Super water absorbency OMMT/PAA hydrogel materials with excellent mechanical properties

Zhang, Yuqi; Liu, Yao; Liu, Jiaqi; Guo, Pu; Heng, Liping

doi:10.1039/c7ra00372b

Cited by 29 publications

(20 citation statements)

References 32 publications

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“…Hydrogels, especially those made by biopolymers, are always biocompatible due to their large water content. Swollen hydrogels allow to be controlled with water contents close to those of biological tissues (≈70%) or even beyond 99.9% . Normally, the mechanical property of hydrogels closely relates to their water contents and crosslinking density.…”

Section: Applicationsmentioning

confidence: 99%

High‐strength hydrogels: Microstructure design, characterization and applications

Hua

Fei

2018

J Polym Sci B Polym Phys

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Hydrogels are a class of polymeric network materials embedded in a water-rich environment. They are widely applied in drug delivery, actuator, and sensor. However, conventional hydrogels encountered limits from their poor mechanical property. Recent researches in hydrogels have been focusing on mechanical enhancement, ranging from design of microstructures to adjustment of compositions in hydrogels. Here, the design and fabrication strategies of high-strength hydrogels, as well as major progress in their typical strength-support applications are systemically reviewed.

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Section: Applicationsmentioning

confidence: 99%

High‐strength hydrogels: Microstructure design, characterization and applications

Hua

Fei

2018

J Polym Sci B Polym Phys

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“…For MMT, the peak at 3620 cm −1 indicates the hydroxyl (OH) on the surface layers of MMT, and the broad band between 3500 and 1632 cm −1 can be attributed to the stretching vibrations of the interlayer water of MMT. In addition, the very strong absorption band at 1017 cm −1 corresponds to the SiO stretching vibration of MMT 32,33 . The FTIR spectra of PAA and PAA/MMT nanocomposites show very wide bands at 3700 and 2700 cm −1 , with a band at 3321 cm −1 caused by OH stretching vibration in the carboxyl group (COOH) of PAA 33 .…”

Section: Resultsmentioning

confidence: 99%

“…In addition, the very strong absorption band at 1017 cm −1 corresponds to the SiO stretching vibration of MMT 32,33 . The FTIR spectra of PAA and PAA/MMT nanocomposites show very wide bands at 3700 and 2700 cm −1 , with a band at 3321 cm −1 caused by OH stretching vibration in the carboxyl group (COOH) of PAA 33 . The 1453 cm −1 band is due to the asymmetric stretching mode of the CH 2 groups, and the band at 1258 cm −1 is due to CO stretching in the carboxylic groups 34,35 .…”

Section: Resultsmentioning

confidence: 99%

Barrier and structural properties of polyethylene terephthalate film coated with poly(acrylic acid)/montmorillonite nanocomposites

Lim

Lee

et al. 2020

Packag Technol Sci

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Food packaging is one of the most important parts of the food industry, and polyethylene‐based polymers have been widely used as food packaging films. In this study, corona‐treated polyethylene terephthalate (PET) films were used to increase adhesion to the barrier coating solution for multilayered film formation and various concentrations of montmorillonite (MMT; 0, 1, 3, and 5 wt.%) were used to improve the barrier properties of PET films for food packaging after different treatments of MMT including ultrasonication with bath or probe and 100‐W or 300‐W microwave to evenly disperse MMT. Among them, a 300‐W microwave treatment was most effective for size reduction of MMT particles. Even though 5 wt.% MMT was used to coat PET films with polyacrylic acid (PAA), good transmittance in the visible region (500 nm) was obtained, with a value similar to that of the neat PET film. The dispersion of MMT and binding of PAA/MMT nanocomposites were confirmed by field‐emission scanning electron microscopy, X‐ray diffraction, and Fourier transform infrared spectroscopy analyses. The water vapor and oxygen barrier properties of PET films were enhanced by PAA coating. Moreover, the oxygen permeability of PET films decreased via coating by PAA blended with 1 and 3 wt.% MMT. Based on these results, the PET film coated with PAA/MMT nanocomposites could be applied as food packaging films that require high gas barrier properties for oxygen‐sensitive food.

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“…Therefore, it is common to find MMT organically modified, with the purpose of improving dispersing capabilities and gelling absorption . Several recent studies include the application of these fillers for other purposes such as self‐healing hydrogels with biocompatible properties with significantly improved mechanical properties. Table shows several examples of research studies of different matrixes and MMT/smectite/bentonite nanoclays published mostly between 2015 and 2018.…”

Section: Nanofillersmentioning

confidence: 99%

An application‐oriented roadmap to select polymeric nanocomposites for advanced applications: A review

2019

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Polymeric nanocomposites are the materials incorporating nanosized inclusions into the polymer matrixes. The result of the addition of nanoparticles/fibers is a drastic improvement in properties that may include mechanical, electrical, thermal conductivity, or even the acoustical properties. Polymer nanocomposites have spawned huge interest for the development of high‐performance products such as lightweight sensors, thin‐film capacitors, batteries, flame retardant products, biodegradable and biocompatible materials, and so on. The field of polymer nanocomposites has been at the forefront of research in the polymer community for the past few decades and an extremely large number of scientific papers have been published. Nevertheless, application‐oriented guidelines for selecting the ecofriendly nanocomposites for advanced industrial applications are missing in the state of the art. This review article summarizes the current state‐of‐the‐art polymeric nanocomposites, highlighting prominent nanofillers categorized based on their applications, origins, dimensional characteristics, and so on. Each filler type contains a short description of its main feature together with the most relevant and potential applications. To address the global concern about nondegradable wastes, novel green alternatives of each nanofiller type are discussed. Special attention is also given to the biocompatibility properties of the composites. This study provides a state‐of‐the‐art road map to select multifunctional polymeric nanocomposites from huge varieties for advanced industrial applications.

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Super water absorbency OMMT/PAA hydrogel materials with excellent mechanical properties

Abstract: Montmorillonite/poly(acrylic acid) composite hydrogels, fabricated through UV irradiation polymerization, have a super water absorbency of 2786 g g−1 and excellent mechanical properties.

Cited by 29 publications

References 32 publications

High‐strength hydrogels: Microstructure design, characterization and applications

High‐strength hydrogels: Microstructure design, characterization and applications

Barrier and structural properties of polyethylene terephthalate film coated with poly(acrylic acid)/montmorillonite nanocomposites

An application‐oriented roadmap to select polymeric nanocomposites for advanced applications: A review

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