Synthesis of a self-healable and pH responsive hydrogel based on an ionic polymer/clay nanocomposite

RSC Advances ◽  
2016 ◽  
Vol 6 (85) ◽  
pp. 81654-81665 ◽  
Author(s):  
Sovan Lal Banerjee ◽  
Moumita Khamrai ◽  
P. P. Kundu ◽  
Nikhil K. Singha
Keyword(s):  
Self Healing ◽  
Nanocomposite Hydrogel ◽  
Ph Responsive ◽  
Ionic Polymer ◽  
Modified Montmorillonite ◽  
Organically Modified Montmorillonite ◽  
Polymer Clay Nanocomposite ◽  
Organically Modified ◽  
Ommt Clay

This investigation reports the preparation of a pH responsive self-healing nanocomposite hydrogel based on ionic polymer and organically modified montmorillonite (OMMT) clay.

scholarly journals Effects of Ultrasonication Time on Thermal Stability and Swelling Behaviour of The Commercial Organo-Montmorillonite (O-MMT)

2018 ◽  
Vol 7 (2.23) ◽  
pp. 288 ◽  
Author(s):  
Asna R.A. Hamid ◽  
Azlin F. Osman
Keyword(s):  
Thermal Stability ◽  
Interlayer Spacing ◽  
Water Medium ◽  
Melt Compounding ◽  
Modified Montmorillonite ◽  
Organically Modified Montmorillonite ◽  
Polymer Clay Nanocomposite ◽  
Organically Modified ◽  
Ultrasonication Time ◽  
Stability Enhancement

In this contribution, we report the effect of ultrasonication time on thermal stability and swelling of organically modified montmorillonite (O-MMT) upon ultrasonication in a water medium. In the production of well-exfoliated polymer/clay nanocomposite, ultrasonication was employed as a method to exfoliate and disperse organically modified montmorillonite (O-MMT) platelets prior to melt compounding with the polymer matrix. The suspension of distilled water and O-MMT was magnetically stirred for 2 hours and then ultrasonicated at the different sonicating time, namely, 2 minutes, 5 minutes, 10 minutes, 15 minutes and 20 minutes (min) at room temperature. Thermogravimetry analysis (TGA) suggested that dispersion of the O-MMT by ultrasonication for 5 minutes resulted in thermal stability enhancement without destruction of the organic surface modifier structure and bonding on the clay platelets. X-ray diffraction (XRD) also indicated that application of 5 minutes ultrasonication time has most obviously improved the swelling of the O-MMT platelets. This was further proved by Field emission scanning electron microscope (FeSEM) which revealed greater interlayer spacing within the O-MMT platelets was obtained. 

Biodegradable Polyester / Layered Silicate Nanocomposites

2002 ◽  
Vol 740 ◽  
Author(s):  
Pralay Maiti ◽  
Carl A. Batt ◽  
Emmanuel P. Giannelis
Keyword(s):  
Mechanical Properties ◽  
Storage Modulus ◽  
Layered Silicate ◽  
Layered Silicates ◽  
Melt Extrusion ◽  
Biodegradable Polyester ◽  
Modified Montmorillonite ◽  
Organically Modified Montmorillonite ◽  
Silicate Nanocomposites ◽  
Organically Modified

ABSTRACTNanocomposites of α-hydroxy polyester, polylactide (PLA) and β-hydroxy polyester, polyhydroxybutyrate (PHB) with layered silicates have been successfully prepared by melt extrusion of PLA and PHB with organically modified montmorillonite (MMT) and fluoromica. The mechanical properties of the nanocomposites are improved compared to the neat polymers. Storage modulus increase up to 40% compared with the pure polymers by adding only 2–3 wt% nanoclay. Biodegradation can be controlled by the choice of the nanoclay used.

Thermal characterization of organically modified montmorillonite

2001 ◽  
Vol 367-368 ◽  
pp. 339-350 ◽  
Author(s):  
Wei Xie ◽  
Zongming Gao ◽  
Kunlei Liu ◽  
Wei-Ping Pan ◽  
Richard Vaia ◽  
...  
Keyword(s):  
Thermal Characterization ◽  
Modified Montmorillonite ◽  
Organically Modified Montmorillonite ◽  
Organically Modified

Optimisation of the ceramic-like body for ceramifiable EVA-based composites

2017 ◽  
Vol 24 (4) ◽  
pp. 599-607 ◽  
Author(s):  
Xinhao Gong ◽  
Tingwei Wang
Keyword(s):  
Ceramic Body ◽  
Ethylene Vinyl Acetate ◽  
Melt Blending ◽  
Red Phosphorus ◽  
X Ray Diffraction ◽  
Modified Montmorillonite ◽  
Organically Modified Montmorillonite ◽  
Organically Modified ◽  
Dense Ceramic ◽  
Acetate Copolymer

AbstractVarious ceramifiable ethylene-vinyl acetate copolymer (EVA) composites were prepared by melt blending with two kinds of glass frits, organically modified montmorillonite (OMMT) and whitened and capsulised red phosphorus (WCRP). The influence of different filler components and firing temperatures on the ceramifiable properties of the composites was studied. The dripping behaviour of the composites was analyzed by a vertical burning test. The microstructure of the residues was characterised by X-ray diffraction (XRD) and scanning electron microscopy. The results showed that the optimised EVA composite was free of melt dripping during burning with the addition of OMMT. A dimensionally stable and dense ceramic residue was also obtained, especially with the addition of WCRP. It was suggested that new phases were formed at firing temperatures, and WCRP could promote the formation of ceramic body which was not fused during firing at 900°C as evidenced by XRD.

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