Acid-Assisted One-Step In-Situ Polymerization Synthesis of PANI/α-Fe2O3/β-FeOOH Composites and Its Formation Mechanism

2020 ◽  
Vol 30 (11) ◽  
pp. 4452-4458
Author(s):  
Runhua Qin ◽  
Lingyun Hao ◽  
Juan Li
Keyword(s):  
Formation Mechanism ◽  
In Situ Polymerization ◽  
One Step

scholarly journals Functionality of TERGO Powders during the Synthesis of PANI-Based Composites for Electrical Devices

2019 ◽  
Vol 2019 ◽  
pp. 1-17
Author(s):  
M. A. Domínguez-Crespo ◽  
A. B. López-Oyama ◽  
A. M. Torres-Huerta ◽  
A. R. Hernández-Basilio ◽  
D. Palma-Ramírez ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Fine Particles ◽  
In Situ Polymerization ◽  
Hybrid Composites ◽  
Physical Interaction ◽  
Step Potential ◽  
Transmission Electron ◽  
Electrochemically Reduced Graphene Oxide ◽  
One Step

In this work, hybrid composites were prepared using polyaniline (PANI) and electrochemically reduced graphene oxide (ERGO) by in situ polymerization. ERGO powders were obtained by a two-way route, Hummer’s method, and one-step potential (−2 V) followed by annealing process at 400°C (TERGO powders): different quantities of TERGO fine particles (10, 20, and 30 wt%) were added to the in situ PANI polymerization in order to produce the hybrid composites. The morphology and structure of the PANI/TERGO compounds were characterized by Raman spectroscopy, ultraviolet-visible spectroscopy (UV-Vis), X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Thermal treatment of ERGO powders pointed out high-defect surfaces with a wrinkle-type morphology (ID/IG ratio~0.90). The emeraldine phase of PANI was obtained with a maximum value of 61%, which decreases with the amount of TERGO powders. It is also seen that composites displayed a combined morphology between PANI matrix and TERGO powders, confirming a physical interaction between both morphologies. The amount of TERGO particles into the polymeric matrix also modifies the sample microstructure from a semispherical shape to extend sheets, where PANI is sandwiched between TERGO layers. Electrical conductivity of composites slightly increases independent of the TERGO amount (30 S/m and 39 S/m) due to the rough TERGO surface that conditioned the homogeneous nucleation of a large amount of polymer (PANI) reducing the area to move the electrical charge.

Preparation of Epoxy Resin/Montmorillonite Composites by Monomer Insert In Situ Polymerization

2010 ◽  
Vol 178 ◽  
pp. 236-241
Author(s):  
Jing Xie ◽  
Shang Yue Shen ◽  
Yu Xia Luo ◽  
Meng Meng Zhang ◽  
Ying Chen
Keyword(s):  
Tensile Strength ◽  
Glass Transition ◽  
Transition Temperature ◽  
Epoxy Resin ◽  
In Situ Polymerization ◽  
Raw Materials ◽  
One Step ◽  
Polymerization Method ◽  
Intercalative Polymerization

Epoxy resin/ montmorillonite (EP/MMT) composite was prepared via monomer insert in-situ polymerization. It was shown that the EP/MMT composites could be successfully synthesized from the raw materials only by one step, making it simpler than traditional in-situ intercalative polymerization method. The d001 spacing of montmorillonite was tested by XRD and increased to 4.30nm. The results showed that tensile strength and impact strength were improved by 98.11 and 93.69%, respectively. The glass transition temperature was increased by 17.3 °C.

In situ microcalorimetry study of ZnFe2O4 nanoparticle formation under solvothermal conditions

2015 ◽  
Vol 44 (39) ◽  
pp. 17293-17301 ◽  
Author(s):  
Jun Liu ◽  
Zhaodong Nan ◽  
Shengli Gao
Keyword(s):  
Formation Mechanism ◽  
Solvothermal Method ◽  
Nanoparticle Formation ◽  
Model Sample ◽  
One Step ◽  
Solvothermal Conditions ◽  
In Situ Microcalorimetry

In situ microcalorimetry is used to investigate the formation mechanism for the solvothermal method, where ZnFe2O4 nanoparticles synthesized via a one-step solvothermal method are selected as the model sample.

scholarly journals Modification of Leather Split by In Situ Polymerization of Acrylates

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Weixing Xu ◽  
Jianfei Zhou ◽  
Ya’nan Wang ◽  
Bi Shi
Keyword(s):  
In Situ Polymerization ◽  
Ester Group ◽  
Utility Value ◽  
Straight Chain ◽  
Elongation At Break ◽  
Structures And Properties ◽  
One Step ◽  
Mechanical Strengths ◽  
Chain Ester

Leather split, the byproduct of leather manufacture, possesses low utility value because it has loose weave of collagen fibers and weak mechanical strengths. Herein, a practical and convenient method for increasing strengths of leather split was developed by one-step in situ polymerization. The structures and properties of polyacrylate/leather split composites were systematically investigated. The results suggested the monomers with an α-methyl and a proper straight-chain ester group, such as nBMA, can effectively modify the leather split. For leather split with a thickness of 1.6 mm, the rational processes for preparation of polyacrylate/leather split composite are that monomer and split were stirred in a drum for 4 hours for full permeation and then the split was heated in anaerobic condition at 45°C for 30 min. The tensile strength, tear strength, and elongation at break of the optimized PnBMA/split composite were 18.72 MPa, 62.73 N/mm, and 46.02%, respectively. With these mechanical properties, the split after modification can be well used as leather for making shoes, bags, gloves, and clothing.

Chemical modification of banana starch by the in situ polymerization of ϵ-caprolactone in one step

2016 ◽  
Vol 69 (5-6) ◽  
pp. 1600197 ◽  
Author(s):  
Aurelio Ramírez-Hernández ◽  
Alejandro Aparicio-Saguilán ◽  
José L. Mata-Mata ◽  
Gerardo González-García ◽  
Héctor Hernández-Mendoza ◽  
...  
Keyword(s):  
Chemical Modification ◽  
In Situ Polymerization ◽  
One Step

scholarly journals One-step formation of infrared reflection microsheets via local photo-induced in situ polymerization

RSC Advances ◽  
2019 ◽  
Vol 9 (52) ◽  
pp. 30503-30508
Author(s):  
Jingxing Zhang ◽  
Zekun Guo ◽  
Yancong Feng ◽  
Yao Wang ◽  
Hao Li ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Energy Saving ◽  
Building Materials ◽  
In Situ Polymerization ◽  
Intelligent Building ◽  
Smart Windows ◽  
Infrared Reflection ◽  
One Step

Liquid crystal (LC) smart windows with adjustable reflectivity have been gradually applied in green and intelligent building materials for energy saving needs, but their applications are limited by their fundamental defects.

Fibrillar polyaniline/diatomite composite synthesized by one-step in situ polymerization method

2005 ◽  
Vol 249 (1-4) ◽  
pp. 266-270 ◽  
Author(s):  
Xingwei Li ◽  
Xiaoxuan Li ◽  
Gengchao Wang
Keyword(s):  
In Situ Polymerization ◽  
One Step ◽  
Polymerization Method

Ag–Loaded Polypyrrole/Carbon Nanotube: One-Step In Situ Polymerization and Improved Capacitance

2012 ◽  
Vol 531 ◽  
pp. 35-38 ◽  
Author(s):  
Hong Yu Mi ◽  
You Long Xu
Keyword(s):  
Carbon Nanotube ◽  
In Situ Polymerization ◽  
Conductive Polymer ◽  
Three Dimensional ◽  
High Specific Capacitance ◽  
Electrochemical Reversibility ◽  
Nanotube Composites ◽  
One Step ◽  
Carbon Nanotube Composites

Ternary composites of Ag–loaded polypyrrole/carbon nanotube (Ag–PPy/CNT) are prepared using a one–step in situ polymerization. Ag nanoparticles are uniformly decorated on the core–shell PPy/CNT networks. This approach provides a simple, easily accessible strategy for preparing three–dimensional noble metal–conductive polymer–carbon nanotube composites. Electrochemical properties of Ag–loaded composites are evaluated to understand the effect of Ag on the structure and kinetic process of the composite. Results indicate that the composites have good electrochemical reversibility and high specific capacitance. The specific capacitiance of Ag–PPy/CNT composites are enhanced greatly from 206.7 F g–1 of PPy/CNT composites to 528.6 F g–1 at 3 mA cm–2. This demonstrates that combining nano–sized Ag with supercapacitor materials is very effective in promoting electrochemical performance of materials.

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