Y. L. Zhang1) and G. Spinks2) 1) Departmentof Mechanical Engineering
,
Ngee Ann Polytechnic
,
535 Clementi Road
,
Singapore5994892) Intelligent Polymer Research Institute
,
University of Wollongong
,
Northfields Ave
,
Wollongong
,
NSW
,
Australia
,
2522
金属学报(英文版)
Arolled mild steel wascoated byconductive polymers( polyaniline/ MMPand polyaniline/HCSA) andthenim mersedin hot water(50 ℃) fordifferenttimesforstudytheadhesion ofcoatings.It wasfound thatthe adhesion tendsto decrease over time. Thestudyshown that onebrittle and porous Fe3 O4 layer formed between conductive polymercoating and steelsub stratein a moistenvironmentand, asa result, decreased thecoating adhesions.
关键词:
conductive polymercoating
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null
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null
Wenbo FEI
材料科学技术（英文）
This paper shows that it is easier to form intelligent ceramics than other materials. Self-adaptive factors and relevant function mechanisms, which determine the formation of intelligent ceramics, are studied and data from the design of the PLZT with complex functions are presented.
关键词:
新型炭材料
Carbon nanotubes (CNTs) which have pi-pi conjugated electronic structure, can be functionalized by forming composites with some polymers with similar structure through van der Waals forces. CNTs coated with electronic conducting polymers (ECP) can be used in electronic devices such as supercapacitors. CNTs modified by conjugated luminescent polymers can form CNT/polymer composites, which have strong luminescence, and these photo-excited composites may be promising as electron acceptors and optoexcited devices. CNTs can also be functionalized and solubilized by attaching aminopolymers, as a result, they may find applications in biological systems. The state-of-the-art research results demonstrate that CNT/polymer composites have many promising applications to be developed and exploited.
关键词:
carbon nanotube;polymer;functional composite;nanotubular materials;conducting polymers;polypyrrole;supercapacitors
$ D.L*
,
D.N.He
,
X.J.Bao
,
Y. Q.Zhang
,
X. Y.Ruan
,
J.L. Cheng and J. Y. Jiang 1) National Die & Mold CAD Engineering Research Center
,
Shanghai Jiaotong University
,
Shanghai 200030
,
China 2) Shanghai Volkswagen Automotive Company Limited
,
Shanghai 201805
,
China
金属学报(英文版)
With the combination of a new theoretical formula, physical simulation experiments, the technology of artificial neural network and database, an intelligent system for the prediction of sheet metal drawing capability is constructed for the first time. A modified criterion for sheet metal drawing capability is proposed in this paper, namely, the Technological Limiting Drawing Ratio, TLDR = f(R, n, s, t, F, μ,r_d,r_p…). Based on the studies of other scholars, a new formula is derived to predict the TLDR in this paper. Then a series of orthogonal physical simulation experiments are designed to investigate the effect of technological parameters on the TLDR, and the results are analyzed in the paper. Then the predicting system is constructed with the combination of the theoretical formula, orthogonal experiments, the technology of artifocial neural network and database. The predicted results show good agreements with experimental data, so it can be used to avoid the blindness in the selection of sheet metal before stamping. The system operates under the Windows operating system, and it supports the mechanism of Client/Server as well as Intranet, so the system has high engineering value.
关键词:
TLDR
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null
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null
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null
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null
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null
,
null
MA Zongyi YAO Zhongkai Harbin Institute of Technology
,
Harbin
,
China
金属学报(英文版)
The SiC_w/Al composite prepared by squeeze casting has a combination of superior room temperature specific strength and modulus together with excellent thermal properties.The extrusion can make an improvement on the strength and ductility of the composite from 582 MPa as squeeze casted up to 639 MPa,and on the transformation from isotropic to the anisotropic structure.This seems to be explained by the orientation of whiskers and the densification of dislocations in matrix.TEM observation indicates that the stacking fault is the usual planar defect on the SiC_w surface. composite;;SiC whisker;;Al alloy;;microstructure
关键词:
composite
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null
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null
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null
Chemical Journal of Chinese Universities-Chinese
Based on the configuration changes induced by some special interactions between polymer chains, the translocation of a single polymer chain through nanopore on a membrane was investigated. The influence of the interactions between the introduced polymer chain and the translocating one on the. mean first-passage time MFPT) was studied, and then the corresponding numerical simulations were presented under different conditions. It is shown that, the interactions between polymer chains have influence on the mean first-passage time MFPT) and the translocating polymer chain can significantly decrease under certain conditions. Moreover, some relevant factors associated with the translocating process such as the effects of the values of chemical potential are also discussed.
关键词:
nanopore;hydrogen bond;mean first-passage time(MFPT);pore;hole
Applied Physics Letters
The Co/ZnO core/shell nanoparticles-filled polymer poly(vinylidene fluoride) (PVDF)-based composites (0-3 connectivity) are fabricated, in which the core/shell structure for preventing Co particles from agglomeration is prepared by a simple wet chemistry procedure. At the same time, the N,N-di(phosphonomethyl)iminoacetic acid (DPMIAA) is used to modify the core/shell surface. High dielectric permittivity and low leakage current are achieved for the DPMIAA-modified Co/ZnO core/shell nanoparticle-PVDF composite, which shows good homogeneity, no cracks, and fine mechanical flexibility. (c) 2007 American Institute of Physics.
关键词:
barium-titanate;composites;nanocomposites;performance;capacitors;copolymer;behavior
