Physicochemical Mechanics of Bacterial Cellulose

Скворцова, З. Н.; Громовых, Т. И.; Grachev, Vladimir; Traskin, V. Yu.

doi:10.1134/s1061933x19040161

Cited by 28 publications

(10 citation statements)

References 77 publications

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“…Our results are in line with current results, which state that the content of BC in its initial state is no higher than 1% [ 22 , 26 , 44 ]. BC is a hydrogel-like membrane, and its fibrous and network-like structure contribute to its very high water content [ 24 ].…”

Section: Resultssupporting

confidence: 93%

Optimization of Moist and Oven-Dried Bacterial Cellulose Production for Functional Properties

et al. 2021

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Bacterial cellulose (BC) is a natural polymer with properties suitable for tissue engineering and possible applications in scaffold production. However, current procedures have limitations in obtaining BC pellicles with the desired structural, physical, and mechanical properties. Thus, this study analyzed the optimal culture conditions of BC membranes and two types of processing: draining and oven-drying. The aim was to obtain BC membranes with properties suitable for a wound dressing material. Two studies were carried out. In the preliminary study, the medium (100 mL) was inoculated with varying volumes (1, 2, 3, 4, and 5 mL) and incubated statically for different periods (3, 6, 9, 12, and 18 days), using a full factorial experimental design. Thickness, uniformity, weight, and yield were evaluated. In the optimization study, a Box–Behnken design was used. Two independent variables were used: inoculum volume (X1: 1, 3, and 5 mL) and fermentation period (X2: 6, 12, and 18 d) to determine the target response variables: thickness, swelling ratio, drug release, fiber diameter, tensile strength, and Young’s modulus for both dry and moist BC membranes. The mathematical modelling of the effect of the two independent variables was performed by response surface methodology (RSM). The obtained models were validated with new experimental values and confirmed for all tested properties, except Young’s modulus of oven-dried BC. Thus, the optimal properties in terms of a scaffold material of the moist BC were obtained with an inoculum volume of 5% (v/v) and 16 d of fermentation. While, for the oven-dried membranes, optimal properties were obtained with a 4% (v/v) and 14 d of fermentation.

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Section: Resultssupporting

confidence: 93%

Optimization of Moist and Oven-Dried Bacterial Cellulose Production for Functional Properties

et al. 2021

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“…Also, the moisture content is negatively correlated to the elongation at break (r = -0.454; p = 0.012). The results are consistent other authors reporting that the mechanical behavior of BC essentially depends on its moisture content (Skvortsova et al 2019).…”

Section: Fourier Transform Infrared Spectroscopy (Ftir)supporting

confidence: 93%

“…Our results are in line with current results which state that the content of BC in initial state being no higher than 1% (Castro et al 2012;Rangaswamy et al 2015;Skvortsova et al 2019). BC is a hydrogel-like membrane, and its brous and network-like structure contribute to its very high water content (Gea et al 2011).…”

Section: Film Weight and Yieldsupporting

confidence: 93%

“…The three-dimensional porous structure of BCm can facilitate the drug release activity because of the larger surface area that facilitates drug uptake and has faster release rates (Wei et al 2011). Skvortsova et al (2019) found that drying leads to distortions of the BC structure due to aggregation of cellulose brils. As a result, the porosity appears to decrease signi cantly.…”

Section: Drug Releasementioning

confidence: 99%

“…It seems that oven-drying makes the structure of BC more rigid and less porous (Alonso et al 2018;Fu et al 2013;Zhang et al 2011). The three-dimensional porous structure of BCm can facilitate the drug release activity because of the larger surface area that facilitates drug uptake and has faster release rates (Wei et al 2011). Skvortsova et al (2019 found that drying leads to distortions of the BC structure due to aggregation of cellulose brils.…”

Section: Drug Releasementioning

confidence: 99%

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Optimization of moist and oven-dried bacterial cellulose production for functional properties

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et al. 2021

Preprint

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Bacterial cellulose (BC) is a natural polymer with properties suitable for tissue engineering and possible applications in scaffold production. However, current procedures have limitations in obtaining BC pellicles with the desired structural, physical, and mechanical properties. Thus, this study analyzed the optimal culture conditions of BC membranes and 2 types of processing: draining and oven-drying. The aim was to obtain BC membranes with properties suitable for a wound dressing material. Two studies were carried out. In the preliminary study the medium (100 mL) was inoculated with varying volumes (1; 2; 3; 4; and 5 mL) and incubated statically for different periods (3; 6; 9; 12; and 18 days), using a full factorial experimental design. Thickness, uniformity, weight, and yield were evaluated. In the optimization study, a Box–Behnken design was used. Two independent variables were used: inoculum volume (X1: 1; 3; and 5 mL) and fermentation period (X2: 6; 12; and 18 d) to determine the target response variables: thickness, swelling ratio, drug release, fiber diameter, Tensile strength, and Young's Modulus for both dry and moist BC membranes. The mathematical modelling of the effect of the 2 independent variables was accomplished by response surface methodology (RSM). The obtained models were validated with new experimental values, and confirmed for all tested properties, except Young Modulus of oven-dried BC. Thus, the optimal properties in terms of a scaffold material of the moist BC were obtained with an inoculum volume of 5% (v/v) and 16 d of fermentation. While, for the oven-dried membranes a 4% (v/v) and 14 d of fermentation.

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Bacterial Cellulose‐Based Material from Coconut Water as Efficient Green Adsorbent for Heavy Metal Cations

et al. 2023

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Nata de coco produced via coconut water fermentation using Acetobacter xylinum was directly applied to remove metal cations in aqueous solutions without any further chemical modification. Bacterial cellulose, contributing just 0.8 wt % to nata de coco, were randomly distributed and interconnected, yielding a three‐dimensional framework with high crystallinity and porosity. Due to these characteristics and the abundant presence of electron‐rich hydroxyl groups, unmodified bacterial cellulose in nata de coco exhibited a strong affinity to metal cations in water. The adsorption efficiency of nata de coco can be significantly improved to ∼30 and ∼45 mg g−1 for Pb2+ and Fe3+, respectively, by decreasing its size by grinding to decrease its size. Notably, nata de coco can adsorb multiple cations and the uptakes were almost similar for a 100‐fold scaled‐up adsorption volume.

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Physicochemical Mechanics of Bacterial Cellulose

Cited by 28 publications

References 77 publications

Optimization of Moist and Oven-Dried Bacterial Cellulose Production for Functional Properties

Optimization of Moist and Oven-Dried Bacterial Cellulose Production for Functional Properties

Optimization of moist and oven-dried bacterial cellulose production for functional properties

Bacterial Cellulose‐Based Material from Coconut Water as Efficient Green Adsorbent for Heavy Metal Cations

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