Topological characterization of a bacterial cellulose–acrylic acid polymeric matrix

Use of low-field NMR for the characterization of gels and biological tissues

“…M depends not only on the solid surface chemistry but also on temperature, hydrogenated fluid type, and magnetic field strength [29]. Typically, at 20 MHz, in the temperature range 25-37 °C, polymeric materials are characterized by M values ranging between 10 -7 -10 -5 m/s [31]. In the case of nano-structured systems like gels, Chui [5] expressed the hydraulic radius as a function of three very important network parameters, i.e.…”

Preparation of bacterial cellulose based hydrogels and their viscoelastic behavior

“…Because of such valuable and useful properties persisted by BC, it has huge demand in several biomedical fields like artificial skin for burn, blood vessels, wound healing material, drug delivery etc. [2,3]. Along with this, BC has already been utilized in paper making, as separation membrane, electro conductive carbon film and so on.…”

“…Moreover the abundant source of cellulose is through plants and next by different micro-organisms [3]. The pure cellulose is obtained through solvent extraction process [2]. However, there are chances for the degradation of the crystalline structure within the cellulose so cellulose obtained from bacterial source is preferred [2].…”

“…There seems to be chances for the fossil fuels to be exhausted in the coming future so interest has been focused on the development of biodegradable materials with the concern of environment and healthcare of living organisms [1]. Concern with this regard, cellulose which is one of the polysaccharides widely available in nature has attracted the attention of researchers as it is renewable and biodegradable biopolymer [2]. The cellulose in structure is a linear polymer made up of glucose molecules linked by (1-4) glyosidic linkages [3].…”

“…The pure cellulose is obtained through solvent extraction process [2]. However, there are chances for the degradation of the crystalline structure within the cellulose so cellulose obtained from bacterial source is preferred [2]. Bacterial cellulose (BC) is produced from the strain of Gluconacetobacter xylinus, which is a Gram-negative, rod shaped and aerobic bacterium [3].…”