Fabrication and properties of polyaniline/ramie composite fabric based on in situ polymerization

2021 ◽  
pp. 096739112110283
Author(s):  
Guizhen Ke ◽  
Mofasser Haque Chowdhury ◽  
Xinya Jin ◽  
Wenbin Li
Keyword(s):  
Electrical Conductivity ◽  
In Situ Polymerization ◽  
Ph Value ◽  
Full Range ◽  
Decomposition Temperature ◽  
Ftir Analysis ◽  
Mechanical Measurement ◽  
Conductive Polyaniline ◽  
Color Depth

Polyaniline (PANI) is one of the most important conducting polymer and has been widely used in various fields for its tunable electrical conductivity. In this manuscript, conductive polyaniline/ramie fabrics were developed by in situ polymerization and characterized. The effect of aniline content, polyetherimide (PEI) pretreatment, padding and the color depth (K/S value) on electrical resistivity was analyzed. The result showed that electrical conductivity was increased with the increase of aniline (ANI) contents. PEI pretreatment and padding method improved the conductivity of the fabric significantly. The result of K/S value was reversely consistent with the conductivity. Both scanning electron microscope (SEM) and Fourier transform infrared spectroscopy (FTIR) analysis confirmed that polyaniline particles were successfully deposited on the surface of the ramie fabrics. Thermal degradation (TG) measurement showed that polyaniline (PANI) polymerization decreased the onset decomposition temperature. Mechanical measurement showed that pretreatment process reduced the tensile strength of conductive ramie fabrics by 30%. K/S value in full range showed that the color of PANI/ramie fabric was sensible to pH value. Contact angle (CA) measurement disclosed the conductive PANI/ramie fabric was hydrophobic and this hydrophobicity was stable to the change of pH value. The obtained PANI/ramie fabrics can be used as potential conductive multifunctional textiles.

Preparation of Polyaniline @ Polypyrrole Conductive Composite via In Situ Polymerization

2013 ◽  
Vol 562-565 ◽  
pp. 1137-1142
Author(s):  
Hui Xia Feng ◽  
Bing Wang ◽  
Lin Tan ◽  
Na Li Chen
Keyword(s):  
Electron Microscopy ◽  
Electrical Conductivity ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
In Situ Polymerization ◽  
Conductive Composite ◽  
The Core ◽  
Novel Method ◽  
Scanning Electron

We prepared the polyaniline@polypyrrole (PAn@PPy) conductive composite by a novel method. The struction like Pre-prepared PAn as the core and PPy as the shell for the composite has been prepared by in-situ polymerization. The PAn@PPy conductive composite presents an electrical conductivity of 12.5 S/cm, which is much higher than pure PAn. The synthesized polymer composites are characterized by Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM) and Thermogravimetric analysis (TG). The results indicated that PPy successfully grafted on PAn and the heat resistance of nanocomposite is remarkably increased.

Characterization of Polystyrene (PS)/Organomodified Layered Double Hydroxide (OLDH) Nanocomposites Prepared by In Situ Polymerization

2011 ◽  
Vol 410 ◽  
pp. 164-167 ◽  
Author(s):  
Balakrushna Sahu ◽  
G. Pugazhenthi
Keyword(s):  
In Situ Polymerization ◽  
Sodium Dodecyl ◽  
Decomposition Temperature ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
Stretching Vibration ◽  
Xrd Patterns ◽  
Co Precipitation ◽  
Double Hydroxide

PS/LDH nanocomposites were synthesized via in-situ polymerization technique using styrene monomer with toluene as a solvent. A series of LDHs (Mg-Al, Co-Al, Ni-Al, Cu-Al, Cu-Fe and Cu-Cr LDHs) was first prepared from their nitrate salts by co-precipitation method. The above prepared, pristine LDHs were organically modified using sodium dodecyl sulfate (SDS) to obtain organomodified LDHs (OLDH). Then, PS nanocomposites containing 5 wt.% OLDHs were prepared by in-situ polymerization method. The structural and thermal properties of LDHs and corresponding nanocomposites were characterized by X-Ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA). The absence of OLDH peak (003) in the XRD patterns of PS/OLDH nanocomposite confirms the formation of exfoliated nanocomposites. The presence of sulfate groups in the modified LDHs is confirmed by FTIR analysis. The appearance of new peaks in the FTIR spectra in the region of 3400-3500 cm-1, 1670-1680 cm-1and 1200-1260 cm-1for O-H stretching, H-O-H vibration and stretching vibration of sulfate, respectively indicate the existence of LDHs in the PS/OLDH nanocomposites. The entire exfoliated PS/OLDH nanocomposites exhibit enhanced thermal stability relative to the pure PS. When 50% weight loss is selected as point of comparison, the decomposition temperature of nanocomposites is about 3-5oC higher than that of pure PS.

Exfoliated graphite nanoplatelets/poly(arylene ether nitrile) nanocomposites

2016 ◽  
Vol 29 (10) ◽  
pp. 1121-1129 ◽  
Author(s):  
Yingqing Zhan ◽  
Zhihang Long ◽  
Xinyi Wan ◽  
Yi He ◽  
Xiaobo Liu
Keyword(s):  
Electron Microscopy ◽  
Tensile Strength ◽  
In Situ Polymerization ◽  
Decomposition Temperature ◽  
Exfoliated Graphite ◽  
Graphite Nanoplatelets ◽  
Initial Decomposition Temperature ◽  
Arylene Ether ◽  
Exfoliated Graphite Nanoplatelets

In this work, we demonstrate a method for synthesis of exfoliated graphite nanoplatelets (xGnPs)/poly(arylene ether nitrile) (PEN) nanocomposites via an efficient in situ polymerization. The GnPs were treated by the ultrasonic bath to reduce the layers of the GnPs, where the PEN were intercalated subsequently. Therefore, the dispersion of xGnP in the PEN resin was enhanced through in situ polymerization, which was characterized and confirmed by scanning electron microscopy, transmission electron microscopy, and Fourier transform infrared spectroscopy. It was found that the tensile strength and modulus were greatly enhanced with the addition of xGnP. For 2.5 wt% of xGnP-reinforced PEN, the tensile strength and modulus were increased to 115 MPa and 3121 MPa, respectively. Owing to the well dispersion of xGnP, the low rheological percolation of 2.5 wt% for PEN nanocomposites was obtained. Besides, with 1 wt% of xGnP, the corresponding initial decomposition temperature ( Tin) increased from 451°C in pure PEN to 470°C. The addition of xGnP showed enhanced thermal stability of PEN nanocomposites, which demonstrated a promising method for preparing advanced polymer-based nanocomposites.

An electrically conductive hybrid polyaniline/silver-coated polyester fabric for smart applications

2019 ◽  
Vol 50 (5) ◽  
pp. 754-769 ◽  
Author(s):  
Mostafa Youssefi ◽  
Fereshteh Motamedi
Keyword(s):  
Electrical Conductivity ◽  
In Situ Polymerization ◽  
Silver Ions ◽  
Average Diameter ◽  
Polyester Fabric ◽  
Gravimetric Analysis ◽  
Water Contact ◽  
Coated Fabric ◽  
Coated Fabrics

A highly conductive polyester fabric was fabricated by the two-step successive in situ polymerization of aniline. This was followed by silver electroless plating on the surface of the fabric. Also, a silver electroless-plated fabric and a PANI-coated fabric were prepared by the in situ chemical polymerization of aniline. The electrical conductivity measurements, scanning electron microscopy, thermal gravimetric analysis, water contact angle measurements, wide angle X-ray diffraction, Fourier transform infrared spectroscopy, and air permeability tests were conducted on the coated fabrics. It was found that the surface of the hybrid PANI/silver-coated fabric was coated with granular silver particles having the average diameter of 1.3 µm. Besides, the amount of the reduced silver on the surface of the fabric was much higher than that in the silver electroless-plated fabric. The emeraldine form of PANI was oxidized to pernigraniline and the silver ions were reduced to silver metal particles. The hybrid PANI/silver-coated fabric showed the electrical conductivity of 2.63 × 103 Scm−1; so, it could be applied in many smart wearable applications.

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

Electrical Properties and Morphological Structures of UHMWPE/PANI Composite Fibers Doped with Hydrochloric Acid

2013 ◽  
Vol 796 ◽  
pp. 166-171 ◽  
Author(s):  
Jian Han Hong ◽  
Zhi Juan Pan ◽  
Min Li ◽  
Mu Yao
Keyword(s):  
Mechanical Property ◽  
Electrical Conductivity ◽  
Hydrochloric Acid ◽  
In Situ Polymerization ◽  
Breaking Strength ◽  
Composite Fiber ◽  
Pani Film ◽  
Composite Fibers ◽  
Pani Composite

UHMWPE/PANI composite fibers were prepared by in-situ polymerization. The effects of concentration of hydrochloric acid on the electrical conductivity and surface morphology of the composite fiber were investigated, and the chemical construction and mechanical property were also studied. The results indicated that composite fibers prepared by in-situ polymerization were electrical conductive due to the conductive PANI film which adheres to the surface of matrix fibers, and the electrical conductivity reached 10-1S/cm. The roughness increased, and the electrical conductivity of UHMWPE/PANI composite fiber increased at the first and then decreased with the increase of concentration of HCl, the highest electrical conductivity obtained with the concentration of HCl of 0.7mol/L. The FTIR curves indicated that the composite fiber was a blending system of matrix fiber and PANI, and the chemical construction of matrix fiber was unchanged. The fibers breaking strength increased a little and breaking elongation unchanged basically after the conduction treatment.

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.

The Preparation of Microcapsules Used for Self-Healing Composites

2011 ◽  
Vol 233-235 ◽  
pp. 2319-2322 ◽  
Author(s):  
Ru Tian ◽  
Yu Dong Zheng ◽  
Xin Liang ◽  
Zhang Ming Zhou ◽  
Xiao Li Fu ◽  
...  
Keyword(s):  
In Situ Polymerization ◽  
Ph Value ◽  
Condensation Reaction ◽  
Formaldehyde Resin ◽  
Self Healing ◽  
Mass Ratio ◽  
Melamine Formaldehyde ◽  
Stirring Rate ◽  
The Stability

Microcapsules were prepared by in situ polymerization of melamine-formaldehyde resin to form shell over oxygen resin droplets. Stirring rate, temperature, pH value as well as mass ratio of shell and core are the main parameters affecting the stability of microcapsules. High stirring rate leads to small size of microcapsules. The temperature influences the speed of the reaction and the morphology. The pH value decides whether the condensation reaction can take place. The size of microcapsules is about 15-61um.

scholarly journals Low—Permittivity Copolymerized Polyimides with Fluorene Rigid Conjugated Structure

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6266
Author(s):  
Xiaodi Dong ◽  
Mingsheng Zheng ◽  
Baoquan Wan ◽  
Xuejie Liu ◽  
Haiping Xu ◽  
...  
Keyword(s):  
In Situ Polymerization ◽  
Signal Propagation ◽  
Dielectric Materials ◽  
Propagation Delay ◽  
Decomposition Temperature ◽  
Thermal Decomposition Temperature ◽  
Molecular Weights ◽  
Low Permittivity ◽  
Crosstalk Signal

As the miniaturization of electronic appliances and microprocessors progresses, low-permittivity interlayer materials are becoming increasingly important for their suppression of electronic crosstalk, signal propagation delay and loss, and so forth. Herein, a kind of copolyimide (CPI) film with a “fluorene” rigid conjugated structure was prepared successfully. By introducing 9,9-Bis(3-fluoro-4-aminophenyl) fluorene as the rigid conjugated structure monomer, a series of CPI films with different molecular weights were fabricated by in situ polymerization, which not only achieved the reduction of permittivity but also maintained excellent thermodynamic stability. Moreover, the hydrophobicity of the CPI film was also improved with the increasing conjugated structure fraction. The lowest permittivity reached 2.53 at 106 Hz, while the thermal decomposition temperature (Td5%) was up to 530 °C, and the tensile strength was ≥ 96 MPa. Thus, the CPI films are potential dielectric materials for microelectronic and insulation applications.

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