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.

Novel Enhanced Acrylic Denture Base Powder by Incorporating with PMMA-Modified Ag/NaZr2(PO4)3 through In Situ Suspension Polymerization

2015 ◽  
Vol 815 ◽  
pp. 342-347
Author(s):  
Jun Jun Du ◽  
Hao Yu ◽  
Mei Fang Zhu
Keyword(s):  
Suspension Polymerization ◽  
Flexural Properties ◽  
Powder Size ◽  
Gravimetric Analysis ◽  
Water Contact ◽  
Denture Base ◽  
Base Powder ◽  
Base Resin ◽  
Denture Base Resin

A kind of novel antibacterial denture base powder incorporated with PMMA-modified nanoAg/NaZr2(PO4)3(CBD-300) was prepared by in-situ suspension polymerization and the flexural properties of denture base resin was investigated. CBD-300 was silanized by 3-methacryloxy propyl trimethoxyl silane (γ-MPS), and thenγ-MPS-CBD-300 was grafted with poly (methyl methacrylate) (PMMA) to prepare M-CBD-300 which has a good compatibility with the denture base resin. Denture base powders with different addition of M-CBD-300 were prepared by in-situ suspension polymerization. Thermal gravimetric analysis (TGA), Fourier transform infrared spectroscopy (FT-IR) and water contact angle were used to characterize M-CBD-300. The size of denture base powder was observed by optical microscope. Universal testing apparatus and scanning electron microscope (SEM) were used to investigate flexural properties of denture base resin samples. The results showed that the surface of M-CBD-300 was successfully modified by PMMA, and the incorporation of M-CBD-300 leads to increasing of the denture base powder size. The flexural properties of the denture base resin samples prepared with our antibacterial denture base powders were enhanced greatly compared with the blank sample.

Synthesis and Characterization of Caged Phosphate Microparticles Coated with Melamine Resin Based on Composite Properties of Materials

2012 ◽  
Vol 583 ◽  
pp. 236-239
Author(s):  
Xiao Min Fang ◽  
Yuan Qing Xu ◽  
Tao Ding
Keyword(s):  
Flame Retardants ◽  
In Situ Polymerization ◽  
Core Material ◽  
Gravimetric Analysis ◽  
Melamine Resin ◽  
Flame Retarded ◽  
Properties Of Materials ◽  
Loading Amount

In order to develop efficient “three in one” intumesent flame retardants, a novel caged bicyclic phosphate, tris(1-oxo-2,6,7-trioxa-1-phosphorbicyclo[2.2.2]octane methylene-4)phosphate (trimer) as the core material was encapsulated by melamine resin and etherified melamine resin as nitrogen resource respectively via in situ polymerization. The two microencapsulations were characterized by SEM, XPS and thermal gravimetric analysis. When they were used as intumesent flame retardant in epoxy they all exhibit good properties. With 20wt% loading amount the flame-retarded epoxy all can pass UL94 V-0 rating.

Synthesis and Dielectric Properties of PPy/TiO2 Composite

2015 ◽  
Vol 727-728 ◽  
pp. 38-41
Author(s):  
Hai Tao Zhao ◽  
Rui Ping Liu ◽  
Qiao Wang ◽  
Kai Xin Yang
Keyword(s):  
Dielectric Properties ◽  
In Situ Polymerization ◽  
Average Diameter ◽  
Composite Particles ◽  
Frequency Range

TiO2/PPy composite was prepared by in situ polymerization of pyrrole on TiO2 microparticles. The results show that PPy chains have ordered arrangement to some extent. The average diameter of PPy microspheres is roughly 500 nm. TiO2 microspheres obtained are anatase-type. PPy/TiO2 composite particles are similar to spheres and there is some reunite phenomenon. The tanδe value for TiO2/PPy composite is higher than PPy in the frequency range of 8.2-12.4 GHz and it has achieved a maximum of 0.57 at 11.9 GHz.

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.

Nanowire and Nanotube Materials Prepared from Polymer Fiber Templates

2002 ◽  
Vol 739 ◽  
Author(s):  
Hong Dong ◽  
Verrad Nyame ◽  
Wayne E. Jones
Keyword(s):  
In Situ Polymerization ◽  
Average Diameter ◽  
Porous Ceramics ◽  
Inert Atmosphere ◽  
Electrospinning Process ◽  
Polymer Fibers ◽  
Porous Membranes ◽  
Polymer Fiber ◽  
Electrically Conductive

ABSTRACTThe preparation of well-defined nanomaterials using template methods is well established in the materials literature including porous ceramics, open-framework layered structures and porous membranes. In an effort to prepare thermally and electrically conductive nanowire and nanotube materials, we have recently prepared carbon tubes using polymer fibers produced from an electrostatic, non-mechanical “electrospinning” process as templates. Poly(methyl methacrylate) (PMMA) fibers with average diameter of 150–200 nm were initially fabricated as core materials. The fibers were subsequently coated with a thin layer (20∼50 nm) of conductive polypyrrole (PPy) by in-situ polymerization. Upon high temperature (1000 °C) treatment under inert atmosphere, the PMMA core fibers decomposed completely, followed by carbonization of the PPy wall. The structure of the carbon tubes subsequently produced was demonstrated by SEM and TEM. The carbon tubes were analyzed by infrared, elemental analysis and electron diffraction. The results show that the tubes are largely carbon with a small amount of nitrogen and a relatively low crystallinity.

Synthesis and Characterization of LiFePO4-C/ PANI Composite for Cathode Material of Lithium Ion Battery

2012 ◽  
Vol 585 ◽  
pp. 240-244 ◽  
Author(s):  
Rajeev Sehrawat ◽  
Anjan Sil
Keyword(s):  
Composite Material ◽  
In Situ Polymerization ◽  
Active Material ◽  
Lithium Ion ◽  
Chain Structure ◽  
Raw Material ◽  
Precipitation Method ◽  
Gravimetric Analysis ◽  
Oxidizing Agents

In-situ polymer coated LiFePO4-C composite material has been synthesized using different oxidizing agents viz. (NH4)2S2O8, KMnO4 and K2Cr2O7. Polyaniline (PANI) with chains having diameter ≤ 200 nm have been grown separately by self oxidation process of aniline monomers using the above oxidizing agents. For the synthesis of LiFePO4-C active material, initially raw material FePO4/PANI has been synthesized by chemical precipitation method and added with LiCOOCH3 followed by heat treatment at 700°C under reducing (Ar/H2=90/10) atmosphere for 16 hrs. The synthesized LiFePO4-C material has particle size of about 100 nm. The polymer coated LiFePO4-C composite was synthesized by undergoing in-situ polymerization of aniline monomers added with fixed quantity of LiFePO4-C. XRD analysis reveals formation of single phase pure active material LiFePO4-C and mixed phase containing LiFePO4 to FePO4 for polymer coated LiFePO4-C composite. The carbon content in the LiFePO4-C was estimated to be 5 wt%, however, the PANI content in the composites was different with different oxidizing agent. These PANI contents in the composites synthesized with (NH4)2S2O8, KMnO4 and K2Cr2O7 are 14, 15 and 17 wt% respectively which have been estimated by thermal gravimetric analysis (TGA) of the materials. Electrical conductivities of the composite materials were determined by Impedance spectroscopy method. The composite material synthesized with (NH4)2S2O8 has higher conductivity compared to those synthesized with KMnO4 and K2Cr2O7. The higher conductivity of the composite synthesized with (NH4)2S2O8 may be attributed to the presence of partial chain structure in polymer coating as seen by microstructural observations on the composite.

scholarly journals In situ polymerization of polypyrrole on cotton fabrics as flexible electrothermal materials

2019 ◽  
Vol 14 ◽  
pp. 155892501982744 ◽  
Author(s):  
Juan Xie ◽  
Wei Pan ◽  
Zheng Guo ◽  
Shan Shan Jiao ◽  
Ling Ping Yang
Keyword(s):  
Thermal Stability ◽  
Tensile Strength ◽  
In Situ Polymerization ◽  
Thermo Gravimetric Analysis ◽  
Cotton Fabrics ◽  
Morphological Properties ◽  
Polymerization Process ◽  
Maximum Temperature ◽  
Gravimetric Analysis

Polypyrrole/cotton composites have substantial application potential in flexible heating devices due to their flexibility, high conductivity, and thermal stability. In this context, a series of flexible polypyrrole/cotton fabrics were intrinsically prepared using in situ polymerization process with the different Py/FeCl3 concentration ratios. To investigate their structural and morphological properties, thermal stability, tensile strength, conductivity, and heat-generating property, the composite fabrics were subjected to Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction, thermo-gravimetric analysis, mechanical properties, and resistivity measurements. The results showed that polypyrrole/cotton fabrics exhibited a low resistivity of 0.37 Ω cm. Temperature–time curve showed that temperature of the polypyrrole/cotton fabrics increased very quickly from room temperature to a steady-state maximum temperature of 168.3°C within 3 min at applied voltage of 5 V. Tensile strength of polypyrrole/cotton composites reached to 58 MPa, which far surpassed raw cotton fabrics. Therefore, polypyrrole/cotton fabrics have exhibited high electrical, thermal properties, and mechanical strength, which can be utilized as an ideal flexible heating element.

Polyaniline/nano-in2O3 Composites Used as a Sensitive Material to NH3

2011 ◽  
Vol 239-242 ◽  
pp. 322-327 ◽  
Author(s):  
Ying Nan Xie ◽  
Zheng Hai Shi ◽  
Jian Lian Liu
Keyword(s):  
In Situ Polymerization ◽  
Average Diameter ◽  
Environmental Stability ◽  
Sensitive Material ◽  
Long Term Stability ◽  
Degree Of Crystallization ◽  
High Degree ◽  
Sulphosalicylic Acid

In presence of nano-In2O3 which were synthesised via a reverse microemulsion, Polyaniline/nano-In2O3 composites were prepared by in-situ polymerization of aniline in 5-sulphosalicylic acid(SSA) aqueous solution. They were characterized by means of TEM, XRD and FTIR.. TEM and XRD showed that the average diameter of In2O3 particles was 15nm with a narrow size distribution and with a high degree of crystallization. The FTIR suggested that the structure of PAn-SSA was not be changed by the mixture of In2O3. Sensitivity of the composites to 100~1000ppm NH3 were studied, the results reveal that polyaniline/nano-In2O3 composites have short response time and good reversibility, the gas sensitive of composites to NH3 under 300ppm increased linearly with the increasing concentration of NH3 and decreased with the increasing of In2O3 concentration. Long-term stability of polyaniline/nano-In2O3 composites were also investagated, it can be concluded that the organic-inorganic hybrid materials have better environmental stability.

Preparation of PANI/PET Fabric and its Antistatic Property Study

2012 ◽  
Vol 441 ◽  
pp. 309-314
Author(s):  
Jun Li ◽  
Lan Wang ◽  
Jun Xiong Lin
Keyword(s):  
In Situ Polymerization ◽  
Orthogonal Experiment ◽  
Monomer Concentration ◽  
Polyester Fabric ◽  
Optimum Process ◽  
Pet Fabric ◽  
Conductive Fabric ◽  
Hcl Concentration ◽  
Polymerization Method

PANI/PET composite fabric was synthesized at the surface of polyester fabric by in-situ polymerization method. The optimum preparation process was determined by unvaried analyses and orthogonal experiment. Meanwhile the performance of PANI/PET composite conductive fabric was characterized. The results showed that the optimum process of PANI/PET composite conductive fabric was as follows: PANI monomer concentration was 0.1mol/L, n [(NH4)2S2O8]:n (An) was 1:1, HCl concentration was 0.5 mol/L, the reaction time was 2 h and the reaction temperature was at 20°C. Under this condition, the half-life of the PANI/PET composite fabric was 0.21 s. At the same time, the breaking tenacity of PANI/PET composite fabric was better than that of polyester fabric

Research on the Reaction Condition and Process of Microcapsules via In Situ Polymerization

2011 ◽  
Vol 224 ◽  
pp. 99-103 ◽  
Author(s):  
Chang Zheng Xin ◽  
Li Na Wang ◽  
Yan Wei Wang ◽  
Xiang An Huang
Keyword(s):  
Electron Microscopy ◽  
Phase Change Materials ◽  
In Situ Polymerization ◽  
Influence Factors ◽  
Average Diameter ◽  
Optical Microscope ◽  
Curing Temperature ◽  
The Core ◽  
Microencapsulated Phase Change Materials

Heat-resistant microencapsulated phase change materials (MPCMs) were prepared via in-situ polymerization, with polyurea used as the shell and low melt-point paraffin wax as the core. Optical microscope and Electron microscopy were employed to evaluate the properties and morphology of the materials. The influence factors on polymerization were discussed. Experimental results indicated that the average diameter of 2.5 μm of particles was gained when the emulsification content was 1%, the time of acidification was 60 minutes and the curing temperature was 70°C.

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