Development of ultrasound treated polyvinyl alcohol/tea polyphenol composite films and their physicochemical properties

Liu, Yaowen; Wang, Shuyao; Lan, Weijie; Qin, Wen

doi:10.1016/j.ultsonch.2018.07.043

Cited by 83 publications

(62 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With the addition of both GA and QC at the two different amounts, Tg gradually increased to a mean value of 85 °C when 10% wt. of both active ingredients was incorporated, whereas a notable enhancement of Tm values during the second heating scan, due to reduced mobility of PVA chains, was also registered [15]. In addition, PVA/GA and PVA/QC films exhibited narrower endothermic peaks than PVA alone (data not shown).…”

Section: Thermal Analysismentioning

confidence: 92%

“…Both compounds are commonly used as additives in cosmetics and food to prevent the oxidative processes responsible for product deterioration [10,11]. Limiting the analysis to their use in poly(vinyl alcohol) (PVA) based films, the literature reports the incorporation of tannic acid [10], hydroxytyrosol and its derivatives [11][12][13], tea plant [14][15][16] and rosemary extracts, to produce antioxidant films potentially useful to increase the shelf life of food [17,18].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Gallic Acid and Quercetin as Intelligent and Active Ingredients in Poly(vinyl alcohol) Films for Food Packaging

et al. 2019

View full text Add to dashboard Cite

Gallic acid (GA) and quercetin (QC) were used as active ingredients in poly(vinyl alcohol) (PVA) film formulations obtained by solvent casting process. The effect of two different percentages (5 and 10 % wt.) on morphological behavior, thermal stability, optical, mechanical, and release properties of PVA were investigated, while migration with food stimulants and antioxidant properties were tested taking into account the final application as food packaging systems. The results showed how different dispersability in PVA water solutions gave different results in term of deformability (mean value of ε PVA/5GA = 280% and ε PVA/5QC = 255%, with 190% for neat PVA), comparable values for antioxidant activity at the high contents (Radical Scavenging Activity, RSA(%) PVA/10GA = 95 and RSA(%) PVA/10QC = 91) and different coloring attitude of the polymeric films. It was proved that GA, even if it represents the best antioxidant ingredient to be used with PVA and can be easily dispersed in water, it gives more rigid films in comparison to QC, that indeed was more efficient in tuning the deformability of the PVA films, due the presence of sole hydroxyl groups carrying agent. The deviation of the film coloring towards greenish tones for GA films and redness for QC films after 7 and within 21 days in the simulated conditions confirmed the possibility of using easy processable PVA films as active and intelligent films in food packaging.

show abstract

Section: Thermal Analysismentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Gallic Acid and Quercetin as Intelligent and Active Ingredients in Poly(vinyl alcohol) Films for Food Packaging

et al. 2019

View full text Add to dashboard Cite

show abstract

“…The cavitation effect of the sonication wave could destroy the hydrogen bonds formed between FG and carvacrol to free the intermolecular hydroxyl groups and increase their absorption peak intensities. In addition, the super-mixing effect enhancing the motion of molecules could accelerate the formation and fragmentation of hydrogen bonds [41].…”

Section: Fourier Transform Infrared Spectroscopy (Ftir) Spectramentioning

confidence: 99%

Effect of Sonication on the Properties of Flaxseed Gum Films Incorporated with Carvacrol

Fang

Qiu

Mei

et al. 2020

IJMS

View full text Add to dashboard Cite

Carvacrol is a natural compound known to be a highly effective antibacterial; however, it is a hydrophobic molecule, which is a limitation to its use within food packaging. Flaxseed gum (FG) films containing different contents of carvacrol (C) were produced by a film-casting method with sonication. The effects of sonication power and time on the properties of the FG-C films were investigated by measuring the film thickness, mechanical properties, contact angle, opacity, water vapor permeability (WVP), water sorption isotherm, Fourier transform infrared spectroscopy(FTIR), differential scanning calorimetry (DSC), antibacterial and antioxidant activities, and microstructure. The results showed that sonication power and time had significant effects on mechanical and barrier properties, film opacity, and degradability (p < 0.05). The tensile strength (TS) and elongation at break (EB) values exhibited an obvious improvement after sonication, and FG-0.5C-6030 had the lowest TS (33.40 MPa) and EB (4.46%) values. FG-C films formed a denser structure and the contact angle was improved as a result of sonication, which improved the integration of carvacrol into the FG matrix. In terms of microstructure, sonication resulted in a homogeneous and continuous crosssection of FG-C films, and regular surface and cross-sectional images were obtained through the highest acoustic intensity and longest time treatment. The FG films incorporated with carvacrol displayed antibacterial properties against Staphylococcus aureus, Vibrio parahaemolyticus, Shewanella putrefaciens, and Pseudomonas fluorescens, as well as increased antioxidant properties, and sonication was proven to enhance both of them.

show abstract

“…Solutions of 10% (w/v) PVA and 3% (w/v) CS were resolved in the same acetic acid solution volume separately (2%, v/v). To form a homogenous PVA/CS solution with the volumetric proportion of 1:1, the CS solution and PVA solution were mixed and stirred for 0.5 h. DMC (2, 4, 6, 8 g) solutions with different quantities were dropped into PVA/CS solution and energetically stirred for 24 h using a magnetic stirrer to ensure mixed homogeneity [25]. Glycerol (2 mL per 200 mL of film-forming solution) was used as a plasticizer.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Ultrasound Treated Polyvinyl Alcohol/Chitosan/DMC Antimicrobial Films

Wang

et al. 2019

Coatings

Self Cite

View full text Add to dashboard Cite

In this research, chitosan (CS) and poly (vinyl alcohol) (PVA) were adopted as a material, methacryloyloxyethyl trimethyl ammonium chloride (DMC) was added in various concentrations and was treated ultrasonically for the formation of films with the use of the polymer blending method. The influences exerted by the ultrasonication period on PVA/CS/DMC antimicrobial active materials underwent material characteristic tests. The consequences revealed that at the break of the compound films, ultrasonication raised the elongation and tensile strength on the whole. Ultrasonication further or also enhanced the light transmittance performance and composite films’ barrier property. Furthermore, the compound film with a DMC concentration of 2% had good antibacterial properties, the film’s inhibition rates against Staphylococcus aureus and Escherichia coli after ultrasonication were 79.23% ± 1.92% and 72.31% ± 1.35%, respectively.

show abstract

Development of ultrasound treated polyvinyl alcohol/tea polyphenol composite films and their physicochemical properties

Cited by 83 publications

References 46 publications

Gallic Acid and Quercetin as Intelligent and Active Ingredients in Poly(vinyl alcohol) Films for Food Packaging

Gallic Acid and Quercetin as Intelligent and Active Ingredients in Poly(vinyl alcohol) Films for Food Packaging

Effect of Sonication on the Properties of Flaxseed Gum Films Incorporated with Carvacrol

Preparation and Characterization of Ultrasound Treated Polyvinyl Alcohol/Chitosan/DMC Antimicrobial Films

Contact Info

Product

Resources

About