Glycerol and triethyl citrate plasticizer effects on molecular, thermal, mechanical, and barrier properties of cellulose acetate films

Teixeira, Samiris Côcco; Silva, Rafael Resende Assis; Oliveira, Taíla Veloso de; Stringheta, Paulo César; Pinto, Marcos Roberto Moacir Ribeiro; Soares, Nilda de Fátima Ferreira

doi:10.1016/j.fbio.2021.101202

Cited by 53 publications

(18 citation statements)

References 42 publications

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“…Notably, it is possible to observe that both the agar-agar (Figure 5) and cellulose acetate films (Figure 4) have agglomerates that may be associated with not fully dispersed compounds, stemming from the production method. On the contrary, the presence of particles that are attributed to anthocyanins in CA films (Figure 4b) which have a semi-rounded shape without the formation of agglomerates, is evident and occurs by the low interaction between the components of anthocyanins, mostly hydrophilic, and CA having high hydrophobicity [30]. These particles are not observed in Figure 4a, confirming the presence of anthocyanins in the CA colorimetric indicator, in agreement with the FT-IR and TGA analysis.…”

Section: Scanning Electron Microscopy (Sem)supporting

confidence: 80%

Anthocyanins of Açaí Applied as a Colorimetric Indicator of Milk Spoilage: A Study Using Agar-Agar and Cellulose Acetate as Solid Support to Be Applied in Packaging

et al. 2022

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Food that is still fit for consumption is wasted in the domestic environment every day, so food packaging technologies are being developed that will monitor the quality of the products in real time. Highly perishable milk is currently one of the products that suffers most from this waste, due to its short shelf life. Active use-by date (AUBD) indicators have been shown to discriminate between fresh and spoiled milk. Colorimetric indicators undergo characteristic changes in their chemical structure, causing abrupt color changes. Among the polymeric materials studied that may function as solid support are cellulose acetate (CA) and agar-agar (AA). The AA colorimetric indicator proved to be more suitable as a solid support due to its ability to maintain the color change properties of the anthocyanin and its high colorimetric performance. The technique was shown to be capable of indicating, in real time, changes in milk quality.

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Section: Scanning Electron Microscopy (Sem)supporting

confidence: 80%

Anthocyanins of Açaí Applied as a Colorimetric Indicator of Milk Spoilage: A Study Using Agar-Agar and Cellulose Acetate as Solid Support to Be Applied in Packaging

et al. 2022

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“…The glycerol-containing biofilms present lower transmittance (T7-T10) than correspondent biofilms without glycerol (T2-T5), specially at 395 nm. According to Teixeira et al, 44 a larger opacity of glycerol-containing biofilms can be attributed to the difficulty of the plasticizing agent to disperse in the polymer matrix.…”

Section: Cellulose-based Biofilms Doped With Agnpsmentioning

confidence: 99%

Green Synthesis of Cellulose-Based Biofilms Doped with AgNPs with Antibacterial Activity

Pereira¹,

Silva²,

Marques³

et al. 2023

J. Braz. Chem. Soc.

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In this work, cellulose-based composite biofilms doped with silver nanoparticles (AgNPs) have been produced by eco-friendly process. The AgNPs were synthesized from Ilex paraguariensis with an average size of 45 nm, a characteristic plasmon band at 450 nm and zeta potential of -23 mV. The biofilm has been synthesized by casting method, using different volumes of AgNPs suspension with glycerol plasticizing agent (T6-T10) or not (T1-T5). The AgNPs were successfully incorporated into the biofilms that was confirmed by scanning electron microscopy. The mechanical and optical structural and the antimicrobial properties of the biofilms have been determined. In the presence of AgNPs, the mechanical properties, thermal stability and water vapor barrier of the biofilms have been not altered. However, the addition of glycerol decreased the tensile strength and the modulus of elasticity, in addition to increasing the elongation of the biofilms and the water vapor barrier. The biofilm T10 showed a transmittance of ca. 10%, with high potential to be used as a UV light blocker. Finally, the biofilms doped with AgNPs showed activity against the bacterium Pseudomonas fluorescens. Given the above, this work presented a new biofilm with activity against the bacterium Pseudomonus fluorescens obtained by eco-friendly process.

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“…When the ratio was fixed at 0 level, elongation length of both increased continuously and then decreased. According to plasticizer impacted elongation length due to glycerol to reduce the interactions among polymer chains, thus decreased film resistance and increased flexibility (Teixeira et al, 2021).…”

Section: The Effect Of Independent Variables On Mechanical Propertiesmentioning

confidence: 99%

Preparation of Rosemary Collagen Chitosan Blend Membrane Using Response Surface Methodology (RSM)

He¹,

Zhai²,

Zhang³

et al. 2021

American Journal of Biochemistry and Biotechnology

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The present research provided a formula for the optimization of rosemary/collagen/chitosan blend membrane. Rosemary Extract (RE) was used as additive and membrane was prepared using tensile strength, elongation at break and elongation length as the indexes. The results of single factor experiment showed that the addition ratio of collagen to chitosan, additive content, glycerol content and drying temperature all affected the mechanical properties and thickness of the blend membrane, among which the addition ratio of collagen to chitosan and glycerol content had a great influence. Box-Behnken Design (BBD) of Response Surface Methodology (RSM) was used to optimize the process and the parameters were obtained as follows: The ratio of collagen to chitosan (39:61, v/v), the addition of RE (0.6 mg/mL) and the glycerol content (30.2%). The mechanical properties and thickness of the optimized formula were verified, which proved the feasibility of the scheme and the broad application prospect of rosemary/collagen/chitosan blend membrane in meat packaging industry. The optimal data of tensile strength, elongation at break, elongation length and thickness were 2789.65 g, 49.92%, 117.55 and 0.143 mm, respectively. In the future, the research of blend membrane in food industry will more meet the diversified and high-performance market demand.

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Glycerol and triethyl citrate plasticizer effects on molecular, thermal, mechanical, and barrier properties of cellulose acetate films

Cited by 53 publications

References 42 publications

Anthocyanins of Açaí Applied as a Colorimetric Indicator of Milk Spoilage: A Study Using Agar-Agar and Cellulose Acetate as Solid Support to Be Applied in Packaging

Anthocyanins of Açaí Applied as a Colorimetric Indicator of Milk Spoilage: A Study Using Agar-Agar and Cellulose Acetate as Solid Support to Be Applied in Packaging

Green Synthesis of Cellulose-Based Biofilms Doped with AgNPs with Antibacterial Activity

Preparation of Rosemary Collagen Chitosan Blend Membrane Using Response Surface Methodology (RSM)

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