Preparation and Mechanical Properties of Short Antheraea pernyi Silk Fiber Reinforced Onion Composite

2013 ◽  
Vol 842 ◽  
pp. 110-113
Author(s):  
Ruo Yuan Song ◽  
Lai Jiu Zheng ◽  
Yu Ping Zhao ◽  
Yong Fang Qian
Keyword(s):  
Tensile Property ◽  
Matrix Material ◽  
Fiber Content ◽  
Silk Fiber ◽  
Cellulose Microfibrils ◽  
Morphological Observation ◽  
Green Composite ◽  
Composite Surface ◽  
Antheraea Pernyi ◽  
Onion Cell

To protect resource and environment, recently, the effective recycling of waste natural resources has been paid increased attention by many countries. In this study, the waste onion was used as the matrix material, and the Antheraea pernyi (A. pernyi) silk was used as the reinforcement fiber. The silk/onion composite paper with different fiber content was developed by papermaking technology. The morphological observation and tensile property tests were done. The consequence indicated that the onion had definite matrix property. Onion cell is also looked as a natural nanocomposite reinforced with cellulose microfibrils. The produced onion paper had a tensile strenght of 29.31 MPa and elongation of 1.14%. The A. pernyi silk fiber originated from waste silk quilt had the good reinforcing property for onion matrix, and the tensile property of onion-based composite with different silk fiber content was investigated. The tensile strength of this green-composite were improved remarkably to 46.2 MPa with increasing 31.75 wt% fiber content. The tensile property of this composite can be futher improved by changing the length of silk fiber and coating additives on the composite surface.

Utilization of recycled hazardous waste bagasse as reinforcement to develop green composite material

2020 ◽  
Vol 17 (3) ◽  
pp. 399-406 ◽  
Author(s):  
Shashi Prakash Dwivedi ◽  
Garima Dwivedi
Keyword(s):  
Composite Material ◽  
Soil Pollution ◽  
Matrix Material ◽  
Partial Replacement ◽  
Green Composite ◽  
Waste Products ◽  
Ceramic Particles ◽  
Content Type ◽  
Base Composite ◽  
Bagasse Waste

Purpose In the current scenario, air pollution and soil pollution from the industries wastes are one of the major problems all over the world. Further, disposal of these wastes from industries are very costly. However, several attempts were carried out by various researchers in the past to use these wastes. One of the most common waste products is bagasse from sugar industries. These hazardous bagasse wastes lead to air and soil pollution. This study aims to recycle bagasse waste in the development of aluminium base composite as partial replacement of ceramic particles. Design/methodology/approach In the present investigation, recycled bagasse waste was used in the development of aluminium base composite as partial replacement of ceramic particles such as SiC, Al2O3 and B4C. Production industries of these ceramic particles (SiC, B4C and Al2O3) emit huge amount of greenhouse gases such as N2O3, CH4, CO2 and H2O. These green house gases produce lots of environment problem. Furthermore, production of these ceramic particles is also costly. AA6061 aluminium alloy was taken as matrix material. Composite material was developed using the stir casting technique. Findings Microstructure results showed proper distribution of bagasse ash and MgO powder in the aluminium base metal matrix composite. It was notified from analysis that minimum corrosion loss and minimum porosity were found for Al/2.5% bagasse ash/12.5% MgO powder composite. For the same composition, hardness and thermal expansion were also observed better as compared to other selected compositions. However, density and cost of composites continuously decrease by increasing percentage of bagasse ash in development of composite. Originality/value Results showed about 11.30% improvement in tensile strength, 11.64% improvement in specific strength and 40% improvement in hardness by using bagasse ash as reinforcement with MgO powder in development of aluminium base composite.

Understanding the Mechanical Properties and Structure Transition of Antheraea pernyi Silk Fiber Induced by Its Contraction

2018 ◽  
Vol 19 (6) ◽  
pp. 1999-2006 ◽  
Author(s):  
Yu Wang ◽  
Jianchuan Wen ◽  
Bo Peng ◽  
Bingwen Hu ◽  
Xin Chen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Silk Fiber ◽  
Structure Transition ◽  
Antheraea Pernyi

scholarly journals Utilization of RHA in development of green composite material using RSM

2019 ◽  
Vol 28 (1) ◽  
pp. 20-28 ◽  
Author(s):  
Shashi Prakash Dwivedi ◽  
Garima Dwivedi
Keyword(s):  
Tensile Strength ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Rice Husk ◽  
Metal Matrix ◽  
Matrix Material ◽  
Secondary Reinforcement ◽  
Green Composite ◽  
Weight Percentage ◽  
Reinforcement Material

AbstractIn the present investigation, rice husk waste from rice mill was utilized in the development of aluminum based green metal matrix composite. Response surface methodology (RSM) was employed to develop green metal matrix composite by considering tensile strength as a response. Rice husk ash (RHA) was used as primary reinforcement material and B4C was used as a secondary reinforcement material in the development of composite. Microstructure results showed a uniform distribution of RHA and B4C in aluminum based matrix material. The optimum combination of reinforcement parameters was found to be RHA weight percentage of 7.8%, RHA preheats temperature of 231.12∘C, B4C preheats temperature of 435.24∘C and B4C wt.% of 6.67% respectively to achieve a tensile strength of 249.867 MPa.

Characterization and Properties of Antheraea pernyi Silk Finished with Reactive Quaternary Ammonium Salt of Chitosan

2011 ◽  
Vol 175-176 ◽  
pp. 288-293 ◽  
Author(s):  
Yan Hua Lu ◽  
De Hong Cheng ◽  
Zhao Dan Yang
Keyword(s):  
Ammonium Salt ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Silk Fiber ◽  
Water Soluble ◽  
Chitosan Derivative ◽  
Sem Images ◽  
Antheraea Pernyi ◽  
Before And After ◽  
Ft Ir

In order to obtain a water soluble and reactive chitosan derivative, quaternary ammonium salt groups and acrylamidomethyl groups were introduced to chitosan by two steps. The chitosan derivative, reactive quaternary ammonium salt of chitosan, was then applied to Antheraea pernyi (A. pernyi) silk by padding and curing method. FT-IR, XRD and SEM were used to characterize the structure of A. pernyi silk before and after treatment. The peak in FT-IR spectra at 1480 cm-1 and 1650 cm-1 revealed the crosslinking reactions of A. pernyi silk fibroin and reactive quaternized chitosan. The XRD results indicated the crystallinity of the treated silk fiber increase a little in comparison with the untreated ones. SEM images clearly showed the reactive quaternary ammonium salt of chitosan attached on the surface of the treated A. pernyi silk fiber, while the surface of the untreated sample was relatively smooth. The thermal stability of the treated silk fiber was enhanced compared to the untreated one by DSC analysis. It was also found that the antibacterial activity of the treated A. pernyi silk fabric against E. coli was more than 99%.

scholarly journals Development of Polypropylene-Based Single-Polymer Composites With Blends of Amorphous Poly-Alpha-Olefin and Random Polypropylene Copolymer

Polymers ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1429 ◽  
Author(s):  
László József Varga ◽  
Tamás Bárány
Keyword(s):  
Tensile Properties ◽  
Polymer Composites ◽  
Matrix Material ◽  
Fiber Content ◽  
Woven Fabric ◽  
High Fiber ◽  
Alpha Olefin ◽  
The Matrix ◽  
Static Tensile ◽  
Falling Weight

We developed polypropylene-based single-polymer composites (PP-SPC) with blends of amorphous poly-alpha-olefin (APAO) and random polypropylene copolymer (rPP) as matrix material and polypropylene (PP) woven fabric as reinforcement. Our goal was to utilize the lower melting temperature of APAO/rPP blends to increase the consolidation of the composites and decrease the heat load of the PP reinforcement. We produced the composites by film-stacking at 160 °C, and characterized the composites with density, peel, static tensile and dynamic falling weight impact tests, and by scanning electron microscopy. The results indicate that consolidation can be enhanced by increasing the APAO content of the matrix. We found that the APAO content of 50% is optimal for tensile properties. With increasing APAO content, the perforation energy decreased, but even the well-consolidated composites showed very high perforation energy. In the case of a pure APAO matrix, fiber content can be increased up to 80 wt% without a severe loss of consolidation, resulting in good tensile properties. The PP-SPCs developed possessed excellent mechanical properties, and well-consolidated composites can be produced with APAO/rPP blends as a matrix with high fiber content.

Development of 200 kV Scanning-Transmission Electron Microscope

1974 ◽  
Vol 32 ◽  
pp. 410-411
Author(s):  
H. Koike ◽  
S. Sakurai ◽  
K. Ueno ◽  
M. Watanabe
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Scanning Transmission Electron Microscope ◽  
The Other ◽  
Morphological Observation ◽  
Magnetic Domains ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Backscattered Electron ◽  
Increasing Demand

In recent years, there has been increasing demand for higher voltage SEMs, in the field of surface observation, especially that of magnetic domains, dislocations, and electron channeling patterns by backscattered electron microscopy. On the other hand, the resolution of the CTEM has now reached 1 ∼ 2Å, and several reports have recently been made on the observation of atom images, indicating that the ultimate goal of morphological observation has beem nearly achieved.

Fasciaton of Pectate Elementary Fibrils

1973 ◽  
Vol 31 ◽  
pp. 60-61
Author(s):  
George F. Leeper
Keyword(s):  
Acid Treatment ◽  
Carbon Film ◽  
Final Concentration ◽  
Cellulose Microfibrils ◽  
Pectic Acid ◽  
Elementary Fibrils

Polysaccharide elementary fibrils are usually fasciated into microfibrils of from one hundred to a few hundred Angstroms wide. Cellulose microfibrils when subjected to acid treatment dissociate into component elementary fibrils. For pectic acid it was observed that variations in pH could cause a change in the fasciation of the elementary fibrils.Solutions of purified pectic acid and sodium phosphotungtate were adjusted to various pH levels with NaOH or HCl and diluted to give a final concentration of 0.5 and 1% for the polysaccharide and negative stains respectively. Micrographs were made of the samples after drying on a carbon film covered grid. The average number of elementary fibrils was determined by counting the number of elementary fibrils in each fascicle intersected by lines drawn across the micrograph.

Polishing process effect on the image of dispersed precipitates

1984 ◽  
Vol 42 ◽  
pp. 534-535
Author(s):  
C.T. Hu ◽  
C.W. Allen
Keyword(s):  
Matrix Material ◽  
Specimen Preparation ◽  
Second Phase ◽  
Precipitate Particle ◽  
Polishing Process ◽  
Second Phase Particles ◽  
The Matrix ◽  
Surface Profiles ◽  
Thinning Process

One important problem in determination of precipitate particle size is the effect of preferential thinning during TEM specimen preparation. Figure 1a schematically represents the original polydispersed Ni3Al precipitates in the Ni rich matrix. The three possible type surface profiles of TEM specimens, which result after electrolytic thinning process are illustrated in Figure 1b. c. & d. These various surface profiles could be produced by using different polishing electrolytes and conditions (i.e. temperature and electric current). The matrix-preferential-etching process causes the matrix material to be attacked much more rapidly than the second phase particles. Figure 1b indicated the result. The nonpreferential and precipitate-preferential-etching results are shown in Figures 1c and 1d respectively.

Alignment of small He-Bubbles during in situ deformation of Al-foils

1978 ◽  
Vol 36 (1) ◽  
pp. 396-397
Author(s):  
E. Ruedl ◽  
P. Schiller
Keyword(s):  
Fusion Reactor ◽  
Matrix Material ◽  
Fusion Reactors ◽  
First Wall ◽  
Potential Matrix ◽  
In Situ Deformation ◽  
Α Particles ◽  
Metal Aluminium

The low Z metal aluminium is a potential matrix material for the first wall in fusion reactors. A drawback in the application of A1 is the rel= atively high amount of He produced in it under fusion reactor conditions. Knowledge about the behaviour of He during irradiation and deformation in Al, especially near the surface, is therefore important.Using the TEM we have studied Al disks of 3 mm diameter and 0.2 mm thickness, which were perforated at the centre by double jet polishing. These disks were bombarded at∽200°C to various doses with α-particles, impinging at any angle and energy up to 1.5 MeV at both surfaces. The details of the irradiations are described in Ref.1. Subsequent observation indicated that in such specimens uniformly distributed He-bubbles are formed near the surface in a layer several μm thick (Fig.1).After bombardment the disks were deformed at 20°C during observation by means of a tensile device in a Philips EM 300 microscope.

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