Effect of Alkali Treatment on Crystalline Structure of Cellulose Fiber from Mendong (&lt;i&gt;Fimbristylis globulosa&lt;/i&gt;) Straw

Suryanto, Heru; Marsyahyo, Eko; Irawan, Yudy Surya; Soenoko, Rudy

doi:10.4028/www.scientific.net/kem.594-595.720

Cited by 45 publications

(28 citation statements)

References 15 publications

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“…Lignin is mainly comprised of ether bonds, while hemicellulose is distinguished by the presence of carboxyl groups (Taherzadeh and Karimi 2008). The disappearance of hemicellulose after the alkali treatment was seen in the 1730 cm -1 region, while the absence of the C-O stretching in lignin was seen at approximately 1263 cm -1 after the alkali treatment of PKS (Suryanto et al 2014). The intensity of the ether (C-O-C) functional groups comprising the hemicellulose and the lignin complex at 1036 cm -1 also were diminished following the alkali treatment, demonstrating that delignification occurred after the silane treatment of PKS.…”

Section: Ftir Spectroscopymentioning

confidence: 99%

A Study on the Curing Characteristics, Tensile, Fatigue, and Morphological Properties of Alkali-Treated Palm Kernel Shell-Filled Natural Rubber Composites

Daud¹,

Ismail²,

Bakar³

2017

BioResources

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Effects of alkali treatment of palm kernel shells (PKS) were investigated relative to curing characteristics, tensile properties, and fatigue of PKSfilled natural rubber (NR) composites. The PKS powder was subjected to alkali treatment using 5% sodium hydroxide. The treated PKS was incorporated into the NR composites during compounding, with the concentrations of the composites ranging from 5 to 20 phr. The properties of treated PKS-filled NR composites were compared with those of untreated PKS-filled NR composites. The cure times, scorch times, and maximum torque values were all lower for alkali-treated PKS/NR composites compared with those of untreated PKS/NR composites. Tensile strength and elongation at break were higher for treated PKS composites, while the moduli (M100 and M300) were lower than those of untreated PKS/NR composites. The fatigue tests for treated PKS/NR composites also showed higher fatigue values than the untreated PKS/NR composites. Scanning electron microscopy revealed that the higher tensile strength, elongation at break, and fatigue values of treated PKS/NR composites were due to the removal of hemicellulose and lignin in PKS fillers. This removal increased in the surface roughness of the filler and led to improved rubber-filler adhesion.

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Section: Ftir Spectroscopymentioning

confidence: 99%

A Study on the Curing Characteristics, Tensile, Fatigue, and Morphological Properties of Alkali-Treated Palm Kernel Shell-Filled Natural Rubber Composites

Daud¹,

Ismail²,

Bakar³

2017

BioResources

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“…The cementing materials like amorphous region and cellulose structure is interacting with alkali and getting eroded. Thus interfibrillar regions gets less dense, rigid and rearrangement of fibrils happens by themselves and also the crystallinity index of the mercerized CIF increases slightly as a result of mercerization [23]. Figure 7 shows the tensile strength variation for the increased fiber volume fraction of different length of fiber reinforcements.…”

Section: X-ray Diffraction Analysis Of Cifmentioning

confidence: 99%

Investigation on the tensile and flexural behavior of coconut inflorescence fiber reinforced unsaturated polyester resin composites

Karthik¹,

Arunachalam²

2020

Mater. Res. Express

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Natural fibers as reinforcement with polymer matrix have gained more advantage owing to its low density, high specific properties, biodegradability and abundant availability. In this connection an investigation has been carried out to make use of a newly identified natural fiber named coconut inflorescence fiber to reinforce with polyester resin. The natural fiber after extraction is subjected to mercerization treatment and the effect of mercerization on the surface of CIF was studied by FTIR and XRD analysis. FTIR spectrum analysis revealed the removal of functional groups present in the natural fiber owing to mercerization of CIF. XRD analysis shows improvement in crystalline size and crystalline index of the CIF as a result of mercerization. Samples of CIF/polyester composites were prepared by varying the length of the fiber as 10, 30, 50, 70 and 100 mm to be reinforced with different volume fractions of fiber/polyester resin as 10, 15, 20, 25 and 30% respectively and the specimens were cut as per ASTM standards for testing. Further samples were taken for testing of tensile strength and flexural strength. Results showed fiber length played a predominant role for the increase in tensile and flexural strength of the composites for 25% volume fraction. SEM analysis was done to predict the effect of fracture behaviour of the composite specimen.

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“…Mendong straw was selected in the range of 5 to 6 months old planting. The mendong fibers contain 20.2% hemicellulose, 72.14% cellulose, 3.44% lignin, and degree of crystalline of 70.7% [8]. Mendong fiber has both tensile strength and stiffness modulus were of 452 MPa and 17 GPa, respectively [6].…”

Section: A Materialsmentioning

confidence: 99%

Critical Fiber Length of Mendong Fiber in Epoxy Matrix Composite

Suryanto¹

2017

Proceedings of the 1st International Conference on Vocational Education and Training (ICOVET 2017)

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Abstract-the disposal of synthetic fiber is very difficult to be degraded and cause problems in the environment. The renewable materials have potency as an alternative material for replacing the synthetic material in the composite product. This study was to determine the critical fiber length of mendong fiber embedded in the epoxy composite. The methods were the extraction of mendong fiber from straw, pull out test methods, and morphology analysis of pull out a test using scanning electron microscope. Results show that mendong fiber had a shear strength of 11 MPa and indicated a critical fiber length of 630 µm. The low critical fiber length of mendong embedded in epoxy matrix indicate good adhesion properties of mendong in an epoxy matrix. It recommends that mendong fibers can apply as reinforcement in the epoxy composite in the form of short fiber.

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Effect of Alkali Treatment on Crystalline Structure of Cellulose Fiber from Mendong (<i>Fimbristylis globulosa</i>) Straw

Cited by 45 publications

References 15 publications

A Study on the Curing Characteristics, Tensile, Fatigue, and Morphological Properties of Alkali-Treated Palm Kernel Shell-Filled Natural Rubber Composites

A Study on the Curing Characteristics, Tensile, Fatigue, and Morphological Properties of Alkali-Treated Palm Kernel Shell-Filled Natural Rubber Composites

Investigation on the tensile and flexural behavior of coconut inflorescence fiber reinforced unsaturated polyester resin composites

Critical Fiber Length of Mendong Fiber in Epoxy Matrix Composite

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