Effect of Pretreatment on Properties of Coir-Based Green Composite

Asasutjarit, Chanakan; Charoenvai, Sarocha; Hirunlabh, Jongjit; Khedari, Joseph

doi:10.4028/www.scientific.net/amr.47-50.678

Cited by 9 publications

(4 citation statements)

References 7 publications

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“…Fonseca et al [ 99 ] compared the fiber washing treatment with three other treatments, such as hornification, alkaline treatment with NaOH, and hybridization. Hornification consists of the application of ten cycles of wetting/drying, as performed by [ 121 ]. The hybridization process consisted of a combination of the chemical and physical treatment of the fiber, such as the washing in hot water, followed by treatment with NaOH and an application of a 5% hydrogen peroxide solution for 3 h in a fiber solution ratio of 1:20 [ 99 ].…”

Section: Why Are Natural Fibers Treated For Application In Cementitio...mentioning

confidence: 99%

A Review of the Use of Natural Fibers in Cement Composites: Concepts, Applications and Brazilian History

Rocha¹,

Júnior²,

Marvila³

et al. 2022

Polymers

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The use of natural lignocellulosic fibers has become popular all over the world, as they are abundant, low-cost materials that favor a series of technological properties when used in cementitious composites. Due to its climate and geographic characteristics, Brazil has an abundant variety of natural fibers that have great potential for use in civil construction. The objective of this work is to present the main concepts about lignocellulosic fibers in cementitious composites, highlighting the innovation and advances in this topic in relation to countries such as Brazil, which has a worldwide prominence in the production of natural fibers. For this, some common characteristics of lignocellulosic fibers will be observed, such as their source, their proportion of natural polymers (biological structure of the fiber), their density and other mechanical characteristics. This information is compared with the mechanical characteristics of synthetic fibers to analyze the performance of composites reinforced with both types of fibers. Despite being inferior in tensile and flexural strength, composites made from vegetable fibers have an advantage in relation to their low density. The interface between the fiber and the composite matrix is what will define the final characteristics of the composite material. Due to this, different fibers (reinforcement materials) were analyzed in the literature in order to observe their characteristics in cementitious composites. Finally, the different surface treatments through which the fibers undergo will determine the fiber–matrix interface and the final characteristics of the cementitious composite.

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Section: Why Are Natural Fibers Treated For Application In Cementitio...mentioning

confidence: 99%

A Review of the Use of Natural Fibers in Cement Composites: Concepts, Applications and Brazilian History

Rocha¹,

Júnior²,

Marvila³

et al. 2022

Polymers

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“…Thus the boiling process enhances the chemical stability to improve performance and durability of the coconut coir material. In addition, the boiled and washed coir of cement boards had higher average modulus of rupture than cement boards prepared with washed coir or coir that had not been washed and boiled (non-pretreatment) 3 . Although the boiling process improves the mechanical properties of the coir, it decreases the adsorption capacity and should therefore be limited to more than 0.5 h.…”

Section: Energy Dispersive X-ray Spectroscopymentioning

confidence: 99%

“…A large amount of coconut coir (0.41 million tonnes/year) is still not used for good purposes. Thus, many researchers are searching for alternative uses of coconut coir as a building material [2][3][4] . Dried coconut coir and durian can also be used as a desiccant for air conditioning 5,6 .…”

Section: Introductionmentioning

confidence: 99%

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Rawangkul¹,

Khedari²,

Hirunlabh³

et al. 2010

ScienceAsia

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The objective of this paper is to investigate the use of coconut coir (Cocos nucifera) as a desiccant for moisture adsorption in an engineering process. The physical, thermal, chemical, and adsorptive properties of un-boiled, 0.5 h, and 1 h boiled dried coconut coir were analysed. Coconut coir surface characteristics were examined by scanning electron microscope and pore size distribution and surface area were examined by mercury porosimeters. Chemical composition has been investigated using energy dispersive X-ray spectroscopy. Moisture adsorption isotherms of dried coconut coir were determined by the static method. Measurements of heat capacity revealed that boiling the coconut coir decreases the specific heat capacity from 4.33 to 3.83 kJ/kg K at 75°C. Boiling, however, decreases the adsorption efficacy. The recommended time for boiling should be limited to no more than half an hour. The study confirmed the feasibility of using coconut coir as a desiccant.

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“…Abaca [15, 16] and coir [17–20] are quite new in reinforcing thermoplastics compared to other natural fibers. Coir fiber is also a natural fiber and obtained from the outer shell or husk of the coconut, the fruit Cocus nucifera , a tropical plant of the Arecaceae (palmae) family.…”

Section: Introductionmentioning

confidence: 99%

A comparative study on the mechanical and degradation properties of plant fibers reinforced polyethylene composites

Zaman

Khan

2011

Polymer Composites

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Coir and abaca fiber‐reinforced linear low density polyethylene (LLDPE) composites (30 wt% fiber) were prepared by compression molding. Coir and abaca fibers were treated with methyl methacrylate (MMA) using ultraviolet radiation to improve the mechanical properties of the composites. Concentration of MMA and radiation dose was optimized. It was found that 30% MMA in methanol along with photoinitiator Darocur‐1173 (2%) and 15th pass of radiation rendered better performance. Chemically treated fiber‐reinforced specimens yielded better mechanical properties compared to the untreated composites, whereas coir fiber composites had better mechanical properties than abaca fiber reinforced ones. For the improvement of the properties, optimized coir (coir fiber treated with 30% MMA) and abaca (abaca fiber treated with 40% MMA) fibers were again treated with aqueous starch solution (2%–8%, w/w) for 2–7 min. Composites made of 3%‐starch‐treated coir fiber (5 min soaking time) showed the best mechanical properties than that of abaca‐fiber‐based composites. Water uptake and soil degradation tests of the composites were also performed. POLYM. COMPOS., 2011. © 2011 Society of Plastics Engineers

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Effect of Pretreatment on Properties of Coir-Based Green Composite

Cited by 9 publications

References 7 publications

A Review of the Use of Natural Fibers in Cement Composites: Concepts, Applications and Brazilian History

A Review of the Use of Natural Fibers in Cement Composites: Concepts, Applications and Brazilian History

Untitled

A comparative study on the mechanical and degradation properties of plant fibers reinforced polyethylene composites

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