Hexamethyldisiloxane cold plasma treatment and amylose content determine the structural, barrier and mechanical properties of starch-based films

Sifuentes‐Nieves, Israel; Hernández‐Hernández, Ernesto; Neira-Velázquez, Guadalupe; Morales-Sánchez, E.; Méndez‐Montealvo, Guadalupe; Velázquez, Gonzalo

doi:10.1016/j.ijbiomac.2018.11.211

Cited by 39 publications

(18 citation statements)

References 31 publications

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“…In accordance with the tensile strength, an increase in the Young's modulus of the hydrogels from 590.08 ± 29.5 MPa for HG@UT to 938.03 ± 46.9, 797.31 ± 39.9 and 1083.61 ± 54.18 MPa for HG@ N 2 / HMDSO, HG@ He/ HMDSO and HG@ Ar/ HMDSO respectively was also marked. This improvement in the tensile strength of the plasma treated hydrogels could be ascribed to the formation of thin silicone‐like coating on the hydrogel surfaces resulting from HMDSO plasma thereby leading to enhanced interfacial interaction and efficient load transfer . Additionally, the elongation at break (%) was witnessed to decrease from 4.21 ± 0.21% for HG@UT to 3.51 ± 0.17, 2.24 ± 0.11 and 3.20 ± 0.16% for HG@ N 2 / HMDSO, HG@ He/ HMDSO and HG@ Ar/ HMDSO respectively.…”

Section: Resultsmentioning

confidence: 95%

Controlled Release of 5‐Fluorouracil from Alginate Hydrogels by Cold HMDSO−Plasma Surface Engineering

et al. 2020

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For decades, 5‐fluorouracil (5FU) has been the only chemotherapeutic agent to demonstrate a strong activity against colorectal cancer. However intravenous administration of 5FU mandates the development of an oral controlled delivery system for improved patient compliances. With this rationale, hydrogels comprising polyvinyl alcohol and sodium alginate were crafted and subjected to cold atmospheric plasma treatment by coating with hexamethyldisiloxane (HMDSO) using three different carrier gases viz Ar, He and N2. Surface hydrophobicity ensuing from HMDSO plasma was evident from contact angle goniometry. FT‐IR analyses were affirmative of the effectual deposition of Si−O−Si and Si−CH3 groups on the hydrogel surfaces. Moreover, plasma treatment rendered the hydrogels stiffer and tougher. The plasma‐modified hydrogels displayed lower water uptake capacity in comparison to the pristine one. Drug release was significantly prolonged from the plasma‐treated hydrogels that conformed to the oral delivery of 5FU to colon. Preliminary kinetics assay revealed drug release was predominantly governed by polymer chain relaxation process post‐plasma modification. The Ar/HMDSO‐plasma modified hydrogel was found to be best of the lot for achieving an oral controlled release for 5FU.

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Section: Resultsmentioning

confidence: 95%

Controlled Release of 5‐Fluorouracil from Alginate Hydrogels by Cold HMDSO−Plasma Surface Engineering

et al. 2020

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“…A shift in the absorption bands at about 1648 and 1580 cm −1 (δ (O-H)) indicated an increase in hydrogen bonding and these phenomena could be attributed to surface oxygenation [58,82,99]. Further, Sifuentes-Nieves, Hernández-Hernández [101] and Sifuentes-Nieves, Mendez-Montealvo [85] studied the impact of cold plasma on starch films with low (30%) to high (50-70%) amylose content and reported that the application of different types of plasma (such as Hexamethyldisiloxane cold plasma, DBD, and radiofrequency plasma) altered the short-range crystalline structure of starch. This was indicated by a band ratio 1047/1022, where a peak at 1047 cm −1 denoted an ordered or crystalline structure and at 1022 cm −1 represented the amorphous region of starch [102,103].…”

Section: Molecular Properties Of the Film Fourier Transform Infrared (Ftir) Studymentioning

confidence: 90%

“…As shown in Figure 5II, after the plasma treatment the intensity at 1022 cm −1 decreased and 1047/1022 increased for all of the films. This indicates that the etching phenomena allowed the plasma reactive species to penetrate and reorder the amylopectin chains, thereby creating a highly ordered network in the starch film matrix [85,101]. A study by Sifuentes-Nieves, Hernández-Hernández [101] further reported that the peak at 3300 cm −1 corresponding to the O-H group disappeared in all the plasmatreated films and this was attributed to the impact of plasma reactive species altering the water retention capability of the starch film by the formation of a coating on the film surface [101].…”

Section: Molecular Properties Of the Film Fourier Transform Infrared (Ftir) Studymentioning

confidence: 99%

“…This indicates that the etching phenomena allowed the plasma reactive species to penetrate and reorder the amylopectin chains, thereby creating a highly ordered network in the starch film matrix [85,101]. A study by Sifuentes-Nieves, Hernández-Hernández [101] further reported that the peak at 3300 cm −1 corresponding to the O-H group disappeared in all the plasmatreated films and this was attributed to the impact of plasma reactive species altering the water retention capability of the starch film by the formation of a coating on the film surface [101]. Similarly, Goiana, de Brito [58] also reported that DBD plasma treatment of corn starch for 20 min demonstrated a reduction in the intensity of the peak in the range of 3500-3000 cm −1 at approximately 3295 cm −1 , implying the possible dehydration of film during the plasma treatment and thereby reduced hydrophilicity [58].…”

Section: Molecular Properties Of the Film Fourier Transform Infrared (Ftir) Studymentioning

confidence: 99%

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Effect of Cold Plasma Treatment on the Packaging Properties of Biopolymer-Based Films: A Review

et al. 2022

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Biopolymers, like polysaccharides and proteins, are sustainable and green materials with excellent film-forming potential. Bio-based films have gained a lot of attention and are believed to be an alternative to plastics in next-generation food packaging. Compared to conventional plastics, biopolymers inherently have certain limitations like hydrophilicity, poor thermo-mechanical, and barrier properties. Therefore, the modification of biopolymers or their films provide an opportunity to develop packaging materials with desired characteristics. Among different modification approaches, the application of cold plasma has been a very efficient technology to enhance the functionality and interfacial characteristics of biopolymers. Cold plasma is biocompatible, shows uniformity in treatment, and is suitable for heat-sensitive components. This review provides information on different plasma generating equipment used for the modification of films and critically analyses the impact of cold plasma on packaging properties of films prepared from protein, polysaccharides, and their combinations. Most studies to date have shown that plasma treatment effectively enhances surface characteristics, mechanical, and thermal properties, while its impact on the improvement of barrier properties is limited. Plasma treatment increases surface roughness that enables surface adhesion, ink printability, and reduces the contact angle. Plasma-treated films loaded with antimicrobial compounds demonstrate strong antimicrobial efficacy, mainly due to the increase in their diffusion rate and the non-thermal nature of cold plasma that protects the functionality of bioactive compounds. This review also elaborates on the existing challenges and future needs. Overall, it can be concluded that the application of cold plasma is an effective strategy to modify the inherent limitations of biopolymer-based packaging materials for food packaging applications.

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“…Probably the partially-gelatinized starch granules were bound to the structure formed by the solubilized gelatinized starch fraction. [8,31,32] The incorporation of acidic agents, such as lactic acid, has been observed to help obtain materials with a compact appearance, as well as a reduction in the size and content of non-gelatinized starch granules. [30] In small-size granules, the contact area of the polymeric material interacting with the water molecules increases, promoting a better gelatinization of the starch.…”

Section: Morphology Of Starch Granules and Biodegradable Starch Filmsmentioning

confidence: 99%

Characterization of Functional Properties of Biodegradable Films Based on Starches from Different Botanical Sources

et al. 2020

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Starch is the main biopolymer used to develop biodegradable films and coatings, mainly due to its availability in nature and low cost. Therefore, it is important to determine the properties of starch-based packaging materials, since the characteristics of each material may differ according to the botanical source. In this study, the functional properties of biodegradable films made from starch isolated from four botanical sources, corn, sorghum, potato, and achira are evaluated. The mechanical, water vapor barrier, morphological, thermal, and hydration properties are studied. Obtained films have a homogeneous appearance with no pores or cracks. The potato and achira films present some non-gelatinized granules on their surface, however, they are the ones that present the highest mechanical properties, where the non-gelatinized granules function as a reinforcing material for the polymer matrix. The red sorghum starch films present the best barrier for water vapor. The source of starch shows a significant effect on the tensile strength (TS) and percentage of elongation at breaking (%E). The solubility, swelling index, and water vapor adsorption capacity change significantly when comparing the four botanical sources, mainly because of the differences in the morphology of the resulting materials, amylose content and the size of the starch granule.

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Hexamethyldisiloxane cold plasma treatment and amylose content determine the structural, barrier and mechanical properties of starch-based films

Cited by 39 publications

References 31 publications

Controlled Release of 5‐Fluorouracil from Alginate Hydrogels by Cold HMDSO−Plasma Surface Engineering

Controlled Release of 5‐Fluorouracil from Alginate Hydrogels by Cold HMDSO−Plasma Surface Engineering

Effect of Cold Plasma Treatment on the Packaging Properties of Biopolymer-Based Films: A Review

Characterization of Functional Properties of Biodegradable Films Based on Starches from Different Botanical Sources

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