Synthesis and characterization of secondary doped polypyrrole/organic modified attapulgite conductive composites

Abstract

Secondary doping method was introduced into fabricating polypyrrole/oganic modified attapulgite conductive composites. The preparation conditions, such as amount of hexadecylpyridinium chloride (CPC, modifying agent), organic modified attapulgite (OATP), and HCl (secondary dopant) have been optimized to get the composites with the highest conductivity. When mCPC/mATP, mOATP/mPy, and nHCl/nSA (SA is sulfamic acid) reaches 0.03, 0.6, and 0.5, respectively, the PPy/OATP composites possess the highest conductivity of 87.59 S cm−1 as well as the highest thermal degradation temperature of 249.29°C. Scanning electron microscopy, transmission electron microscopy, X‐ray diffraction, Fourier transform infrared spectroscopy, UV‐Visible diffuse reflectance study, and X‐ray photoelectron Spectroscopy results showed that PPy chains form the core‐shell structure and may combine with OATP via π–π stacking interaction. Thermogravimetric analysis showed that the thermal stability of PPy/OATP‐SH composites was enhanced and these could be attributed to the retardation effect of OATP as barriers for the degradation of PPy. This method may open a new door for PPy‐based composites with special structures, higher performance, and thus broader application ranges. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41407.

Insight into the synergistic effect on adsorption for Cr(vi) by a polypyrrole-based composite

“…6 Attapulgite (ATP) is a kind of crystalline hydrated magnesium aluminum silicate with unique brous three-dimensional structure, excellent chemical stability and strong adsorption. 7,8 However, ATP may easily agglomerate due to its large surface area, and therefore its adsorption efficiency becomes low.…”

Selective Adsorbent Design with Multifunctional Surfaces: Innovating Solutions for Heterogeneous Catalysis in Water

“…Figure a 1 shows the IR absorption characteristic peaks of ATP sample, where the peaks at 3556 and 3405 cm –1 originate from the O–H stretching vibrations of interlayer water and surface hydroxylation of pristine ATP . The broader and sharp band is observed at 1653, 1029, and 467 cm –1 which can be accounted for the surface-adsorbed or interlayer water, the antisymmetric stretching vibration of (Mg, Al)–Si–O, and the asymmetric stretching modes of Si–O–Si. − Especially for the band at 1448 cm –1 , which resulting from the associated mineral of ATP clay, is classified as calcite . After surface bridging and polypyrrole shell building stage, the obtained Fe/ATP@PPy exhibits similar but narrow and weak absorption bands associated with ATP of approximately the same wave numbers.…”

Preparation and properties of chitosan/organic‐modified attapulgite composite proton exchange membranes for fuel cell applications

“…ATP was purchased from the Huaiyuan Mining Industry Co. (China). Chitosan (Mw = 500 kDa, degree of deacetylation = 90) was supplied by Zhejiang Aoxing Biotechnology Co., Ltd. (China), and the acidified ATP was obtained from ATP according to the procedure by Feng et al DC5700 (Octadecyldimethyl (3‐trimethoxysilylpropyl) ammonium chloride) was purchased from Sinopharm Chemical Reagent Co., Ltd (China). Acetic acid (A.R.)…”

“…However, in order to improve the interfacial property of ATP in organic polymer, the surface modification of ATP with organic group is necessary. Feng et al modify ATP by hexadecylpyridinium chloride; the prepared PPy(polypyrrole)/ATP conductive composites exhibit improved performance of conductivity . The tertiary‐amine‐modified ATP is reported by Wang et al, the obtained SPEK (sulfonated poly[aryl ether ketone])/ATP composite membranes show higher proton conductivity than pristine SPEK .…”