scholarly journals Effects of chemical treatment on the structure and morphology of bacterial cellulose film

2019 ◽  
Author(s):  
Tito Arif Sutrisno ◽  
Heru Suryanto ◽  
Retno Wulandari ◽  
M. Muhajir
Keyword(s):  
Bacterial Cellulose ◽  
Chemical Treatment ◽  
Cellulose Film ◽  
Structure And Morphology

scholarly journals Effect of peroxide treatment on the structure and transparency of bacterial cellulose film

2018 ◽  
Vol 204 ◽  
pp. 05015 ◽  
Author(s):  
Heru Suryanto ◽  
Tito Arif Sutrisno ◽  
M. Muhajir ◽  
Neena Zakia ◽  
Uun Yanuhar
Keyword(s):  
Bacterial Cellulose ◽  
Diffraction Peak ◽  
Cellulose Film ◽  
X Ray Diffraction ◽  
X Ray ◽  
Structure And Morphology ◽  
Pineapple Peel ◽  
Diffraction Angle ◽  
Structure Observation ◽  
Peel Extract

The cellulose extracts from plants are need of energy and have potential in damaging the environment so that an alternative cellulose source with more efficient results is by using bacteria to produce the cellulose fibers. This study aims to determine the effect of hydrogen peroxide (H2O2) treatment on the structure and transparency of biopolymer bacterial cellulose film (BCF). The method used is the making of BCF by utilizing pineapple peel extract and then cooking at 80°C for 120 min. with H2O2 concentration of 0%, 2.5%, 5%, and 7,5%. Drying is done in the electric oven and then observed the structure and morphology using X-ray diffraction and transparency test, respectively. The result of structure observation shows that the intensity of the highest diffraction peak lies at a diffraction angle of 22° achieved at 5% peroxide treatment with crystallinity and crystal index of 85.1% and 82.4%, respectively. Transparency testing shows that the higher the concentration of peroxide used, the better the transparency.

scholarly journals Chemical Functionalization of Bacterial Cellulose Film for Enhancing Output Performance of Bio-Triboelectric Nanogenerator

2021 ◽  
Vol 12 (2) ◽  
pp. 1587-1600
Keyword(s):  
Bacterial Cellulose ◽  
Functional Groups ◽  
Mechanical Energy ◽  
Electrical Energy ◽  
Triboelectric Nanogenerator ◽  
Cellulose Film ◽  
Structure And Morphology ◽  
Output Performance ◽  
Ftir Technique ◽  
Sem Imaging

Triboelectric nanogenerator (TENG) is a promising technology for converting mechanical energy into electrical energy. In the present research, a bio-TENG based on bacterial cellulose (BC) was fabricated, and the performance was improved by surface modification. The BC films were chemically functionalized by phosphorylation and sulfonation processes. The FTIR technique confirmed the functional groups on the phosphorylated and sulfonated BCs. The hydrophobic/hydrophilic properties were studied and found that the unmodified BC, as well as the functionalized BC, were both hydrophilic. The structure and morphology of the BC nanofibers were investigated by SEM imaging. It was shown that after phosphorylation and sulfonation, the BC nanofiber surface became rougher, and the fibers were densely packed. The pores between the nanofibers almost disappeared. These have resulted from the coating of the phosphate and sulfonic functional groups on the BC nanofibers. For TENG measurement, the BC film was paired with PTFE under a single-electrode measuring mode. The functionalized BC showed improved output performance compared to the unmodified BC, possibly due to the rougher and denser BC surface and the change in the BC triboelectric potential. This research demonstrated a novel but straightforward way to enhance the output performance of the bio-TENG.

scholarly journals SINTEZA I STRUKTURA BAKTERIJSKE CELULOZE PRIMENOM BAKTERIJA SIRĆETNOG VRENJA

2021 ◽  
Author(s):  
Aleksandra Janicijevic ◽  
◽  
Suzana Filipovic ◽  
Vladimir B. Pavlovic ◽  
Aleksandra Sknepnek ◽  
...  
Keyword(s):  
Ftir Spectroscopy ◽  
Everyday Life ◽  
Bacterial Cellulose ◽  
Food Industry ◽  
Cellulose Fibers ◽  
Time Intervals ◽  
Structure And Morphology ◽  
Synthesis Parameters ◽  
Naoh Treatment

As one of the most common biopolymers on Earth, cellulose has found an important role in food industry, biomedicine andbiotechnology. The process of obtaining cellulose fibers is often followed with the presence of the byproduct, whose removal is required procedure. From that reason, the process of obtaining material on a bacterial cellulose (BC) basis,finds wide application in everyday life. Having in mind her many features, we have investigated the change in structure and morphology of BC depending on the synthesis parameters. The influence of the medium volume and different time intervals of NaOH treatment relative to different BCN yields and structure. The mentioned changes were examined by XRD, FTIR spectroscopy, as well as SEM and EDS analyzes.

Growth of Human Keratinocytes and Fibroblasts on Bacterial Cellulose Film

2006 ◽  
Vol 22 (4) ◽  
pp. 1194-1199 ◽  
Author(s):  
N. Sanchavanakit ◽  
W. Sangrungraungroj ◽  
R. Kaomongkolgit ◽  
T. Banaprasert ◽  
P. Pavasant ◽  
...  
Keyword(s):  
Bacterial Cellulose ◽  
Human Keratinocytes ◽  
Cellulose Film

Effect of the essential oils addition on the rate of bacterial cellulose surface overgrowth by mold fungi

2021 ◽  
Vol 114 ◽  
pp. 43-51
Author(s):  
Marcin Jałoweicki ◽  
Izabela Betlej
Keyword(s):  
Aspergillus Niger ◽  
Essential Oils ◽  
Bacterial Cellulose ◽  
Trichoderma Viride ◽  
Chaetomium Globosum ◽  
Cellulose Film ◽  
Film Sample ◽  
Cinnamon Oil ◽  
Cellulose Pulp ◽  
Cellulose Surface

Effect of the essential oils addition on the rate of bacterial cellulose surface overgrowth by mold fungi. The aim of this study was to determine the effectiveness of protecting films made of bacterial cellulose with essential oils against overgrowth by mold fungi. The cellulose film produced by microorganisms forming a pellicle called SCOBY was modified by introducing into the cellulose pulp essential oils: cinnamon and manuka. Samples of the protected film were treated with mold fungi: Chaetomium globosum, Aspergillus niger and Trichoderma viride. On the basis of the tests conducted, the rate of film overgrowth by mold fungi and the effectiveness criteria of cellulose film protection with essential oils were determined. The addition of cinnamon oil protected the film against the growth of Aspergillus niger and Chaetomium globosum fungi. Manuka oil slowed down the growth of Chaetomium globosum microorganisms on the surface of the bacterial cellulose film sample, but did not protect the samples from overgrowth. The essential oils tested were ineffective against the fungus Trichoderma viride.

scholarly journals Designing hydrophobic bacterial cellulose film composites assisted by sound waves

RSC Advances ◽  
2021 ◽  
Vol 11 (52) ◽  
pp. 32873-32883
Author(s):  
Manolito G. Ybañez ◽  
Drexel H. Camacho
Keyword(s):  
Graphene Oxide ◽  
Bacterial Cellulose ◽  
Ultrasonic Treatment ◽  
Composite Films ◽  
Sound Waves ◽  
Cellulose Film ◽  
Hydrophobic Properties ◽  
Fiber Network ◽  
Film Composites

Ultrasonic treatment of bacterial cellulose increased the degree of material impregnation such as graphene oxide into the fiber network that altered the hydrophobic properties of the BC-based composite films.

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