Assessment of Graphene Oxide and Nanoclay Based Hybrid Filler in Chlorobutyl-Natural Rubber Blend for Advanced Gas Barrier Applications

Nanomaterials have engaged response from the scientific world in recent decades due to their exceptional physical and chemical properties counter to their bulk. They have been widely used in a polymer matrix to improve mechanical, thermal, barrier, electronic and chemical properties. In rubber nanocomposites, nanofillers dispersion and the interfacial adhesion between polymer and fillers influences the composites factual properties. In the present work, a comparison of the hybrid effects of carbon black with two different nanofillers (graphene oxide and nanoclay) was studied. The 70/30 composition of chlorobutyl rubber/natural rubber elastomer blend was taken as per the blend composition optimized from our previous studies. The hybrid effects of graphene oxide and nanoclay in dispersing the nanofillers were studied mainly by analyzing nanocomposite barrier properties. The results confirm that the combined effect of carbon black with graphene oxide and nanoclay could create hybrid effects in decreasing the gas permeability. The prepared nanocomposites which partially replace the expensive chlorobutyl rubber can be used for tyre inner liner application. Additionally, the reduction in the amount of carbon black in the nanocomposite can be an added advantage of considering the environmental and economic factors.

Download Full-text

Synthesis and Characterization of Zirconium Nitride Nanopowders by Internal Gelation and Carbothermic Nitridation

Scientific Reports ◽

10.1038/s41598-019-55450-x ◽

2019 ◽

Vol 9 (1) ◽

Cited By ~ 1

Author(s):

Shijiao Zhao ◽

Jingtao Ma ◽

Rui Xu ◽

Xuping Lin ◽

Xing Cheng ◽

...

Keyword(s):

Carbon Black ◽

Chemical Properties ◽

Phase Evolution ◽

Zirconium Nitride ◽

Molar Ratio ◽

Nitridation Process ◽

Zirconium Compounds ◽

Physical And Chemical ◽

And Chemical Properties

AbstractZirconium compounds has been widely attention over the last decades due to its excellent physical and chemical properties. Zirconium nitride nanopowders were synthesized via a simple direct carbothermic nitridation process of internal gel derived zirconia in the presence of nano-sized carbon black. The effects of reaction temperature, dwell time and molar ratio of carbon black to Zr (C/Zr) on the phase composition, grain size and crystal parameters of products were studied. Based upon the analysis of crystallite phase evolution and microstructure characterization, it was found that zirconium oxynitride is intermediate product and then O atoms in oxynitride were extracted by oxygen getter, carbon black. Anion sites were directly replaced by N atoms to form rock-salt type nitride in carbothermic nitridation process.

Download Full-text

Probing the accuracy of reactive and non-reactive force fields to describe physical and chemical properties of graphene-oxide

Computational Materials Science ◽

10.1016/j.commatsci.2015.12.030 ◽

2016 ◽

Vol 114 ◽

pp. 236-243 ◽

Cited By ~ 14

Author(s):

Alexandre F. Fonseca ◽

Tao Liang ◽

Difan Zhang ◽

Kamal Choudhary ◽

Susan B. Sinnott

Keyword(s):

Graphene Oxide ◽

Force Fields ◽

Chemical Properties ◽

Physical And Chemical Properties ◽

Reactive Force ◽

Reactive Force Fields ◽

Physical And Chemical ◽

And Chemical Properties

Download Full-text

Graphene Oxide and Polyethyleneimine Cooperative Construct Ionic Imprinted Cellulose Nanocrystals Aerogel for Selective Adsorption of Dy(III)

10.21203/rs.3.rs-586534/v2 ◽

2021 ◽

Author(s):

Xudong Zheng ◽

Wen Sun ◽

Ang Li ◽

Bin Wang ◽

Rong Jiang ◽

...

Keyword(s):

Graphene Oxide ◽

Rare Earth ◽

Cellulose Nanocrystals ◽

Selective Adsorption ◽

Chemical Properties ◽

Regeneration Ability ◽

Maximum Adsorption Capacity ◽

Physical And Chemical Properties ◽

Physical And Chemical ◽

And Chemical Properties

Abstract Because of dysprosium's unique physical and chemical properties and limited supply, the price of rare earth dysprosium has been high in recent years. Therefore, the study of the method of high efficiency selective separation of dysprosium has the double value of scientific research and practical economy. In this paper, we used periodic cellulose nanocrystals as the basic structure, polyethylenimine and graphene oxide were introduced, combined with imprinting technology, to construct porous imprinted aerogel and use it for selective adsorption of Dy(III). The physical and chemical properties were characterized by SEM, TEM, FT-IR and TGA. It was proved that both polyethylenimine and graphene oxide were crosslinked effectively with cellulose nanocrystals. Adsorption experiments showed that the composite imprinted aerogel could selectively adsorb dysprosium effectively, and the maximum adsorption capacity for Dy(III) was 36.495 mg g− 1. The reproducibility experiment showed that aerogel had good regeneration ability. In conclusion, cellulose nanocrystals aerogel, which is environmentally friendly, efficient and repeatable, is expected to provide a new direction for the recovery of rare earth elements.

Download Full-text

Controllable reduction of graphene oxide by electron-beam irradiation

RSC Advances ◽

10.1039/c8ra06797j ◽

2019 ◽

Vol 9 (7) ◽

pp. 3597-3604 ◽

Cited By ~ 13

Author(s):

Yu Yang ◽

Liang Chen ◽

De-Yuan Li ◽

Ruo-Bing Yi ◽

Jia-Wei Mo ◽

...

Keyword(s):

Graphene Oxide ◽

Electron Beam ◽

Oxygen Content ◽

Electron Beam Irradiation ◽

Chemical Properties ◽

Suspension Stability ◽

Physical And Chemical Properties ◽

Beam Irradiation ◽

Physical And Chemical ◽

And Chemical Properties

The oxygen content of graphene oxide (GO) is directly related to its physical and chemical properties, such as hydrophilicity, suspension stability, adsorption, and ion-sieving ability of GO membranes.

Download Full-text

Progress of Graphene-Based Hydrogel

Materials Science Forum ◽

10.4028/www.scientific.net/msf.852.714 ◽

2016 ◽

Vol 852 ◽

pp. 714-719

Author(s):

Yu Xiang ◽

Li Bin Liu ◽

Zhao Dang ◽

Ting Li

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Chemical Properties ◽

Physical And Chemical Properties ◽

Two Dimensional ◽

Reduced Graphene ◽

Physical And Chemical ◽

Significant Attention ◽

And Chemical Properties

Graphene, a typical two-dimensional planar monolayer of sp2carbon atoms, has attracted significant attention due to its outstanding physical and chemical properties. Nowadays, many graphene-based composites have been synthesized. Among them, graphene hydrogels (including graphene oxide hydrogel and reduced graphene oxide hydrogel) as a kind of graphene-based composites have a wide application prospect. In this paper, the progresses of graphene-based hydrogels are reviewed, and the prospects for the development of graphene-based hydrogels are also discussed.

Download Full-text

Solar light assisted green synthesis of photoreduced graphene oxide for the high-efficiency adsorption of anionic dyes

RSC Advances ◽

10.1039/c7ra10009d ◽

2017 ◽

Vol 7 (84) ◽

pp. 53362-53372 ◽

Cited By ~ 12

Author(s):

Yani Gong ◽

Chengbing Qin ◽

Wenjun He ◽

Zhixing Qiao ◽

Guofeng Zhang ◽

...

Keyword(s):

Graphene Oxide ◽

High Efficiency ◽

Organic Dyes ◽

Chemical Properties ◽

High Specific Surface Area ◽

Polluted Water ◽

Anionic Dyes ◽

Environmental Friendliness ◽

Physical And Chemical ◽

And Chemical Properties

Graphene oxide (GO) with unique physical and chemical properties, such as high specific surface area, chemical stability and environmental friendliness, has been considered as an excellent adsorbent to remove organic dyes from polluted water.

Download Full-text

Graphene Oxide and Polyethyleneimine Cooperative Construct Ionic Imprinted Cellulose Nanocrystals Aerogel for Selective Adsorption of Dy(III)

10.21203/rs.3.rs-586534/v1 ◽

2021 ◽

Author(s):

Xudong Zheng ◽

Wen Sun ◽

Ang Li ◽

Bin Wang ◽

Rong Jiang ◽

...

Keyword(s):

Graphene Oxide ◽

Rare Earth ◽

Cellulose Nanocrystals ◽

Selective Adsorption ◽

Chemical Properties ◽

Regeneration Ability ◽

Maximum Adsorption Capacity ◽

Physical And Chemical Properties ◽

Physical And Chemical ◽

And Chemical Properties

Abstract Because of dysprosium's unique physical and chemical properties and limited supply, the price of rare earth dysprosium has been high in recent years. Therefore, the study of the method of high efficiency selective separation of dysprosium has the double value of scientific research and practical economy. In this paper, we used periodic cellulose nanocrystals as the basic structure, polyethylenimine and graphene oxide were introduced, combined with imprinting technology, to construct porous imprinted aerogel and use it for selective adsorption of Dy(III). The physical and chemical properties were characterized by SEM, TEM, FT-IR and TGA. It was proved that both polyethylenimine and graphene oxide were crosslinked effectively with cellulose nanocrystals. Adsorption experiments showed that the composite imprinted aerogel could selectively adsorb dysprosium effectively, and the maximum adsorption capacity for Dy(III) was 39.027 mg g− 1. The reproducibility experiment showed that aerogel had good regeneration ability. In conclusion, cellulose nanocrystals aerogel, which is environmentally friendly, efficient and repeatable, is expected to provide a new direction for the recovery of rare earth elements.

Download Full-text

Accelerated Synthesis of Graphene Oxide from Graphene

Nanomaterials ◽

10.3390/nano11020551 ◽

2021 ◽

Vol 11 (2) ◽

pp. 551

Author(s):

Mariana C. F. Costa ◽

Valeria S. Marangoni ◽

Pei Rou Ng ◽

Hang T. L. Nguyen ◽

Alexandra Carvalho ◽

...

Keyword(s):

Graphene Oxide ◽

Chemical Properties ◽

Industrial Applications ◽

Graphite Oxidation ◽

Alternative Approach ◽

Graphene Flakes ◽

Superior Surface ◽

Physical And Chemical ◽

Modified Hummers Method ◽

And Chemical Properties

Graphene oxide (GO) is an oxygenated functionalized form of graphene that has received considerable attention because of its unique physical and chemical properties that are suitable for a large number of industrial applications. Herein, GO is rapidly obtained directly from the oxidation of graphene using an environmentally friendly modified Hummers method. As the starting material consists of graphene flakes, intercalant agents are not needed and the oxidation reaction is enhanced, leading to orders of magnitude reduction in the reaction time compared to the conventional methods of graphite oxidation. With a superior surface area, the graphene flakes are quickly and more homogeneously oxidized since the flakes are exposed at the same extension to the chemical agents, excluding the necessity of sonication to separate the stacked layers of graphite. This strategy shows an alternative approach to quickly producing GO with different degrees of oxidation that can be potentially used in distinct areas ranging from biomedical to energy storage applications.

Download Full-text

Fabrication and Characterization of Silk Fibroin/Curcumin Sustained-Release Film

Materials ◽

10.3390/ma12203340 ◽

2019 ◽

Vol 12 (20) ◽

pp. 3340 ◽

Cited By ~ 4

Author(s):

Xiaoning Zhang ◽

Zhenyu Chen ◽

Hong Bao ◽

Jianwei Liang ◽

Shui Xu ◽

...

Keyword(s):

Sustained Release ◽

Silk Fibroin ◽

Gas Permeability ◽

Transmission Rate ◽

Chemical Properties ◽

Wound Dressings ◽

Fabrication And Characterization ◽

Physical And Chemical ◽

And Chemical Properties

In the present work, a sustained-release film composed of silk fibroin (SF), curcumin (Cur), glutaraldehyde (GA), and glycerol (Gly) was prepared successfully for wound dressings. Features relevant to wound dressings of SF/Gly/GA/Cur film were assessed. Physical and chemical properties of the fabricated materials were also characterized. The results showed that the prepared SF/Gly/GA/Cur film demonstrated a good sustained-release performance, flexibility, and gas permeability. In addition, it was found that the prepared SF/Gly/GA/Cur film possessed the capability to effectively inhibit the growth of bacteria and prevent bacterial penetration with a suitable water vapor transmission rate. Furthermore, the prepared composite film was non-cytotoxic, which makes it an ideal material for wound dressings.

Download Full-text