Abstract: With the certain deposition process, the conversion coatings by four different
pretreatments on LF21 were studied. The morphology and the chemical composition of the
conversion coatings were examined by scanning electron microscopy (SEM). The corrosion
resistance was investigated by electrochemical impedance spectroscopy (EIS) and the salt spray test.
The results showed that the different pretreatments had obvious effect on the cerium conversion
coatings. For the certain deposition process, the optimal pretreatment process was identified.
Abstract: Recently, the increase in production, consumption causes the shortage of the natural
resources and the increase in waste disposal. In order to build up a sustainable society, the input and
the output of the natural system should be reduced by the recirculation of materials and energy. We
have tried to develop high performance building materials by solidification technology at low
temperature. The starting materials were the inorganic wastes or soil. These solidified inorganic waste
and solidifying soil have good mechanical strength for paving tile. Solidifying soil called as Tataki
works has good performance of mitigating urban heat islands. Numerical simulation method based on
heat transfer model was studied to estimate performance of mitigating urban heat islands of
solidifying soil. Numerical model was calculated by the surface temperature changes in the outside
with air temperature changes. Simulation result was compared with experimental measurement.
Abstract: Attempts have been made to sinter hexagonal boron nitride (h-BN) by
pressureless-sintering in air. In order to achieve this purpose, feldspar has been selected as a sintering
aid to produce sintered compacts at a temperature above the melting point of feldspar. Even though
h-BN was not wetted by the molten feldspar in nitrogen, the wettability was significantly improved in
air. Through the heating process, the h-BN powder disappeared owing to the oxidation of the powder
followed by sublimation of the boron oxide. The decomposition of BN was prevented effectively by
the presence of molten feldspar in the h-BN/feldspar (30 vol.%) compact. It was shown that
h-BN/feldspar composite can be sintered in air under normal pressure, although the bulk density of
h-BN/feldspar composites (1.40 to 1.51 g/cm3) was not satisfactory enough.
Abstract: The electrochemical behaviors of anodized and sealed aluminum alloys in NaCl solution
were studied by potentiodynamic polarization, the open-circuit-potential and EIS. The results show
that anodic oxidization of aluminum increases its corrosion resistance greatly. Different sealing
methods have different influences on corrosion behavior of the anodized alloys in NaCl solution;
corrosion resistance increases in the order: no sealing < water sealing < dichromate sealing < nickel
fluoride sealing. The modulus of the porous film sealed by dichromate solution increases with the
immersion time in NaCl solution, which is similar to the self-sealing effect of unsealed anodic
Abstract: Surface modification of low-density polyethylene (LDPE) films was carried out via a
novel photografting polymerization technique with acrylamide (AAm) as the monomer. The
photografting polymerization can be achieved via one-step method and two-step method. The
photografting polymerization reactivity of AAm was examined with benzophenone (BP) as the
photoinitiator and low-density polyethylene (LDPE) film as the substrate with “sandwich” assembly.
Moreover, the occurrence and evolution of grafting polymerization of AAm on the substrate was
demonstrated XPS analysis and SEM pictures.
Abstract: A process for preparing of the delaminated kaolinite was developed with intercalation of
hydrazine, urea or potassium acetate followed by removing the chemical assistants. Delaminated
kaolinite was characterized by XRD, solid-state NMR, thermal analyses, particle-size distribution
analyses, etc. The particle size was reduced to ca. 440 nm in diameter and ca.15 nm in thickness in
contrast to about 7 μm and 800 nm for untreated precursor respectively. The dehydroxylation
temperature of kaolinite was shifted from 514°C to 490°C by the delamination. Additionally, a
greater mass lost was also observed for the delaminated particles by dehydroxylation.
Abstract: Supramolecular 2,3-pyridinedicarboxylate intercalated NiAl-layered double hydroxides
(2,3-pyridinedicarboxylate-NiAl-LDHs) has been prepared by direct coprecipitation method. The
solid product was found to have a greatly expanded LDH structure. Possible orientation of
2,3-pyridinedicarboxylate between the interlayer region has been proposed. Furthermore, its
thermal decomposition process was studied by the use of TG-MS and in situ HT-XRD.
Abstract: Polyacrylonitrile (PAN) tow were continuously pretreated with cuprous chloride on line.
The structure and properties of untreated and treated PAN precursors were characterized by IR,
DSC, X-ray diffraction and other analysis, and the paper made a preliminary discussion on the
effect of modification on PAN precursors. It was suggested that PAN precursors pretreated with
CuCl can enhance the rate of cyclization, lower the temperature of cyclization reaction, reduce the
time required for stabilization. At the same time the resulting oxidized fibers achieved an elongation
of 17.6% for the temperature range of exothermic process, and an improvement in tensile strength
Abstract: A novel tube-form asymmetrical carbon membrane based on phenol-formaldehyde resin
(PFR) is proposed in this paper. The membrane is composed of Ni-P alloy on exterior surface of
carbon support membrane by electroless plating method after adding ferrous powders (<20&m) as
active particles inside the membrane procurer. The results show that the H2, N2 and CO2 permeation
rate through the composite Ni-P carbon membrane decrease and gas separation factors increase with
increase of Fe content, and H2, N2 and CO2 permeation rates reach 0.44, 0.10 and 0.08
m3.m-2.s-1.MPa-1, respectively; H2/N2 and H2/CO2 separation factors are 4.2 and 5.5, respectively.
The morphology of the membrane is measured by Scanning Electron Microscope (SEM).