scholarly journals The investigation of producing bacterial cellulose fibres through hand-spun

2019 ◽  
Vol 131 ◽  
pp. 01052
Author(s):  
Yu Wang
Keyword(s):  
Tensile Strength ◽  
Bacterial Cellulose ◽  
Young’S Modulus ◽  
Filter Cake ◽  
Young's Modulus ◽  
Raw Material ◽  
Cellulose Fibres ◽  
Elongation At Break ◽  
Intermediate States

Nanocellulose fibres can be hand-spun from different intermediate states, such as nanocellulose paper and filter cake, which are made from the BC suspension as well as wet pellicle (WP) and dry pellicle (DP) from BC pellicles. In this study, it can be concluded that increasing the hanging weight can increase the Young’s modulus and the tensile strength of fibres. Nanofibres produced from BC pellicles as raw material have better performance than those made from BC suspension. The best properties obtained from the fibres produced from wet pellicles and suspended to a 100g hanging weight upon drying are Young’s modulus (33.8 GPa), tensile strength (610 MPa) and elongation at break (3.6%).

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.

Tensile and water absorption properties of solvent cast biofilms of sugarcane leaves fibre-filled poly(lactic) acid

2018 ◽  
Vol 33 (3) ◽  
pp. 289-304 ◽  
Author(s):  
Kuhananthan Nanthakumar ◽  
Chan Ming Yeng ◽  
Koay Seong Chun
Keyword(s):  
Tensile Strength ◽  
Lactic Acid ◽  
Water Absorption ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Poly Lactic Acid ◽  
Infrared Analysis ◽  
Absorption Properties ◽  
Elongation At Break ◽  
Bleaching Treatment

This research covers the preparation of poly(lactic acid) (PLA)/sugarcane leaves fibre (SLF) biofilms via a solvent-casting method. The results showed that the tensile strength and Young’s modulus of PLA/SLF biofilms increased with the increasing of SLF content. Nevertheless, the elongation at break showed an opposite trend as compared to tensile strength and Young’s modulus of biofilms. Moreover, water absorption properties of PLA/SLF biofilms increased with the increasing of SLF content. In contrast, the tensile strength and Young’s modulus of biofilms were enhanced after bleaching treatment with hydrogen peroxide on SLF, but the elongation at break and water absorption properties of bleached biofilms were reduced due to the improvement of filler–matrix adhesion in biofilms. The tensile and water properties were further discussed using B-factor and Fick’s law, respectively. Furthermore, the functional groups of unbleached and bleached SLF were characterized by Fourier transform infrared analysis.

Mechanical Properties of Herbal Patches from Chitosan-Based Polymer Blends for Medical Applications

2018 ◽  
Vol 917 ◽  
pp. 52-56
Author(s):  
Jirapornchai Suksaeree
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Polymer Blends ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Hydroxypropyl Methylcellulose ◽  
Peel Strength ◽  
Elongation At Break ◽  
Zingiber Cassumunar

Recently, Thai herbs are widely used as medicine to treat some illnesses. Zingiber cassumunar Roxb., known by the Thai name “Plai”, is a popular anti-inflammatory, antispasmodic herbal body and muscle treatment. This research aimed to prepare herbal patches that incorporated the 3 g of crude Z. cassumunar oil. The herbal patches made from different polymer blends were 2 g of 3.5%w/v chitosan and 5 g of 20%w/v hydroxypropyl methylcellulose (HPMC), or 2 g of 3.5%w/v chitosan and 5 g of 20%w/v polyvinyl alcohol (PVA) using 2 g of glycerin as a plasticizer. They were prepared by mixing all ingredients in a beaker and produced by solvent casting method in hot air oven at 70±2oC. The completed herbal patches were evaluated for their mechanical properties including Young’s modulus, ultimate tensile strength, elongation at break, T-peel strength, and tack adhesion. The thickness of blank and herbal patches was 0.263-0.282 mm and 0.269-0.275 mm, respectively. Young’s modulus, ultimate tensile strength, elongation at break, T-peel strength, and tack adhesion were 104.73-142.71 MPa, 87.92-93.28 MPa, 154.39-174.98 %, 3.43-4.88 MPa, and 5.29-7.02 MPa, respectively, for blank patches, and 116.83-147.28 MPa, 89.49-100.47 MPa, 133.78-159.27 %, 2.01-3.98 MPa, and 4.03-5.19 MPa, respectively, for herbal patches. We prepared herbal blended patches made from chitosan/PVA or chitosan/HPMC polymer matrix blends incorporating the crude Z. cassumunar oil. They had good mechanical properties that might be developed for herbal medicinal application.

scholarly journals Enhancement of the Thermomechanical Properties of a Fly Ash- and Carbon Black-Filled Polyvinyl Chloride Composite by Using Epoxidized Soybean Oil as a Secondary Bioplasticizer

2018 ◽  
Vol 2018 ◽  
pp. 1-8
Author(s):  
Toan Duy Nguyen ◽  
Chinh Thuy Nguyen ◽  
Van Thanh Thi Tran ◽  
Giang Vu Nguyen ◽  
Hai Viet Le ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Fly Ash ◽  
Carbon Black ◽  
Soybean Oil ◽  
Young’S Modulus ◽  
Polyvinyl Chloride ◽  
Young's Modulus ◽  
Epoxidized Soybean Oil ◽  
Melt Mixing ◽  
Elongation At Break

Plasticized polyvinyl chloride (PVC) was fabricated using epoxidized soybean oil (ESBO) as a secondary bioplasticizer with dioctyl phthalate (DOP). The PVC/MFA/CB composites were prepared by melt mixing of the plasticized PVC with modified fly ash (MFA), carbon black N330 (CB), and polychloroprene (CR) in a Haake Rheomix mixer using a rotation speed of 50 rpm at 175°C for 6 min and then compressed by Toyoseiki pressure machine under 15 MPa. The effect of ESBO content on morphology, melt viscosity, tensile properties, and flame retardancy of PVC/MFA/CB composites was investigated. The obtained results showed that the incorporation of ESBO has significantly enhanced the processing ability, Young’s modulus, tensile strength, and elongation at break of the PVC/MFA/CB composites. The torque of PVC/MFA/CB composites was increased to approximately 12% when 50 wt% of DOP was replaced by ESBO. When ESBO was 20 wt% in comparison with DOP weight, the elongation at break, tensile strength, and Young’s modulus of the composites were increased to 48%, 24%, and 4.5%, respectively. Correspondingly, thermogravimetric analysis results confirmed that ESBO had improved the thermostability of the PVC composites. The ESBO have potential as a secondary bioplasticizer replacement material for DOP owing to their better thermomechanical stability.

Hybrid Nanocomposites of Poly(Lactic Acid)/Thermoplastic Polyurethane with Nanosilica/Montmorillonite

2019 ◽  
Vol 947 ◽  
pp. 77-81
Author(s):  
Natsuda Palawat ◽  
Phasawat Chaiwutthinan ◽  
Sarintorn Limpanart ◽  
Amnouy Larpkasemsuk ◽  
Anyaporn Boonmahitthisud
Keyword(s):  
Thermal Stability ◽  
Tensile Strength ◽  
Impact Strength ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Thermoplastic Polyurethane ◽  
Hybrid Nanocomposites ◽  
Poly Lactic Acid ◽  
Elongation At Break ◽  
Thermal Stability Of

The aim of this study is to improve the physical properties of poly(lactic acid) (PLA) by incorporating thermoplastic polyurethane (TPU), organo-montmorillonite (OMMT) and/or nanosilica (nSiO2). PLA was first melt mixed with five loadings of TPU (10–50 wt%) on a twin-screw extruder, followed by injection molding. The addition of TPU was found to increase the impact strength, elongation at break and thermal stability of the blends, but decrease the tensile strength and Young’s modulus. Based on a better combination of the mechanical properties, the 70/30 (w/w) PLA/TPU blend was selected for preparing both single and hybrid nanocomposites with a fix total nanofiller content of 5 parts per hundred of resin (phr), and the OMMT/nSiO2 weight ratios were 5/0, 2/3, 3/2 and 0/5 (phr/phr). The Young’s modulus and thermal stability of the nanocomposites were all higher than those of the neat 70/30 PLA/TPU blend, but at the expense of reducing the tensile strength, elongation at break and impact strength. However, all the nanocomposites exhibited higher impact strength and Young’s modulus than the neat PLA. Among the four nanocomposites, a single-filler nanocomposite containing 5 phr nSiO2 exhibited the highest impact strength and thermal stability, indicating that there was no synergistic effect of the two nanofillers on the investigated physical properties. However, the hybrid nanocomposite containing 2/3 (phr/phr) OMMT/nSiO2 possessed a compromise in the tensile properties.

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.

scholarly journals PENGARUH KONSENTRASI PATI UBI TALAS (Colocasia esculenta) DAN JENIS PLASTICIZER TERHADAP KARAKTERISTIK BIOPLASTIK

2019 ◽  
Vol 7 (3) ◽  
pp. 457
Author(s):  
Farida Unggul Situmorang ◽  
Amna Hartiati ◽  
Bambang Admadi Harsojuwono
Keyword(s):  
Tensile Strength ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Block Design ◽  
Colocasia Esculenta ◽  
Ftir Analysis ◽  
Elongation At Break ◽  
Randomized Block Design

This study aims to know the effect of the concetration of taro tuber starch and plasticizer type and their interactions on the characteristics of bioplastics, and to determine the concentration of taro tuber starch and plasticizer type which produces bioplastics with the best characteristics. The research used factorial randomized block design. The first factor is the concentration of taro tuber starch consisting of 3 levels 5, 6 and 7% (w/w). The second factor is the plasticizer type consisting of 3 levels that is glycerol, sorbytol and mixture plasticizer glycerol and sorbitol (1:1). Each treatment are grouped into two time-based of making bioplastics so there are 18 experimental units. Variabels observed tensile strength, elongation at break, Young’s modulus, swelling, biodegradation and FTIR. The data obtained were analyzed of variant and test Tukey’s. The result showed that the concentration of taro tuber starch and type of plasticizer had a very significant effect on tensile strength, elongation at break, Young’s Modulus and swelling but the type of plasticizer had no significant effect on biodegradation. Interaction between treatments has a very significant effect on Young’s Modulus and swelling, a significant effect on tensile strength and no significant effect on elongation at break and biodegradation. The concentration of starch 6% with plasticizer glycerol produces the best characteristics of bioplastics with tensile strength 2.270 0.057 MPa, elongation at break 14.5 0.01 %, Young’s modulus 15.683 1.155 MPa, swelling 29.88 1.02 % and biodegradability 6-7 days. FTIR analysis proved the existence of hydroxyl (O-H), carbonyl (C=O), C=C aromatic, carboxyl (C-O), C-H aromatic, and hydrocarbons –(CH2)n in the bioplastic. Keywords: Bioplastics, concentration of taro tuber starch, glycerol, sorbytol  

Ultrafine Wollastonite Reinforced Polypropylene/Ethylene Propylene Diene Rubber Thermoplastic Elastomers

2012 ◽  
Vol 488-489 ◽  
pp. 945-949 ◽  
Author(s):  
Saowaroj Chuayjuljit ◽  
Thatisorn Karnjanamayul
Keyword(s):  
Thermal Stability ◽  
Tensile Strength ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Thermoplastic Elastomers ◽  
Dependent Manner ◽  
Elongation At Break ◽  
Ethylene Propylene ◽  
Ethylene Propylene Diene Rubber ◽  
Diene Rubber

In this study, tensile properties, thermal stability and morphology of polypropylene/ethylene propylene diene rubber/wollastonite (PP/EPDM/wollastonite) thermoplastic elastomer composites were tested and evaluated as a function of their compositions in comparison with PP/EPDM blends and native PP. PP was melt mixed with two loadings of EPDM (20 and 30% (w/w)) and for the composites each of these with three loadings of wollastonite (10, 20 and 30 parts by weight per hundred of the PP/EPDM resin) on a twin screw extruder and then injection molded. Both PP/EPDM blends provided a higher elongation at break but a lower tensile strength and Young’s modulus as compared with those of the neat PP. However, the addition of wollastonite microparticles (particle size of 1200 mesh) into the blends increased the Young’s modulus in a dose-dependent manner with increasing wollastonite loadings, whilst the tensile strength and elongation at break were decreased. Moreover, the thermal stability was improved by the presence of either EPDM or wollastonite in the PP matrix.

Natural Rubber-Whisker Alumina Fiber Composite Materials for Mechanical and Thermal Insulation Applications

2018 ◽  
Vol 789 ◽  
pp. 221-225
Author(s):  
Nattapol Dedruktip ◽  
Wasan Leelawanachai ◽  
Nuchnapa Tangboriboon
Keyword(s):  
Thermal Conductivity ◽  
Tensile Strength ◽  
Thermal Properties ◽  
Natural Rubber ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Curing Temperature ◽  
Mechanical And Thermal Properties ◽  
Alumina Fiber ◽  
Elongation At Break

Alumina fiber is a ceramic material used as a dispersed phase or filler to reinforce the mechanical and improve thermal properties of natural rubber via vulcanization process at curing temperature 150°C. The amount of alumina fiber added in natural rubber was varied from 0 to 50 phr on 100 phr of natural rubber in a sulfur curing system. Adding 10 phr alumina fiber affects to obtain the best natural rubber composite samples having good mechanical and thermal properties. Tensile strength, elongation at break, Young’s modulus and thermal conductivity of adding 10 phr whisker alumina fiber encoded NR-Al-10 are equal to 14.38±1.95 MPa, 1038.4±41.45%, 545.63±25.67 MPa and 0.2376±0.0003 W/m.K, respectively, better than those of pure natural rubber compounds without adding alumina fiber. Tensile strength, elongation at break, Young’s modulus and thermal conductivity of natural rubber without adding alumina fiber are equal to 14.06±6.03 MPa, 949.41±52.15%, 496.32±8.54 MPa and 0.2500±0.0003 W/m.K, respectively.

Physicochemical and Mechanical Properties of Rice Bran Protein Hydrolysate-Loaded Films

2020 ◽  
Vol 859 ◽  
pp. 9-14
Author(s):  
Thaniya Wunnakup ◽  
Chaowalit Monton ◽  
Laksana Charoenchai ◽  
Duangdeun Meksuriyen
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Moisture Content ◽  
Young’S Modulus ◽  
Rice Bran ◽  
Young's Modulus ◽  
Protein Hydrolysate ◽  
Homogeneous Mixture ◽  
Elongation At Break ◽  
Rice Bran Protein

The objective of this study was to apply rice bran protein hydrolysates (RBH) as bioactive additives of gelatin/Eudragit® NE 30D film and characterize the physicochemical and mechanical properties of its. The RBH was obtained by extraction with 2% sodium chloride (RBH-NaCl) and 0.1 N sodium hydroxide (RBH-NaOH) followed by digestion with Alcalase®. Then, RBH was incorporated in gelatin/Eudragit® NE 30D film. Effect of RBHs on film thickness, moisture content, pH, Young's modulus, tensile strength and the elongation at break were investigated. The RBH-NaCl enriched film showed non-homogeneous mixture and reduced moisture content, tensile strength and the elongation at break (1.8 – 2 folds). However, the RBH-NaOH enriched film exhibited a few non-homogeneous mixture and the Young's modulus was slightly decreased. The pH value was increased in the range of 6.77 – 6.88. Our results provide insight for the potential to develop RBH containing films as topical products.

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