Random glass mat reinforced thermoplastic composites. Part IV: Characterization of the tensile strength

ABSTRACTPhysical properties and structural parameters have been measured for ropes of nylon 6 as a function of the number of use operations. The fractional content of the α crystal form, sound velocity, birefringence, tensile strength and length all increase systematically and significantly with increasing the number of use operations. The fractional content of the γ crystal form and fiber diameter decrease with use. These trends indicate that the measurement of such properties and structural parameters, especially the length, provide a possible basis for establishing a reliable, rapid, and convenient nondestructive characterization method to predict the remaining service life of nylon 6 ropes.

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Preparation and Characterization of β-glucosidase Films for Stabilization and Handling in Dry Configurations

Current Pharmaceutical Biotechnology ◽

10.2174/1389201020666191202145351 ◽

2020 ◽

Vol 21 (8) ◽

pp. 741-747

Author(s):

Liguang Zhang ◽

Yanan Shen ◽

Wenjing Lu ◽

Lengqiu Guo ◽

Min Xiang ◽

...

Keyword(s):

Tensile Strength ◽

Protein Function ◽

Protein Stabilization ◽

Functional Protein ◽

Elongation At Break ◽

Gelatin Films ◽

The Stability ◽

And Function ◽

General Method

Background: Although the stability of proteins is of significance to maintain protein function for therapeutical applications, this remains a challenge. Herein, a general method of preserving protein stability and function was developed using gelatin films. Method: Enzymes immobilized onto films composed of gelatin and Ethylene Glycol (EG) were developed to study their ability to stabilize proteins. As a model functional protein, β-glucosidase was selected. The tensile properties, microstructure, and crystallization behavior of the gelatin films were assessed. Result: Our results indicated that film configurations can preserve the activity of β-glucosidase under rigorous conditions (75% relative humidity and 37°C for 47 days). In both control films and films containing 1.8 % β-glucosidase, tensile strength increased with increased EG content, whilst the elongation at break increased initially, then decreased over time. The presence of β-glucosidase had a negligible influence on tensile strength and elongation at break. Scanning electron-microscopy (SEM) revealed that with increasing EG content or decreasing enzyme concentrations, a denser microstructure was observed. Conclusion: In conclusion, the dry film is a promising candidate to maintain protein stabilization and handling. The configuration is convenient and cheap, and thus applicable to protein storage and transportation processes in the future.

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Fabrication and Characterization of Biocomposite Using Grewia Optiva Fibre (i.e. Bhimal) Reinforced Polyvinyl Alcohol (PVA)

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1105.51 ◽

2015 ◽

Vol 1105 ◽

pp. 51-55 ◽

Cited By ~ 1

Author(s):

K.M. Gupta ◽

Kishor Kalauni

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Natural Fibre ◽

Fabrication Method ◽

View Point ◽

Engineering Material ◽

Fibre Composites ◽

Grewia Optiva ◽

Fabrication And Characterization

Bhimal fibres are quite a newer kind of bio-degradable fibres. They have never been heard before in literatures from the view point of their utility as engineering material. These fibres have been utilized for investigation of their properties. Characterization of this fibre is essential to determine its properties for further use as reinforcing fibre in polymeric, bio-degradable and other kinds of matrix. With this objective, the fabrication method and other mechanical properties of Bhimal-reinforced-PVA biocomposite have been discussed. The stress-strain curves and load-deflection characteristics are obtained. The tensile, compressive, flexure and impact strengths have been calculated. The results are shown in tables and graphs. The results obtained are compared with other existing natural fibre biocomposites. From the observations, it has been concluded that the tensile strength of Bhimal-reinforced-PVA biocomposite is higher than other natural fibre composites. Hence these can be used as reinforcement to produce much lighter weight biocomposites.

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Mechanical characterization of LM25 alloy matrix composite reinforced with boron carbide

Journal of Composite Materials ◽

10.1177/00219983211005513 ◽

2021 ◽

pp. 002199832110055

Author(s):

Zeeshan Ahmad ◽

Sabah Khan

Keyword(s):

Tensile Strength ◽

Boron Carbide ◽

Mechanical Characterization ◽

Stir Casting ◽

Surface Mapping ◽

Alloy Matrix ◽

Casting Technique ◽

The Matrix ◽

Carbide Particles

Alumnium alloy LM 25 based composites reinforced with boron carbide at different weight fractions of 4%, 8%, and 12% were fabricated by stir casting technique. The microstructures and morphology of the fabricated composites were studied by scanning electron microscopy and energy dispersive spectroscopy. Elemental mapping of all fabricated composites were done to demonstrate the elements present in the matrix and fabricated composites. The results of microstructural analyses reveal homogenous dispersion of reinforcement particles in the matrix with some little amount of clustering found in composites reinforced with 12% wt. of boron carbide. The mechanical characterization is done for both alloy LM 25 and all fabricated composites based on hardness and tensile strength. The hardness increased from 13.6% to 21.31% and tensile strength 6.4% to 22.8% as reinforcement percentage of boron carbide particles increased from 0% to 12% wt. A fractured surface mapping was also done for all composites.

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Characterization of a new natural fiber extracted from Corypha taliera fruit

Scientific Reports ◽

10.1038/s41598-021-87128-8 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Taslima Ahmed Tamanna ◽

Shah Alimuzzaman Belal ◽

Mohammad Abul Hasan Shibly ◽

Ayub Nabi Khan

Keyword(s):

Tensile Strength ◽

Natural Fiber ◽

Natural Fibers ◽

Morphological Characteristics ◽

Synthetic Fiber ◽

X Ray Diffraction ◽

Reinforced Composite ◽

Potential Alternative

AbstractThis study deals with the determination of new natural fibers extracted from the Corypha taliera fruit (CTF) and its characteristics were reported for the potential alternative of harmful synthetic fiber. The physical, chemical, mechanical, thermal, and morphological characteristics were investigated for CTF fibers. X-ray diffraction and chemical composition characterization ensured a higher amount of cellulose (55.1 wt%) content and crystallinity (62.5%) in the CTF fiber. The FTIR analysis ensured the different functional groups of cellulose, hemicellulose, and lignin present in the fiber. The Scherrer’s equation was used to determine crystallite size 1.45 nm. The mean diameter, specific density, and linear density of the CTF fiber were found (average) 131 μm, 0.86 g/cc, and 43 Tex, respectively. The maximum tensile strength was obtained 53.55 MPa for GL 20 mm and Young’s modulus 572.21 MPa for GL 30 mm. The required energy at break was recorded during the tensile strength experiment from the tensile strength tester and the average values for GL 20 mm and GL 30 mm are 0.05381 J and 0.08968 J, respectively. The thermal analysis ensured the thermal sustainability of CTF fiber up to 230 °C. Entirely the aforementioned outcomes ensured that the new CTF fiber is the expected reinforcement to the fiber-reinforced composite materials.

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Experimental characterization of tensile strength of steel and fibre rovings also under environmental conditioning

Composites Part B Engineering ◽

10.1016/j.compositesb.2021.108895 ◽

2021 ◽

pp. 108895

Author(s):

Giuseppe Maddaloni ◽

Eliana Parcesepe ◽

Annalisa Franco ◽

Antonio Bonati ◽

Antonio Occhiuzzi ◽

...

Keyword(s):

Tensile Strength ◽

Experimental Characterization ◽

Environmental Conditioning

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