scholarly journals Effect of Fiber Content and Screw Speed on Mechanical Characterization of Sisal Fiber Reinforced Polypropylene Composites

2019 ◽  
Vol 8 (6S4) ◽  
pp. 9-13
Keyword(s):  
Fiber Content ◽  
Sisal Fiber ◽  
Screw Speed ◽  
Polypropylene Composites ◽  
Plastic Composite ◽  
The Matrix ◽  
High Interaction ◽  
High Level ◽  
The Impact ◽  
Mechanical Extraction

The present paper researches the impact of differing fiber content and speed on tensile flexural, HDT and effect properties of characteristic fiber (sisal) fortified polypropylene composites (NF). The support fiber (Sisal-Fiber) was gathered from the foliage of locally accessible tree through the procedure of water retting and mechanical extraction. Poor adhesion among fiber and matrix is regularly experienced issue in characteristic fiber-strengthened composites and to conquer this issue, physical and substance medicines were performed for surface adjustment of fibers. The expansion of compatibilizer to the matrix like, is enhanced the adhesion attributes of the fiber. The outcomes it proposes that the high level of fibers combined with a higher screw speed improves the mechanical properties of the Sisal Fiber-Polypropylene plastic composite due to a high interaction between the fiber and the matrix and an even distribution of the fiber in the matrix.

Preparation of Polypropylene Composites with High Levels of Coir Short Fiber for Use in Products by Injection

2015 ◽  
Vol 668 ◽  
pp. 28-38 ◽  
Author(s):  
Claudio Roberto Passatore ◽  
Alcides Lopes Leão ◽  
Derval dos Santos Rosa
Keyword(s):  
Sessile Drop ◽  
Short Fiber ◽  
Polymeric Matrix ◽  
Coir Fiber ◽  
Polypropylene Composites ◽  
The Matrix ◽  
Hydrophilic Character ◽  
High Level ◽  
Thermal Stability Of ◽  
Vegetable Fiber

The main objective of this investigation was to study the properties of composites of polypropylene (PP) containing different proportions (20, 40 and 60% wt%) of coir short fiber (natural vegetable fiber) without treatment of fibers, for use in products by injection with applications in the automotive industries, construction and other segments. Samples were prepared in a only stage using a high intensity thermokinetic mixer (K-Mixer). Additives were used in the mass fraction of 3 wt% compatibilizer (PP-g-MA), 2.2 wt% processing additive and 0.12 wt% thermal antioxidant. The composites were characterized by tensile test according to ASTM D638-10. The surface properties of the polymeric matrix with additives were studied by determining the contact angle (CA) in a sessile drop tensiometer and the carbonyl index (CI) by Fourier-transform infrared spectroscopy (FTIR). Thermal properties of the PP and the composition were evaluated by thermogravimetric test, and the interface of the fiber and the matrix in the composites were evaluated using images from scanning electron microscopy (SEM). The CA analysis showed that the PP matrix with additives has become less hydrophobic and the FTIR and the CI that there was a better stabilization of the PP with additives. There was an increase in thermal stability of the composites for all fiber content, which was up to 15 °C above PP for coir fiber composites. In the Young's modulus values showed that the inclusion of fibers reinforced the polymeric matrix and increased the stiffness of the composites, especially in composites containing 60% (wt%) in which the values were ~1.7 times greater than the polypropylene. Images of micrographs showed the interaction of the fiber in the matrix and that despite the hydrophilic character of the fibers and hydrophobic character of the PP, the composites showed non-homogeneous interfaces. These findings confirm the feasibility of using high level of coir fiber in polypropylene composites even without pretreatment of the fibers and the preparation of samples by injection.

Experimental Investigation of the Thermoplastic Tapioca Starch/Sisal Fiber Composites

2011 ◽  
Vol 221 ◽  
pp. 586-591 ◽  
Author(s):  
Xian Zhong Mo ◽  
Yu Xiang Zhong ◽  
Jin Ying Pang ◽  
Ting Guo ◽  
Xiang Qi
Keyword(s):  
Fiber Composites ◽  
Fiber Content ◽  
Sisal Fiber ◽  
Cellulose Crystallinity ◽  
Mass Ratio ◽  
Elongation At Break ◽  
Tapioca Starch ◽  
X Ray ◽  
The Matrix ◽  
Thermal Stability Of

As the matrix of sisal fiber, thermoplastic tapioca starch(TPS) was prepared with the mixed plasticizer, formamide and urea (mass ratio 2:1). X-ray diffractograms showed that with increasing fiber content(below 30phr), cellulose crystallinity at 22.5° gradually got stronger but starch crystallinity at 15.3°, 17.1°, 18.2°, 23.5° already disappeared, showed that this matrix still restrained the retrogradation of starch. SEM micrographs showed good dispersion and adhesion between starch and fiber. Studies in the dependence of mechanical properties of reinforced TPS on the fiber content from 0 to 30phr, the initial tensile strength was quadrupled up to the maximum 21.83MPa at 20phr fiber content, while the elongation at break was reduced from 72% to 0.44%. TG mass loss curves showed that thermal stability of this composites had great improved under 500°C.

Study on Ramie Fiber Reinforced Polypropylene Composites (RF-PP) and its Mechanical Properties

2008 ◽  
Vol 41-42 ◽  
pp. 313-316 ◽  
Author(s):  
Li Ping He ◽  
Yong Tian ◽  
Lu Lin Wang
Keyword(s):  
Mechanical Properties ◽  
Fiber Length ◽  
Fiber Content ◽  
Ramie Fiber ◽  
Fiber Reinforced ◽  
Polypropylene Composites ◽  
Environmental Friendly ◽  
Pp Composites ◽  
Pre Treatment ◽  
The Impact

Natural fiber reinforced polypropylene composites (NF/PP) have attracted a lot of attention because of their light weight, good mechanical properties, recyclable and environmental friendly features. This work has successfully fabricated ramie fiber reinforced polypropylene composites (RF/PP) with a hybrid method of melt-blending and injection molding. Different RF/PP eco-materials have been fabricated by varying the fiber length, fiber content and way of fiber pre-treatment. This paper studied the mechanical properties of the fabricated RF/PP composites in depth by investigating the mechanical behaviors of RF/PP and microstructures of the ruptured surfaces. The results show that the increases of fiber length and fiber content can improve the tensile strength, flexural strength and compression strength apparently, but result in negative influences on the impact strength and elongation behaviors of RF/PP composites. The optimal addition amount of ramie fiber is around 20 wt%. The pre-treatment of ramie fiber in 10%~15% NaOH is good to the mechanical properties of RF/PP. The fiber length can be varied in the range of 3-8 mm. It is expected that the fabricated RF/PP composites can be applied to automobile industry as environmental friendly eco-materials.

The Effect of Hyperdispersant on the Mechanical Properties and Morphology of Sisal Fiber/Polypropylene Composites

2011 ◽  
Vol 250-253 ◽  
pp. 839-842
Author(s):  
Chun He Yu ◽  
Shao Rong Lu ◽  
Zhi You Yang ◽  
Kuo Liu ◽  
Xin Fan
Keyword(s):  
Mechanical Properties ◽  
Impact Strength ◽  
Flexural Strength ◽  
Water Solubility ◽  
Experimental Results ◽  
Sisal Fiber ◽  
Polypropylene Composites ◽  
Pp Composites ◽  
Flexible Segment ◽  
The Impact

In order to enhance the interfacial interactions between the sisal fiber (SF) and the polypropylene (PP) matrix, a water-solubility hyperdispersant which has amphipathic structure and flexible segment was used. Experimental results revealed that when the content of hyperdispersant is 5 percent, the impact strength of the composites was 27.4 kJ·m-2 and the flexural strength of SF/PP composites was 40.1 MPa, which was 64 and 34 wt% higher than that of unmodified systems, respectively. Meanwhile, the crystallinity of the composites also leads to an increase.

Effects of Weave Type and Fiber Content on Physical Properties of Sisal Fiber/Epoxy Composites

2010 ◽  
Vol 123-125 ◽  
pp. 1139-1142 ◽  
Author(s):  
Sawitri Srisuwan ◽  
Pranee Chumsamrong
Keyword(s):  
Impact Strength ◽  
Physical Properties ◽  
Epoxy Resin ◽  
Flexural Modulus ◽  
Fiber Content ◽  
Epoxy Composites ◽  
Sisal Fiber ◽  
Pure Epoxy ◽  
Sisal Fibers ◽  
The Impact

In this study, the effects of weave type and fiber content on the physical properties of woven sisal fiber/epoxy composites were investigated. Sisal fibers used in this work were obtained from Nakhon Ratchasima, Thailand. Both untreated and alkali-treated fibers were employed. The woven sisal fibers were manufactured by hand weaving process. The fiber content in sisal fiber/epoxy composites were 3 wt.%, 5 wt.% and 10 wt.%. The composites were cured at room temperatures. In order to determine mechanical properties of the composites, flexural and impact tests were applied. Flexural strength and flexural modulus of all composites were higher than those of pure epoxy resin and tended to increase with increasing fiber content. The impact strength of all composites was lower than that of pure epoxy resin. The composites containing 10 wt.% sisal fibers showed the highest impact strength. There was no definite influence of weave type on flexural properties of the composites. At 3 and 5 wt.% fiber, the composites containing plain weave fibers seemed to show a higher impact strength than the composites containing other weave types.

scholarly journals Bio-Based Polyurethane Composites and Hybrid Composites Containing a New Type of Bio-Polyol and Addition of Natural and Synthetic Fibers

Materials ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2028 ◽  
Author(s):  
Adam Olszewski ◽  
Paulina Kosmela ◽  
Aleksandra Mielewczyk-Gryń ◽  
Łukasz Piszczyk
Keyword(s):  
Hybrid Composites ◽  
Sem Analysis ◽  
Sisal Fiber ◽  
Synthetic Fibers ◽  
The Matrix ◽  
New Type ◽  
Liquefaction Process ◽  
Sisal Fibers ◽  
Polyurethane Composites ◽  
The Impact

This article describes how new bio-based polyol during the liquefaction process can be obtained. Selected polyol was tested in the production of polyurethane resins. Moreover, this research describes the process of manufacturing polyurethane materials and the impact of two different types of fibers—synthetic and natural (glass and sisal fibers)—on the properties of composites. The best properties were achieved at a reaction temperature of 150 °C and a time of 6 h. The hydroxyl number of bio-based polyol was 475 mg KOH/g. Composites were obtained by hot pressing for 15 min at 100 °C and under a pressure of 10 MPa. Conducted researches show the improvement of flexural strength, impact strength, hardness, an increase of storage modulus of obtained materials, and an increase of glass transition temperature of hard segments with an increasing amount of fibers. SEM analysis determined better adhesion of sisal fiber to the matrix and presence of cracks, holes, and voids inside the structure of composites.

Heading for greener pastures? Defining the foraging preferences of urban long-nosed bandicoots

2010 ◽  
Vol 58 (6) ◽  
pp. 341 ◽  
Author(s):  
Nelika K. Hughes ◽  
Peter B. Banks
Keyword(s):  
Urban Areas ◽  
Habitat Preferences ◽  
Home Ranges ◽  
Foraging Preferences ◽  
The Matrix ◽  
Peripheral Areas ◽  
Generalised Linear Modelling ◽  
High Level ◽  
The Impact ◽  
Artificial Watering

The impact of urbanisation is delayed for many species, as populations that manage to survive the initial loss of habitat gradually decline throughout the urban–bushland mosaic. Yet many species’ chances of persistence within urban areas can be increased through relatively simple management techniques, and an understanding of how remnant populations use the interface between urban and natural landscapes is therefore crucial to their long-term management. Here we examine the habitat preferences of a semi-urban population of long-nosed bandicoots (Perameles nasuta) that inhabits a matrix of urban open lawn and dense native heath macrohabitats. We radio-tracked animals in these two distinct macrohabitats and compared the microhabitat features between core and peripheral areas of home ranges. Core and peripheral areas did not differ in their characteristics for either macrohabitat; however, individuals showed a high level of fidelity to distinct foraging patches. We then related microhabitat features to an index of foraging activity using generalised linear modelling and found that diggings were more abundant in areas with moist, soft soils close to cover. Soil softness and moisture were experimentally increased via artificial watering on selected sites. After only 10 days there were significantly more diggings on watered than non-watered sites. Thus, bandicoots appear to be a matrix-sensitive species, using some open grass areas of the matrix but requiring the vegetation cover of remnant bush. We suggest, however, that artificial watering and additional cover may be one way to increase foraging opportunities to make this, and other semi-urban, populations matrix-occupying, and thus facilitate bandicoot persistence in the urban mosaic.

scholarly journals Flexural Performance of Sisal Fiber Reinforced Foamed Concrete under Static and Fatigue Loading

Materials ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3098
Author(s):  
Jun Huang ◽  
Guoxin Tian ◽  
Peiyan Huang ◽  
Zhanbiao Chen
Keyword(s):  
Mechanical Properties ◽  
Fatigue Life ◽  
Bending Strength ◽  
Fatigue Loading ◽  
Fiber Content ◽  
Sisal Fiber ◽  
Flexural Performance ◽  
Linear Relationships ◽  
The Matrix ◽  
Foamed Concrete

To improve the weak mechanical properties of the foamed concrete that resulted from a large number of pores, a plant fiber is used as fill with the matrix. In this study, five contents of sisal fiber are added into the foamed concrete to investigate the static and fatigue performance of composites. The static and fatigue experimental results show that the sisal fiber can improve the mechanical properties of the foamed concrete. When the content of sisal fiber is less than 0.15%, the higher the content of sisal fiber, the greater the bending strength and fatigue life of the foamed concrete. In contrast, if the sisal fiber content is larger than 0.15%, the bending strength and fatigue life decrease with the increasing fiber content. From the regression analyses, the results show that the double linear relationships exist not only between the sisal fiber content and the flexural strength, but also between the sisal fiber content and the fatigue life of the foamed concrete. In this study, the optimal content of sisal fiber mixed in the foamed concrete can be inferred to be 0.133%.

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