scholarly journals Kenaf Bast Fibers—Part II: Inorganic Nanoparticle Impregnation for Polymer Composites

2011 ◽  
Vol 2011 ◽  
pp. 1-7 ◽  
Author(s):  
Jinshu Shi ◽  
Sheldon Q. Shi ◽  
H. Michael Barnes ◽  
Mark F. Horstemeyer ◽  
Ge Wang
Keyword(s):  
Tensile Strength ◽  
Polymer Composites ◽  
Tensile Modulus ◽  
Fiber Surface ◽  
Bast Fibers ◽  
Inorganic Nanoparticle ◽  
The Individual ◽  
Kenaf Fibers ◽  
Kenaf Bast Fibers ◽  
Kenaf Bast

The objective of this study was to investigate an inorganic nanoparticle impregnation (INI) technique to improve the compatibility between kenaf bast fibers and polyolefin matrices. The Scanning Electron Microscopy (SEM) was used to examine the surface morphology of the INI-treated fibers showing that the CaCO3nanoparticle crystals grew onto the fiber surface. Energy-dispersive X-ray spectroscopy (EDS) was used to verify the CaCO3nanoparticle deposits on the fiber surface. The tension tests of the individual fiber were conducted, and the results showed that the tensile strength of the fibers increased significantly (more than 20%) after the INI treatments. Polymer composites were fabricated using the INI-treated fiber as reinforcement and polypropylene (PP) as the matrix. The results showed that the INI treatments improved the compatibility between kenaf fibers and PP matrix. The tensile modulus and tensile strength of the composites reinforced with INI-treated fibers increased by 25.9% and 10.4%, respectively, compared to those reinforced with untreated kenaf fibers.

scholarly journals 112 Tensile Strength Properties of Kenaf Bast Fibers

2006 ◽  
Vol 2006.42 (0) ◽  
pp. 23-24
Author(s):  
Shinji OCHI ◽  
Hiroaki KAWASOKO ◽  
Jun TANEICHI ◽  
Hidetomo NISHIMURA
Keyword(s):  
Tensile Strength ◽  
Strength Properties ◽  
Bast Fibers ◽  
Kenaf Bast Fibers ◽  
Kenaf Bast

scholarly journals Estimation of the Effects of the Cross-Head Speed and Temperature on the Mechanical Strength of Kenaf Bast Fibers Using Weibull and Monte-Carlo Statistics

Fibers ◽  
2019 ◽  
Vol 7 (10) ◽  
pp. 89
Author(s):  
Ntenga ◽  
SAÏDJO ◽  
Beda ◽  
Béakou
Keyword(s):  
Tensile Strength ◽  
Monte Carlo ◽  
Mechanical Characteristics ◽  
Mechanical Performance ◽  
Plant Fibers ◽  
Temperature Levels ◽  
Experimental Values ◽  
Kenaf Fibers ◽  
Kenaf Bast Fibers ◽  
Kenaf Bast

Methods used by different researchers to evaluate plant fibers’ (PFs) mechanical performance, show great variance in results. In this work, 320 single kenaf fibers of gage lengths 10 and 20 mm were tensile-tested using four speed levels (0.05; 0.5; 1 and 5 mm·min−1). Sixty-three other specimens were also tested under three temperature levels (50, 100, and 150 °C). Mechanical characteristics, namely Young’s modulus, tensile strength, and failure strain were determined. Estimation of the dispersion on the data was performed using Weibull and Monte-Carlo statistics. Results showed a low scatter for cross-head speeds of 0.05, 0.5, and 1 mm·min−1, compared to 5 mm·min−1 for the two gage lengths used. Monte-Carlo average failure strength values were found to be close to the experimental values. A drastic drop in the tensile strength was observed for the temperature of 150 °C for varying hold times. The reported findings are likely to be used in the elaboration of a tensile test standard on PFs.

Tensile Strength of Surface Treated PBO Fiber

2015 ◽  
Vol 815 ◽  
pp. 622-628 ◽  
Author(s):  
Gang Shi ◽  
Su Ju ◽  
Chun Fang Huang ◽  
Da Zhi Jiang ◽  
Jian Wei Zhang
Keyword(s):  
Tensile Strength ◽  
High Performance ◽  
Fiber Surface ◽  
Interface Energy ◽  
Plasma Modification ◽  
Interface Properties ◽  
Weibull Analysis ◽  
Combined Treatments ◽  
Pbo Fiber ◽  
The Individual

Poly p-phenylene benzobisoxazole (PBO) fiber is a kind of organic fiber with high performance, but the properties of the interface between PBO fiber and resin are poor, which limit its application in the field of composite materials. Therefore, the surface modification methods were employed to enhance the interface properties, which could damage the fiber. This article assessed the influence of plasma modification, γ-ray irradiation, coupling agent, acid treatment and combined treatments on the strength of PBO fiber filament, and investigated its tensile strength with Weibull analysis. Through observation of fiber surface by SEM，it can be found that some combined treatments caused less damage to PBO fiber compared to the individual treatments. This indicates that if combining the different treatments appropriately, the interface energy of PBO fiber will increase, with the excellent mechanical properties well retained

Physical, Mechanical and Morphological Studies on Bio-composite Mixture of Oil Palm Frond and Kenaf Bast Fibers

2015 ◽  
Vol 11 (1-3) ◽  
pp. 22-30 ◽  
Author(s):  
Razak Wahab ◽  
Hashim W. Samsi ◽  
Mohd Tamizi Mustafa ◽  
Mazlan Mohamed ◽  
Mohd Sukhairi Mat Rasat ◽  
...  
Keyword(s):  
Oil Palm ◽  
Bast Fibers ◽  
Morphological Studies ◽  
Oil Palm Frond ◽  
Composite Mixture ◽  
Kenaf Bast Fibers ◽  
Kenaf Bast ◽  
Palm Frond

scholarly journals A chemical process for preparing cellulosic fibers hierarchically from kenaf bast fibers

BioResources ◽  
2011 ◽  
Vol 6 (1) ◽  
pp. 879-890 ◽  
Author(s):  
Jinshu Shi ◽  
Sheldon Q. Shi ◽  
H. Michael Barnes ◽  
Charles U. Pittman
Keyword(s):  
Electron Microscopy ◽  
Chemical Process ◽  
Chemical Components ◽  
Bast Fibers ◽  
Cellulosic Fibers ◽  
Pure Cellulose ◽  
Aspect Ratios ◽  
Macro Scale ◽  
Kenaf Bast Fibers ◽  
Kenaf Bast

The objective of this research was to evaluate an all-chemical process to prepare nano-scale to macro-scale cellulosic fibers from kenaf bast fibers, for polymer composite reinforcement. The procedure used in this all-chemical process included alkaline retting to obtain single cellulosic retted fiber, bleaching treatment to obtain delignified bleached fiber, and acidic hydrolysis to obtain both pure-cellulose microfiber and cellulose nanowhisker (CNW). At each step of this chemical process, the resultant fibers were characterized for crystallinity using X-ray diffraction (XRD), for functional groups using the Fourier Transform Infrared spectroscopy (FTIR), and for surface morphology using both the scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The chemical components of the different scale fibers were analyzed. Based on the raw kenaf bast fibers, the yields of retted fibers and bleached fibers were 44.6% and 41.4%. The yield of the pure cellulose microfibers was 26.3%. The yield of CNWs was 10.4%, where about 22.6% α-cellulose had been converted into CNWs. The fiber crystallinity increased as the scale of the fiber decreased, from 49.9% (retted single fibers) to 83.9% (CNWs). The CNWs had fiber lengths of 100 nm to 1400 nm, diameters of 7 to 84 nm, and aspect ratios of 10 to 50. The incorporation of 9% (wt%) CNWs in polyvinyl alcohol (PVA) composites increased the tensile strength by 46%.

Transverse and Longitudinal Flexural Properties of Untreated and Maleic Anhydride Treated Kenaf Bast Fiber Reinforced Unsaturated Polyester Composites

2016 ◽  
Vol 700 ◽  
pp. 93-101
Author(s):  
S.F. Zhafer ◽  
A.R. Rozyanty ◽  
S.B.S. Shahnaz ◽  
Luqman Musa ◽  
A. Zuliahani
Keyword(s):  
Maleic Anhydride ◽  
Flexural Strength ◽  
Unsaturated Polyester ◽  
Flexural Properties ◽  
Bast Fiber ◽  
Bast Fibers ◽  
Polyester Composites ◽  
Kenaf Bast Fibers ◽  
Kenaf Bast ◽  
Kenaf Bast Fiber

Kenaf bast fibers were prepared into two types as untreated and maleic anhydride (MA) treated. Unsaturated polyester (UPE) resin was used as matrix and applied onto the kenaf bast fibers using hand lay-up method. Transverse and longitudinal flexural properties of unidirectional long kenaf bast fiber reinforced unsaturated polyester composites were performed and the effect of fiber modification and loading were studied. It is found that the transverse flexural strength of both types of composites decreases with the increasing of kenaf loading. Contrary, longitudinal flexural strength of both composites increases with the increasing of kenaf loading. Improved transverse and longitudinal flexural properties are shown by MA treatment of kenaf bast fiber. The interactions between fiber and matrix of fractured flexural surface were also observed by scanning electron microscope (SEM).

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