The Structure–Property Correlations in Dry Gelatin Adhesive Films

Mosleh, Yasmine; Zeeuw, Willem de; Nijemesland, Marlies; Bijleveld, Johan; Duin, Paul van; Poulis, J. A.

doi:10.1002/adem.202000716

Cited by 41 publications

(20 citation statements)

References 26 publications

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“…Iron ions form a crosslink complex that bonds to macromolecules through multiple means, such as hydrophobic interactions and hydrogen and ionic bonding [ 68 ]. These findings are consistent with those of previous studies [ 67 , 69 ]. Neat cellulose acetate-based films exhibited a moderate water contact angle value (WCA = 92.7°) due to the hydrophobicity of cellulose acetate [ 70 , 71 ].…”

Section: Resultssupporting

confidence: 94%

Biopolymer-Based Films Reinforced with FexOy-Nanoparticles

et al. 2022

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Nowadays, natural polymer-based films are considered potentially environmentally friendly alternatives to conventional plastic films, due to many advantageous properties, including their easy processability, high flexibility, non-toxicity, low cost, high availability, and environmental safety. However, they are limited in their application by a number of shortcomings, including their high water solubility and vapor permeability as well as their poor opacity and low mechanical resistance. Thus, nanoparticles, such as green FexOy-NPs, can be used to overcome the drawbacks associated with these materials. Therefore, the aim of this study was to develop three different polymer-based films (gelatin-based, cellulose acetate-based and chitosan-based films) containing green synthesized FexOy-NPs (1.0% w/w of the initial polymer weight) as an additive to improve film properties. This was accomplished by preparing the different films using the casting method and examining their physicochemical, mechanical, microstructural, and functional characteristics. The results show that the incorporation of FexOy-NPs into the different films significantly enhanced their physicochemical, mechanical, and morphological properties as well as their antioxidant characteristics. Consequently, it was possible to produce suitable natural polymer-based films with potential applications across a wide range of industries, including functional packaging for food, antioxidants, and antimicrobial additives for pharmaceutical and biomedical materials as well as pesticides for agriculture.

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Section: Resultssupporting

confidence: 94%

Biopolymer-Based Films Reinforced with FexOy-Nanoparticles

et al. 2022

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“…The determined contact angle values with water and ethylene glycol were illustrated in Table 1 . The gelatin material (G sample) presents a relatively hydrophobic behavior, as is also reported in the literature [ 78 ]. This characteristic is due to the preferential orientation of the hydrophobic moieties at the gelatin–air interface during gelation; most of the hydrophilic groups (amino or carboxyl) form internal hydrogen bonds, whereas hydrophobic groups (aliphatic or aryl) arrange themselves on the surface of the film.…”

Section: Resultsmentioning

confidence: 64%

Composite Materials Based on Gelatin and Iron Oxide Nanoparticles for MRI Accuracy

Drobotă¹,

Vlad²,

Grădinaru³

et al. 2022

Materials

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The majority of recent studies have focused on obtaining MRI materials for internal use. However, this study focuses on a straightforward method for preparing gelatin-based materials with iron oxide nanoparticles (G–Fe2O3 and G–Fe3O4) for external use. The newly obtained materials must be precisely tuned to match the requirements and usage situation because they will be in close touch with human/animal skin. The biocompatible structures formed by gelatin, tannic acid, and iron oxide nanoparticles were investigated by using FTIR spectroscopy, SEM-EDAX analysis, and contact angle methods. The physico-chemical properties were obtained by using mechanical investigations, dynamic vapor sorption analysis, and bulk magnetic determination. The size and shape of iron oxide nanoparticles dictates the magnetic behavior of the gelatin-based samples. The magnetization curves revealed a typical S-shaped superparamagnetic behavior which is evidence of improved MRI image accuracy. In addition, the MTT assay was used to demonstrate the non-toxicity of the samples, and the antibacterial test confirmed satisfactory findings for all G-based materials.

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“…The transition temperature for the biogel from viscous liquid to viscoelastic gel was adjusted to make it suitable for direct on-skin usage, as the skin temperature for different points on the human body is normally about 37°C ( 23 , 24 ). The physical cross-link content in the biogel matrix has influence on its phase transition temperature, because the thermal-responsive phase transition is caused by the disaggregation and aggregation of the physical cross-links in the biogel matrix at high and low temperature ( 25 ). A higher cross-link density in the gel matrix would result in a higher phase transition temperature.…”

Section: Resultsmentioning

confidence: 99%

On-skin paintable biogel for long-term high-fidelity electroencephalogram recording

Wang

et al. 2022

Sci. Adv.

104

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Long-term high-fidelity electroencephalogram (EEG) recordings are critical for clinical and brain science applications. Conductive liquid-like or solid-like wet interface materials have been conventionally used as reliable interfaces for EEG recording. However, because of their simplex liquid or solid phase, electrodes with them as interfaces confront inadequate dynamic adaptability to hairy scalp, which makes it challenging to maintain stable and efficient contact of electrodes with scalp for long-term EEG recording. Here, we develop an on-skin paintable conductive biogel that shows temperature-controlled reversible fluid-gel transition to address the abovementioned limitation. This phase transition endows the biogel with unique on-skin paintability and in situ gelatinization, establishing conformal contact and dynamic compliance of electrodes with hairy scalp. The biogel is demonstrated as an efficient interface for long-term high-quality EEG recording over several days and for the high-performance capture and classification of evoked potentials. The paintable biogel offers a biocompatible and long-term reliable interface for EEG-based systems.

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The Structure–Property Correlations in Dry Gelatin Adhesive Films

Cited by 41 publications

References 26 publications

Biopolymer-Based Films Reinforced with FexOy-Nanoparticles

Biopolymer-Based Films Reinforced with FexOy-Nanoparticles

Composite Materials Based on Gelatin and Iron Oxide Nanoparticles for MRI Accuracy

On-skin paintable biogel for long-term high-fidelity electroencephalogram recording

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