Freezing/thawing effects on the exfoliation of montmorillonite in gelatin‐based bionanocomposite

Mu, Changdao; Li, Xinying; Zhao, Yige; Zhang, Hanguang; Wang, Liangjie; Li, Defu

doi:10.1002/app.38511

Cited by 29 publications

(23 citation statements)

References 43 publications

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“…For example, the freezing/thawing method was reported to be an effective approach to exfoliate MMT in gelatin matrix. In addition, it had the advantages for gelatin molecules to renature into triple-helix (Guo et al, 2013;Mu et al, 2013). On the other hand, there are a large number of SieOH groups on the surface of layered MMT, which can react with amineterminated organosilicon to obtain aminofunctionalized MMT (NH 2 -MMT) (Kim, Yi, Lee, Kim, Son, Bae, et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Development and characterization of dialdehyde xanthan gum crosslinked gelatin based edible films incorporated with amino-functionalized montmorillonite

Zhang

et al. 2015

Food Hydrocolloids

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Section: Introductionmentioning

confidence: 99%

Development and characterization of dialdehyde xanthan gum crosslinked gelatin based edible films incorporated with amino-functionalized montmorillonite

Zhang

et al. 2015

Food Hydrocolloids

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“…It shows that the TS values of all the composite films are significantly higher than that of pure gelatin film (ca. 2 MPa) . The significant increase in the TS could be due to the occurrence of cross‐linking between polygenipin and gelatin and the entanglement of polymer chains within the film matrix.…”

Section: Resultsmentioning

confidence: 98%

“…2 MPa). 43 The significant increase in the TS could be due to the occurrence of cross-linking between polygenipin and gelatin and the entanglement of polymer chains within the film matrix. Furthermore, Table V shows that the TS values of the composite films are increasing, while the EB values are decreasing from G-PG-7 to G-PG-10, which is induced by the longrange cross-linking between gelatin chains.…”

Section: Thermal Properties Of the Composite Filmsmentioning

confidence: 99%

Short‐range and long‐range cross‐linking effects of polygenipin on gelatin‐based composite materials

Liang

et al. 2016

J Biomedical Materials Res

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Genipin is an ideal cross-linking agent in biomedical applications, which can undergo ring-opening polymerization in alkaline condition. The polygenipin can create short-range and long-range intermolecular cross-linking between protein chains. In this article, the polygenipin with different degree of polymerization was successfully prepared and used to fix gelatin composite materials. The short-range and long-range cross-linking effects of polygenipin were systematically studied. The results show that the composite materials present porous structure with tunable pore sizes in the gel state, which can be easily controlled by adjusting the degree of polymerization of polygenipin. Long-range cross-linking can increase the pore size of the gel. However, during the drying process, the composite films cross-linked by polygenipin with higher degree of polymerization shrank to smaller size to create more compact structure, resulting in the improvement of water resistance properties, thermal stability, tensile strength, and darker color for the composite films. It is interesting that the composite films can partly swell to the original gel structure when in contact with water and saturated water vapor. All the composite films have excellent barrier properties against UV light. However, the compatibility of gelatin and polygenipin is reduced when the degree of polymerization of polygenipin increases to a certain extent, which will result in the formation of phase separation structure. The obtained composite films are ideal candidates for food and pharmaceutical packaging materials. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 104A: 2712-2722, 2016.

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“…The bands $ 3440, $ 2930, 1636-1661, and 1549-1558 cm À1 are denoted as A, B, I, and II amide bands, respectively. 36,37 Generally, the amide A and B bands are mainly associated with the stretching vibrations of NAH groups. The amide I bands is originated from C¼ ¼O stretching vibrations coupled to NAH bending vibration.…”

Section: Tem Measurement Of Spinning Solutionsmentioning

confidence: 99%

“…to CAN stretching vibrations. 36,37 Figure 4 shows that the positions of B, I, and II amide bands in gelatin-PEG-MMT nanocomposite fibers are nearly unchanged while the amide A shifts to low-frequency shoulder in comparison with G0. MMT is commonly used in nanocomposites owing to the structure known as the 2 : 1 phyllosilicates.…”

Section: Articlementioning

confidence: 99%

Effects of montmorillonite on the structure and properties of gelatin‐polyethylene glycol composite fibers

Guo

et al. 2012

J of Applied Polymer Sci

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To improve the thermal and mechanical properties of gelatin‐polyethylene glycol (PEG) composite fibers, montmorillonite (MMT) is incorporated into gelatin‐PEG composite fibers during gel‐spinning process. The effects of MMT on the structure and properties of gelatin‐PEG composite fibers are investigated. The viscosimetry analysis and transmission electron microscopy measurements show that MMT has a good dispersion in spinning solution at low loading, while serious aggregation is observed with excess amount of MMT adding. The data of X‐ray diffraction (XRD) show that MMT can be intercalated and exfoliated in gelatin‐PEG‐MMT nanocomposite fibers. Fourier transform infrared (FTIR) studies show the hydrogen bonding interactions between gelatin and MMT. The mechanical properties, differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) measurements indicate that the mechanical and thermal properties of nanocomposite fibers are improved as expected at low loading of MMT. However, excess amount of MMT decreases the mechanical and thermal properties of nanocomposite fibers due to poor dispersion and clay cluster induced gelatin chains aggregation. Moreover, it is found that the mechanical properties of gelatin‐PEG‐MMT nanocomposite fibers may be more sensitive to conformational change of gelatin molecules caused by the addition of MMT. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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Freezing/thawing effects on the exfoliation of montmorillonite in gelatin‐based bionanocomposite

Cited by 29 publications

References 43 publications

Development and characterization of dialdehyde xanthan gum crosslinked gelatin based edible films incorporated with amino-functionalized montmorillonite

Development and characterization of dialdehyde xanthan gum crosslinked gelatin based edible films incorporated with amino-functionalized montmorillonite

Short‐range and long‐range cross‐linking effects of polygenipin on gelatin‐based composite materials

Effects of montmorillonite on the structure and properties of gelatin‐polyethylene glycol composite fibers

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