluorine/carbon atomic ratio of initial gaseous product evolved by decomposition was about 2. The product is CF2 or C2F4, and then it gives several compounds by secondary reaction. Every second layers of (CF)n are decomposed, and the evolved molecules or radicals abstract fluorine atoms which are bonded to the neighboring two layers.
TL;DR: In this article, pyrolytic carbon was intercalated into flaky or powdery natural graphite in CCl4 or SOCl2, and the electrical conductivity was higher than that of original pyrotechnic carbon by one order.
Abstract: Thiazyl salts prepared from S3N3Cl3 and MCl3(M=Sb, Fe, Al) were intercalated into flaky or powdery natural graphite in CCl4 or SOCl2. Intercalation compounds prepared are C24S4N4·2SbCl5[2nd stage, Ic(repeat distance)=12.81±0.02 A], C9.5·0.2(S3N3Cl3·FeCl2)·0.8(SOCl2·FeCl2) [2nd stage, Ic=12.77±0.03 A], C11S3N3Cl3· 2.4FeCl2 [a mixture of 1st and higher stage compounds, Ic=9.17±0.05 A] and C24·0.4(S3N3Cl3·2AlCl2)·0.6(SOCl2·2AlCl2) [a mixture of 2nd and 3rd stage compounds, Ic=12.89±0.03 A, 16.23±0.03 A]. Electrical conductivity of pyrolytic carbon–S4N4·2SbCl5 [3rd stage] is higher than that of original pyrolytic carbon by one order.