Synthesis, Characterization and Corrosion Protection Properties of Polyaniline/TiO2 Nanocomposite

2011 ◽  
Vol 399-401 ◽  
pp. 2083-2086
Author(s):  
Lian Zhong ◽  
Yan Hua Wang ◽  
Yong Hong Lu
Keyword(s):  
Strong Interaction ◽  
In Situ Polymerization ◽  
Polymer Nanocomposite ◽  
Aniline Monomer ◽  
Nano Tio2 ◽  
Conductive Polyaniline ◽  
Anticorrosion Performance ◽  
Protective Performance ◽  
Epoxy Paint

In this study, conductive polyaniline (PANi)–titania (TiO2) nanocomposites with core–shell structure were prepared and their anticorrosion properties were investigated. PANi/nano-TiO2 composite were prepared by in situ polymerization of aniline monomer in the presence of TiO2 nanoparticles. The morphology and structure of the polymer nanocomposite was characterized by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR), respectively. SEM and FTIR spectra measurements show that PANi and TiO2 nanoparticles are not simply blended or mixed up, and a strong interaction exists at the interface of nano-TiO2 and PANi. From the anticorrosion investigation in 3.5%NaCl, it is revealed that the protective performance of epoxy paint containing PANi/nano-TiO2 composite is significantly improved than PANi or a mixture of polyaniline and nano-TiO2. From the improved anticorrosion performance, it also indicate that PANi and TiO2 nanoparticles are not simply blended or mixed up, the strong interaction exists at the interface of PANi and nano-TiO2. It is the strong interaction that results in the coordinated effect and more excellent anticorrosion performance.

scholarly journals Ultraflexible and Mechanically Strong Polymer/Polyaniline Conductive Interpenetrating Nanocomposite via In Situ Polymerization of Vinyl Monomer

Polymers ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 2159
Author(s):  
Haihua Wang ◽  
Xiaojing Wu ◽  
Xuan Qin ◽  
Guiqiang Fei ◽  
Liyu Sun ◽  
...  
Keyword(s):  
Tensile Strength ◽  
In Situ Polymerization ◽  
Conductive Polymer ◽  
High Strength ◽  
Polymer Nanocomposite ◽  
Vinyl Monomer ◽  
Elongation At Break ◽  
Conductive Polyaniline ◽  
High Flexibility

Simultaneous enhancement of conductivity and mechanical properties for polyaniline/polymer nanocomposite still remains a big challenge. Here, a reverse approach via in situ polymerization (RIP) of vinyl monomers in waterborne polyaniline dispersion was raised to prepare conductive polyaniline (GPANI)/polyacrylate (PMB) interpenetrating polymer (GPANI-PMB) nanocomposite. GPANI/PMB physical blend was simultaneously prepared as reference. The conductive GPANI-PMB nanocomposite film with compact pomegranate-shape morphology is homogeneous, ultraflexible and mechanically strong. With incorporating a considerable amount of PMB into GPANI via the RIP method, only a slight decrease from 3.21 to 2.80 S/cm was detected for the conductivity of GPANI-PMB, while the tensile strength significantly increased from 25 to 43.5 MPa, and the elongation at break increased from 40% to 234%. The water absorption of GPANI-PMB3 after 72 h immersion decreased from 24.68% to 10.35% in comparison with GPANI, which is also higher than that of GPANI/PMB. The conductivity and tensile strength of GPANI-PMB were also much higher than that of GPANI/PMB (0.006 S/cm vs. 5.59 MPa). Moreover, the conductivity of GPANI-PMB remained almost invariable after folding 200 times, while that of GPANI/PMB decreased by almost half. This RIP approach should be applicable for preparing conventional conductive polymer nanocomposite with high conductivity, high strength and high flexibility.

Preparation of ZnO/PANI Nanocomposite and Study on its Photocatalytic Properties

2013 ◽  
Vol 716 ◽  
pp. 368-372
Author(s):  
Hui Xu ◽  
Jian Wei Xing
Keyword(s):  
Charge Separation ◽  
In Situ Polymerization ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Aniline Monomer ◽  
First Order ◽  
Photocatalytic Activities ◽  
Recombination Centers ◽  
Kinetics Of

Polyaniline (PANI)/zinc oxide (ZnO) nanocomposites have been synthesized by in-situ polymerization of aniline monomer with ZnO nanomaterials. The PANI/ZnO nanocomposites were used as photocatalyst in the photodegradation of methylene blue dye (MB) molecules in aqueous solution. The results showed that PANI/ZnO nanocomposite greatly enhanced photocatalytic activities compared with pristine polyaniline might due to high photoexcited electronhole pairs charge separation. The photocatalytic activities of PANI/ZnO nanocomposites increased with increasing ZnO content, however, further increasing ZnO content over 50% induced the formation of more agglomerates, which could act as recombination centers of photoexcited electronhole pairs, leading to decreased photocatalytic activity. The kinetics of photodegradation of MB dye using PANI/ZnO(ZnO content 50 % ) nanocomposites photocatalyst was found to be of the first order.

scholarly journals A Three-Dimensional Porous Conducting Polymer Composite with Ultralow Density and Highly Sensitive Pressure Sensing Properties

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Jin-Dong Su ◽  
Xian-Sheng Jia ◽  
Jin-Tao Li ◽  
Tao Lou ◽  
Xu Yan ◽  
...  
Keyword(s):  
Electrical Resistance ◽  
In Situ Polymerization ◽  
Three Dimensional ◽  
Aniline Monomer ◽  
Pressure Sensing ◽  
Sensing Properties ◽  
Before And After ◽  
Different Temperatures ◽  
Voltage Current Characteristic

An ultralight conducting polyaniline/SiC/polyacrylonitrile (PANI/SiC/PAN) composite was fabricated by in situ polymerization of aniline monomer on the surface of fibers in SiC/PAN aerogel. The SiC/PAN aerogel was obtained by electrospinning, freeze-drying, and heat treatment. The ingredient, morphology, structure, and electrical properties of the aerogel before and after in situ polymerization were investigated by X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), and voltage-current characteristic measurement. The thermostability of PANI/SiC/PAN composite was investigated by thermogravimetric analysis (TGA) and electrical resistance measured at different temperatures. The density of the PANI/SiC/PAN composite was approximately 0.211 g cm−3, the porosity was 76.44%, and the conductivity was 0.013 S m−1. The pressure sensing properties were evaluated at room temperature. The electrical resistance of as-prepared sample decreased gradually with the increase of pressure. Furthermore, the pressure sensing process was reversible and the response time was short (about 1 s). This composite may have application in pressure sensor field.

Anchoring conductive polyaniline on the surface of expandable polystyrene beads by swelling-based and in situ polymerization of aniline method

2011 ◽  
Vol 172 (1) ◽  
pp. 564-571 ◽  
Author(s):  
Juntao Yan ◽  
Chunlei Wang ◽  
Yan Gao ◽  
Zaihang Zheng ◽  
Shuangling Zhong ◽  
...  
Keyword(s):  
In Situ Polymerization ◽  
Polystyrene Beads ◽  
Expandable Polystyrene ◽  
Conductive Polyaniline

Properties of Conductive Polyaniline/Boron Carbide Composites

2012 ◽  
Vol 557-559 ◽  
pp. 417-420
Author(s):  
Hui Huang ◽  
Ju Kang Li ◽  
Zhong Cheng Guo
Keyword(s):  
Thermal Stability ◽  
Boron Carbide ◽  
In Situ Polymerization ◽  
Pure Pani ◽  
Conductivity Measurements ◽  
Maximum Conductivity ◽  
B4c Particles ◽  
Conductive Polyaniline ◽  
Thermal Stability Of

Conductive polyaniline/boron carbide (PANI/B4C) composites have been synthesized by in-situ polymerization of aniline in the presence of B4C particles. The structure and thermal stability of obtained composites were characterized by FTIR, XRD and TGA. The results showed that PANI and B4C particles were not simply blended, and a strong interaction existed at the interface of B4C and PANI. In the PANI/B4C composite, the degree crystalline of PANI increased and diffraction pattern of B4C was all but of amorphous. And that the composites were more thermally stable than that of the pure PANI. Electrical conductivity measurements indicated that the conductivity of PANI/B4C composites was much higher than that of the pure PANI and the maximum conductivity obtained was 35.6 S•cm-1 at 20 wt% of B4C.

scholarly journals Facile Preparation, Characterization, and Highly Effective Microwave Absorption Performance of CNTs/Fe3O4/PANI Nanocomposites

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Deqing Zhang ◽  
Xiuying Yang ◽  
Junye Cheng ◽  
Mingming Lu ◽  
Bin Zhao ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
In Situ Polymerization ◽  
Weight Ratio ◽  
Peak Frequency ◽  
Aniline Monomer ◽  
Transmission Electron ◽  
Absorption Performance ◽  
Additional Process ◽  
5 Ghz

A facile method has been developed to synthesize light-weight CNTs/Fe3O4/PANI nanocomposites. The formation route was proposed as the coprecipitation of Fe2+and Fe3+and an additional process of in situ polymerization of aniline monomer. The structure and morphology of CNTs/Fe3O4/PANI were characterized by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared (FTIR) spectroscopy. The TEM investigation shows that the CNTs/Fe3O4/PANI nanocomposites exhibit less intertwined structure and that many more Fe3O4particles are attached homogeneously on the surface of CNTs, indicating that PANI can indeed help CNTs to disperse in isolated form. The wave-absorbing properties were investigated in a frequency of 2–18 GHz. The results show that the CNTs/Fe3O4/PANI nanocomposites exhibit a super absorbing behavior and possess a maximum reflection loss of −48 dB at 12.9 GHz, and the bandwidth below −20 dB is more than 5 GHz. More importantly, the absorption peak frequency ranges of the CNTs/Fe3O4/PANI composites can be tuned easily by changing the wax weight ratio and thickness of CNTs/Fe3O4/PANI paraffin wax matrix.

Preparation and Characterization of Conductive Polyaniline/Zirconia Nanoparticles Composites

2011 ◽  
Vol 221 ◽  
pp. 302-307 ◽  
Author(s):  
Hui Huang ◽  
Zhong Cheng Guo ◽  
Wei Zhu ◽  
Fa Chuang Li
Keyword(s):  
In Situ Polymerization ◽  
Thermo Gravimetric Analysis ◽  
Zro2 Nanoparticles ◽  
Gravimetric Analysis ◽  
X Ray Diffraction ◽  
Thermo Gravimetric ◽  
Maximum Conductivity ◽  
Conductive Polyaniline

Conductive polyaniline/zirconia (PANI/ZrO2) composites have been synthesized by in-situ polymerization of aniline in the presence of ZrO2 nanoparticles. The structure and morph- ology of composites were characterized by Fourier-transform infrared spectra (FTIR), thermo- gravimetric analysis (TGA), X-ray diffraction (XRD) and scanning electron microscope (SEM). The conductivity was also investigated. The results showed that PANI and ZrO2 nanoparticles were not simply blended, and a strong interaction existed at the interface of ZrO2 and PANI. It was probably a composite at molecular level. The composites were more thermal stability than that of the pure PANI. XRD analyses confirmed PANI deposited on the surface of ZrO2 nanoparticles had no effect on crystallization performance of ZrO2 nanoparticles. Electrical conductivity measurements indicated that the conductivity of PANI/ZrO2 composites was much higher than that of PANI and the maximum conductivity obtained was 11.27S/cm at 15 wt% of ZrO2 nanoparticles.

Preparation of Low-K Fluorinated Polyimide/Phlogopite Nanocomposites

2008 ◽  
Vol 47-50 ◽  
pp. 987-990
Author(s):  
Yi He Zhang ◽  
Qing Song Su ◽  
Li Yu ◽  
Li Bing Liao ◽  
Hong Zheng ◽  
...  
Keyword(s):  
In Situ Polymerization ◽  
Layered Silicate ◽  
Polymer Nanocomposite ◽  
Nanocomposite Films ◽  
Polymerization Process ◽  
Ultrasonic Dispersion ◽  
Thermal Stabilities ◽  
Fluorinated Polyimide ◽  
Polyimide Matrix

Phlogopite with layered silicate structure had been firstly chemically modified via an in situ intercalation method, and phlogopite-polymer nanocomposite films were prepared from 2,2'-bis (3,4-dicarboxyphenyl) hexafluropropane dianhydride (6FDA) and oxydimethyl aniline (ODA) in N,N-dimethylacetamide as a solvent by using in-situ polymerization process combined with ultrasonic dispersion and multi-step curing. The structure of phlogopite minerals and its polymer nanocomposites were characterized by X-ray diffraction (XRD) and infrared spectra (FTIR) respectively. The experimental results indicated that the phlogopites with layered nanostructure had lost their ordered structure and had been exfoliated or intercalated. Thereafter, they were dispersed randomly in the polyimide matrix. The dependence of dielectric properties and thermal stabilities of the nanocomposite films on the phlogopite content and frequency were studied.

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