Borhan Albiss^*, Asala Saleh

Journal of Renewable Materials, Vol.12, No.7, pp. 1219-1236, 2024, DOI:10.32604/jrm.2024.050685 - 21 August 2024

Abstract In this work, the fabrication and characterization of the nanocomposite hydrogel, as a solid electrode in electrochemical cell and gel electrolyte material using Indium titanium oxide/polyethylene terephthalate (ITO/PET) flexible substrate for double-layer supercapacitors have been reported. The nanocomposite hydrogel composed of Arabic gum (AG), Acrylic acid (AA), reduced graphene oxide (RGO), and silver nanoparticles (AgNPs) was fabricated via a physical cross-linked polymerization reaction, in which the ascorbic acid was used as a reducing agent to generate AgNPs and to convert Graphene oxide (GO) to RGO during the polymerization reaction. The morphology and structural characteristics of… More > Graphic Abstract

Xiaoyu Chen^*

Journal of Renewable Materials, Vol.12, No.4, pp. 815-826, 2024, DOI:10.32604/jrm.2024.048470 - 12 June 2024

Abstract A novel core-shell hydrogel bead was fabricated for effective removal of methylene blue dye from aqueous solutions. The core, made of sodium alginate-g-polyacrylamide and attapulgite nanofibers, was cross-linked by Calcium ions (Ca). The shell, composed of a chitosan/activated carbon mixture, was then coated onto the core. Fourier transform infrared spectroscopy confirmed the grafting polymerization of acrylamide onto sodium alginate. Scanning electron microscopy images showed the core-shell structure. The core exhibited a high water uptake ratio, facilitating the diffusion of methylene blue into the core. During the diffusion process, the methylene blue was first adsorbed by More > Graphic Abstract

Mesfer AI Duhayyim¹, Fahd N. Al-Wesabi², Radwa Marzouk³, Abdalla Ibrahim Abdalla Musa⁴, Noha Negm⁵, Anwer Mustafa Hilal⁶, Manar Ahmed Hamza^6,*, Mohammed Rizwanullah⁶

CMC-Computers, Materials & Continua, Vol.71, No.2, pp. 4135-4149, 2022, DOI:10.32604/cmc.2022.022336 - 07 December 2021

Abstract Internet of Medical Things (IoMT) is a breakthrough technology in the transfer of medical data via a communication system. Wearable sensor devices collect patient data and transfer them through mobile internet, that is, the IoMT. Recently, the shift in paradigm from manual data storage to electronic health recording on fog, edge, and cloud computing has been noted. These advanced computing technologies have facilitated medical services with minimum cost and available conditions. However, the IoMT raises a high concern on network security and patient data privacy in the health care system. The main issue is the… More >

Anwer Mustafa Hil¹, Fahd N. Al-Wesabi², Hadeel Alsolai³, Ola Abdelgney Omer Ali⁴, Nadhem Nemri⁵, Manar Ahmed Hamza^1,*, Abu Sarwar Zamani¹, Mohammed Rizwanullah¹

CMC-Computers, Materials & Continua, Vol.71, No.2, pp. 3921-3936, 2022, DOI:10.32604/cmc.2022.022301 - 07 December 2021

Abstract Social media is a platform in which user can create, share and exchange the knowledge/information. Social media marketing is to identify the different consumer's demands and engages them to create marketing resources. The popular social media platforms are Microsoft, Snapchat, Amazon, Flipkart, Google, eBay, Instagram, Facebook, Pin interest, and Twitter. The main aim of social media marketing deals with various business partners and build good relationship with millions of customers by satisfying their needs. Disruptive technology is replacing old approaches in the social media marketing to new technology-based marketing. However, this disruptive technology creates some… More >

Jin Yang^1,2, Wen Liang¹, Xingyang He^1,2,*, Ying Su^1,2, Fulong Wang¹, Tie Wang¹, Jianxiang Huang¹

FDMP-Fluid Dynamics & Materials Processing, Vol.18, No.1, pp. 15-27, 2022, DOI:10.32604/fdmp.2022.018135 - 10 November 2021

Abstract A solution polymerization method has been used to synthesize a polyacrylic-type superabsorbent polymer (SAP). The influence of various influential factors, such as the temperature, neutralization degree, cross-linking agent, and initiator, on the water absorption capacity of SAP has been investigated. The results show that the absorption can display a non-monotonic behavior depending on the synthesis conditions. The absorption can also change according to the pH, ion types and ion concentration. As the pH value increases, the water absorption capacity decreases significantly. It also decreases if the Na⁺ concentration becomes higher and becomes particularly low in solutions More >

Hamed Younesi-Kordkheili^1,*, Antonio Pizzi²

Journal of Renewable Materials, Vol.10, No.2, pp. 237-246, 2022, DOI:10.32604/jrm.2022.017851 - 30 August 2021

Abstract The aim of this research was to investigate the effect of ionic liquid treated lignin-based polyacid as a catalyst for urea-formaldehyde (UF) resins. Esterification of lignin was carried out, without any catalyst, with anhydride maleic and 1-butyl-3-methylimidazolium hydrogen sulfate [Bmim][HSO₄] as acidic ionic liquid to form maleated lignin-based polyacids (MA-IL). The performance of MA-IL as UF resin catalyst was respectively compared to hyroxymethylated lignin-based polyacid (MA-HL) and to NH₄Cl. The FTIR analysis indicated that the proportion of -COOH and C-O bonds increased due to the esterification of lignin with ionic liquid rather than its hyroxymethylation. Physicochemical… More >

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 - 30 August 2021

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 >

Enas H. Ali, Juman A. Naser^*, Zainab W. Ahmed, Taki A. Himdan

Journal of Renewable Materials, Vol.9, No.11, pp. 1927-1939, 2021, DOI:10.32604/jrm.2021.015624 - 04 June 2021

Abstract Polymeric nanofibers are a promising technology to protect the metal surfaces from corrosion. Through the literature search, the use of polyacrylonitrile nanofibres (PANNFs) as a corrosion inhibitor coating for aluminum alloys has not been evaluated. This work includes the development of a new, lightweight, high surface area and efficient coating of PANNFs that produced using electrospinning process to resist the corrosion of aluminum alloys (AA5083) which immersed in 0.6 M NaCl at alkaline medium (pH = 12) and acidic medium (pH = 1) at a range of temperatures (293–323) K. The PANNFs coating was successfully… More >

Shengquan Zhou¹, Minjie Shi^1,*, Wei Chen¹, Yongfei Zhang¹, Weijian Wang¹, Haojin Zhang¹, Dongwei Li²

Journal of Renewable Materials, Vol.9, No.11, pp. 1941-1957, 2021, DOI:10.32604/jrm.2021.015693 - 04 June 2021

Abstract The characteristics of soil treated with cationic polyacrylamide (CPAM) mass content of 0%, 0.2%, 0.4%, 0.6%, 0.8%, and 1% were investigated through a series of laboratory tests to explore the practical engineering effect of an expansive soil amended with environmental protection material CPAM. The results indicate that with the increasing CPAM content, the liquid limit and plasticity index of soil decrease, the plastic limit increases, and the free swelling ratio and loaded swelling ratio decrease. Besides, the improved soil has less disintegrating property and better water stability. The shear strength increases as the content increases,… More > Graphic Abstract

Zheng Cao^1,2,3,4,*, Yang Zhang², Keming Luo², Yinqiu Wu², Hongxin Gao², Junfeng Cheng^2,*, Chunlin Liu^2,3, Guoliang Tao², Qingbao Guan¹, Lei Zhang⁵

Journal of Renewable Materials, Vol.9, No.8, pp. 1447-1462, 2021, DOI:10.32604/jrm.2021.015593 - 08 April 2021

Abstract

The preparation and application of functional hydrogels based on natural polysaccharides have always been a hot research topic. In this study, using acrylamide (AM) monomer, N, N'-methylene bisacrylamide (MBA) as cross-linking agent, potassium persulfate (K₂S₂O₈) as initiator, in the presence of natural polysaccharide sodium alginate (SA), the PAM/SA hydrogel was prepared by free radical polymerization. Fourier transform infrared spectroscopy (FT-IR), swelling performance tests, scanning electron microscope (SEM), thermogravimetric analysis (TGA), UV-visible spectrophotometer, mechanical property measurements were carried out to analyze the composition, morphology, and performance of the hydrogels. The swelling behavior, dye adsorption performance, and the

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