Effect of Alkalization on Mechanical and Moisture Absorption Properties of Azadirachta indica (Neem Tree) Fiber Reinforced Green Composites

Ramesh, M.; Deepa, C.; Aswin, U.S.; Eashwar, H.; Mahadevan, B; Murugan, Divagar

doi:10.1007/s12666-016-0874-z

Cited by 50 publications

(17 citation statements)

References 25 publications

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“…The mechanical properties of J-G FRE and polyester resins composites in dry and wet condition was investigated. From experimental tests the following conclusions have been drawn from the study:  The minimum impact strength, tensile strength, flexural strength and hardness of J-G FRE resin composite after 30 days of water absorption is 0.19J/mm 2 Tech projects and currently guiding one PhD student. He has 40 publications to his credit in highly reputed international journals along with 20 publications in proceedings of national and international conferences.…”

Section: Discussionmentioning

confidence: 93%

Degradation of Mechanical Properties of Hybrid Reinforcement with Epoxy-Polyester Matrix Under Water Absorption

Swarnalatha*,

Gupta,

Kaviti

2020

IJRTE

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Natural fiberss represent a good renewable and biodegradable alternative the.. most common man-made reinforcement. Among various fibers, natural fibers are used due to their advantages, easy availability, low density, low production cost and better mechanical properties. The aim of this work is to study the degradation of hybrid composites when exposed to moisture condition at room temperature. Hand lay-up method is used to prepare the laminates with the J-G FRP and epoxy matrix. Water absorption test is carried out by immersing the specimen in water tub at room temperature for different time periods. Mechanical properties.. like Tensile strength, Flexural strength, Impact strength and Hardness are evaluated by performing different tests on laminates. The mechanicall properties of water immersed specimen were tested and compared with dry samples as per the ASTM standard. The composites specimens with J-G FRE matrix absorbs less amount of water when compared to polyester specimens. Equilibrium moisture content and water absorption curves were determined. J-G FRE matrix composite was found to have less water absorption and decreased impact strength is 0.19J / mm2, decreased tensile strength is 61.11MPa, decreased flexural strength is 31.29MPa and decreased stiffness is 13HN compared to J-G FRP matrix composite.

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Section: Discussionmentioning

confidence: 93%

Degradation of Mechanical Properties of Hybrid Reinforcement with Epoxy-Polyester Matrix Under Water Absorption

Swarnalatha*,

Gupta,

Kaviti

2020

IJRTE

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“…The results of inter-planar spacing were opposite to those of crystal size, and inter-planar spacing increased after the modification. The results indicate that after alkali treatment, PET chains in crystalline regions are partly broken and form smaller microcrystals [21]. TMPP-modified PET fiber exhibited the smallest crystal size among these samples because effective coating of TMPP on PET fiber promoted the interactions among functional groups present on the surface of PET fiber and TMPP.…”

Section: Resultsmentioning

confidence: 99%

Surface Modification of PET Fiber with Hybrid Coating and Its Effect on the Properties of PP Composites

Mao

2019

Polymers

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Surface modification fundamentally influences the morphology of polyethylene terephthalate (PET) fibers produced from abandoned polyester textiles and improve the compatibility between the fiber and the matrix. In this study, PET fiber was modified through solution dip-coating using a novel synthesized tetraethyl orthosilicate (TEOS)/KH550/ polypropylene (PP)-g-MAH (MPP) hybrid (TMPP). The PET fiber with TMPP modifier was exposed to the air. SiO2 particles would be hydrolyzed from TEOS and become the crystalline cores of MPP. Then, the membrane formed by MPP, SiO2 and KH550 covered the surface of the PET fiber. TMPP powder was investigated and characterized by fourier transform infrared spectroscopy, scanning electron microscope (SEM) and thermogravimetric analysis (TGA). TMPP-modified PET fiber was researched by X-ray diffraction and SEM. Furthermore, tensile strength of single fiber was also tested. PET fiber/PP composites were studied through dynamic mechanical analysis and SEM. Flexural properties of composites were also measured. The interfacial properties of PET fiber and PP matrix were indirectly represented by contact angle analysis. Results showed that the addition of TEOS is helpful in homogenizing the distribution of PP-g-MAH. Furthermore, TMPP generates an organic-inorganic ‘armor’ structure on PET fiber, which can make up for the damage areas on the surface of PET fiber and strengthen each single-fiber by 14.4%. Besides, bending strength and modulus of TMPP-modified PET fiber-reinforced PP composite respectively, increase by 10 and 800 MPa. The compatibility between PET fiber and PP was also confirmed to be increased by TMPP. Predictably, this work supplied a new way for PET fiber modification and exploited its potential applications in composites.

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“…Nonwoven jute (400 gsm) and woven jute fabrics were treated with mild alkali solution (2%) for 2 h followed by washing in water and drying for 5 h at room temperature to activate the hydroxyl groups of cellulose by breaking the intramolecular hydrogen bonding in between cellulose of jute. [ 3, 11 ] About 200 g of soy seeds were taken and soaked in 800 ml distilled water for 5 h. Water‐soaked soy seeds were crushed by using a mixer grinder and squeezed by a nylon cloth to get the soymilk. The solid content of soymilk, derived from 100 ml of soymilk, was found to be 22%.…”

Section: Methodsmentioning

confidence: 99%

“…[ 1 ] There are reports on development of natural fiber reinforced sustainable composite, which can provide an alternative solution to the above problem. [ 2–10 ] Ramesh et al, developed both untreated and alkali treated neem fiber reinforced polyester composites; the later showed maximum tensile strength of 68.76 MPa due to the mercerization of neem fiber. The alkalization also improved other mechanical properties as well as moisture retention capacity of the composite compared to untreated neem fiber reinforced composite.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and biodegradation analysis of fully biodegradable eco‐friendly natural fiber reinforced sapling pot

et al. 2021

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In this work, eco‐friendly biodegradable nonwoven and woven jute‐based soy composites were fabricated. As cellulose of jute and protein part of water‐based soy resin have requisite functional groups to bind chemically and produce mechanically strong composite, hence tensile and flexural strength of developed jute composite were measured and found to be 48.8 and 42.5 MPa, respectively as optimum. Water absorption, impact strength, fire retardancy, and soil burial degradation of developed composites were carried out. Sapling pots were fabricated and their environmental degradation study was executed by growing sapling. Weight loss, spectral, and morphology analysis after biodegradation of sapling pots revealed that developed samples are completely biodegradable in nature. Hence, this innovation can be an alternate to harmful plastic‐based composite/sapling pot and other ceramic‐based sapling pots to keep our environment free of pollution.

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Effect of Alkalization on Mechanical and Moisture Absorption Properties of Azadirachta indica (Neem Tree) Fiber Reinforced Green Composites

Cited by 50 publications

References 25 publications

Degradation of Mechanical Properties of Hybrid Reinforcement with Epoxy-Polyester Matrix Under Water Absorption

Degradation of Mechanical Properties of Hybrid Reinforcement with Epoxy-Polyester Matrix Under Water Absorption

Surface Modification of PET Fiber with Hybrid Coating and Its Effect on the Properties of PP Composites

Mechanical and biodegradation analysis of fully biodegradable eco‐friendly natural fiber reinforced sapling pot

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