Effect of ionizing and non-ionizing preirradiations on physico-mechanical properties of coir fiber grafting with methylacrylate

Zaman, Haydar U.; Khan, Mubarak A.; Khan, Ruhul A.; Ghoshal, Sushanta

doi:10.1007/s12221-012-0593-y

Cited by 9 publications

(4 citation statements)

References 25 publications

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“…Some of the characteristics of the fiber have been studied in our previous works. 18,19 Coir is mainly a multicellular fiber which contains 30À300 or more cells in its cross section. Cells in natural fiber like coir refer to the crystalline cellulose arranged helically in a matrix consisting of a noncrystalline celluloseÀlignin complex.…”

Section: Introductionmentioning

confidence: 99%

Preparation, structure, and properties of the coir fiber/polypropylene composites

Zaman

Beg

2013

Journal of Composite Materials

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Coir fiber-reinforced polypropylene-based unidirectional composites were prepared by compression molding. Mechanical properties like tensile strength, tensile modulus and impact strength of the resulting composites were found to be increasing with increase in the loading of coir fibers, reached an optimum and thereafter decreased with further increase in fiber loading. Based on fiber loading, 30 wt% fiber-reinforced composites had the optimum set of mechanical properties. After alkali treatment of coir fiber, tetramethoxy orthosilicate treatment was conducted to promote adhesion between coir fiber and polypropylene matrix. Treatment of the coir fiber with tetramethoxy orthosilicate after the alkali pre-treatment enhanced the mechanical properties and water desorption of the resultant composites, resulting from the improved adhesion between the coir fiber and polypropylene matrix. These results were also confirmed by the scanning electron microscope observations of tensile fracture surfaces of coir fiber/polypropylene composites. The interfacial shear strength of the composites was also measured using a single-fiber fragmentation test and a microbond test.

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Section: Introductionmentioning

confidence: 99%

Preparation, structure, and properties of the coir fiber/polypropylene composites

Zaman

Beg

2013

Journal of Composite Materials

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“…Surface modifications of NFs have improved the mechanical properties of composites, as several workers have recently reported. 15–18…”

Section: Introductionmentioning

confidence: 99%

“…Surface modifications of NFs have improved the mechanical properties of composites, as several workers have recently reported. [15][16][17][18] In this present study, coir fiber was used as the reinforcing agent and PP was used as the polymer matrix for polymer composites to reduce the content of synthetic PP keeping in mind the environmental consciousness. PP was chosen as the matrix of the composite because it has low specific density, excellent and desirable mechanical, physical, and thermal properties when used in normal temperature applications, and takes a large part in wood plastic composite markets.…”

Section: Introductionmentioning

confidence: 99%

The improvement of physicomechanical, flame retardant, and thermal properties of lignocellulosic material filled polymer composites

Zaman

Khan

Chowdhury

2021

Journal of Thermoplastic Composite Materials

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In this study, the effects of alkali and silane coupling agents and coir fiber (CF) loading on the fundamental properties of the CF-filled polypropylene (PP) composites were investigated. Mechanical properties of the PP/CF composites, such as tensile strength, tensile modulus, impact strength, and water absorption were increased by the increase of the CF loading. The inclusion of 3-aminopropyl trimethoxy silane (ATS) and tetramethoxy orthosilicate (TOS) after the alkali pretreatment for the CF increased all the mechanical properties and water desorption of the resulting composites. This trend was more evident with the increase in CF loading. The best results were obtained for PP/TOS composites as compared to other composites. SEM images of fractured samples show improved adhesion between CF and PP matrix after treatment with ATS and TOS. The horizontal rate of combustion is significantly reduced with the inclusion of Mg(OH)2 in PP/ATS and PP/TOS composites. DSC results show improved crystallization temperature, melting temperature, and melting enthalpy as compared with virgin PP. The addition of ATS and TOS after the alkali pretreatment improved the thermal stability of the resultant composites. TOS-modified CF composites showed better resistance than ATS-modified CF composites in water medium.

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“…The swelling of cellulose fibers is impacted by alkali treatment, which causes cellulose to change its structure to one that is thermodynamically more stable than the original structure [25]. Alkali-treated wood fibers' subsequent chemical treatment with silane would improve the fibers' adherence to the polymer matrix in wood plastic composites [26][27][28][29]. By the creation of silanol (Si-OH) and the formation of bonds between siloxane (Si-O-Si) and natural fibers, the hydrophilic surface of the wood fibers is changed to a hydrophobic surface at this stage [30].…”

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confidence: 99%

Preparation and Testing of Bast Fiber Reinforced Thermoplastic Composites under Chemical Treatment

Zaman,

Khan

2023

IJASE

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INTRODUCTIONNatural fiber composites (NFs) have recently seen a significant increase in interest [1][2][3][4][5]. Due to their high toughness, high specific characteristics, light weight, recyclability, low cost, and "eco-friendliness," NFs including vetiver, calotropis gigantea, abaca, snake grass, etc. are currently widely employed to produce composites [6, 7]. Hydrophobic thermoplastics are inherently incompatible with these fibers. Plant fiber reinforced thermoplastic composites, despite significant flaws in industrial packaging and performance for sheet work, fences, furniture, and building, are becoming more and more appealing [8, 9]. Haydar and colleagues' extensive study on NF composites has shown that they are a fantastic alternative to synthetic materials [10][11][12][13][14].Calotropis gigantea fiber (CGF) is known as bast fiber. We selected CGF because it is an oil-absorbing component used in the oil separation process to remove oil from water and has suitable buoyancy, hydrophobic-oleophilic properties, a high oil absorption capacity, and an oil-water separation efficiency. CGF inhabits China, India, Bangladesh, among other countries, and is a member of the Asclepiadaceae family. As a raw material with inherent biodegradability, CGF is mostly used in the textile industry. Calotropis produces a hardy fabric that can be used for fishing nets, ropes, carpets, and sewing thread.This tree can reach heights of 3 to 5 meters and produces clusters of waxy blooms. It also has milky-tasting stalks with oval-shaped pale green leaves that are further supplemented by fibers. For the creation of composite materials, the fibers extracted from the CG plant's stems are employed. Extract CG bark fiber has a composition of 73.8 percent ABSTRACT: Thermoplastic polypropylene (PP) composites containing 10, 20, 30, and 40% wt% of calotropis gigantea fiber (CGF) were created in the current study using compression molding in the presence of alkaline pretreated CGF (ACGF), which was modified with aminopropyltrimethoxy silane (ACGF/AS) and tetramethoxyorthosilicate (ACGF/TS) as a silane coupling agent. The composites' CGF content has been tuned, and a 40 weight percent CGF content exhibited the optimum mechanical performance. In comparison to virgin PP, composites containing 40% CGF increased their impact strength and tensile strength by 225.4% and 54.2%, respectively, but only 39% when using 30% CGF. After alkali pretreatment, silane is added to CGF/PP composites to improve the mechanical properties, which in turn cause the composites to absorb water. The increase in CGF content has made this tendency more obvious. When compared to CGF/PP composites, which demonstrated 18% tensile modulus and 59% impact strength, ACGF/TS/PP composites showed maximal mechanical characteristics at 40 wt% CGF content, while CGF/PP composites only managed 20% tensile strength at 30% CGF content. To find out more about fiber-matrix adhesion, SEM revealed enhanced adhesion between CGF and PP following silane modification. The horizontal combustion ...

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Effect of ionizing and non-ionizing preirradiations on physico-mechanical properties of coir fiber grafting with methylacrylate

Cited by 9 publications

References 25 publications

Preparation, structure, and properties of the coir fiber/polypropylene composites

Preparation, structure, and properties of the coir fiber/polypropylene composites

The improvement of physicomechanical, flame retardant, and thermal properties of lignocellulosic material filled polymer composites

Preparation and Testing of Bast Fiber Reinforced Thermoplastic Composites under Chemical Treatment

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