Nanocrystalline cellulose composites with polyvinylpyrrolidone: Self-assembly and dispersibility in water

Воронова, М. И.; Суров, О. В.; Рублева, Н. В.; Кочкина, Н. Е.; Афинеевский, А. В.; Захаров, А. Г.

doi:10.1016/j.coco.2019.07.006

Cited by 15 publications

(5 citation statements)

References 22 publications

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“…The ease of PVP to be solved in water and many other non--aqueous liquids, with the duality of highly polar amide group within the pyrrolidone ring and a polar methylene and methane groups in the ring and along its backbone [11], allow this polymer to be a great stabilizer [12]. Due to these excellent properties, several reports have studied PVP as a composite with cellulose [13][14][15][16][17][18] or modification with cellulose-based material [19,20]. Radiation-induced grafting of cotton-cellulose [21] and cellulosic membrane [22] with pyrrolidine monomers has been prepared previously.…”

Section: Indukowane Promieniowaniem Gamma Szczepienie Celulozy Ze Sło...mentioning

confidence: 99%

Gamma-induced grafting of rice straw cellulose with polyvinylpyrrolidone

Suhartini

Tachrim²,

Anggarini

et al. 2022

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Cellulose obtained from rice straw was grafted with polyvinylpyrrolidone (Cell-g-PVP). The process was induced by simultaneous gamma iradiation (Co-60). The presence of the grafted PVP chains was confirmed by FT-IR, XRD and EDS methods. The influence of the iradiation dose (20 and 30 kGy) on the reaction efficiency and thermal stability of Cell-g-PVP was investigated. The grafting yield at the dose of 30 kGy was about 56%. The higher dose of radiation resulted in better thermal stability. The AAS results showed that Ni(II), Cu(II), and Cr(II) ions can be adsorbed by Cell-g-PVP. The order of ion metals adsorption capacity of Cell-g-PVP was Cu(II) > Ni(II) > Cr(II). The adsorption isotherm of Cu(II) metal ion using the Cell-g-PVP followed the Langmuir adsorption isotherm whereas the chemical adsorption and the adsorption energy were constant on all sides of the copolymer.

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Section: Indukowane Promieniowaniem Gamma Szczepienie Celulozy Ze Sło...mentioning

confidence: 99%

Gamma-induced grafting of rice straw cellulose with polyvinylpyrrolidone

Suhartini

Tachrim²,

Anggarini

et al. 2022

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“…PVP is a water-soluble, non-toxic amorphous nonionic polymer, with high solubility in polar solvents, widely used in the synthesis of nanoparticles [4] acting as a nanoparticle dispersant, growth modifier, and surface stabilizer, preventing agglomeration of nanoparticles [5]. Due to its amphiphilic nature, PVP can affect the morphology and growth of nanoparticles by providing solubility in various solvents, discriminative surface stabilization, controlled crystal growth, playing the role of a shape control agent and facilitating the growth of specific crystal faces, while preventing the growth others [5].…”

Section: Introductionmentioning

confidence: 99%

New PVP–Ag or Pd-Doped Perovskite Oxide Hybrid Structures for Water Splitting Electrocatalysis

Căta,

Țăranu,

Ienașcu

et al. 2024

Applied Sciences

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Global warming and the global energy crisis are two major challenges humanity is currently confronting that are pressuring the scientific community to find efficient, low-cost, and environmentally sustainable solutions. Within this context, hydrogen has emerged as a clean and efficient energy carrier promising to replace environmentally hazardous fossil fuels. The present study, of relevance to the water splitting domain, concerns the synthesis of two novel hybrid structures, namely polyvinylpyrrolidone (PVP) functionalized with Ag-doped LaMnO3 and Pd-doped LaMnO3, respectively. The water electrolysis catalytic activity of these new materials was evaluated in a strongly alkaline medium. Perovskite-based modified electrodes were manufactured through four different procedures. The samples displayed electrocatalytic activity for the O2 evolution reaction and the most active electrode was the one obtained by drop-casting a mixture of LaMnO3:Ag/PVP and Carbon Black on graphite support. The study is aimed at and succeeds in increasing the scientific database concerning the role of perovskite oxides in the water-splitting field.

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“…PVP is a water-soluble, non-toxic amorphous nonionic polymer, with high solubility in polar solvents, widely used in the synthesis of nanoparticles [4] acting as a nanoparticle dispersant, growth modifier, surface stabilizer, preventing agglomeration of nanoparticles [5]. Due to its amphiphilic nature, PVP can affect the morphology and growth of nanoparticles by providing solubility in various solvents, discriminative surface stabilization, controlled crystal growth, playing the role of a shape 2 control agent and facilitating the growth of specific crystal faces, while preventing the growth others [5].…”

Section: Introductionmentioning

confidence: 99%

“…KCl) reference electrode (V), ηOER and ηHER = O2 and H2 evolution overpotentials (V); η = overpotential (V); i = current density (mA/cm 2 ); b = Tafel slope (V/dec); Ip = peak current (A); n = number of electrons involved in the redox process at T = 298 K; A = surface of the working electrode (cm 2 ); D = diffusion coefficient of the electroactive species (cm 2 /s); C = concentration of the electroactive species (M) and v = scan rate (V/s). Equations ( 1) to (5) are found in the scientific literature [30][31][32], and in the case of the ferrocyanide/ferricyanide redox system used in the study, n = 1 and D has a theoretical value reported as 6.7 x 10 -6 cm 2 /s [33].…”

mentioning

confidence: 99%

New Hybrid Organic-Inorganic Structures for Water Splitting Electrocatalysts

Cata,

Taranu,

Ienașcu

et al. 2024

Preprint

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Global warming and the global energy crisis are two major challenges humanity is currently confronting that are pressuring the scientific community to find efficient, low cost and environmentally sustainable solutions. Within this context, hydrogen has emerged as a clean and efficient energy carrier promising to replace the environmentally hazardous fossil fuels. The present study, of relevance to the water splitting domain, concerns the synthesis of two novel hybrid structures, based on perovskite materials functionalized with polyvinylpyrrolidone (PVP). The water electrolysis catalytic activity of these new materials was evaluated in a strongly alkaline medium. Perovskite-based modified electrodes were manufactured through four different procedures. The samples displayed electrocatalytic activity for the O2 evolution reaction and the most active electrode was the one obtained by drop-casting a mixture of LaMnO3:Ag/PVP, Carbon Black and Nafion on graphite support. The study is aimed at and succeeds in increasing the scientific database concerning the role of perovskite oxides in the water splitting field.

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Nanocrystalline cellulose composites with polyvinylpyrrolidone: Self-assembly and dispersibility in water

Cited by 15 publications

References 22 publications

Gamma-induced grafting of rice straw cellulose with polyvinylpyrrolidone

Gamma-induced grafting of rice straw cellulose with polyvinylpyrrolidone

New PVP–Ag or Pd-Doped Perovskite Oxide Hybrid Structures for Water Splitting Electrocatalysis

New Hybrid Organic-Inorganic Structures for Water Splitting Electrocatalysts

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