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Volume 8, Issue 6 (Suppl)
J Bioremediat Biodegrad, an open access journal
ISSN:2155-6199
Biopolymers & Bioplastics 2017
October 19-20, 2017
October 19-20, 2017 San Francisco, USA
7
th
International Conference and Exhibition on
Biopolymers and Bioplastics
Recent advances in bacterial nanocellulose for different applications
S
The last years of advances in research have demonstrated the importance and potential of biopolymers for a variety of
applications, particularly for biopolymers produced by microorganisms, including bacterial nanocellulose (BNC). These
polymers can be biosynthesized by bacteria of some genera, but the most efficient producers of cellulose belong to the genus
Gluconacetobacter, that secrets an abundant 3-D network of cellulose fibrils. There are two main methods for producing
BNC: static culture, which results in the accumulation of a thick, leather-like white BNC pellicle at the air-liquid interface,
and stirred culture, in which cellulose is synthesized in a dispersed manner in the culture medium, forming irregular pellets.
BNC can also be synthesized from a variety of substrates such as glucose, sucrose, fructose, glycerol, mannitol, among others.
In this way it is possible to modify and control the physical properties of the cellulose during its biosynthesis. Factors such as
yield, morphology, structure, and physical properties may be affected by the method of production and culture medium used.
The thickness, color and transparency of the membrane can be controlled by means of the culture time of the bacterium. The
BNC appears as a competitive alternative, having as main characteristics: high crystallinity, high tensile strength, elasticity,
durability, hydrophilic potential (retention capacity and water absorption - about 98% to 99% of its volume is composed
of liquids). In the food industry, it is used in the production of coconut cream, ice cream, snacks, sweets, stabilizers for
emulsions and foams. In the cosmetics industry BCN is used as moisturizers and astringents. BNC is also used as an additive
of high quality papers, membranes for high quality audio devices, electronic papers (e-papers), diaphragms for eletroacustic
transducers, liquid crystal displays, OLED support, ultrafiltration membranes (water purification) and membranes for mineral
oil recovery. In the biomedical area BCN is suitable for tissue regeneration, drug delivery systems, vascular grafts, scaffolds for
tissue engineering, artificial blood vessels and microvessels, artificial vascular implant, dental implants, artificial skin, dressing
for wounds and burns, allowing the transfer of medications to the wound while serving as an effective physical barrier against
external infection. In the materials area NCB whiskers can also be used as reinforcement in nanocomposites.
Biography
Ana Paula Testa Pezzin. Graduated in Chemistry, Master in Chemical Engineering and PhD in Mechanical Engineering from the State University of Campinas.
She did postdoctoral studies at the Université Pierre et Marie Curie in Paris / France. She has been a leader in the POLYMERIC MATERIALS GROUP since 2001,
working in research lines: Polymeric biomaterials for medical and dental applications; Composites, biocomposites, nanocomposites and bionanocomposites;
Modification of biopolymers for different applications and synthesis and characterization of biopolymers by microbial culture. Currently, she is a Professor and
Researcher at the University of Joinville Region (UNIVILLE), being a level 2 productivity fellow at CNPq.
anapezzin@yahoo.com.brAna Paula Testa Pezzin
University of Joinville Region (UNIVILLE), Brazil
Ana Paula Testa Pezzin, J Bioremediat Biodegrad 2017, 8:6 (Suppl)
DOI: 10.4172/2155-6199-C1-010