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  • Open Access

    ARTICLE

    Performance Enhancement of Bio-fouling Resistant Cellulose triacetate-based Osmosis Membranes using Functionalized Multiwalled Carbon Nanotube & Graphene Oxide

    A.K. GHOSH1, RUTUJA S. BHOJE2, R.C. BINDAL1

    Journal of Polymer Materials, Vol.37, No.1-2, pp. 109-120, 2020, DOI:10.32381/JPM.2020.37.1-2.8

    Abstract In this study, cellulose triacetate (CTA) based nanocomposite membranes were developed by incorporation of carboxylic acid functionalized multiwalled carbon-nanotube (cMWCNT) and graphene oxide (GO) which have enhancement of both flux and fouling resistance properties of the membranes. Membranes were casted at room temperature and annealed at 90o C hot water for 10 minutes. The incorporation level of both the nanomaterials is 1.5% of the CTA polymer weight in the nanocomposite membranes. Prepared membranes were characterized in terms of water contact angle, surface morphology and mechanical strength. The performance of the membranes was evaluated both in… More >

  • Open Access

    ARTICLE

    Growth of Non-enzymatic Cholesterol Biosensor using TiO2 Decorated Graphene Oxide with Bare GCE and PPy-GCE

    S. DEIVANAYAKI1,*, P. JAYAMURUGAN2, S. ASHOKAN3, V. GOPALA KRISHNAN4, B. YOGESWARI5

    Journal of Polymer Materials, Vol.38, No.3-4, pp. 295-307, 2021, DOI:10.32381/JPM.2021.38.3-4.10

    Abstract The cholesterol level determination is a significant clinical diagnostic solution for heart and, thrombosis problems. In this work, we examined a novel non-enzymatic cholesterol biosensor using cholesterol oxidase (ChOx) enzyme immobilized on TiO2 nanoparticles influenced by reduced graphene oxide (rGO) - polypyrrole (PPy) (rGO-TiO2 /PPy-GCE) nanocomposite was developed on a glassy carbon electrode (GCE) and the higher sensing response with lower detection limits were observed. The electrochemical properties of GCE modified PPy (PPy-GCE) were studied using CV (Cyclic Voltammetry) and DPV (Differential Pulse Voltammetry). The reported sensor exhibited piecewise linearity in the range of 0.1 µM More >

  • Open Access

    ARTICLE

    Green Synthesis of Reduced Graphene Oxide Nanosheet by using L-ascorbic Acid and Study of its Cytotoxicity on Human Cervical Cancer Cell Line

    PRABHAT KUMAR, ANJANA SARKAR, PURNIMA JAIN*

    Journal of Polymer Materials, Vol.39, No.1-2, pp. 121-135, 2022, DOI:10.32381/JPM.2022.39.1-2.8

    Abstract Biocompatible graphene derivative materials (GBMs) to harness the maximum potential of pristine graphene biologically, is the most important strategy for its advanced applications in pharmaceutical and other biomedical fields. Currently, scientists are trying to find this by using biopolymer nanocomposites or anchored materials. Nevertheless, tuning the bare GBMs towards biocompatibility is a beautiful approach to exploit the fundamental potential of pristine graphene vis-à-vis suppressing the effects of incorporated biopolymers or anchored materials. Herein, a large-scale, cost-effective, facile, and environment-friendly green synthetic strategy is used for the synthesis of reduced graphene oxide (rGO) nanosheet using L-ascorbic… More >

  • Open Access

    PROCEEDINGS

    Experimental Study of the Electrical Resistance of Graphene OxideReinforced Cement-Based Composites with Notch or Rebar

    Yangao Hu1,*

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.27, No.3, pp. 1-1, 2023, DOI:10.32604/icces.2023.09773

    Abstract This paper investigates the effects of graphene oxide (GO), notch depth, rebar, and load on the resistivity of cement paste and mortar. The electrical conductivity of GO/cement composite reaches its maximum value when the GO content is 0.03%, which is approximately 50% higher compared to the composite without GO. The resistivity of GO/cement composite shows significant changes with increasing load from 0 to 40 kN. The gauge factor for compressive loading varies from about 26 to 73 for different GO contents. Moreover, the resistivity variation with the notch depth in GO/cement is found to be More >

  • Open Access

    ARTICLE

    Radiative Blood-Based Hybrid Copper-Graphene Nanoliquid Flows along a Source-Heated Leaning Cylinder

    Siti Nur Ainsyah Ghani1, Noor Fadiya Mohd Noor1,2,*

    CMES-Computer Modeling in Engineering & Sciences, Vol.139, No.1, pp. 1017-1037, 2024, DOI:10.32604/cmes.2023.031372

    Abstract Variant graphene, graphene oxides (GO), and graphene nanoplatelets (GNP) dispersed in blood-based copper (Cu) nanoliquids over a leaning permeable cylinder are the focus of this study. These forms of graphene are highly beneficial in the biological and medical fields for cancer therapy, anti-infection measures, and drug delivery. The non-Newtonian Sutterby (blood-based) hybrid nanoliquid flows are generalized within the context of the Tiwari-Das model to simulate the effects of radiation and heating sources. The governing partial differential equations are reformulated into a nonlinear set of ordinary differential equations using similar transformational expressions. These equations are then… More >

  • Open Access

    REVIEW

    A Review of Graphene Oxide Crosslinking as Enhanced Corrosion Shield Application

    Nurul Anis Athirah Ab Aziz*, Chin Wei Lai*, Boon Hoong Ong

    Journal of Renewable Materials, Vol.11, No.6, pp. 2745-2770, 2023, DOI:10.32604/jrm.2023.025899

    Abstract Nowadays, corrosion is not only undesirable, but it also has a significant influence on the industrial sectors and technical innovations that have demand for metals. The global economic damage is expected to reach $2.5 trillion, equivalent to more than 3.4% of the world’s GDP in 2013. It is linked with significant financial harm, manufacturing pollution, and safety issues. An electrochemical process primarily induces metal corrosion at the metalelectrolyte interface region, caused by steel oxidation and the reduction of oxygen, protons, and water. Therefore, organic and epoxy coatings can be applied as protective coatings. Additionally, it… More > Graphic Abstract

    A Review of Graphene Oxide Crosslinking as Enhanced Corrosion Shield Application

  • Open Access

    ARTICLE

    Study on the Hydration and Physical Properties of Cement by M18 Polycarboxylate Superplasticizer Modified Graphene Oxide

    Dalong Liao, Dongxu Li*, Shun Zhou, Xiaotao Zhang, Ying Fang*

    Journal of Renewable Materials, Vol.11, No.2, pp. 625-641, 2023, DOI:10.32604/jrm.2022.022501

    Abstract Graphene oxide (GO) as a new nano-enhancer in cement-based materials has gained wide attention. However, GO is easy to aggregate in alkaline cement mortar with poor dispersibility. This hinders its application in practical infrastructure construction. In this work, GO-M18 polycarboxylate compound superplasticizer (GM) were obtained by compounding the M18 polycarboxylate superplasticizer with GO solution at different mass ratios. The dispersion of GM in alkaline solution was systematically studied. The phases and functional groups of GM were characterized by XRD and FTIR. The effects of GM on the cement mortar hydration and the formation of microstructure… More > Graphic Abstract

    Study on the Hydration and Physical Properties of Cement by M18 Polycarboxylate Superplasticizer Modified Graphene Oxide

  • Open Access

    ARTICLE

    Silk Fibroin-Based Hydrogel for Multifunctional Wearable Sensors

    Yiming Zhao1,2, Hongsheng Zhao3, Zhili Wei4, Jie Yuan1, Jie Jian1, Fankai Kong1, Haojiang Xie1, Xingliang Xiong1,2,*

    Journal of Renewable Materials, Vol.10, No.11, pp. 2729-2746, 2022, DOI:10.32604/jrm.2022.019721

    Abstract The flexible wearable sensors with excellent stretchability, high sensitivity and good biocompatibility are signifi- cantly required for continuously physical condition tracking in health management and rehabilitation monitoring. Herein, we present a high-performance wearable sensor. The sensor is prepared with nanocomposite hydrogel by using silk fibroin (SF), polyacrylamide (PAM), polydopamine (PDA) and graphene oxide (GO). It can be used to monitor body motions (including large-scale and small-scale motions) as well as human electrophysiological (ECG) signals with high sensitivity, wide sensing range, and fast response time. Therefore, the proposed sensor is promising in the fields of rehabilitation, More >

  • Open Access

    ARTICLE

    Development of Magnetite/Graphene Oxide Hydrogels from Agricultural Wastes for Water Treatment

    Hebat-Allah S. Tohamy, Mohamed El-Sakhawy, Samir Kamel*

    Journal of Renewable Materials, Vol.10, No.7, pp. 1889-1909, 2022, DOI: 10.32604/jrm.2022.019211

    Abstract A novel magnetic hydrogel loaded with graphene oxide (GO) was developed in this study. Firstly, GO was prepared from bagasse through a single step via oxidation in the presence of ferrocene under muffled atmospheric conditions, followed by the loading of different amounts of magnetite onto GO via co-precipitation reaction of iron onto GO sheets. Finally, the 2-acrylamido-2-methyl-1-propane sulfonic acid was grafted onto carboxymethyl cellulose in the presence of magnetite GO and N, N′-methylenebisacrylamide as crosslinker yielded hydrogel. The structure, morphological, and thermal behavior of the prepared hydrogels were investigated. In addition, the adsorption performance of More > Graphic Abstract

    Development of Magnetite/Graphene Oxide Hydrogels from Agricultural Wastes for Water Treatment

  • Open Access

    ARTICLE

    Strong and Tough PAm/SA Hydrogel with Highly Strain Sensitivity

    Lingqin Zhang, Qifeng Jiang, Yiming Zhao, Jie Yuan, Xiaoying Zha, Haojiang Xie, Fankai Kong, Xingliang Xiong*

    Journal of Renewable Materials, Vol.10, No.2, pp. 415-430, 2022, DOI:10.32604/jrm.2022.016650

    Abstract The hydrogel is a preferred material for flexible wearable sensors. In practical application, it should have high-efficiency mechanical toughness and self-healing performance. Besides, hydrogel requires good affinity and adhesion because of its contact with the skin. In this experiment, we made an ultra-tough hydrogel with excellent cell affinity and adhesion. We used sodium alginate (SA) and polyacrylamide (PAm) mixture as a flexible base fluid. Polydopamine reduce graphene oxide (prGO) was used as conductive nanofiller, and then PAm-prGO-SA semi-interpenetrating network hydrogel was formed through Am radical polymerization. The presence of prGO endows the hydrogels with excellent More >

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