Synthesis, characterization and bending behavior of electroresponsive sodium alginate/poly(acrylic acid) interpenetrating network films under an electric field stimulus

Bekin, Seda; Sarmad, Shokat; Gürkan, Koray; Keçeli, Gönül; Gürdağ, Gülten

doi:10.1016/j.snb.2014.06.051

Cited by 70 publications

(38 citation statements)

References 68 publications

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“…The structures of the SA and SASI nanocomposite films prepared by in situ synthesis were verified through XRD analysis, and the results are shown in Figure (A), respectively. The amorphous structure of SA was confirmed by the broad diffraction peaks at 2θ = 14.2° of the SA film . However, a new diffraction peak at 2θ = 22.1° was observed in the XRD of the SASI films; this was attributed to the diffraction of amorphous nano‐SiO 2 particles .…”

Section: Resultsmentioning

confidence: 87%

Preparation and property investigation of crosslinked alginate/silicon dioxide nanocomposite films

Yang

Xia

Wang

et al. 2016

J of Applied Polymer Sci

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Crosslinked nanocomposite films of sodium alginate (SA) and silicon dioxide (SiO2) with different SiO2 loading values were prepared by in situ synthesis. Biocomposite films were produced by solution casting and solvent evaporation with glycerol as the plasticizer and calcium chloride as the crosslinking agent. The effects of the addition of nano silicon dioxide (nano‐SiO2) in SA on the microstructural, physical, mechanical, and optical properties of the nanocomposite films were characterized. The results show that nano‐SiO2 was dispersed homogeneously in the SA matrix; it thereby formed a strong interfacial interaction between the nano‐SiO2 particles and the matrix. The transparency of the bionanocomposite films was enhanced. Thermogravimetric analysis also revealed that nano‐SiO2 improved the thermal stability of the SA films. The incorporation of SiO2 further reduced the water vapor permeability and swelling degree and significantly increased the tensile strength and elongation, which are parameters important for packaging industries. Finally, the lower light transmission of UV light from 200 to 250 nm indicated that SA/SiO2 nanocomposite films could potentially be used to prevent lipid damage by UV light in food conservation. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43489.

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Section: Resultsmentioning

confidence: 87%

Preparation and property investigation of crosslinked alginate/silicon dioxide nanocomposite films

Yang

Xia

Wang

et al. 2016

J of Applied Polymer Sci

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“…As a result, the relationship between network structure, chain dynamics and bulk properties of cross-linked polymers has been widely studied in the literature using different techniques for a wide range of material systems. [8][9][10][11][12][13] In particular, the dielectric relaxation spectroscopy (DRS) is where  * is the  relaxation time, i.e.  *   and KWW parameter is the stretch exponent that lies in the range 0-1 and quantifies the extent of deviation from pure exponentially, i.e.…”

Section: Effect Of Cross-linking On the Molecular Dynamics Of The Segmentioning

confidence: 99%

The effect of cross-linking on the molecular dynamics of the segmental and β Johari–Goldstein processes in polyvinylpyrrolidone-based copolymers

et al. 2015

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Royal Society of ChemistryRedondo Foj, MB.; Sanchis Sánchez, MJ.; Ortiz Serna, MP.; Carsí Rosique, M.; García, JM.; García, FC. (2015). The effect of cross-linking on the molecular dynamics of the segmental and Johari-Goldstein processes in polyvinylpyrrolidone-based copolymers. Soft Matter. 11:7171-7180. doi:10.1039/c5sm00714c. The effect of the cross-link density on the molecular dynamics of copolymers composed of vinylpyrrolidone (VP) and butyl acrylate (BA) was studied using differential scanning calorimetry (DSC) and dielectric relaxation spectroscopy (DRS). A single glass transition was detected by DSC measurements, showing good copolymer miscibility. The dielectric spectra exhibit conductive processes and three dipolar relaxations labeled as ,  and  in decreasing order of decreasing temperatures. The cross-linker content affects both  and  processes, but the fastest  process is relatively unaffected. An increase of the cross-linking produces a typical effect on the  process dynamics: (i) the glass transition temperature is increased, (ii) the dispersion is broadened (iii) its strength is decreased and (iv) the relaxation times are increased. However, the  process, which is a Johari-Goldstein relaxation possesses typical features of pure Johari-Goldstein relaxation, unexpectedly loses the intermolecular character for the highest cross-linker content. . The basis of the CM is the existence of a temperature-insensitive crossover time, tc, which is about 2 ps for small molecules and polymeric glass formers 32,33 . At times shorter than t , there are basic molecular units that relax independently of each other, whose relaxation function can be described by a simple exponential decay: Effect of cross-linking on the molecular dynamics of the segmental and  Johari-Goldstein processes in Polyvinylpyrrolidone-based copolymersBelénBA (PBA) is hydrophobic and has a glass transition of 219K, while the PVP is an extremely hydrophilic polymer(uncross-linked PVP is water soluble), with glass transition of 448 K. Thus, copolymers comprised of VP and BA can be presented as tractable materials with moderate hydrophilicity and good mechanical and thermal properties. In addition to the copolymers, it is also highly interesting the study of cross-linked polymer networks. The dynamics of cross-linked polymers is influenced by the network composition and the polymer chain architecture. As it is well-known, both the glass-rubber and the subHowever, at times longer than tc, the intermolecular interactions (i.e. cooperativity 34 , which is associated with the dynamic heterogeneity) slow the relaxation. Thus, there is a coupling between the motions of the different basic molecular units. Therefore, the relaxation function assumes the Kohlrausch-Williams-Watts (KWW) equationglass transitions are highly sensitive to changes in the backbone structure, the cross-link density, and the introduction of pendant groups or branches. As a result, the relationship between network structure, chain dynamics and bulk properties of cross-l...

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“…Sodium alginate (NaAlg) is a natural polysaccharide extracted primarily from brown seaweed but also from bacteria. It is a linear anionic polysaccharide consisting of two kinds of hexuronic acid residues including 1,4‐β‐D‐mannuronic acid (M) and α‐L‐guluronic acid (G) residues, which are arranged in repeating GG (MM) blocks or alternating MG blocks . It has an abundance of free hydroxyl and carboxyl groups distributed along the polymer chain backbone that can be modified to alter the characteristics in comparison with the parent compounds .…”

Section: Introductionmentioning

confidence: 99%

“…It is a linear anionic polysaccharide consisting of two kinds of hexuronic acid residues including 1,4--D-mannuronic acid (M) and -L-guluronic acid (G) residues, which are arranged in repeating GG (MM) blocks or alternating MG blocks. 10,11 It has an abundance of free hydroxyl and carboxyl groups distributed along the polymer chain backbone that can be modified to alter the characteristics in comparison with the parent compounds. 12 NaAlg is known to form a hydrogel with the presence of divalent cations, such as calcium (Ca 2+ ), which act as crosslinkers between the functional groups of alginate chains.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of beta‐cyclodextrin‐grafted‐alginate and its application for removing methylene blue from water solution

Yang

Han

et al. 2014

J of Chemical Tech & Biotech

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BACKGROUND Beta‐cyclodextrin (β‐CD) has a hydrophilic exterior and a hydrophobic internal cavity which gives it the ability to form a host–guest complex. Sodium alginate (NaAlg) is a natural polysaccharide which can form a hydrogel in the presence of divalent cations. RESULTS The degree of substitution (DS) of the resulting β‐CD grafted alginate was 12%. The adsorption ratio of β‐CD to methylene blue (MB) was close to 2:1 which agreed with the theoretical value. The inclusion property of the Alg‐β‐CD/MB‐Ca hydrogel was excellent and stable. The hydrogel could be disintegrated easily with the aid of Na2CO3, and the Alg‐β‐CD sol obtained could be reused. CONCLUSION This study indicated that the method of aggregation–disintegration of the prepared hydrogel used to adsorb MB from water was effective and could be reused. © 2014 Society of Chemical Industry

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Synthesis, characterization and bending behavior of electroresponsive sodium alginate/poly(acrylic acid) interpenetrating network films under an electric field stimulus

Cited by 70 publications

References 68 publications

Preparation and property investigation of crosslinked alginate/silicon dioxide nanocomposite films

Preparation and property investigation of crosslinked alginate/silicon dioxide nanocomposite films

The effect of cross-linking on the molecular dynamics of the segmental and β Johari–Goldstein processes in polyvinylpyrrolidone-based copolymers

Synthesis of beta‐cyclodextrin‐grafted‐alginate and its application for removing methylene blue from water solution

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