Sea urchin-like polystyrene/polyaniline composite microspheres-based flexible pressure sensor fabricated for static and dynamic information recognition
Yi XinXun ZhouLiuyi DingZhixian LiangJie ZhangGuixiang LiXiuzhen HeZhongwei TanXiaohuan YuanJingchun LvShaohui ZhangYuanliang Tang
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Polystyrene
The structure,synthesis,sythetic mechanism,protonation,application of polyaniline and the research advancement of polyaniline composites were comprehensively elaborated, and the study on coal based polyaniline was introduced in detail.In contrast with polyaniline,coal based polyaniline's conductivity drops slightly,but it has cheaper cost and strenghened thermal stability. The novel methods and the new chances for coal's nonfuel application are provided by coal based polyaniline.The coal based polyaniline has a certain extending value.
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The composite mechanisms of wood-polystyrene composite, made of wood particle and discarded foamed polystyrene(PS), was researched by 2 ways of interface characteristic of composite and dynamic mechanical analysis(DMA). The results indicated that PMDI adhesive can be an effective compatible agent between polar wood and nonpolar polystyrene.
Polystyrene
Expanded polystyrene
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Abstract Polyaniline (PAni) films of different intrinsic oxidation states, including emeraldine salt, emeraldine base and leucoemeraldine base, were synthesized. Free‐standing membranes and thin film bilayers of aluminum–polyaniline were fabricated by magnetron sputter deposition of aluminum onto polyaniline films. Aluminum–polyaniline samples were analyzed by transmission electron microscopy (TEM) to investigate the microstructures of specimens, including cross‐sectional TEM micrographs of the metal‐polyaniline interfacial structure not previously reported in the literature. Auger electron spectroscopy (AES) and X‐ray photoelectron spectroscopy (XPS) were employed to study the chemical bonding and interaction between deposited aluminum and polyaniline at the interface. Results indicated that the intrinsic oxidation state of the polyaniline influenced the chemistry of the aluminum–polyaniline interface. Distinct interaction between aluminum and polyaniline in the emeraldine salt‐form was observed. However, there was no evidence of direct interactions of the aluminum with emeraldine base and leucoemeraldine base polyaniline. Copyright © 2005 John Wiley & Sons, Ltd.
Polyaniline nanofibers
Auger electron spectroscopy
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This paper introduced the structure of polyaniline,and three methods for synthesis of water-soluble polyaniline.And the paper summarized the research advances of polyaniline in the field of anticorrosion coatings,and it expatiated the anticorrosive mechanism of polyaniline and application of polyaniline anticorrosive coat.We had expected foreground about polyaniline,and we think that the synthesis of water-soluble polyaniline and the analysis of corrosion theory need to be further studied.
Polyaniline nanofibers
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Abstract The preparation methods of polystyrene (PS) microspheres were reviewed, and the effects of monomer, dispersant, initiator, reaction medium and temperature on the particle size and size distribution of PS microspheres were discussed. Finally, the application prospect of polystyrene microspheres was prospected.
Polystyrene
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Nano-fibrous polyaniline was synthesized on stainless steel electrode in 0.5mol·L~(-1) H_2SO_4 solution by pulse galvanostatic method. The effects of synthetic conditions of pulse galvanostatic method on the electroactivity of polyaniline were investigated. The results show that the electroactivity of polyaniline film strongly depends on the synthetic conditions, such as the ratio of “on time” to “off time”(t_(on)/t_(off)), frequency, monomer concentration, temperature and mean current density. Different electroactivities of polyaniline are caused by different morphologies of polyaniline. The nano-fibrous polyaniline has higher electroactivity than polyaniline with other morphologies. Under the following conditions: mean current density of pulse galvanostatic method 13mA·cm~(-2), t_(on)/t_(off) 1, frequency 200Hz, monomer concentration 0.3mol·L~(-1) and temperature 20℃, nano-fibrous polyaniline film with the highest electroactivity can be obtained.
Polyaniline nanofibers
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Polyaniline nanofibers
Base (topology)
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Microsphere-based assay is a powerful platform to carry out biological detection.The carboxyl functionalized,micro-sized polystyrene microsphere is important carrier in the microsphere-based assay.Mono-dispersed polystyrene particles with the size range of 2.0 μm to 7.0 μm were synthesized by dispersion polymerization.The surface of microspheres was carboxyl functionalized by post-modification.It is demonstrated that the functionalized polystyrene microsphere can be well-coupled with monoclonal antibodies with comparable performance achieved as that of commercial carboxyl polystyrene microspheres(Spherotech Inc.).
Polystyrene
Dispersion polymerization
Suspension polymerization
Surface Modification
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Research on the magnetic thermo-sensitive composite microspheres for controlled release drug carrier was meaningful.Magnetocaloric effect was used to heat the Fe3 O4 /P(NIPAAm-co-Am)composite microspheres,and the heat generation abilities of the composited microspheres in alternation magnetic field(AMF) were investigated in the present work.Results show the resultant Fe3 O4 /P(NIPAAm-co-Am)composite microspheres exhibite excellent superparamagnetic and high heating generation ability.The temperature of the composite microspheres was raised after exposed to AMF,which can stimulate the shrinks of P(NIPAAm-coAm).Furthermore,the temperature raised after exposed to AMF can be adjusted by controlling the concentration of composite microspheres,the magnetic intensity and the frequency of the AMF.
Magnetic refrigeration
Glass microsphere
Superparamagnetism
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In this contribution we extend our previous studies on polyaniline blends to the study of some physical properties of different polyaniline polyvinylchloride (PANI-PVC) blends. Previous data on polyaniline-polyethylene (PANI-PE) blends have revealed a rapid drop of the mechanical features of the blend, as the concentration of polyaniline (PANI) is increased and a relatively slow increase in the electrical conductivity. As the blend has been prepared by mechanical mixing of components, the electrical conductivity decreases in time, probably due to a stabilisation of the blend towards oxygen accompanied by the transformation of the conducting polyaniline (emeraldine salt) into the insulating form of the polyaniline.
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