The Effect of Glycerol Concentration on Biocomposite Bacterial Cellulose-Chitosan Characterization as Dura Mater Artificial

2020 ◽  
Vol 45 ◽  
pp. 40-48
Author(s):  
Fitria Renata Bella ◽  
Prihartini Widiyanti ◽  
Aminatun
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Bacterial Cellulose ◽  
Dura Mater ◽  
Functional Group ◽  
Chitosan Solution ◽  
Cytotoxicity Test ◽  
Glycerol Concentration ◽  
Chitosan Membrane ◽  
Cellulose Membranes

Bacterial cellulose and chitosan have been widely developed for biomaterial applications, one of which is used as a dura mater artificial. In designing dura mater artificial, there are several criteria that must be met, one of which is mechanical that can be seen through tensile strength and elongation value. In previous study, the mechanical properties of biocomposite bacterial cellulose-chitosan still too rigid and did not meet the standard. This research was conducted to determine the effect of the addition of glycerol concentration to the physical and biological of bacterial cellulose-chitosan membrane. Bacterial cellulose membranes with the addition of glycerol concentration of 0%; 0,25%; 0,5% and 0,75% were dried with oven and immersed for 6 hours in 0.5% chitosan solution. Characterization was performed by functional group, morphology, tensile strength, swelling, degradation and cytotoxicity test. Based on the results, it can conclude that biocomposite bacterial cellulose-chitosan-glycerol showed suitable characteristics as a dura mater artificial.

scholarly journals Bacterial Cellulose-Chitosan-Glycerol Biocomposite as Artificial Dura Mater Candidates for Head Trauma

2018 ◽  
Vol 36 ◽  
pp. 7-16 ◽  
Author(s):  
Rara Setya Angtika ◽  
Prihartini Widiyanti ◽  
Aminatun
Keyword(s):  
Tensile Strength ◽  
Bacterial Cellulose ◽  
Dura Mater ◽  
Control Sample ◽  
Chitosan Solution ◽  
Cytotoxicity Test ◽  
Glycerol Concentration ◽  
Oh Groups ◽  
Standard Value ◽  
Degradation Test

Bacterial cellulose used for many membrane applications such as artificial dura mater membrane. This research aimed to determine the effects of glycerol concentration variation as plasticizer on physical and biological characteristics of bacterial cellulose-chitosan biocomposite membrane.Bacterial cellulose-glycerol membrane was soaked for six hours in 0.5% chitosan solution together with glycerol at variuos concentrations of 0.5%, 1%, 1.5%, and 2% using freeze dry method. Based on results of FTIR test, there is a crosslinking between-OH groups in bacterial cellulose and chitosan-glycerol. Meanwhile, results of the physical characteristic tests showed tensile strength value of 29.40 MPa for the control sample and 142.24 MPa for samples of bacterial cellulose-chitosan added 2% glycerol. It indicates that the addition of glycerol can increase tensile strength value. Results of morphological test, depicted pore size of 93.30-216 nm. Results of the degradation test demonstrated that samples added 2% glycerol degraded as much as 50.15% for 2 weeks. Meanwhile, results of the cytotoxicity test indicated that all of samples were not toxic. Finally, it can be concluded that the best result of the characterization analysis was found on the samples added 2% glycerol although they have not yet fulfilled the standard value of artificial dura mater.

SINTESIS DAN MODIFIKASI STRUKTUR DAN PORI MEMBRAN KITOSAN TERCROSSLINK UNTUK STERILISASI MEDIA PERTUMBUHAN BAKTERI

2019 ◽  
Vol 3 (2) ◽  
pp. 27
Author(s):  
Emma Savitri ◽  
Natalia Suseno ◽  
Tokok Adiarto
Keyword(s):  
Tensile Strength ◽  
Chitosan Solution ◽  
Curing Temperature ◽  
Growth Media ◽  
Optimum Conditions ◽  
Separation Processes ◽  
Crosslinking Process ◽  
Chitosan Membrane ◽  
Chitosan Membranes ◽  
Crosslinked Chitosan

Many mass-transfer applications have used chitosan membrane in separation processes. This research applied crosslinked chitosan membrane to sterillize bacterial growth media. Chitosan membranes having 79 % DD were produced by casting and drying chitosan solution. The images of the membrane were characterized by SEM and other characterizations such as permeability, permselectivity and tensile strength were investigated. The flux increased with longer submersion period but the rejection decreased. Otherwise, the flux decreased and rejection increased in line with an increase in curing temperature. Tensile strength increased with the increase of submersion period and curing temperature. The optimum conditions of crosslinking process are 2 hours of submersion periods and curing temperature at 90 oC.  It gives flux 5.8930 L/jam.m2, rejection 97.47 % and tensile strength 49640 kN/m2

Effect of Castor Oil Impregnation on the Physical and Mechanical Properties of Bacterial Cellulose

2012 ◽  
Vol 3 (1) ◽  
pp. 13-26
Author(s):  
Myrtha Karina ◽  
Lucia Indrarti ◽  
Rike Yudianti ◽  
Indriyati
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Bacterial Cellulose ◽  
Young’S Modulus ◽  
Castor Oil ◽  
Young's Modulus ◽  
Physical And Mechanical Properties ◽  
Scanning Electron Micrographs ◽  
Elongation At Break ◽  
Acetone Water

The effect of castor oil on the physical and mechanical properties of bacterial cellulose is described. Bacterial cellulose (BC) was impregnated with 0.5–2% (w/v) castor oil (CO) in acetone–water, providing BCCO films. Scanning electron micrographs revealed that the castor oil penetrated the pores of the bacterial cellulose, resulting in a smoother morphology and enhanced hydrophilicity. Castor oil caused a slight change in crystallinity indices and resulted in reduced tensile strength and Young's modulus but increased elongation at break. A significant reduction in tensile strength and Young's modulus was achieved in BCCO films with 2% castor oil, and there was an improvement in elongation at break and hydrophilicity. Impregnation with castor oil, a biodegradable and safe plasticiser, resulted in less rigid and more ductile composites.

scholarly journals Influence of Drying Temperature on Tensile and Bursting Strength of Bacterial Cellulose Biofilm

2019 ◽  
Vol 25 (3) ◽  
pp. 316-321
Author(s):  
Florentina SEDERAVIČIŪTĖ ◽  
Jurgita DOMSKIENĖ ◽  
Ilze BALTINA
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Bacterial Cellulose ◽  
Strength Properties ◽  
Drying Temperature ◽  
Bursting Strength ◽  
Bacterial Fermentation ◽  
Deformation Properties ◽  
C 50 ◽  
Material Preparation

The article presents an experimental study of mechanical properties of cellulose biofilm produced by bacterial fermentation process. Naturally derived biomaterial has great current and potential applications therefore the conditions of material preparation as well as control and prediction of mechanical properties is still a relevant issue. Bacterial cellulose was obtained as a secondary product from Kombucha drink. Presented technique for material preparation and drying is particularly simple and easy to access. The influence of drying temperature (25 °C, 50 °C and 75 °C) on the sample size (thickness and planar dimensions) and mechanical properties (tensile and bursting strength) of cellulose biofilm has been evaluated. It was estimated that during drying biofilm specimens lost up to 92 % of weight and up to 87 % of thickness therefore planar specimen dimensions varied insignificantly. The study showed that the drying temperature is important for optimum strength properties of bacterial cellulose biofilm. The maximum tensile strength (27.91 MPa) was recorded for the samples dried at temperature of 25 °C, when the moisture from the biomaterial is removed gradually and good deformation properties are ensured (respectively tensile extension 18.8 %). Under higher drying temperature biomaterial shows lower values of tensile strength and higher values of bursting strength. The maximum bursting strength (57.2 MPa) was recorded for samples dried at 75 °C when punch displacement changes were insignificant for all tested samples (from 17.8 mm to 21.7 mm). DOI: http://dx.doi.org/10.5755/j01.ms.25.3.20764

Transparent composites prepared from bacterial cellulose and castor oil based polyurethane as substrates for flexible OLEDs

2015 ◽  
Vol 3 (44) ◽  
pp. 11581-11588 ◽  
Author(s):  
E. R. P. Pinto ◽  
H. S. Barud ◽  
R. R. Silva ◽  
M. Palmieri ◽  
W. L. Polito ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Bacterial Cellulose ◽  
Young’S Modulus ◽  
Castor Oil ◽  
Young's Modulus ◽  
Visible Region ◽  
Transparent Composites

Flexible and transparent BC/PU composites were prepared, which exhibit excellent transparency (up to 90%) in the visible region and great mechanical properties, with a tensile strength of up to 69 MPa and a Young's modulus of up to 6 GPa.

Physical and mechanical properties of agar based edible film with glycerol plasticizer

2017 ◽  
Author(s):  
Arham Rusli
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Film Thickness ◽  
Food Packaging ◽  
Base Material ◽  
Physical And Mechanical Properties ◽  
Edible Film ◽  
Glycerol Concentration ◽  
Elongation At Break

Appropriate concentration of base material and plasticizer is required to obtain good physical and mechanical properties of edible film for food packaging and preservation functions. The aim of this study was to obtain the best combination of the base material and plasticizer in the manufacture of agar films based on physical and mechanical properties. Results showed that the physical and mechanical properties of the agar edible film were affected by the agar and glycerol concentrations. Increasing agar concentrations resulted in the increase in the film thickness, tensile strength (TS), and elongation at break (EAB), but decreased the filmsolubility. While increasing glycerol concentration tended to increase the film thickness and solubility, but decrease the TS of the film. The best concentration combination of agar and glycerol in this study was 3 and 10%, respectively.

scholarly journals KARAKTERISASI BIOPLASTIK DARI RUMPUT LAUT (EUCHEUMA COTTONII) DAN PATI SINGKONG DENGAN PENAMBAHAN PATI BIJI ALPUKAT

2019 ◽  
Vol 4 (2) ◽  
pp. 59-64
Author(s):  
Gracia Ramadhani Putri
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Everyday Life ◽  
Functional Group ◽  
Group Analysis ◽  
Cassava Starch ◽  
Tropical Fruit ◽  
Functional Group Analysis ◽  
Eucheuma Cottonii ◽  
Main Material

The increasing use of plastics in everyday life results in environmental pollution. Synthetic plastic isdifficult to be degraded in nature, so we need the main material for making environmentally friendlyplastics. This research was conducted to synthesize seaweed-based biodegradable plastic (Eucheumacottonii) mixed with cassava starch and polysaccharides derived from various tropical fruit seeds thatare widely available in Indonesia such as avocado and durian with a composition ratio of 3:8:1.Characterization carried out included functional group analysis with FTIR, mechanical properties(tensile strength) and biodegradability.

scholarly journals PENGARUH PENAMBAHAN PLASTICIER GLISEROL TERHADAP KARAKTERISTIK HIDROGEL KITOSAN-GLUTARALDEHID UNTUK APLIKASI PENUTUP LUKA

2014 ◽  
Vol 14 (1) ◽  
pp. 18 ◽  
Author(s):  
Djony Izak Rudyardjo
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Acetic Acid ◽  
Surface Structure ◽  
Wound Dressing ◽  
Water Resistance ◽  
Glycerol Concentration ◽  
A Value ◽  
Glutaraldehyde Solution ◽  
Hydrogel Surface

PENGARUH PENAMBAHAN PLASTICIER GLISEROL TERHADAP KARAKTERISTIK HIDROGEL KITOSAN-GLUTARALDEHID UNTUK APLIKASI PENUTUP LUKA ABSTRAK Telah dilakukan penelitian untuk mengetahui pengaruh penambahan plasticizer gliserol terhadap karakteristik hidrogel kitosan-glutaraldehid untuk aplikasi penutup luka. Penambahan gliserol bertujuan agar hidrogel kitosan-glutaraldehid lebih fleksibel dan memiliki sifat mekanik yang baik sehingga dapat diaplikasikan sebagai penutup luka sesuai dengan standar yang ada. Pembuatan hidrogel dilakukan dengan cara mencampurkan kitosan yang dilarutkan dalam 1% asam asetat dengan 1% larutan glutaraldehid pada perbandingan 50 : 3 (v/v) dan ditambahkan gliserol dengan variasi volume 1 ml – 4 ml. Konsentrasi gliserol yang digunakan tidak lebih dari 2%. Berdasarkan penelitian yang telah dilakukan, penambahan gliserol menyebabkan ketebalan, kuat tarik, dan kemampuan mengabsorbsi cairan hidrogel menurun; elongasi dan ketahanan terhadap air  hidrogel meningkat; serta struktur hidrogel menjadi lebih halus. Berdasarkan hasil uji sifat mekanik, hasil terbaik ditunjukkan oleh hidrogel kitosan-glutaraldehid-gliserol dengan penambahan gliserol 2% sebanyak 2 ml, yang memiliki nilai kuat tarik sebesar 14,34 ± 1,90 MPa dan elongasi sebesar 2,40 ± 0,91% yang memenuhi standar sifat mekanik kulit manusia. Struktur permukaan hidrogel tersebut halus, homogen, memiliki ketahanan terhadap air sebesar 24,78 ± 6,57% serta mampu mengabsorbsi cairan lebih dari 99,9% yaitu sebesar 149,65 ± 22,46% yang merupakan karakteristik penting hidrogel. Jadi, dapat disimpulkan bahwa hidrogel kitosan-glutaraldehid-gliserol dengan penambahan gliserol 2% sebanyak 2 ml dapat diaplikasikan sebagai penutup luka. Kata kunci: Glutaraldehid, Gliserol, Hidrogel, Kitosan, Penutup Luka, Plasticizer   THE EFFECT OF ADDITION GLYCEROL AS PLASTICIER TO THE CHARACTERISTICS OF CHITOSAN-GLUTARALDEHYDE HIDROGEL FOR WOUND DRESSING APPLICATION ABSTRACT The research had been done to determine the effect of addition glycerol as plasticizer to the characteristics of chitosan-glutaraldehyde hydrogel for wound dressing application. The addition of glycerol was served to increase flexibility and improve the mechanical properties of chitosan-glutaraldehyde hydrogel that can be applied as a wound dressing accordance with existing standards. Preparation of hydrogel was made by mixing chitosan dissolved in 1% acetic acid with 1% glutaraldehyde solution with ratio 50 : 3 (v/v) and added by glycerol with variation of 1 ml - 4 ml. The glycerol concentration used no more than 2%. Based on the research that had been done, the addition of glycerol caused thickness, tensile strength, and the absorption ability of hydrogel was decreased; elongation and water resistance of hydrogel increased; and the surface structure of hydrogel is more smooth. Based on the result of mechanical properties, the best characteristics of chitosan-glutaraldehyde-glycerol hydrogel is shown with the addition of 2 ml glycerol 2% composition which has a value of tensile strength of 14,34 ± 1,90 MPa and elongation at 2,40 ± 0,91 % that meet the standards of the mechanical properties of human skin. The structure of that hydrogel surface is smooth, homogeneous, has a water resistance of 24,78 ± 6,57%, and is able to absorb liquid more than 99,9% in the amount of 149,65 ± 22,46 % which is an important characteristic of the hydrogel. So, the chitosan-glutaraldehyde-glycerol hydrogel with the addition of 2 ml glycerol 2% can be applied as a wound dressing. Keywords : Chitosan, Glutaraldehyde, Glyserol, Hydrogel, Plasticizer, Wound Dressing

scholarly journals THE INFLUENCE OF COMPOSITION OF CNT (CARBON NANOTUBE) ON THE PHYSICAL PROPERTIES OF BIOPLASTIC MADE FROM CASSAVA STARCH

2019 ◽  
Vol 20 (4) ◽  
pp. 174
Author(s):  
Masitoh Mangsur ◽  
Akbar Hanif Dawam Abdullah ◽  
Rahmat Firman Septiyanto ◽  
Yus Rama Denny Muchtar ◽  
Isriyanti Affifah
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Carbon Nanotube ◽  
Aspergillus Niger ◽  
Physical Properties ◽  
Functional Group ◽  
Morphological Characteristics ◽  
Cassava Starch ◽  
Test Results ◽  
Hot Press

Bioplastics are starch-based polymers that are easily degraded by microorganisms, so they can be used as an alternative to the use of conventional plastics. In this research, bioplastics made from cassava starch was made using glycerol as plasticizer and used MWCNTs (Multi-Wall CNTs) type CNT as reinforcement with variations in the composition of 0%, 1%, 2%, and 3%. Bioplastics are made with a dry method (dry blending) with stages of pre-mixing, mixing, hot press and cold press. Characteristics of bioplastic starch/CNT include tensile strength, biodegradation and morphological. The test results show that the addition of CNT composition affects the mechanical properties of bioplastics. The optimum value of tensile strength occurred in the addition of 2% CNT at 13.52 MPa. Biodegradable test results using the Aspergillus niger mushroom prove that bioplastic starch/CNT can be degraded well. The results of morphological characteristics in the form of SEM results showed that 3% bioplastic starch / CNT had cracks and resulted in decreased tensile strength. FTIR test results indicate the presence of a new functional group C≡C because of the addition of CNT.

scholarly journals KARAKTERISASI KOMPOSIT POLIURETAN DENGAN PENGISI (FILLER) MIKRO KARBON AKTIF DARI CANGKANG KELAPA SAWIT

2020 ◽  
Vol 2 (1) ◽  
pp. 7-15
Author(s):  
Pada Mulia Raja
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Activated Carbon ◽  
Palm Oil ◽  
Functional Group ◽  
Polypropylene Glycol ◽  
Oh Groups ◽  
Palm Shell ◽  
A Value

Polyurethane is a type of polymer made by reacting polyol (OH) groups with isocyanate (NCO) groups. The purpose of this study was to determine the mechanical properties of a mixture of polyol and toluene sources as well as by adding the composition of activated carbon of palm shell as a filler to determine the best results. The materials used in making composites are PPG (Polypropylene Glycol), TDI (Toluent DiIsocyanate) and Palm Oil Shell Activated Carbon. Palm shells are carbonated at 600 ◦C, then made into powder using a ball mill and then sieved with 110 mesh particle sieve and activated using 10% H2SO4. Furthermore Polyurethanes are made by mixing, PPG (Polypropylene Glycol), TDI (Toluent in Isocyanate) with a ratio of 60%: 40% and then added the activated carbon of palm oil shell as a filler with polyurethane: 95% active carbon (P1), 90 %: 10% (P2), 80%; 20% (P3), and 75%: 25% (P4), then the functional group (FT-IR) and mechanical properties testing consisted of tensile strength and elasticity values. The results of the characterization of amine (NH), methyl groups (C-H3), Acetyl groups (CN), carbonyl groups (C = O), isocyanate groups (N = C = O), and Aromatic Rings (C = C) . This can be concluded after the addition of activated carbon palm shell does not cause chemical reactions in the functional group. While the results of the characterization of the tensile strength of P0 to P1 with a value of 0.1966 MPa to 0.0317 MPa, then increased in the composition of 90 P2, P3, and P4 with values of 0.0985 MPa, 0.2318 MPa, 0.2981MPa, and finally occurred decrease again in the composition of P5. While the highest elasticity value on composites with a ratio of P4 is 0.05196 MPa, while the lowest elasticity value on the composition of P5 with a value of 0.0475 MPa.  

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