Ultrasonication Improves the Structures and Physicochemical Properties of Cassava Starch Films Containing Acetic Acid

Wu, Fuqi; Zhou, Z.; Liang, Manling; Zhong, Lei; Xie, Fengwei

doi:10.1002/star.202000094

Cited by 10 publications

(7 citation statements)

References 47 publications

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“…In contrast, the AFM image of the films processed with ultrasonication (Figure 3b,d) shows that the surfaces are relatively smooth, compact, and homogeneous, which indicated that TP was well-distributed in the PVA-HC matrix, and that no critical agglomeration of TP was visible. A similar result was reported by Wu and coauthors, who observed that the untreated film surface was rough, while the surfaces of the films processed with ultrasonication were smooth and cohesive [41]. In this study, due to the disintegration of the TP agglomeration under intense ultrasonics in the film-forming solution, the film-forming components could be completely solubilized and hydrated, resulting in more homogeneous PVA-HC/TP film structure [42].…”

Section: Microstructure Analysissupporting

confidence: 88%

Active Biodegradable Polyvinyl Alcohol–Hemicellulose/Tea Polyphenol Films with Excellent Moisture Resistance Prepared via Ultrasound Assistance for Food Packaging

Guo

Wang

et al. 2021

Coatings

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Poor water-vapor barriers and mechanical properties are common problems of biobased films. To maintain food quality, the barrier and its strength performance need to be improved. Tea polyphenols (TP) are a natural active substance, and their benzene ring structure provides a barrier for them as a film material. Films that incorporate TP also have enriched functionalities, e.g., as antioxidants. Here, active poly (vinyl alcohol) (PVA)-hemicellulose (HC)/TP films with good moisture resistance and antioxidant capacity were prepared via ultrasound assistance. The effects of TP incorporation and ultrasonication on the physical, antioxidant, and micromorphological properties of the films were investigated. Results showed that the addition of TP improved the thermal stability and water-vapor permeability (WVP) of the composite films. When a PVA-HC/TP composite film with a PVA-HC to TP mass ratio of 100:10 was treated with ultrasonication for 45 min, tensile strength was 25.61 Mpa, which was increased by 54% from the film without any treatment, and water-vapor permeability (WVP) value declined from 49% to 4.29 × 10−12 g·cm/cm2·s·Pa. More importantly, the films’ DPPH scavenging activity increased to the maximal levels of 85.45%. In short, these observations create a feasible strategy for preparing high-performance biodegradable active-packaging films.

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Section: Microstructure Analysissupporting

confidence: 88%

Active Biodegradable Polyvinyl Alcohol–Hemicellulose/Tea Polyphenol Films with Excellent Moisture Resistance Prepared via Ultrasound Assistance for Food Packaging

Guo

Wang

et al. 2021

Coatings

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“…It was found that high ultrasonic energy may degrade the starch chain and weaken the starch chain interaction, resulting in an increasing in the brittleness of the material. [ 27 ] Insoluble particles were elastic structures that made the starch film mechanically stable. [ 22 ] It was adverse to the mechanical properties of the film when high ultrasonic power and long duration time caused all or most of the destruction of insoluble particles.…”

Section: Resultsmentioning

confidence: 99%

Properties of Potato Flour Films as Affected by Ultrasonic Treatment

Yao

et al. 2023

Starch Stärke

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The properties of potato flour film‐forming dispersions treated with ultrasound and their resultant films are studied. The microscopic images show that ultrasonic treatment destroys the particles and improves the uniformity of film‐forming dispersions. The resultant potato flour film with ultrasonic treatment has a smoother surface and better transparency. As the ultrasonic power and treatment time increase, elongation at break reduces from 18.85% to 12.87%, while tensile strength increases at first and then decreases. Ultrasound decreases the water vapor transmission rate from 13.68 × 10−11 to 4.92 × 10−11 g−1 s−1 Pa−1 and increases the hydrophobicity of the films. Films with 15 min treatment show a lower water solubility index, while ultrasonic treatment for 45 min increases the solubility of films. The moisture content of treated films is higher than that of the untreated sample. Results show that ultrasonic treatment improves the properties of potato flour films.

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“…The band at 1149 cm -1 is due to C-O-C asymmetric stretch vibration. Further, the presence of absorption bands at around 1020 and 848 cm -1 in the two spectra indicated that both films possess C-O and C-O-C functional groups, respectively (Wua et al, 2021). FTIR spectra of C.St and SVG/C.St films are almost identical and show characteristic peaks corresponding to starch molecules (Figure 1).…”

Section: Ftir Analysismentioning

confidence: 93%

Development of antibacterial polymer composite films from cassava starch and silver vein graphite composite

et al. 2022

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Nowadays starch based natural polymers have been received tremendous attention owing to their non-toxicity, biodegradability, and biocompatibility. However, the applications of starch-based films are restricted due to water sensitivity and bacterial contaminations. To overcome these issues, a polymer composite film was produced by solution casting using cassava starch and silver vein graphite composite. The incorporation of silver vein graphite composite into cassava starch showed a reduction in water absorption capacity of the film. Polymer composite film from cassava starch and SVG (SVG/C.St film) showed excellent antibacterial activity against Staphylococcus aureus (diameter of the inhibition zone, ±22 mm; positive control, ±24 mm) and moderate activity against Escherichia coli (diameter of the inhibition zone, ±8 mm; positive control, ±23 mm). Inhibition zones were not observed for any of those bacteria species when C.St films were used. Therefore, SVG/C.St film could be a promising material for many antibacterial applications.

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Ultrasonication Improves the Structures and Physicochemical Properties of Cassava Starch Films Containing Acetic Acid

Abstract: Please refer to published version for the most recent bibliographic citation information. If a published version is known of, the repository item page linked to above, will contain details on accessing it.

Cited by 10 publications

References 47 publications

Active Biodegradable Polyvinyl Alcohol–Hemicellulose/Tea Polyphenol Films with Excellent Moisture Resistance Prepared via Ultrasound Assistance for Food Packaging

Active Biodegradable Polyvinyl Alcohol–Hemicellulose/Tea Polyphenol Films with Excellent Moisture Resistance Prepared via Ultrasound Assistance for Food Packaging

Properties of Potato Flour Films as Affected by Ultrasonic Treatment

Development of antibacterial polymer composite films from cassava starch and silver vein graphite composite

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