Pervaporation of binary water–ethanol mixtures through bacterial cellulose membrane

Dubey, Vinita; Saxena, Chhaya; Singh, Lokendra; Ramana, Karna Venkata; Chauhan, Rajinder Singh

doi:10.1016/s1383-5866(01)00210-6

Cited by 57 publications

(31 citation statements)

References 11 publications

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“…Most biosynthesized cellulose originates as a white gelatinous pellicle, which is called by Brown (1886) as ''Microbial Cellulose''. This kind of cellulose shows a high degree of crystallinity and superior mechanical properties in comparison with the other forms of cellulose (Budhionoa et al 1999;Tsuchida and Yoshinaga 1997;Klemm et al 2001;Dubey et al 2002;Maria et al 2009;Kurosumi et al 2009). It forms on the surface of a liquid medium at 30-40°C, in a static or dynamic culture containing a suitable microbe like Acetobacter Xylinum.…”

Section: Introductionmentioning

confidence: 99%

“…It forms on the surface of a liquid medium at 30-40°C, in a static or dynamic culture containing a suitable microbe like Acetobacter Xylinum. This microbe is a rod-shaped aerobic gram negative bacterium that occurs as a contaminant in vinegar production (Goelzer et al 2009;Dubey et al 2002;George et al 2005;Pandey et al 2005). It feeds and turns the glucose and other suitable organic components into cellulose (Kurosumi et al 2009;Keshk and Sameshima 2005;Keshk 2006).…”

Section: Introductionmentioning

confidence: 99%

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The effects of cotton gauze coating with microbial cellulose

et al. 2009

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Microbial cellulose is a pure form of cellulose with widespread applications. It is very applicable for medical usage specially wound dressings due to its high liquid absorbency and hygienic nature. In this study, microbial cellulose formed/ coated on cotton gauze samples during its biosynthesis in a static medium (Hestrin & Scharm) for 6 days by Acetobacter Xylinium. Some essential factors of treated gauze samples, like water absorbency, drying time (water holding time), and amount of vertical wicking were determined and compared with untreated samples. Results showed that cotton gauze coating with microbial cellulose increases water absorbency and wicking ability over 30%, and reduces drying time about 33%. It can be concluded that covering of cotton gauze with microbial cellulose can promote some important characteristics of it specially for wound dressings.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The effects of cotton gauze coating with microbial cellulose

et al. 2009

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“…However, because of its poor dissolution properties and processing difficulties, BC's application as water adsorbent for water conservation is still limited [9,[11][12][13][14][15][16][17]. Usually, BC modification could be done with some physical or chemical methods to enhance its performance [18][19][20][21].…”

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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“…Otra característica es su alto grado de cristalinidad (mayor a 60 %); estos cristales están compuestos de celulosa tipo I α y I β ; la relación entre las dos formas cristalinas depende del microorganismo y de las condiciones de cultivo (fuente de carbono, suplementos, temperatura) [7]. Una vez purificada, la celulosa bacteriana es no tóxica, no alergénica, biocompatible y biodegradable [11].…”

Section: |unclassified

“…Las membranas también se han utilizado para separación de polioles [41], clarificación de jugo de frutas [124], pervaporación de mezclas etanol-agua [11], [125], [126], pervaporación de componentes aromáticos de frutas [127], diálisis [128], [129], y permeación de gases [27], [130], [131]. En todos los casos las membranas han presentado selectividad para los componentes estudiados; sin embargo, uno de los principales inconvenientes es que para la mayor parte de los procesos de separación estudiados, el flux de permeado es bastante bajo.…”

Section: Aplicaciones De La Celulosa Bacterianaunclassified

Técnicas de fermentación y aplicaciones de la celulosa bacteriana: una revisión

2012

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ResumenLa celulosa bacteriana es un polímero obtenido por fermentación con microrganismos de los géneros Acetobacter, Rhizobium, Agrobacterium y Sarcina, de las cuales la especie más eficiente es la Acetobacter Xylinum. Este polímero presenta la misma estructura química de la celulosa de origen vegetal, pero difiere en su conformación y propiedades fisicoquímicas, lo que lo hace atractivo para diversas aplicaciones, especialmente en las áreas de alimentos, procesos de separación, catálisis y en medicina, gracias a su biocompatibilidad. Sin embargo, el principal problema es la producción a gran escala limitada por los bajos rendimientos, lo que genera la necesidad de desarrollar alternativas que permitan disminuir o eliminar las causas de esta limitación. En este artículo 1 Ingeniera Química Dr.Ing.

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Pervaporation of binary water–ethanol mixtures through bacterial cellulose membrane

Cited by 57 publications

References 11 publications

The effects of cotton gauze coating with microbial cellulose

The effects of cotton gauze coating with microbial cellulose

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

Técnicas de fermentación y aplicaciones de la celulosa bacteriana: una revisión

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