Preparation of polyaniline–TiO2 composite film with in situ polymerization approach and its gas-sensitivity at room temperature

In this paper, meso-porous MCM-41 was synthesized at room temperature using cationic surfactant cetyltrimethylammonium bromide (CTAB) as the template agent. Then MCM-41/unsatura-ted polyester resin (UPR) materials were prepared by in-situ polymerization with the meso-porous MCM-41. MCM-41/UPR in-situ composites were prepared by roller milling and molding processes. Effects of meso-porous MCM-41 on rheological properties and wear resistance of the MCM-41/UPR composites have been investigated. It is shown that MCM-41 has a diameter in range of 4-5 nm and the pores are highly ordered. MCM-41 can improve the rheological properties and wear resistance of the composites. When MCM-41 content is 2%, the mass abrasion loss is decreased by 37.4%.

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Controllable Synthesis of Functional Polyaniline Nanotubes via a Complex Template

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1120-1121.220 ◽

2015 ◽

Vol 1120-1121 ◽

pp. 220-224

Author(s):

Ying Wang ◽

Dong Hao Sun ◽

Yan Feng Guo

Keyword(s):

Electric Conductivity ◽

Room Temperature ◽

In Situ Polymerization ◽

High Yield ◽

Controllable Synthesis ◽

Order Of Magnitude ◽

Uv Visible ◽

Acid Orange Ii ◽

High Electric Conductivity

Functional Polyaniline (PANI) nanotubes are easily synthesized in high yield by an in situ polymerization using a fibrillar complex of acid orange II (AO II) and FeCl3as a template. During the process, the complex templates help direct the growth of fibrillar PANI on their surfaces, resulting in the formation of composite micro/nanofibers of PANI. After polymerization, by the post-treatment of removing templates in 1.0 M hydrochloric acid solution, PANI nanotubes with azo function and high electric conductivity of PANI are readily fabricated. The PANI nanotubes have about 150nm-300nm in diameter and several microns in length. At room temperature, the electric conductivity of PANI nanotubes is up to 10-1S/cm order of magnitude. The characterizations, including FTIR, UV-visible, XRD and TG, are presented.

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Highly conductive polymer electrolytes prepared by in situ polymerization of vinyl monomers in room temperature molten salts

Electrochimica Acta ◽

10.1016/s0013-4686(99)00330-8 ◽

2000 ◽

Vol 45 (8-9) ◽

pp. 1265-1270 ◽

Cited By ~ 314

Author(s):

Akihiro Noda ◽

Masayoshi Watanabe

Keyword(s):

Polymer Electrolytes ◽

Molten Salts ◽

Room Temperature ◽

In Situ Polymerization ◽

Conductive Polymer ◽

Vinyl Monomers

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IN SITU SYNTHESIS, CHARACTERIZATION AND FREQUENCY DEPENDENT AC CONDUCTIVITY OF POLYANILINE/CoFe2O4 NANOCOMPOSITES

Journal of Advanced Dielectrics ◽

10.1142/s2010135x11000434 ◽

2011 ◽

Vol 01 (03) ◽

pp. 357-362 ◽

Cited By ~ 1

Author(s):

G. D. PRASANNA ◽

H. S. JAYANNA

Keyword(s):

Ac Conductivity ◽

Room Temperature ◽

In Situ Polymerization ◽

In Situ Synthesis ◽

Electron Micrograph ◽

Frequency Range ◽

X Ray Diffraction ◽

Scanning Electron Micrograph ◽

X Ray

The polyaniline (PANI)/ CoFe2O4 nanocomposites were prepared by an In Situ polymerization of aniline in an aqueous solution. The composites were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectrum,thermogravimetric analysis (TGA) and scanning electron micrograph (SEM). The AC conductivity and dielectric properties of these composites were investigated in the frequency range 1 kHz–10 MHz at room temperature. The AC conductivity was found to be constant up to 1 MHz and thereafter it increases steeply and it was observed maximum for the PANI with 60 wt% of CoFe2O4 nanocomposite. At lower frequencies the values of dielectric constant is maximum for pure CoFe2O4 nanoparticles.

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Photocatalytic Degradation PS/B-F Co-Doped Nano-TiO2 Composite

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.726-731.2252 ◽

2013 ◽

Vol 726-731 ◽

pp. 2252-2255

Author(s):

Ying Ying Li ◽

Zhong Hou Zhang ◽

Zhao Lei Wang

Keyword(s):

Surface Morphology ◽

Composite Film ◽

Photocatalytic Degradation ◽

Hot Pressing ◽

In Situ Polymerization ◽

Sol Gel ◽

Xenon Lamp ◽

Gel Method ◽

Co Doped

The B-F codoped nano-TiO2particles powders were prepared by the sol-gel method. The PS/B-F co-doped nano-TiO2composite was synthesized with in situ polymerization. The films of PS/SBS/B-F co-doped nano-TiO2composites were prepared by the hot-pressing machine, and the accelerated photodegradation of films were investigated with a 1000W xenon lamp. The surface morphology and Tg of the films in the process of degradation were detected by SEM and DSC. Results showed that the Tg of PS/SBS/B-F codoped nano-TiO2composite is the lowest of all samples. More and large holes were observed in the surface of PS/SBS/B-F codoped nano-TiO2composite film.

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AN INVESTIGATION ON THE DIELECTRIC PROPERTIES OF POLYANILINE-BASED NANOCOMPOSITE

Modern Physics Letters B ◽

10.1142/s0217984910024055 ◽

2010 ◽

Vol 24 (15) ◽

pp. 1669-1674

Author(s):

J. JIANG ◽

L. H. AI

Keyword(s):

Dielectric Properties ◽

Imaginary Part ◽

Complex Permittivity ◽

Room Temperature ◽

In Situ Polymerization ◽

Dissipation Factor ◽

Frequency Range ◽

The Real ◽

Tan Δ

Polyaniline/ LiNi 0.5 Gd 0.08 Fe 1.92 O 4 nanocomposite was synthesized by an in-situ polymerization of aniline in the presence of LiNi 0.5 Gd 0.08 Fe 1.92 O 4 particles. The dielectric properties of the as-prepared polyaniline-based nanocomposite were investigated using an Agilent E4991A RF Impedance/Material Analyzer at room temperature in the frequency range from 1 MHz to 1 GHz. The real (ε') and imaginary part (ε″) of complex permittivity, and dissipation factor ( tan δ) were found to be frequency-dependent, which decreased with increasing of frequency. It was shown that ε', ε″ and tan δ of the nanocomposite were lower than those of pristine polyaniline. In order to investigate the dielectric process in detail, the complex electric modulii derived from the complex permittivity were analyzed as a function of the frequency.

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The Effect of Components Based on Synchronous Radiation SAXS on Micro-Structure of PI/TiO2 Nano-Composite Film

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.981.851 ◽

2014 ◽

Vol 981 ◽

pp. 851-854

Author(s):

Lei Yao ◽

Jing Hua Yin ◽

Guang You Li ◽

Xiao Xu Liu ◽

Guang Mo

Keyword(s):

Composite Film ◽

In Situ Polymerization ◽

Interface Layer ◽

Nano Particles ◽

Experimental Result ◽

Micro Structure ◽

Nano Composite ◽

Interface Layers ◽

Polymerization Method

In this report, the micro structure of PI/ TiO2films with different components prepared by in-situ polymerization method is researched by XRD, TEM, synchrotron radiation SAXS. Its micro structure characteristics include nano-particles distribution, PI molecule chains spacing and interface layer thickness. The experimental result shows that after doping, particle radius is almost 10nm, and cluster of nano-particles became more serious with increase of components, however, the spacing of PI molecule chains decreases 5.238 Å-4.625 Å. The scattering curves occurs negative deflection in Debye theory, it shows that there are interface layers with thicknesses in the range 0.7nm-2.1nm between nano-particles and composite matrix. Through analyzing the three kinds of micro structure change, it shows that when the component is 15 wt.%, the micro-structure of composite film is the optimal.

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Synthesis and Properties of Polyimide Silica Nanocomposite Film with High Transparent and Radiation Resistance

Nanomaterials ◽

10.3390/nano11030562 ◽

2021 ◽

Vol 11 (3) ◽

pp. 562

Author(s):

Jindong Huang ◽

Guanglu Zhang ◽

Beiping Dong ◽

Juncheng Liu

Keyword(s):

Composite Film ◽

In Situ Polymerization ◽

Wavelength Region ◽

Film Structure ◽

Sio2 Content ◽

Light Transmittance ◽

Elongation At Break ◽

Thermal Stability Of ◽

High Wavelength

In order to prepare flexible glass cover sheet materials suitable for space solar cells, fluorinated diamine 2,2’-bistrifluoromethyl benzidine (TFDB) and fluorinated dianhydride 4,4’ (hexafluoroisopropyl) diphthalic dianhydride (6FDA) as the monomer, polyimide (PI)/SiO2 composite film was synthesized by in situ polymerization, and the influence of coupling agent and SiO2 nanoparticle content on the film structure and properties was studied. The results show that PI synthesized from fluorine-containing monomers has better light transmittance, and the highest transmittance can reach 91.4%. The average visible light transmittance of the composite film decreases with the increase of SiO2 content, and the transmittance of the film decreases less in the high-wavelength region and greatly decreases in the low-wavelength region. The tensile strength and elastic modulus of PI/SiO2 composite film increase with the increase of SiO2 content, first increase and then decrease, reaching the maximum when the content is 10%; while the elongation at break of the composite film gradually increases with the increase of SiO2 content reduce. The thermal stability of PI/SiO2 composite film increases with the increase of SiO2 content. The doping of nano-SiO2 significantly suppresses the influence of irradiation on the mechanical properties of the film.

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AC CONDUCTIVITY AND DIELECTRIC STUDIES OF POLYPYRROLE-PAPAIN COMPOSITE

International Journal of Research -GRANTHAALAYAH ◽

10.29121/granthaalayah.v7.i8.2019.681 ◽

2019 ◽

Vol 7 (8) ◽

pp. 332-338

Author(s):

Pandey Munish ◽

Badlani Richa

Keyword(s):

Dielectric Constant ◽

Room Temperature ◽

In Situ Polymerization ◽

Weight Percent ◽

Oxidizing Agent ◽

Dielectric Studies ◽

Dielectric Constant And Loss ◽

Lcr Meter ◽

Room Temperature Dielectric Constant

Enzyme doped polypyrrole polymer were synthesized by in situ polymerization where ferric chloride works as an oxidizing agent. The different weight percent of papain was added at the time of polymerization. The polypyrrole-papain composite of various composition was analyzed for its dielectric and a. c. conductivity by using LCR meter at room temperature. Dielectric constant and loss decreases, with escalation in frequency. The variation in dielectric constant and dielectric loss was also noted with change in papain percentage in pyrrole.

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