Effects of natural wax types on the physicochemical properties of starch/gelatin edible films fabricated by extrusion blowing

Cheng, Yue; Zhai, Xiaosong; Wu, Yulin; Li, Cheng; Zhang, Rui; Sun, Chanchan; Wang, Wentao; Hou, Hanxue

doi:10.1016/j.foodchem.2022.134081

Cited by 55 publications

(33 citation statements)

References 63 publications

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“…The chemical bonds in G-THA/NAS film are shown in Figure S5. In the XRD pattern (Figure b), the G film presented the characteristic of amorphous structure with a wide diffusion peak at 2θ = 20.6° . New crystal peak was observed at the pattern of G-THA film 2θ = 31.9°, which is the typical symbol of n-HA crystal (PDF#74-0565) .…”

Section: Resultsmentioning

confidence: 95%

Highly Hydrophobic Gelatin Nanocomposite Film Assisted by Nano-ZnO/(3-Aminopropyl) Triethoxysilane/Stearic Acid Coating for Liquid Food Packaging

Bu,

Wang,

Zhang

et al. 2023

ACS Appl. Mater. Interfaces

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Biodegradable gelatin (G) food packaging films are in increasing demand as the substitution of petroleum-based preservative materials. However, G packaging films universally suffer from weak hydrophobicity in practical applications. Constructing a hydrophobic micro/nanocoating with low surface energy is an effective countermeasure. However, the poor compatibility with the hydrophilic G substrate often leads to the weak interfacial adhesion and poor durability of the hydrophobic coating. To overcome this obstacle, we used (3-aminopropyl) triethoxysilane (APS) as an interfacial bridging agent to prepare a highly hydrophobic, versatile G nanocomposite film. Specifically, tannic acid (TA)-modified nanohydroxyapatite (n-HA) particles (THA) were introduced in G matrix (G-THA) to improve the mechanical properties. Micro/nanostructure with low surface energy composed of nanozinc oxide (Nano-ZnO)/APS/stearic acid (SA) (NAS) was constructed on the surface of G-THA film (G-THA/NAS) through one-step spray treatment. Consequently, as-prepared G-THA/NAS film presented excellent mechanics (tensile strength: 7.6 MPa, elongation at break: 292.7%), water resistance ability (water contact angle: 150.4°), high UV-shielding (0% transmittance at 200 nm), degradability (100% degradation rate after buried in the natural soil for 15 days), antioxidant (78.8% of 2,2-diphenyl-1-picrylhydrazyl radical scavenging activity), and antimicrobial (inhibition zone against Escherichia coli: 15.0 mm and Staphylococcus aureus: 16.5 mm) properties. It should be emphasized that the bridging function of APS significantly improves the interfacial adhesion ability of the NAS coating with more than 95% remaining area after the cross-cut adhesion test. Meanwhile, the G-THA/NAS film could maintain stable and long-lasting hydrophobic surfaces against UV radiation, high temperature, and abrasion. Based on these multifunctional properties, the G-THA/NAS film was successfully applied as a liquid packaging material. To sum up, we provide a feasible and effective method to prepare high-performance green packaging films.

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Section: Resultsmentioning

confidence: 95%

Highly Hydrophobic Gelatin Nanocomposite Film Assisted by Nano-ZnO/(3-Aminopropyl) Triethoxysilane/Stearic Acid Coating for Liquid Food Packaging

Bu,

Wang,

Zhang

et al. 2023

ACS Appl. Mater. Interfaces

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“…Waxes contain special resins, higher fatty acids, wax esters of higher hydroxy alcohols, as well as long-chain alkanes of the strongest hydrophobicity [34]. Cheng et al [35] showed that depending on waxes composition, they increase the water resistance and film surface hydrophobicity to a different extent. The Authors stated that the addition of beeswax significantly improved the surface hydrophobicity and WCA of starch gell films due to the wax crystal particles formed on the film surface.…”

Section: Surface Characterizationmentioning

confidence: 99%

Characterization of the Structural and Physical Properties of the Thermoplastic Starch Film with Kaolinite and Beeswax Addition

Beer–Lech¹,

Skic²,

Skic³

et al. 2022

Adv. Sci. Technol. Res. J.

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The aim of the study was to investigate the influence of kaolinite (KA) and beeswax (BW) addition on the structural and physical properties of thermoplastic starch (TPS) films. The casting method was applied and glycerol was used as a plasticizer. Microstructure analyzes were made by a stereoscopic and a scanning electron microscope. Tensile tests were carried out under static load conditions at three different deformation velocities of V = 0.0001, 0.001, and 0.01 m/s. The studies of surfaces characteristic were performed using water contact angle and water vapor isotherm measurements. The most homogeneous structure of the surface with higher mean values of failure stress and elasticity modulus was observed for thermoplastic starch films with kaolinite addition. The significant reduction in dynamics changes of water contact angle (10 %) of BW films in the time 0-20 s as well as tensile strength decrease was noted (compared to pure TPS films). The research results suggest the validity of using BW and KA to improve the barrier and mechanical properties of TPS films. Further research should focus on to improve the starch-beeswax-kaolinite combination and increase the homogeneity of the structure of films in order to upswing their simultaneous impact on barrier and mechanical properties.

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“…As an outer layer, it isolates the food from the action of light and oxygen. Gelatin can be used to obtain edible films [ 26 , 27 , 28 , 29 ] for meat products [ 30 , 31 ] or post-harvest fruit and vegetable [ 32 , 33 , 34 , 35 ] preservation. Mechanical properties such as fragility, rigidity, and brittleness are common in gelatin films, which often require the addition of other compounds to improve their performance such as chitosan [ 36 , 37 , 38 , 39 ], sodium alginate [ 40 ], grapefruit-seed extract and TiO 2 [ 41 ], starch [ 42 ], and plant extracts [ 43 , 44 ].…”

Section: Introductionmentioning

confidence: 99%

Characterization of a Graphene Oxide-Reinforced Whey Hydrogel as an Eco-Friendly Absorbent for Food Packaging

Lopes

Moldovan

Fechete

et al. 2023

Gels

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This study presents a structural analysis of a whey and gelatin-based hydrogel reinforced with graphene oxide (GO) by ultraviolet and visible (UV-VIS) spectroscopy, Fourier transform infrared spectroscopy (FT-IR), and X-ray diffraction (XRD). The results revealed barrier properties in the UV range for the reference sample (containing no graphene oxide) and the samples with minimal GO content of 0.66×10−3% and 3.33×10−3%, respectively, in the UV-VIS and near-IR range; for the samples with higher GO content, this was 6.67×10−3% and 33.33×10−3% as an effect of the introduction of GO into the hydrogel composite. The changes in the position of diffraction angles 2θ from the X-ray diffraction patterns of GO-reinforced hydrogels indicated a decrease in the distances between the turns of the protein helix structure due to the GO cross-linking effect. Transmission electron spectroscopy (TEM) was used for GO, whilst scanning electron microscopy (SEM) was used for the composite characterization. A novel technique for investigating the swelling rate was presented by performing electrical conductivity measurements, the results of which led to the identification of a potential hydrogel with sensor properties.

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Effects of natural wax types on the physicochemical properties of starch/gelatin edible films fabricated by extrusion blowing

Cited by 55 publications

References 63 publications

Highly Hydrophobic Gelatin Nanocomposite Film Assisted by Nano-ZnO/(3-Aminopropyl) Triethoxysilane/Stearic Acid Coating for Liquid Food Packaging

Highly Hydrophobic Gelatin Nanocomposite Film Assisted by Nano-ZnO/(3-Aminopropyl) Triethoxysilane/Stearic Acid Coating for Liquid Food Packaging

Characterization of the Structural and Physical Properties of the Thermoplastic Starch Film with Kaolinite and Beeswax Addition

Characterization of a Graphene Oxide-Reinforced Whey Hydrogel as an Eco-Friendly Absorbent for Food Packaging

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