In situ modification of bacterial cellulose network structure by adding interfering substances during fermentation

Huang, Huang-Chan; Chen, Li‐Chen; Lin, Shih‐Bin; Hsu, Chieh-Ping; Chen, Huihuang

doi:10.1016/j.biortech.2010.03.031

Cited by 122 publications

(62 citation statements)

References 34 publications

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“…It is shown in Figure 3(b) that the network of CBC was more closely knitted, which was also reported in Huang et al's study. 10 It is also obvious that the surface of CBC is coated by a layer of chitosan. The film of pristine BC shows a relatively smooth roughness of 321 nm ( Figure 3(a)).…”

Section: Morphology and Microstructurementioning

confidence: 99%

“…Earlier reports have also drawn similar conclusions. 24,40 The broader O-H peak implies that the hydrogenbonding strength in CBC was reduced, 10,41 since the hydrogen bonds between cellulose molecules were interfered with chitosan molecules. The weakening of these hydrogen bonds in CBC reflects the decrease of their crystalline regions, and this will be discussed later.…”

Section: Fourier Transform Infrared Spectroscopymentioning

confidence: 99%

“…According to equation (1), the inclusion of chitosan hydrochloride causes a decrease in the crystallinity index (CrI), as shown in Table 1, which is in agreement with the results of others' work. 10,24 Chitosan molecules were too large to enter the crystalline zone between subfibrils due to steric hindrance. They stuck discontinuously on the surface of microfibrils and interfered with the crystallization of BC by preventing the aggregation of microfibrils and the formation of ribbons during in situ biosynthesis.…”

Section: X-ray Diffractionmentioning

confidence: 99%

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Preparation and characterization of a novel bacterial cellulose/chitosan bio-hydrogel

Jia

Wang

Huo³

et al. 2017

Nanomaterials and Nanotechnology

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Composites of chitosan chloride and bacterial cellulose were successfully prepared by in situ method. Composites of bacterial cellulose/chitosan and pristine bacterial cellulose were investigated by means of scanning electron microscope, atomic force microscope, Fourier transform infrared spectroscopy, thermogravimetric analysis, X-ray diffraction, and bacteriostatic test. The crystallization of bacterial cellulose was interfered and weakened by the chitosan chloride included in the growth media, resulting in lower crystallinity index and thermal stability. And interaction between two polymers is verified by the thermal gravimetric analysis. The ultrafine nanofibril network structure of bacterial cellulose was retained by the composites, while the diameters were larger and the aperture inside were smaller than those of pristine bacterial cellulose, as shown through scanning electron microscope and atomic force microscope figures. The antimicrobial effects were enhanced by the increasing concentration of chitosan in composites. All the characteristics of the composites provide evidence for the miscibility of chitosan and cellulose. Their biocompatibility is proved through our published data. It is strongly indicated that bacterial cellulose-chitosan nanocomposites have great potential in tissue engineering or pharmaceutical applications in the near future.

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Section: Morphology and Microstructurementioning

confidence: 99%

Section: Fourier Transform Infrared Spectroscopymentioning

confidence: 99%

Section: X-ray Diffractionmentioning

confidence: 99%

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Preparation and characterization of a novel bacterial cellulose/chitosan bio-hydrogel

Jia

Wang

Huo³

et al. 2017

Nanomaterials and Nanotechnology

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“…Although BC has been modified with the use of these methods and improved the degradability in vivo, altering the nanonetwork structure and decreasing the crystallinity are inevitable; the unique mechanical and physical properties have also been compromised. Efforts to modify BC with the use of polymers, such as hydroxypropylmethyl cellulose [20], xyloglucan [21], chitosan [22], fibrin [23], and acrylic resin [24], as well as feeding strategies [25] have exhibited limited success and are very ineffective because the accessibility of the hydroxyl groups is decreased by multiple hydrogen bonds between the microfibers, which are tangled tightly. As shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

TEMPO-mediated oxidation of bacterial cellulose in a bromide-free system

et al. 2013

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A partially C6-carboxylated bacterial cellulose (BC) with a high carboxylate content was prepared in a bromide-free system by using 2,2,6,6-tetramethylpyperidine-1-oxyl (TEMPO) as a catalyst. ART-FTIR, X-ray diffraction, solid 13 C-NMR, TEM analysis, and reaction kinetics measurements were performed to investigate the oxidation reaction of BC. Results show that C6 carboxylate was formed selectively on the microfiber surface without disrupting its highly ordered nanocrystalline structure. Given the extremely low accessibility of hydroxyl groups in D-anhydroglucopyranose units, the reaction can be described by second-order kinetics with very low reaction rate constants. pH exhibited a significant influence on the oxidation of BC and a higher activity at C6 was observed in a neutral medium.

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“…[22,23]. Thus, in situ modification by adding exogenous substrate to the culture medium is a potential method to improve the physical properties of BC.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Bacterial Cellulose/Inorganic Gel of Bentonite Composite by In Situ Modification

Wang

Huang

et al. 2015

Indian J Microbiol

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To evaluate the possibility of Bacterial cellulose/Inorganic Gel of Bentonite (BC/IGB) composite production using in situ method, the BC/IGB composite was successfully produced by in situ modification of BC in both HS medium and corncob hydrolysate. The results showed that the BC/IGB composite obtained in HS medium (one classical medium for BC production) had a higher water holding capacity, but the water retention capacity of the BC/IGB composite obtained in corncob hydrolysate was better. The performance of BC/IGB composite depended on the environment of in situ modification. Using different media showed significant influence on the sugar utilization and BC yield. In addition, BC/IGB composite produced by in situ method was compared with that produced by ex situ method, and the results shows that water holding capacity of BC/IGB composite obtained through in situ method was better. XRD results showed the crystallinity of BC/IGB composite related little to its performance as water absorbent. Overall, in situ modification is appropriate for further production of BC composite and other clay materials.

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In situ modification of bacterial cellulose network structure by adding interfering substances during fermentation

Cited by 122 publications

References 34 publications

Preparation and characterization of a novel bacterial cellulose/chitosan bio-hydrogel

Preparation and characterization of a novel bacterial cellulose/chitosan bio-hydrogel

TEMPO-mediated oxidation of bacterial cellulose in a bromide-free system

Preparation of Bacterial Cellulose/Inorganic Gel of Bentonite Composite by In Situ Modification

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