Cellulose synthesis
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In this study, cellulose was first treated with 4-cyano-4-((phenyl carbonothioyl)solfanyl) pentanoic acid to serve as the reversible addition-fragmentation chain transfer polymerization (RAFT) agent, then the controlled grafting polymerization of acrylic acid was successfully performed.
8p dianmotminh02 03-05-2024 2 1 Download
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Ebook "Cellulose derivatives: Synthesis, structure, and properties" summarizes recent progress in cellulose chemistry. The last 10 years have witnessed important developments, because sustainability is a major concern. Biodegradable cellulose derivatives, in particular esters and ethers, are employed on a large scale. The recent developments in cellulose chemistry include unconventional methods for the synthesis of derivatives, introduction of novel solvents, e.g.
552p tracanhphuonghoa1007 22-04-2024 3 2 Download
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In ebook "Polysaccharide based graft copolymers" methods of grafting and applications of polysaccharide graft copolymers are briefly discussed. Synthesis, properties, and applications of different polysaccharide graft copolymers such as cellulose-g-copolymers, starch-g-copolymers, chitosan-g-copolymers, gum-g-copolymers, and dextrang-copolymers are reviewed.
357p coduathanh1122 27-03-2024 4 1 Download
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Ebook "Cellulose: Molecular and structural biology (Selected articles on the synthesis, structure, and applications of cellulose)" is an up-to-date treatise on the most advanced and provocative research into the biosynthesis, structure, and applications of Nature’s most abundant macromolecule and renewable resource, cellulose. Molecular, biochemical, and evolutionary aspects of cellulose biosynthesis are reviewed in a variety of living organisms, including cyanobacteria, eubacteria, vascular plants, and tunicates.
383p manmanthanhla0201 27-02-2024 4 2 Download
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Photocatalysis is considered to be one of the most promising strategies for reducing water pollution, a global issue that threatens the environment. The electro-spinning technique was used to synthesize Pt eAu/TiO2/BaFe12O19 nanofibers.
12p viberbers 09-08-2023 3 2 Download
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In this work, cellulose was successfully extracted from pineapple leaf waste by 0.75 M NaOH at 90oC and 5 M HNO3 at 70oC for 1.5h and 5h, respectively. The obtained cellulose fibres, with average diameters of 150-300 nm, were converted to carboxymethyl cellulose (CMC) by esterification.
6p vimalfoy 08-02-2023 5 2 Download
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Cellulose nanowhiskers (CNW) from cotton, was prepared by acid hydrolysis and purified using a size selection process to obtain homogeneous samples with average particle size of 270 nm and 85.5% crystallinity. Purified CNW was used as precursor to carbon nanoneedles (CNN) synthesis.
7p vihermione 06-01-2023 12 2 Download
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Imidazolium-based ionic liquids are important solvents for the processing of natural cellulose. Little is known about their use in synthesizing cellulose via bottom-up polymerization of β-1,4-D-glucosyl chains in solution. Here, we analyzed cellodextrin phosphorylase-catalyzed synthesis of cello-oligosaccharides, and the subsequent spontaneous self-assembly of the chains, in the presence of cellulose-dissolving ionic liquid, 1,3-dimethylimidazolium dimethyl phosphate ([Dmim]DMP) or 1-ethyl-3-methylimidazolium acetate ([Emim]OAc).
10p vihermione 30-12-2022 76 2 Download
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Whatman cellulosic filter paper was used as a substrate for the synthesis of two zeolitic imidazolate frameworks (ZIFs); ZIF-8 and ZIF-67 with and without 2,2,6,6-tetramethyl-1-piperidine oxoammonium salt (TEMPO)- oxidized cellulose nanofibril (TOCNF). All synthesis procedures take place at room temperature via a one-pot procedure.
7p viginny 30-12-2022 9 2 Download
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The implementation of cellulose as a green alternative to classical polymers sparks research on the synthesis of defined derivatives of this biopolymer for various high-tech applications. Apart from the scientific challenge, the in vitro synthesis of cellulose using a bottom-up approach provides specimens with absolutely accurate substituent patterns and degrees of polymerization, not accessible from native cellulose.
10p viginny 30-12-2022 14 3 Download
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An environmentally benign synthesis of a magnetically responsive carboxymethylated cellulose nanofibril-based material is reported. Applied experimental conditions lead to the in-situ formation of magnetite nanoparticles with primary particle sizes of 2.0–4.0 nm or secondary particles of 3.6–16.4 nm depending on whether nucleation occurred between individual carboxymethylated cellulose nanofibrils, or on exposed fibril surfaces.
9p viginny 30-12-2022 8 3 Download
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Nanoparticle-polymer composites are important functional materials but structural control of their assembly is challenging. Owing to its crystalline internal structure and tunable nanoscale morphology, cellulose is promising polymer scaffold for templating such composite materials.
12p viginny 30-12-2022 4 2 Download
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In the present work, a biosynthesis route for the preparation of hierarchical pompon-like SAPO-34 was developed. Commercially available bacterial cellulose aerogel was used as template. SiO2 loaded bacterial cellulose aerogel was used as silica source and a simple hydrothermal treatment was used for crystallization.
8p vironald 15-12-2022 3 2 Download
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Cellulose, one of the renewable and biodegradable polymers, has been extensively studied as a raw material for a newly and fully bio-based hydrogel. The synthesis of bio-hydrogel is based on the dissolution of extracted cellulose from rice straw in tetrabutylphosphonium hydroxide (TBPH) solvent followed by the gelation using epichlorohydrin (ECH) crosslinkers.
8p viporsche 25-10-2022 3 2 Download
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New superabsorbent hydrogels were synthesized through free radical graft copolymerization of partially neutralized acrylic acid (AA) and 2-acrylamido-2-methylpropanesulfonic acid (AMPS) onto carboxymethyl cellulose (CMC) backbones. The structure and morphology of the synthesized superabsorbent hydrogels were characterized by Fourier transform infrared spectroscopy and scanning electron microscope. The effect of the molar ratio of AMPS to AA, the APS concentration, and the CMC content on swelling ratio was optimized.
11p langthannam 29-12-2021 8 0 Download
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In general, the material’s properties sharply decrease under the pressure of ground conditions and the presence of salt minerals and fertilizer in the soil. Uncontrolled release of water is one of the main factors limiting their application in agriculture. Therefore, the target of this work is to determine the conditions for the synthesis of SAPs materials based on CMC with high water absorption while ensuring consistent gel stability. The BioSAP products are characterized by their properties and their ability to retain water in soil.
7p chauchaungayxua8 02-10-2020 42 0 Download
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Superabsorbent hydrogels show a large potential in a wide array of applications due to their unique properties. Carboxymethylcellulose (CMC) is a commercially available water-soluble cellulose derivative of major interest in the hydrogel synthesis.
10p vijiraiya2711 27-05-2020 10 0 Download
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Alfalfa (Medicago sativa L.) is a widely adapted perennial forage crop that has high biomass production potential. Enhanced cellulose content in alfalfa stems would increase the value of the crop as a bioenergy feedstock. We examined if increased expression of sucrose synthase (SUS; EC 2.4.1.13) would increase cellulose in stem cell walls.
13p vihashirama2711 21-05-2020 16 2 Download
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Thaxtomin A (TA) is a natural cellulose biosynthesis inhibitor (CBI) synthesized by the potato common scab-causing pathogen Streptomyces scabies. Inhibition of cellulose synthesis by TA compromises cell wall organization and integrity, leading to the induction of an atypical program of cell death (PCD)
13p viharuno2711 21-04-2020 10 0 Download
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Propionate is widely used as an important preservative and important chemical intermediate for synthesis of cellulose fibers, herbicides, perfumes and pharmaceuticals. Biosynthetic propionate has mainly been produced by Propionibacterium, which has various limitations for industrial application.
9p vihamax2711 21-04-2020 10 1 Download