High improvement in the properties of exfoliated PU/clay nanocomposites by the alternative swelling process

Chen-Yang, Y. W.; Lee, Y.K.; Chen, Y.T.; Wu, Jeng-Yue

doi:10.1016/j.polymer.2007.03.024

Cited by 71 publications

(44 citation statements)

References 35 publications

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“…This result suggested that the layered silicate galleries of the PUB 0.25%, PUB 0.50% and PUB 0.75% have been either intercalated to a space of more than 3.5 nm (2h < 2°) or exfoliated in the PU matrix [31]. Otherwise, the absence of diffraction peaks in the XRD data of the PUB 0.25% , PUB 0.50% and PUB 0.75% should be due to clay loading, which are below the detection limit of the instrument or random orientation of clay tactoids, consistent with similar results [32].…”

Section: Xrd Of Pu/oda-b Nanocompositessupporting

confidence: 81%

“…This implies that with a smaller content, the layered silicates of ODA-B were dispersed better and exfoliated by the polymer chains, but, as more ODA-B was added, not all the clay could be dispersed well enough. Thus it could be concluded that at high content of the ODA-B one area was mainly intercalated while the other is exfoliated by the polyurethane chains (which is known as partial exfoliation) [33,32]. Fig.…”

Section: Xrd Of Pu/oda-b Nanocompositesmentioning

confidence: 99%

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Electrophysical characteristics of polyurethane/organo-bentonite nanocomposites

Motawie

Madani

Esmail

et al. 2014

Egyptian Journal of Petroleum

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Modification of the Egyptian Bentonite (EB) was carried out using organo-modifier namely; octadecylamine ODA. Before the modification, the cation exchange capacity (CEC) of the EB was measured, also it was purified from different impurities using HCl and distilled water. The Organo-bentonite OB was characterized using IR, XRD, and TEM. PU/ODA-B nanocomposites were prepared by in situ polymerization then characterized by XRD and TEM. An amount of ODA-B ranging from 0.25% up to 5% by weight was added to the polyol component of the resin before mixing with toluene diisocynate TDI. TEM showed that the nanocomposites achieved good dispersion in the polyurethane matrix. The mechanical, swelling and electrical properties of the nanocomposites were measured. The results indicate that the tensile strength of all the nanocomposites enhanced with the addition of OB compared with the pure PU. The crosslink density of the nanocomposites increases with increasing the content of OB. The Pool-Frenckel conduction mechanism predominates for all the nanocomposite samples and the blank one. ª 2014 Production and hosting by Elsevier B.V. on behalf of Egyptian Petroleum Research Institute.

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Section: Xrd Of Pu/oda-b Nanocompositessupporting

confidence: 81%

Section: Xrd Of Pu/oda-b Nanocompositesmentioning

confidence: 99%

Electrophysical characteristics of polyurethane/organo-bentonite nanocomposites

Motawie

Madani

Esmail

et al. 2014

Egyptian Journal of Petroleum

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“…27 The acid treatment of ATT (ATT-OH) and the grafting of functional groups on ATT (ATT-MDI) were also verified by FTIR, as shown in Figure 5(b,c). In the high wave-number region, a broad band at 3600-3200 cm 21 was attributed to adsorbed water molecules, and the band increased after the acid attack.…”

Section: Characterization Of Attmentioning

confidence: 75%

Synthesis and characterization of organically modified attapulgite/polyurethane nanocomposites

Wang

Auad

Marcovich

et al. 2008

J of Applied Polymer Sci

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Polyurethane (PU) nanocomposites filled with attapulgite (ATT) nanorods were synthesized and characterized with thermal analysis, dynamic mechanical analysis (DMA), and mechanical testing. The formulations were based on 4,4 0 -methylene bis(phenyl isocyanate) (MDI), polytetrahydrofuran, 1,4-butanediol, and inorganic ATT premodified with MDI. The original and premodified ATT (ATT-OH and ATT-MDI) nanorods were characterized with thermogravimetric analysis (TGA) and Fourier transform infrared (FTIR) spectroscopy. The analysis revealed that 17 wt % MDI was grafted/adsorbed onto the surface of ATT as a result of the modification.Pristine PU and ATT-MDI/PU nanocomposites were characterized with scanning electron microscopy, differential scanning calorimetry, and TGA. The mechanical tests and DMA showed an increase in the storage modulus and Young's modulus with increasing ATT-MDI content. The crystallinity of the hard and soft segments and thermal stability showed enhancements over those of the neat resin.

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“…Nanoclay is another type of nonporous inorganic filler used extensively in the polymer composite industry, which exhibits good potential to be incorporated in MMMs for gas separation systems 34. According to literature, very low clay loadings, i.e., ≤ 10 mass % clay, resulted in enhanced thermal, mechanical, optical, electrical, and barrier properties 35–40.…”

Section: MMM Interpenetrated With Organic Fillersmentioning

confidence: 99%

Current Status and Future Prospect of Polymer‐Layered Silicate Mixed‐Matrix Membranes for CO₂/CH₄ Separation

2016

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The mixed‐matrix membrane (MMM), a state‐of‐the‐art polymer‐inorganic hybrid, is a relatively recent addition to the membrane family which adopts the synergistic advantages of the polymer and inorganic phase. Although marked improvement has been achieved by MMMs in CO2/CH4 separation, the development of a defect‐free structure to transcend the Robeson upper bound limit remains a challenge. In previous years, a number of inorganic materials with diverse nature have been studied for CO2/CH4 separation; however, layered silicates have not attracted much attention despite their superior thermal and mechanical properties. Analyses of the potential of using layered silicates as inorganic fillers in MMM fabrication for CO2/CH4 separation are reviewed. Additionally, the immediate challenges toward successful formation of layered silicate‐based MMM and future prospects are addressed.

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High improvement in the properties of exfoliated PU/clay nanocomposites by the alternative swelling process

Cited by 71 publications

References 35 publications

Electrophysical characteristics of polyurethane/organo-bentonite nanocomposites

Electrophysical characteristics of polyurethane/organo-bentonite nanocomposites

Synthesis and characterization of organically modified attapulgite/polyurethane nanocomposites

Current Status and Future Prospect of Polymer‐Layered Silicate Mixed‐Matrix Membranes for CO₂/CH₄ Separation

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High improvement in the properties of exfoliated PU/clay nanocomposites by the alternative swelling process

Cited by 71 publications

References 35 publications

Electrophysical characteristics of polyurethane/organo-bentonite nanocomposites

Electrophysical characteristics of polyurethane/organo-bentonite nanocomposites

Synthesis and characterization of organically modified attapulgite/polyurethane nanocomposites

Current Status and Future Prospect of Polymer‐Layered Silicate Mixed‐Matrix Membranes for CO2/CH4 Separation

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Current Status and Future Prospect of Polymer‐Layered Silicate Mixed‐Matrix Membranes for CO₂/CH₄ Separation