Development of novel cellulose acetate-g-poly(sodium 4-styrenesulfonate) proton conducting polyelectrolyte polymer

Shalaby, Asmaa Attya; Elmageed, Mohamed Hussien Abd; Malash, Gihan F.; Tamer, Tamer Mahmoud; Omer, Ahmed M.; Mohyeldin, M.S.; Khalifa, Randa E.

doi:10.1016/j.jscs.2021.101327

Cited by 11 publications

(3 citation statements)

References 48 publications

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“…These results may be attributed to the grafting of novel functional groups into the cellulose acetate chain. These functional groups are more vulnerable to thermal degradation at higher temperatures, resulting in a decrease in thermal stability [ 57 , 58 ], and the CA-M100 sample with a higher content of urethane–methacrylic units are more susceptible to thermal decomposition. Moreover, the high number of functional groups of CA-M100 can restrict the mobility of polymer chains, with the derivative becoming more rigid and less able to dissipate heat, and, thus, resulting in a loss in thermal stability.…”

Section: Resultsmentioning

confidence: 99%

Photopolymerization Pattern of New Methacrylate Cellulose Acetate Derivatives

Trifan,

Chibac-Scutaru,

Melinte

et al. 2024

Polymers

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Polymeric photocrosslinked networks, of particular interest in the design of materials with targeted characteristics, can be easily prepared by grafting light-sensitive moieties, such as methacrylates, on polymeric chains and, after photochemical reactions, provide materials with multiple applications via photopolymerization. In this work, photopolymerizable urethane–methacrylate sequences were attached to free hydroxyl units of cellulose acetate chains in various proportions (functionalization degree from 5 to 100%) to study the properties of the resulting macromolecules and the influence of the cellulosic material structure on the double bond conversion degree. Additionally, to manipulate the properties of the photocured systems, the methacrylate-functionalized cellulose acetate derivatives were mixed with low molecular weight dimethacrylate derivatives (containing castor oil and polypropylene glycol flexible chains), and the influence of UV-curable composition on the photopolymerization parameters being studied. The achieved data reveal that the addition of dimethacrylate comonomers augmented the polymerization rates and conversion degrees, leading to polymer networks with various microstructures.

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Section: Resultsmentioning

confidence: 99%

Photopolymerization Pattern of New Methacrylate Cellulose Acetate Derivatives

Trifan,

Chibac-Scutaru,

Melinte

et al. 2024

Polymers

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“…The grafted membrane was first prepared according to our previous work [21]. In brief, CA (10 wt.%) was magnetically stirred while being dissolved in acetone, then a fixed weight of KPS was added (0.075 g) and stirred for 10 min, followed by the inclusion of Na-SSA (1.5 g).…”

Section: Preparation Of Grafted Cellulose Acetate/graphene Oxide Comp...mentioning

confidence: 99%

An Effective Methanol-Blocking Cation Exchange Membrane Modified with Graphene Oxide Nanosheet for Direct Methanol Fuel Cells

et al. 2023

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Herein, graphene oxide nanosheets (GO) were synthesized and employed as an additive at various proportions to fabricate a novel cation exchange membrane based on grafted cellulose acetate with sodium 4-styrenesulfonate (GCA) via a solution casting method for direct methanol fuel cell (DMFC) applications. The structure of composite membranes has been examined using FTIR, TGA, SEM, and DSC. The physicochemical properties of the GCA/GO membranes, such as ion exchange capacity, water uptake, mechanical and chemical stability, methanol permeability, and proton conductivity, were measured. The inclusion of GO significantly improved the ability to block methanol, contributing to the observed effects. Among the several composite membranes developed, GCA/GO (2 wt.%) had the highest selectivity with a water uptake of 45%, proton conductivity of 5.99 × 10−3 S/cm, methanol permeability of 1.12 × 10−7 cm2/s, and electrical selectivity of 26.39 × 103 Ss/cm3. Simultaneously, the composite membranes’ mechanical, oxidative, and thermal stabilities were also enhanced. Single-cell estimation using a 2 wt.% GO modified membrane demonstrated a maximum power density of 31.85 mW.cm−2 at 30 °C. Overall, these findings highlight the perspective of the application of these developed membranes in the DMFC.

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“…Nevertheless, unmodified CA has a low ion exchange capacity, indicating its poor proton conductivity, which renders it unsuitable for use as a membrane in fuel cells. In order to rectify these drawbacks, many researchers have created CA-based membranes for fuel cell applications by either introducing inorganic fillers/additives or functional groups to the CA polymer or by fabricating it with another proton-conductive polymer, thereby expanding its potential as a proton exchange membrane (PEM) in fuel cells [ 17 , 18 , 19 , 20 , 21 , 22 ]. Henceforth, many studies have incorporated inorganic fillers such as silicon dioxide (SiO 2 ), graphene oxide (GO), zirconium dioxide (ZrO 2 ), titanium dioxide (TiO 2 ), and carbon nanotubes (CNTs) into the membrane matrix for enhancing the membrane performance.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Cellulose Acetate-Based Proton Exchange Membrane with Sulfonated SiO2 and Plasticizers for Microbial Fuel Cell Applications

Palanisamy,

Im,

Muhammed

et al. 2023

Membranes

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Developing a hybrid composite polymer membrane with desired functional and intrinsic properties has gained significant consideration in the fabrication of proton exchange membranes for microbial fuel cell applications. Among the different polymers, a naturally derived cellulose biopolymer has excellent benefits over synthetic polymers derived from petrochemical byproducts. However, the inferior physicochemical, thermal, and mechanical properties of biopolymers limit their benefits. In this study, we developed a new hybrid polymer composite of a semi-synthetic cellulose acetate (CA) polymer derivate incorporated with inorganic silica (SiO2) nanoparticles, with or without a sulfonation (–SO3H) functional group (sSiO2). The excellent composite membrane formation was further improved by adding a plasticizer (glycerol (G)) and optimized by varying the SiO2 concentration in the polymer membrane matrix. The composite membrane’s effectively improved physicochemical properties (water uptake, swelling ratio, proton conductivity, and ion exchange capacity) were identified because of the intramolecular bonding between the cellulose acetate, SiO2, and plasticizer. The proton (H+) transfer properties were exhibited in the composite membrane by incorporating sSiO2. The composite CAG–2% sSiO2 membrane exhibited a higher proton conductivity (6.4 mS/cm) than the pristine CA membrane. The homogeneous incorporation of SiO2 inorganic additives in the polymer matrix provided excellent mechanical properties. Due to the enhancement of the physicochemical, thermal, and mechanical properties, CAG–sSiO2 can effectively be considered an eco-friendly, low-cost, and efficient proton exchange membrane for enhancing MFC performance.

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Development of novel cellulose acetate-g-poly(sodium 4-styrenesulfonate) proton conducting polyelectrolyte polymer

Cited by 11 publications

References 48 publications

Photopolymerization Pattern of New Methacrylate Cellulose Acetate Derivatives

Photopolymerization Pattern of New Methacrylate Cellulose Acetate Derivatives

An Effective Methanol-Blocking Cation Exchange Membrane Modified with Graphene Oxide Nanosheet for Direct Methanol Fuel Cells

Fabrication of Cellulose Acetate-Based Proton Exchange Membrane with Sulfonated SiO2 and Plasticizers for Microbial Fuel Cell Applications

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