Preparation and properties of hybrids of organo-soluble polyimide and montmorillonite with various chemical surface modification methods

Yang, Yong; Zhu, Zhiwei; Yin, Jie; Wang, Xinyu; Qi, Zong-eng

doi:10.1016/s0032-3861(98)00675-2

Cited by 190 publications

(100 citation statements)

References 11 publications

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“…They are exfoliation-adsorption, [4][5][6][7][8] in situ intercalative polymerization, 9-11 melt intercalation, [12][13][14] and template synthesis. 15,16 Recently, montmorillonite (MMT), a layered material with lamellar structure, has attracted the researchers' interest for the preparation of polymer/clay nanocomposites because of its higher surface area, high aspect ratio, improved adhesion between polymer and particle, and lower amount of loading required to achieve remarkable properties. 17 Many MMT nanocomposites have been investigated, for instance, poly(e-caprolactone)/MMT, 18 epoxy/MMT, 19 PU/MMT, 20 PVA/MMT, 21 PP/MMT, 22 and PS/ MMT.…”

Section: Introductionmentioning

confidence: 99%

Development of nanocomposites of bentonite with polyaniline and poly(methacrylic acid)

Singhal

Datta

2006

J of Applied Polymer Sci

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Nanocomposites of bentonite with polyaniline (PANI), poly(methacrylic acid) (PMAA), and poly (aniline-co-methacrylic acid) (PANI-co-PMAA) were prepared by in situ intercalative polymerization technique. The nanocomposites were characterized by FTIR and UV-visible spectroscopies, XRD, SEM, TEM, as well as TG-DTA studies. The in situ intercalative polymerization of PANI, PMAA, and PANI-co-PMAA within bentonite layers was confirmed by FTIR, XRD, SEM, as well as TEM studies. XRD confirmed the intercalation of polymers and copolymer in bentonite. The average particle size of the nanocomposites was found to be in the range of 250-500 nm. The thermal stability was found be the highest for PANI-co-PMAA-bentonite. The swelling behavior studies suggest that these nanocomposites hold potential for their utilization in absorption of toxic materials from waste water.

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Section: Introductionmentioning

confidence: 99%

Development of nanocomposites of bentonite with polyaniline and poly(methacrylic acid)

Singhal

Datta

2006

J of Applied Polymer Sci

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“…In addition, nanocomposites have been studied for their ability to retard gas and water vapor transmission by extending the pathway and time for diffusing molecules, making it more tortuous (Bharadwaj, 2001;Bharadwaj et al, 2002). Another advantage of nano-sized particles is that these fillers, in contrast to micro-or macro-composites, do not affect the transparency of the composite matrix as their dimensions are smaller than the wavelengths of visual light (Yang et al, 1999;Alexandre and Dubois, 2000;Zeng et al, 2005). To take full advantage of the enhancements enabled by the nanometer size of the particles, uniform and nanoscale dispersion of the particles in the continuous polymer matrix is an essential step in the formation of nanocomposites (Yang et al, 1999).…”

mentioning

confidence: 99%

“…Another advantage of nano-sized particles is that these fillers, in contrast to micro-or macro-composites, do not affect the transparency of the composite matrix as their dimensions are smaller than the wavelengths of visual light (Yang et al, 1999;Alexandre and Dubois, 2000;Zeng et al, 2005). To take full advantage of the enhancements enabled by the nanometer size of the particles, uniform and nanoscale dispersion of the particles in the continuous polymer matrix is an essential step in the formation of nanocomposites (Yang et al, 1999). In the case of layered silicates, depending on the nature and type of the matrix, compatibility between matrix and filler, as well as the mixing process, different composite structures can be obtained (Paul and Robeson, 2008).…”

mentioning

confidence: 99%

Improvement of Food Packaging-Related Properties of Whey Protein Isolate-Based Nanocomposite Films and Coatings by Addition of Montmorillonite Nanoplatelets

et al. 2017

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In this study, the effects of the addition of montmorillonite (MMT) nanoplatelets on whey protein isolate (WPI)-based nanocomposite films and coatings were investigated. The main objective was the development of WPI-based MMT nanocomposites with enhanced barrier and mechanical properties. WPI-based nanocomposite cast films and coatings were prepared by dispersing 0% (reference sample), 3, 6, 9% (w/w protein) MMT, or, depending on the protein concentration, also 12 and 15% (w/w protein) MMT into native WPI-based dispersions, followed by subsequent denaturation during the drying and curing process. The natural MMT nanofillers could be randomly dispersed into film-forming WPI-based nanodispersions, displaying good compatibility with the hydrophilic biopolymer matrix. As a result, by addition of 15% (w/w protein) MMT into 10% (w/w dispersion) WPI-based cast films or coatings, the oxygen permeability (OP) was reduced by 91% for glycerol-plasticized and 84% for sorbitol-plasticized coatings, water vapor transmission rate was reduced by 58% for sorbitol-plasticized cast films. Due to the addition of MMT nanofillers, the Young's modulus and tensile strength improved by 315 and 129%, respectively, whereas elongation at break declined by 77% for glycerol-plasticized cast films. In addition, comparison of plasticizer type revealed that sorbitol-plasticized cast films were generally stiffer and stronger, but less flexible compared glycerol-plasticized cast films. Viscosity measurements demonstrated good processability and suitability for up-scaled industrial processes of native WPI-based nanocomposite dispersions, even at high-nanofiller loadings. These results suggest that the addition of natural MMT nanofillers into native WPI-based matrices to form nanocomposite films and coatings holds great potential to replace well-established, fossil-based packaging materials for at least certain applications such as oxygen barriers as part of multilayer flexible packaging films.

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“…In the absence of micelles, or when the concentration of monomer in the aqueous phase is considerably high, the homogeneous nucleation may take place. 46 In this process of nucleation, oligoradicals precipitate when they reach the critical length (jcrit). The coagulative nucleation is considered an extension of the homogeneous process.…”

Section: Atom Transfer Radical Polymerization (Atrp)mentioning

confidence: 99%

“…46 The surface modification of particles is required, in most cases, to promote the compatibility between hydrophilic particles and the hydrophobic polymer phase, reducing, therefore, the agglomeration of the mineral in the polymer matrix.…”

Section: Nanocompositesmentioning

confidence: 99%

Síntese de nanocompósitos com propriedades anisotrópicas via polimerização radicalar controlada em emulsão

Chaparro¹

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Preparation and properties of hybrids of organo-soluble polyimide and montmorillonite with various chemical surface modification methods

Cited by 190 publications

References 11 publications

Development of nanocomposites of bentonite with polyaniline and poly(methacrylic acid)

Development of nanocomposites of bentonite with polyaniline and poly(methacrylic acid)

Improvement of Food Packaging-Related Properties of Whey Protein Isolate-Based Nanocomposite Films and Coatings by Addition of Montmorillonite Nanoplatelets

Síntese de nanocompósitos com propriedades anisotrópicas via polimerização radicalar controlada em emulsão

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