Investigation on the effect of NH4Br at transport properties in k–carrageenan based biopolymer electrolytes via structural and electrical analysis

Zainuddin, N. K.; Samsudin, A. S.

doi:10.1016/j.mtcomm.2018.01.004

Cited by 57 publications

(24 citation statements)

References 54 publications

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“…1(b-d). These results are in agreement with those reported by Zainuddin and Samsudin [34] where the changes of peak intensity and band shift were due to the interaction between the polymer and dopant. In Fig.…”

Section: ■ Results and Discussionsupporting

confidence: 93%

Semirefined Carrageenan (SRC) Film Incorporated with α-Tocopherol and <i>Persicaria minor</i> for Meat Patties Application

et al. 2019

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Semirefined carrageenan (SRC) plasticized with glycerol (G) and incorporated with antioxidants of 0.4% (v/v) of α-tocopherol and Persicaria minor (PM) extract was successfully developed. The objective of this study is to analyze the antioxidant effect of active packaging films from semirefined carrageenan incorporated with α-tocopherol and Persicaria minor on meat patties. Total phenolic content and antioxidant activity of α-tocopherol and PM extract were measured. The effects of α-tocopherol and PM extract incorporated with SRC-based films on meat patties were evaluated using thiobarbituric acid reactive substance (TBARS) assay, metmyoglobin assay, and pH value for 14 days of storage. The films with 0.4% (v/v) of α-tocopherol and PM extract exhibited a lower lipid oxidation in meat patties compared with that of control (SRC film only, p < 0.05). Also, a brown color development of the meat patties of less than 50% was observed at the end of the 14-day storage. Meanwhile, the pH values for all samples decreased throughout the storage period with the SRC+G+α-tocopherol film showed the highest pH value. Hence, the formulation of SRC film with α-tocopherol or PM extract could be used as an alternative packaging for extending the shelf life of food product with high fat content.

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Section: ■ Results and Discussionsupporting

confidence: 93%

Semirefined Carrageenan (SRC) Film Incorporated with α-Tocopherol and <i>Persicaria minor</i> for Meat Patties Application

et al. 2019

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“…A relationship between the intensity of the XRD peaks and the crystallinity has been reported by numerous researchers [ 26 , 27 ]. The percentage of crystallinity (

) was calculated from the following relationship [ 28 , 29 ];

where

and

are the area under the crystalline peaks and the total area of the diffractogram, respectively, which were determined from the deconvolution of the XRD spectra using Fityk software [ 30 ]. The XRD pattern was fitted by Gaussian function mode.…”

Section: Resultsmentioning

confidence: 99%

Effect of High Ammonium Salt Concentration and Temperature on the Structure, Morphology, and Ionic Conductivity of Proton-Conductor Solid Polymer Electrolytes Based PVA

Saeed

Abdullah

2020

Membranes

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Polyvinyl alcohol (PVA) based proton-conducting solid polymer electrolyte was prepared with a high salt concentration of ammonium nitrate (NH4NO3) by the technique of solvent casting. From the X-ray diffraction studies, the semicrystalline nature of PVA with the inclusion of NH4NO3 was studied. XRD analysis indicates that the highest ion conductive sample exhibits the minimum crystalline nature. The decreasing trend of Jonscher-exponent with temperature rise reveals that the present system is insured by the correlated barrier hopping (CBH) model. The maximum room temperature conductivity was found to be 5.17 × 10−5 S/cm for PVA loaded 30 wt.% of NH4NO3. The ionic transport of the proton-conducting solid polymer electrolyte was studied at the temperature range of 303–353 K. The conductivity-temperature relationship of the systems was analyzed using both the Arrhenius and Vogel–Tammann–Fulcher (VTF) models to explain the ionic hopping mechanism for the system.

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“…The XRD patterns of PVA, CMC, P/C, P/N, P/C/N, and Na 2 CO 3 are shown in Figure 3. The crystallinity (X c ) of the obtained films was determined from the equation X c = A c /(A c + A a ) × 100 (where A c and A a are the peak intensities of crystalline and amorphous cellulose, respectively) [30]. The results are shown in Table 2.…”

Section: Xrd Analysismentioning

confidence: 99%

Effect of Na2CO3 on the Microstructure and Macroscopic Properties and Mechanism Analysis of PVA/CMC Composite Film

Zhu

Che³

et al. 2020

Polymers

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Polyvinyl alcohol (PVA)/carboxyl methyl cellulose sodium (CMC)/Na2CO3 composite films with different contents of Na2CO3 were prepared by blending and solution-casting. The effect of Na2CO3 on the microstructure of PVA/CMC composite film was analyzed by Fourier-transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), differential scanning calorimetry (DSC), and atomic force microscopy (AFM). Its macroscopic properties were analyzed by water sorption, solubility, and dielectric constant tests. The results show that the microstructure of PVA/CMC/Na2CO3 composite films was different from that of PVA and PVA/CMC composite films. In addition, compared to PVA and PVA/CMC composite films, the water sorption of PVA/CMC/Na2CO3 composite films relatively increased, the solubility in water significantly decreased, and the dielectric properties significantly improved. All these results indicate that the hydrogen bonding interaction between PVA and CMC increased and the crystallinity of PVA decreased after the addition of Na2CO3. This was also a direct factor leading to increased water sorption, decreased solubility, and enhanced dielectric properties. The reaction mechanism of PVA, CMC, and Na2CO3 is proposed to further evaluate the effect of Na2CO3 on the microstructure and macroscopic properties of PVA/CMC/Na2CO3 composite films.

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Investigation on the effect of NH4Br at transport properties in k–carrageenan based biopolymer electrolytes via structural and electrical analysis

Cited by 57 publications

References 54 publications

Semirefined Carrageenan (SRC) Film Incorporated with α-Tocopherol and <i>Persicaria minor</i> for Meat Patties Application

Semirefined Carrageenan (SRC) Film Incorporated with α-Tocopherol and <i>Persicaria minor</i> for Meat Patties Application

Effect of High Ammonium Salt Concentration and Temperature on the Structure, Morphology, and Ionic Conductivity of Proton-Conductor Solid Polymer Electrolytes Based PVA

Effect of Na2CO3 on the Microstructure and Macroscopic Properties and Mechanism Analysis of PVA/CMC Composite Film

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