uv-induced synthesis of chitosan- g -polyacrylamide semi

UV-induced synthesis of chitosan- g -polyacrylamide semi

Superabsorbent hydrogels of chitosan-g-polyacrylamide with N,N′-methylene-bis-acrylamide as a crosslinker were prepared via UV irradiation in the absence of photoinitiator under homogeneous conditions. The product was characterized by Fourier transform infrared spectroscopy, differential scanning calorimetry, and scanning electron microscopy to confirm the formation of hydrogels.

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uv-induced synthesis of chitosan-g-polyacrylamide

UV-induced synthesis of chitosan-g-polyacrylamide

UV-induced synthesis of chitosan-g-polyacrylamide semi-IPN superabsorbent hydrogels

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uv-induced synthesis of chitosan-g-polyacrylamide

UV-induced synthesis of chitosan-g-polyacrylamide

UV-induced synthesis of chitosan-g-polyacrylamide semi-IPN superabsorbent hydrogels Article (PDF Available) in Polymer Bulletin 68(6):1623-169 · April 2012 with 623 Reads How we measure 'reads'

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uv-induced synthesis of chitosan-g-polyacrylamide

UV-induced synthesis of chitosan-g-polyacrylamide

UV-induced synthesis of chitosan-g-polyacrylamide semi-IPN superabsorbent hydrogels

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mustafa gazi

Mustafa Gazi

ORIGINAL PAPER UV-induced synthesis of chitosan-g-polyacrylamide semi-IPN superabsorbent hydrogels Samaneh Saber-Samandari • Mustafa Gazi • Elvan Yilmaz Received: 21 June 2011/Revised: 21

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ultraviolet-assisted synthesis of polyacrylamide-grafted

Ultraviolet-assisted synthesis of polyacrylamide-grafted

In the present work, a new flocculant, polyacrylamide-grafted chitosan nanoparticles (NCS-g-PAM), was synthesized by the copolymerization of acrylamide (AM) and chitosan nanoparticle (NCS) under ultraviolet irradiation using 2-hydroxy-4′-(2-hydroxyethoxy)-2-methylpropiophenone as photo-initiator.The NCS was prepared by the ionic gelation between chitosan and sodium tripolyphosphate.

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synthesis and characterization of modified chitosan

Synthesis and characterization of modified chitosan

The synthesis of the grafted polymer was achieved by K 2 S 2 O 8 ‐induced free‐radical polymerization. Microspheres of polyacrylamide‐ g ‐chitosan crosslinked with glutaraldehyde were prepared to encapsulate nifedipine (NFD), a calcium channel blocker and an antihypertensive drug.

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facile preparation of polyacrylamide/chitosan/fe3o4

Facile preparation of polyacrylamide/chitosan/Fe3O4

S. Saber-Samandari, M. Gazi, E. YilmazUV-induced synthesis of chitosan-g-polyacrylamide semi-IPN superabsorbent hydrogels Polymer Bulletin, 68 (2012), pp. 1623-1639 Google Scholar

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reduction of ag+ on polyacrylate chains in aqueous solution

Reduction of Ag+ on Polyacrylate Chains in Aqueous Solution

Silver ions are reduced in aqueous solutions that contain sodium polyacrylate or partly carboxylated polyacrylamide or glutaric acid. The reducing agent is the hydrated electron (generated γ-radiolytically) or hydrogen. Complexes of small silver clusters with the polyelectrolyte are formed in the early stages of reduction, the color of the solutions varying from rose to green or blue

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functionalized graphene oxide with chitosan for protein

Functionalized Graphene Oxide with Chitosan for Protein

Functionalized Graphene Oxide with Chitosan for Protein Nanocarriers to Protect against Enzymatic Cleavage and Retain Collagenase Activity. Sci. Rep. 7 , 42258; doi: 10.1038/srep42258 (2017).

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chitosan-based n-doped carbon materials

Chitosan-Based N-Doped Carbon Materials

Chitosan-derived N-doped carbon materials are attractive candidates for the preparation of catalysts with a wide range of applications. Chitosan is a nitrogen rich (∼7 wt %) renewable biomass resource derived from seafood waste. Nitrogen-containing functional groups (amine and acetamide) of chitosan make it a suitable precursor for the synthesis of N-doped carbon materials. This perspective

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development and characterization of photoinduced

Development and Characterization of Photoinduced

3.2. FTIR Spectroscopy. Chemical structures and chain conformations are characterized by ATR-FTIR spectroscopy. Figure 3(a) shows spectra in the characteristic region of O-H and N-H stretching and C=O overtone modes. Sharp bands, located at 3700–3450 cm −1, are associated with overtone combination modes.Difference spectra are also shown to provide clearer spectral changes.

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chitosan based antimicrobial films for food packaging

Chitosan based antimicrobial films for food packaging

AbstractAntimicrobial packaging is one of the most promising active packaging systems. Antimicrobial packaging is the packaging system that is able to kill or inhibit spoilage and pathogenic microorganisms that are contaminating foods. A tremendous effort has been made over the last decade to develop and test films with antimicrobial properties to improve food safety and shelf life.

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polymer.zju.edu.cn

polymer.zju.edu.cn

Chitosan Hydrogel Structure Modulated by Metal Ions 2016-10-25 Green synthesis of silver nanoparticles with high antimicrobial activity and low cytotoxicity using catechol-conjugated chitosan Huang, Xiaofei; Pang, Yichuan; Liu, Yalan; Zhou, Yi; Wang 王征科;胡

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synthesis and characterization of cis-5-norbornene-2,3

Synthesis and characterization of cis-5-norbornene-2,3

AbstractChitosan was chemically modified with bulky structure, cis-5- norbornene-2,3-dicarboxylic anhydride and the characteristics of this modified chitosan was studied. Fourier Transform Infrared results show that the anhydride monomer was successfully bound to amine group of chitosan. Thermal analysis of the modified structure provides N-acylated chitosan with improved thermal stability

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glycol chitosan nanoparticles as specialized cancer

Glycol chitosan nanoparticles as specialized cancer

Glycol chitosan nanoparticles as specialized cancer therapeutic vehicles: Sequential delivery of doxorubicin and Bcl-2 siRNA Skip to main content Thank you for visiting nature.com.

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synthesis, characterization and biological evaluation of a

Synthesis, characterization and biological evaluation of a

Synthesis, characterization and biological evaluation of a new photoactive hydrogel against Gram-positive and Gram-negative bacteria†. Cinzia Spagnul a, John Greenman b, Mark Wainwright c, Zeeniya Kamil b and Ross W. Boyle * a a Department of Chemistry, University of Hull, Kingston-upon-Hull, East Yorkshire, HU6 7RX, UK.

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polymer.zju.edu.cn

polymer.zju.edu.cn

Chitosan Hydrogel Structure Modulated by Metal Ions 2016-10-25 Green synthesis of silver nanoparticles with high antimicrobial activity and low cytotoxicity using catechol-conjugated chitosan Huang, Xiaofei; Pang, Yichuan; Liu, Yalan; Zhou, Yi; Wang 王征科;胡

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the synthesis and application of photoinitiators chitosan

The Synthesis and Application of Photoinitiators Chitosan

There is an Open Access version for this licensed article that can be read free of charge and without license restrictions. The content of the Open Access version may differ from

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biomedical applications of dna‐based hydrogels - gačanin

Biomedical Applications of DNA‐Based Hydrogels - Gačanin

2 Design of Nucleic Acid‐Based Hydrogels. DNA‐based hydrogels have been prepared based on different design principles. 28-31, 33 The selected design and preparation methods have a strong impact on the characteristic features of DNA hydrogels and thus determine their respective biomedical applications. In this section, we introduce 1) hydrogels that consist entirely of DNA, and 2) the usage

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current research on high‐energy ionizing radiation

Current research on high‐energy ionizing radiation

High‐energy ionizing radiation (HEIR) has diverse industrial uses and a high‐energy range that usually involves energies greater than 5 MeV. 2 In practice, gamma rays and EBs are commonly applied, and research on other HEIRs is slowly developing. Although gamma rays have a strong penetrating power, the absorbed dose rate is lower than that of EBs and difficult to control.

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chitosan based antimicrobial films for food packaging

Chitosan based antimicrobial films for food packaging

AbstractAntimicrobial packaging is one of the most promising active packaging systems. Antimicrobial packaging is the packaging system that is able to kill or inhibit spoilage and pathogenic microorganisms that are contaminating foods. A tremendous effort has been made over the last decade to develop and test films with antimicrobial properties to improve food safety and shelf life.

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an effective flocculation method to the kaolin wastewater

An Effective Flocculation Method to the Kaolin Wastewater

P(AM-DMC) (PAD) was synthesized by ultraviolet- (UV-) initiated copolymerization with methacryloxyethyl trimethyl ammonium chloride (DMC) and acrylamide (AM) as the monomers and initiator 2,2-azobis [2-(2-imidazolin-2-yl) propane] dihydrochloride (VA-044) as the photoinitiator. Parameters that affect the molecular weight were reviewed by using the single-factor approach.

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shape/size controlling syntheses, properties and applications

Shape/size controlling syntheses, properties and applications

Tian N, Zhou Z Y, Sun S G, Ding Y, Wang Z L. Synthesis of tetrahexahedral platinum nanocrystals with high-index facets and high electro-oxidation activity. Science, 2007, 316(5825): 732–735 doi: 10.1126/science.1140484 23

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synthesis, characterization and biological evaluation of a

Synthesis, characterization and biological evaluation of a

Synthesis, characterization and biological evaluation of a new photoactive hydrogel against Gram-positive and Gram-negative bacteria†. Cinzia Spagnul a, John Greenman b, Mark Wainwright c, Zeeniya Kamil b and Ross W. Boyle * a a Department of Chemistry, University of Hull, Kingston-upon-Hull, East Yorkshire, HU6 7RX, UK.

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insights into the mode of action of chitosan as an

Insights into the Mode of Action of Chitosan as an

Chitosan is a polysaccharide biopolymer that combines a unique set of versatile physicochemical and biological characteristics which allow for a wide range of applications. Although its antimicrobial activity is well documented, its mode of action has hitherto remained only vaguely defined. In this work we investigated the antimicrobial mode of action of chitosan using a combination of

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the synthesis and application of photoinitiators chitosan

The Synthesis and Application of Photoinitiators Chitosan

There is an Open Access version for this licensed article that can be read free of charge and without license restrictions. The content of the Open Access version may differ from

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synthesis of a cationic polyacrylamide under uv initiation

Synthesis of a Cationic Polyacrylamide under UV Initiation

Synthesis of a Cationic Polyacrylamide under UV Initiation and Its Flocculation in Estrone Removal International Journal of Polymer Science , Feb 2018 Jiaoxia Sun , Xiqin Ma , Xiang Li , Jianxin Fan , Qingkong Chen , Xuelian Liu , Jin Pan

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uv-b-induced signaling events leading to enhanced

UV-B-induced signaling events leading to enhanced

Suramin is known to bind with cell surface components such as the systemin receptor [] and interfere with the signaling events and this system is affected by UV-B irradiation in L. peruvianum cells [].Since UV-B irradiation of C. roseus cells caused alkalinization of the medium, we investigated whether suramin could inhibit the UV-B-induced medium alkalinization.

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radiation-induced acrylamide/4-vinyl pyridine biocidal

Radiation-Induced Acrylamide/4-Vinyl Pyridine Biocidal

(2017). Radiation-Induced Acrylamide/4-Vinyl Pyridine Biocidal Hydrogels: Synthesis, Characterization, and Antimicrobial Activities. Polymer-Plastics Technology and

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linseed hydrogel-mediated green synthesis of silver

Linseed hydrogel-mediated green synthesis of silver

Recently, polysaccharides are gaining importance as green reducing and self-capping agents for synthesis of Ag NPs.31,32 The film-forming properties of polysaccharides can be additionally used for preventing the coagulation of Ag NPs over long-term storage.33 Starch- and chitosan-based Ag NPs34,35 have been synthesized but it was difficult to

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development and characterization of photoinduced

Development and Characterization of Photoinduced

Polyacrylamide (PAm) is a nontoxic, low cost polymer produced from the radical polymerization of its vinyl monomer. During the synthesis, N,N'-methylenebisacrylamide can be applied to partially cross-link the polymer chains. This polymer shows its strong hydrophilic nature, due to the presence of polar amide groups.

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