Synthesis and Gas Transport Properties of Poly(2,6-dimethyl-1,4-phenylene oxide)–Silica Nanocomposite Membranes

The emulsion polymerized mixed matrix (EPMM) method is a new approach to prepare nanocomposite membranes, in which inorganic nanoparticles are synthesized in situ at the interface of a dispersed aqueous phase in a continuous phase of polymer solution. In this paper, we report the synthesis and characterization of poly(2,6-dimethyl-1,4-phenylene oxide) (PPO)-based EPMM membranes, in which silica nanoparticles are synthesized by the polymerization of tetraethylorthosilicate (TEOS) in the presence of two different co-solvents, ethanol and acetone, which are soluble in both the aqueous phase and the polymer solution. The EPPM membranes prepared in the presence of acetone show greater conversions of TEOS and a different structure of the synthesized silica nanoparticles compared to the EPMM membranes prepared in the presence of ethanol. The former membranes are both more permeable and more selective for O2/N2 and CO2/CH4. Both types of EPMM membranes are more permeable than the reference PPO membranes. However, while their O2/N2 selectivity is practically unchanged, their CO2/CH4 selectivity is decreased compared to the reference PPO membranes.

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99/03114 In situ characterization of cobalt based Fischer-Tropsch catalysts: a new approach to the active phase

Fuel and Energy Abstracts ◽

10.1016/s0140-6701(99)91069-x ◽

1999 ◽

Vol 40 (5) ◽

pp. 328

Keyword(s):

Active Phase ◽

In Situ Characterization ◽

Fischer Tropsch ◽

New Approach

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A new approach to characterization of the transition temperatures of thin film NiTi shape memory alloys

Journal of Materials Research ◽

10.1557/jmr.2004.0240 ◽

2004 ◽

Vol 19 (6) ◽

pp. 1762-1767

Author(s):

Nicholas W. Botterill ◽

David M. Grant ◽

Jianxin Zhang ◽

Clive J. Roberts

Keyword(s):

Thin Film ◽

Shape Memory Alloys ◽

Shape Memory ◽

Transition Temperatures ◽

New Approach ◽

Novel Approach ◽

Potential Applications ◽

Niti Shape Memory Alloys

A novel approach in determining the transition temperatures of NiTi shape memory alloys was investigated and compared with conventional techniques. The technique is based on microthemal analysis using a scanning thermal microscope (SThM). In particular, this method has the potential to allow the transformation temperatures of thin films to be investigated in situ. Thin film shape memory alloys have potential applications, such as microactuators, where conventional analysis techniques are either not directly applicable to such samples or are difficult to perform.

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Preparation of polyamide thin film nanocomposite membranes containing silica nanoparticles via an in-situ polymerization of SiCl4 in organic solution

Journal of Membrane Science ◽

10.1016/j.memsci.2018.08.016 ◽

2018 ◽

Vol 565 ◽

pp. 145-156 ◽

Cited By ~ 20

Author(s):

Hongmei Shen ◽

Shuhao Wang ◽

Hao Xu ◽

Yong Zhou ◽

Congjie Gao

Keyword(s):

Thin Film ◽

Silica Nanoparticles ◽

In Situ Polymerization ◽

Organic Solution ◽

Nanocomposite Membranes ◽

Thin Film Nanocomposite

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Preparation and characterization of a novel nanocomposite particles via in situ emulsion polymerization of vinyl functionalized silica nanoparticles and vinyl acetate

Journal of Sol-Gel Science and Technology ◽

10.1007/s10971-013-3133-3 ◽

2013 ◽

Vol 68 (1) ◽

pp. 54-59 ◽

Cited By ~ 6

Author(s):

Jie Li ◽

LianXi Chen ◽

Xi Li ◽

ZhongMing Zhang ◽

CaiBin Jiao

Keyword(s):

Silica Nanoparticles ◽

Emulsion Polymerization ◽

Vinyl Acetate ◽

Functionalized Silica ◽

Nanocomposite Particles ◽

In Situ Emulsion Polymerization ◽

Functionalized Silica Nanoparticles

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Effect of Inorganic Doping on the Thermoelectric Behavior of Polyaniline Nanocomposites

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.835.200 ◽

2020 ◽

Vol 835 ◽

pp. 200-207

Author(s):

Mariamu K. Ali ◽

Ahmed Abd Moneim

Keyword(s):

Electrical Conductivity ◽

Conducting Polymers ◽

Inorganic Nanoparticles ◽

Inorganic Materials ◽

Environmental Stability ◽

Subsequent Reduction ◽

Preparation Methods ◽

Reduced Graphene

Polyaniline (PANI) has been considered for thermoelectric (T.E) applications due to its facile preparation methods, easy doping-dedoping processes and its environmental stability. Like other conducting polymers (CPs), it has low thermal conductivity (usually below 1 Wm-1K-1) which is favorable for T.E applications, however studies have shown that it still suffers from low power factors as a result of low electrical conductivity. For this reason, PANI has been compounded with other materials such as polymers, inorganic nanoparticles and carbon nanoparticles to enhance its electrical conductivity, power factors (PF) and ultimately zT value.This work is focused on the synthesis and characterization of n-type polyaniline nanocomposites doped with reduced graphene oxide (rGO). The rGO was prepared through oxidation of graphite and subsequent reduction and incorporated into polyaniline through in situ polymerization and the resulting nanocomposites were characterized. Addition of rGO resulted in enhancement of the electrical conductivity of polyaniline from 10-3 S/cm to 10-1 S/cm which is two orders of magnitude higher. This contributed to the enhanced PF, an indication that thermoelectric behavior of conducting polymers can be boosted through compounding with inorganic materials.

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