Environmental Degradation Behavior of Kenaf Fiber Mat Composite

2014 ◽  
Author(s):  
Mengyuan Liao ◽  
Toshihiko Hojo ◽  
Guijun Xian ◽  
Yuqiu Yang ◽  
Hiroyuki Hamada
Keyword(s):  
Mechanical Properties ◽  
Weight Change ◽  
Fossil Fuels ◽  
Natural Fiber ◽  
Fiber Composite ◽  
Unsaturated Polyester ◽  
Extreme Temperature ◽  
Performance Ratio ◽  
Monsoon Climate ◽  
Kenaf Fiber

Nowadays “eco-design” is becoming a philosophy to guide next generation of materials and products as global environmental issue produced by fossil fuels and resource overusing. With an industrial increasing interest in sustainable, eco-efficient and green material’s application, natural fiber in polymer composite is guided to develop rapidly. As well know that, natural fibers possess advantages over synthetic or manmade fibers due to its abundance, biodegradability, CO2 neutrality, excellent price/performance ratio and comparable specific strength properties. However, outdoor applications of natural fiber composite are still constrained and raising concerns in terms of their durability, including UV resistance, moisture resistance and extreme temperature withstand and dimensional stability. Continuing with previous research on kenaf non-woven reinforced unsaturated polyester composites three months degradation performance, in order to get a good knowledge of its degradation process/cycle in complicated outdoor environments, longer degradation periods up to 6 months and 12 months in this paper were added for further investigation and comparison. Initially, three sets of kenaf fiber mat composite samples were located in extreme cold temperature (Harbin), mild sea climate Kyoto (Japan), subtropical marine monsoon climate Shanghai (China) and tropical monsoon climate Zaria (Nigeria) respectively from the same starting time until predetermined ageing periods, afterwards weight change and mechanical behavior in terms of tensile, flexural, impact and fracture toughness were measured instrumentally for ageing effect discussion and comparison. As expected, the aged specimens in those different positions all showed the dropped mechanical properties with increasing ageing periods. Furthermore, the trend of degradation in various mechanical parameters was established, which demonstrated weight loss made more serious effect on aged sample’s mechanical properties’ reduction than water absorption behavior. In a word, dropped mechanical properties of the degraded composites accompanied with weight change behavior were clarified, in which degradation phenomenon of embrittled the matrix polymer, deteriorated reinforced fiber and interfacial properties were detected.

scholarly journals Mechanical Properties of Banana Fabric and Kenaf Fiber Reinforced Epoxy Composites: Effect of Treatment and Hybridization

2019 ◽  
Vol 8 (10) ◽  
pp. 1870-1874
Keyword(s):  
Mechanical Properties ◽  
Natural Fiber ◽  
Fiber Composite ◽  
Fiber Reinforced Composites ◽  
Synthetic Fiber ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Kenaf Fiber ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite

Nowadays, Natural Fiber Reinforced composites (NFCs) are emerging to be a good substitute for synthetic fiber reinforced composites as NFCs have many advantages such as low density, high specific strength, recyclability, low cost and good sound abatement quality etc. Among all types of NFCs, a vast study has been done on banana fiber and kenaf fiber reinforced composite. However, only limited work has been done on the banana fabric, kenaf fiber reinforced composite and the effect of their hybridization on mechanical properties. In this paper, an attempt has been made to study the mechanical properties of the banana fabric, kenaf fiber and hybrid banana fabric/kenaf fiber reinforced composites. Effect of alkali treatment on kenaf fiber reinforced composite is discussed in the paper. For the present work, plain-woven banana fabric and randomly oriented kenaf fiber are used as reinforcement while the epoxy resin is used as a matrix. samples are fabricated using hand lay-up and vacuum bagging method. Curing is done at ambient temperature (250C-300C) for 48h. Tensile, impact and hardness test has been performed on a specimen according to ASTM standards. Improvement in mechanical properties is observed after alkali (6% NaOH) treatment on kenaf fiber reinforced composite. Tensile testing behavior of randomly oriented kenaf fiber composite has been studied using Finite element method and results are compared with experimental investigations. This topic present big potential because it seeks to find solution for sustainable development with environmental concerns.

Study on the Effect of Bleaching Treatment on the Mechanical Properties of Kenaf Fibers

2020 ◽  
Vol 1000 ◽  
pp. 278-284
Author(s):  
Yuli Amalia Husnil ◽  
Evana Yuanita ◽  
Nurfitri Ramadhani ◽  
Mochamad Chalid
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Mechanical Strength ◽  
Natural Fiber ◽  
Fiber Composite ◽  
Annual Growth Rate ◽  
Kenaf Fiber ◽  
Market Growth ◽  
Compound Annual Growth Rate ◽  
Bleaching Treatment

Automotive industries are trying to reduce the weight of cars by replacing parts that are made of steel and aluminum with lighter material but equally strong. It is an emerging trend in these industries to utilize polypropylene reinforced with natural fiber as the alternative lightweight material. PP-natural fiber composite is projected to have market growth with compound annual growth rate (CAGR) of 9.5% within 2018-2025. Blending PP with natural fiber is a challenging process considering these two materials are not compatible enough to produce composite with desired mechanical properties. Prior treatment to the fiber is required to improve its compatibility with PP with cautionary that it does not degrading the mechanical strength of the fiber. The aim of this work was to study the effect of chemical treatment on Kenaf fiber to the tensile strength of the fiber. Kenaf fiber was bleached with NaClO solution at various concentration (1-10% v/w), temperature (25-55°C), and duration (1-6 hours). The effect of bleaching treatment to the chemical structure and the tensile strength of the fiber was analyzed using FTIR and UTM respectively. This study showed that the fiber with highest tensile strength was the one that treated with NaClO solution with concentration 1% v/w, at 25°C for 1 hour. This treatment removed impurities for the surface and reduced some amorphous part of the fiber. However further increasing NaClO concentration, mixing temperature and duration will damage the cellulose chain in Kenaf fiber which will decrease the mechanical strength of the fiber.

scholarly journals Effects of High-Temperature Exposure on the Mechanical Properties of Kenaf Composites

Polymers ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 1643 ◽  
Author(s):  
Nabilah Afiqah Mohd Radzuan ◽  
Dulina Tholibon ◽  
Abu Bakar Sulong ◽  
Norhamidi Muhamad ◽  
Che Hassan Che Haron
Keyword(s):  
Mechanical Properties ◽  
Natural Fiber ◽  
Molding Process ◽  
Kenaf Fiber ◽  
Polypropylene Composites ◽  
Safety Issues ◽  
Automotive Parts ◽  
Kenaf Composites ◽  
Temperature Exposure ◽  
Kenaf Fibers

Automotive parts, including dashboards and trunk covers, are now fabricated through a compression-molding process in order to produce lightweight products and optimize fuel consumption. However, their mechanical strength is not compromised to avoid safety issues. Therefore, this study investigates kenaf-fiber-reinforced polypropylene composites using a simple combing approach to unidirectionally align kenaf fibers at 0°. The kenaf composite was found to withstand a maximal temperature of 120 °C. The tensile and flexural strengths of the aligned kenaf composites (50 and 90 MPa, respectively) were three times higher than those of the commercialized Product T (between 39 and 30.5 MPa, respectively) at a temperature range of 90 to 120 °C. These findings clearly showed that the mechanical properties of aligned kenaf fibers fabricated through the combing technique were able to withstand high operating temperatures (120 °C), and could be used as an alternative to other commercial natural-fiber products.

scholarly journals Mechanical properties of kenaf fibrous pulverized fuel ash concrete

2018 ◽  
Vol 250 ◽  
pp. 05007
Author(s):  
Norazura Mizal Azzmi ◽  
Jamaludin Mohamad Yatim ◽  
Hazlan Abdul Hamid ◽  
Azmahani Abdul Aziz ◽  
Adole Michael Adole
Keyword(s):  
Mechanical Properties ◽  
Natural Fiber ◽  
Coal Ash ◽  
Physical And Mechanical Properties ◽  
Short Fiber ◽  
Pozzolanic Reaction ◽  
Strength Development ◽  
Kenaf Fiber ◽  
Fuel Ash ◽  
Pulverized Fuel

The main objective of the experimental work is to identify the mechanical properties of Kenaf Fiber incorporate with Ordinary Portland Cement (OPC) and Pulverised Fuel Ash (PFA) in the mix proportions of concrete. Kenaf Fibrous Concrete (KFC) and Kenaf Fibrous Pulverised Fuel Ash Concrete (KFPC) will be measured on physical and mechanical properties in order to investigate the suitability of this natural fiber as a composite material. A comparison of properties between these two composites will determine the density, workability, compressive, tensile, and flexural strength of the concrete. Eight different mixes with varying percentage of Kenaf fiber were prepared with 30N/mm2 strength at 28days ,56 days and 90 days. Short fiber with 25mm and 50mm length were randomly distribute in composite to enhance the tensile and durability. PFA was obtained by the process of burning in the Power Station Coal Ash at Tanjung Bin, Johor. The unburning powder from the process is called as a PFA generally suitable for cement replacement in the concrete mix. The pozzolanic reaction will improve the adhesion of cement gel, hence increased the properties of concrete in a long-term strength development. The result shows that the inclusion of Kenaf fiber improve tensile strength of composite, furthermore the 25% PFA mix increase the durability of concrete.

scholarly journals Mechanical properties of coconut trunk particle/polyester composite based on alkali treatment

2020 ◽  
Vol 29 ◽  
pp. 2633366X2093589
Author(s):  
Van-Tho Hoang ◽  
Thanh-Nhut Pham ◽  
Young-Jin Yum
Keyword(s):  
Mechanical Properties ◽  
Surface Modification ◽  
Polyester Resin ◽  
Natural Fiber ◽  
Alkali Treatment ◽  
Unsaturated Polyester ◽  
Test Results ◽  
Coconut Tree ◽  
Lignocellulosic Fiber ◽  
Polyester Composite

Coir is a well-known natural fiber extracted from the husk of a coconut tree. In polymer composite materials, the ultimate performance of coir has been shown using surface modification methods. Among them, sodium hydroxide (NaOH) is a comparative and efficient solution used for surface treatment of lignocellulosic fiber. In contrast to coir, coconut timber, a hardwood that dominates the weight of the coconut tree, has not been appropriately considered for use in polymer composites. Therefore, in this article, coconut trunk particle/unsaturated polyester resin composites were experimentally investigated. As a pioneering study, a large range of NaOH concentrations from 2 wt% to 10 wt% (with an interval of 2 wt%) was utilized to treat the surface of the filler. Finally, 4 wt% alkali solution was found as the best content for surface modification based on the mechanical properties of the composite, including those determined by tensile, flexural, and impact test results.

scholarly journals Effect of Environmental Degradation on Mechanical Properties of Kenaf/Polyethylene Terephthalate Fiber Reinforced Polyoxymethylene Hybrid Composite

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Mohamad Zaki Abdullah ◽  
Yakubu Dan-mallam ◽  
Puteri Sri Melor Megat Yusoff
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Environmental Degradation ◽  
Hybrid Composite ◽  
Fiber Composite ◽  
Accelerated Weathering ◽  
Fiber Reinforced ◽  
Kenaf Fiber ◽  
Pet Fibers ◽  
Outdoor Application

The main objective of this research is to investigate the effect of environmental degradation on the mechanical properties of kenaf/PET fiber reinforced POM hybrid composite. Kenaf and PET fibers were selected as reinforcements because of their good mechanical properties and resistance to photodegradation. The test samples were produced by compression molding. The samples were exposed to moisture, water spray, and ultraviolet penetration in an accelerated weathering chamber for 672 hours. The tensile strength of the long fiber POM/kenaf (80/20) composite dropped by 50% from 127.8 to 64.8 MPa while that of the hybrid composite dropped by only 2% from 73.8 to 72.5 MPa. This suggests that the hybrid composite had higher resistance to tensile strength than the POM/kenaf composite. Similarly, the results of flexural and impact strengths also revealed that the hybrid composite showed less degradation compared to the kenaf fiber composite. The results of the investigation revealed that the hybrid composite had better retention of mechanical properties than that of the kenaf fiber composites and may be suitable for outdoor application in the automotive industry.

A Study of the Effects of Ingredients to the Mechanical Properties of Natural Fiber Composites (NFC)

2013 ◽  
Vol 689 ◽  
pp. 382-388
Author(s):  
Ju Seok Oh ◽  
Song Woo Nam ◽  
Sun Woong Choi
Keyword(s):  
Mechanical Properties ◽  
Natural Fiber ◽  
Wood Flour ◽  
Fiber Composite ◽  
Flexural Modulus ◽  
Construction Materials ◽  
Fiber Composites ◽  
Polymer Processing ◽  
Base Resin ◽  
Natural Fiber Composite

The importance of NFC (Natural Fiber Composite) as construction materials is widely accepted all over the world. But it seems that NFC manufacturers have complicated information about the effect of ingredients to their products. Hence systematic study for optimum composition of NFC is needed. This study is aimed to elucidate the effect of ingredients to the mechanical properties of NFC. We devised design of experiments to draw a firm conclusion. The experiments were conducted with polymer processing machines which are widely accepted in polymer processing industries. The result of ANOVA analysis showed that the most important ingredient of NFC is wood flour. And as the length of wood flour increases, the mechanical properties are enhanced. Contrary to wood flour, base resin has little effect to the mechanical properties of NFC. The effect of coupling agent to flexural modulus is not ignorable, but the effect to flexural strength is different from that of flexural modulus.

Environmental Durability of Natural Fiber Reinforced Unsaturated Polyester Composite

2013 ◽  
Author(s):  
Mengyuan Liao ◽  
Umaru Semo Ishiaku ◽  
Zainal Arifin Mohd Ishak ◽  
Guijun Xian ◽  
Hiroyuki Hamada
Keyword(s):  
Mechanical Properties ◽  
Environmental Degradation ◽  
Natural Fiber ◽  
Unsaturated Polyester ◽  
Physical And Mechanical Properties ◽  
Vacuum Oven ◽  
Polyester Composite ◽  
Environmental Durability ◽  
Natural Climate ◽  
Automotive Interior

With an industrial increasing interest in sustainable, eco-efficient and green material’s application, natural fiber in polymer composite is guided to develop rapidly, especially kenaf nonwovens in making automotive interior trim parts with its comparative excellent strength and renewability. The objectives of this research are to investigate the environmental degradation behavior on the physical and mechanical properties of kenaf/unsaturated polyester nonwoven composites (KUNC) with special reference to the influence of different geographic natural climate ageing conditions. KUNC was prepared with needle-punched kenaf’s impregnation into unsaturated polyester resin assisted with vacuum oven following by hand lay-up molding. Natural environmental degradation was performed on KUNC by exposing the specimens to Kyoto(Japan), Shanghai(China) and Harbin(China) for a period of 3 months. Weight change and mechanical properties of degraded KUNCs in former three geographic positions in terms of tensile, flexural, impact and fracture toughness were measured instrumentally for ageing effect discussion and comparison. As expected, the aged specimens in those different positions all showed the dropped mechanical properties with weight increasing in varying degrees. Furthermore, the result of degradation level comparison among different positions revealed the positive correlation between increased weight percentages and dropped mechanical properties. In other words, dropped mechanical properties of the degraded composites with increasing weight were attributed to the effect of water, which deteriorates the interfacial properties of composites.

scholarly journals Investigating Mechanical Properties of Carbon Glass Jute Fiber based Composite

2021 ◽  
Vol 23 (06) ◽  
pp. 923-931
Author(s):  
Sami Hamid ◽  
◽  
Abhishek Thakur ◽  
Keyword(s):  
Mechanical Properties ◽  
Natural Fiber ◽  
Hybrid Composites ◽  
Fiber Composite ◽  
Tensile Modulus ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Test Procedures ◽  
Additional Material ◽  
Reinforced Polymer

Hybrid composites are made by combining natural and synthetic fibers with an effective matrix, which usually means they’ve received additional strengthening, such as epoxy, to create the additional material properties you can’t obtain on their own. To attain the desirable tensile modulus, compressive modulus, and so on, a fiber composite needs to be added to the FRP (Fiber Reinforced Polymer). Polymer matrix composites are light and cost-effective to manufacture, but they still friendly to the environment and have viable applications, which is why they are often used in various commercial applications. Unidirectional fibers and bidirectionally reinforced with epoxy (SikaDur is a composite medium) carbon fibers are two-way reinforced with unidirectional (use unidirectional) Before we developed test procedures for preparing the test specimens, the testing lab implemented the layup method according to ASTM standards. Ten separate stacking sequences were tested and four different intensity sequences were used in testing the compressive structures according to ASTM D15. The results of the study indicate that hybridization helps natural fiber-reinforced polymer composites to increase their mechanical properties We would use natural fibers rather than synthetic ones since the natural ones make comparable strength when hybridized with synthetic ones.

scholarly journals An Unconventional Approach for Analyzing the Mechanical Properties of Natural Fiber Composite Using Convolutional Neural Network

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Govindaraj Ramkumar ◽  
Satyajeet Sahoo ◽  
G. Anitha ◽  
S. Ramesh ◽  
P. Nirmala ◽  
...  
Keyword(s):  
Neural Network ◽  
Mechanical Properties ◽  
Convolutional Neural Network ◽  
Natural Fiber ◽  
Fiber Composite ◽  
Ground Truth ◽  
Fiber Composites ◽  
Natural Fiber Composites ◽  
Training Process ◽  
Natural Fiber Composite

Over the past few years, natural fiber composites have been a strategy of rapid growth. The computational methods have become a significant tool for many researchers to design and analyze the mechanical properties of these composites. The mechanical properties such as rigidity, effects, bending, and tensile testing are carried out on natural fiber composites. The natural fiber composites were modeled by using some of the computation techniques. The developed convolutional neural network (CNN) is used to accurately predict the mechanical properties of these composites. The ground-truth information is used for the training process attained from the finite element analyses below the plane stress statement. After completion of the training process, the developed design is authorized using the invisible data through the training. The optimum microstructural model is identified by a developed model embedded with a genetic algorithm (GA) optimizer. The optimizer converges to conformations with highly enhanced properties. The GA optimizer is used to improve the mechanical properties to have the soft elements in the area adjacent to the tip of the crack.

Sign in / Sign up

Export Citation Format

Share Document