Bioremediation of Natural Fiber by Graft Copolymerization

Chauhan, Ashish; Kaith, Balbir Singh

doi:10.4172/2157-7048.s6-002

Cited by 6 publications

(7 citation statements)

References 23 publications

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“…The performance and quality of the composite product highly depend on fiber matrix adhesion because it influences the stress transfer from the matrix to the fiber. Researchers have reported modifications of the roselle fiber to improve the fiber/matrix interfacial bonding for fabrication of polymer composites for different applications . In addition, review papers covering the chemical and mechanical properties of roselle fibers in polymer composites have been published .…”

Section: Introductionmentioning

confidence: 99%

The effects of chemical treatment on the structural and thermal, physical, and mechanical and morphological properties of roselle fiber‐reinforced vinyl ester composites

et al. 2016

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Roselle fiber is a type of natural fiber that can potentially be used as a reinforcement material in polymer composites for different applications. This study investigated the chemical, physical, thermal, mechanical, and morphological characteristics of roselle fiberreinforced vinyl ester subjected to different fiber treatments. The roselle fiber was treated with alkalization and a silane coupling agent, and samples were prepared using the hand lay-up method. Treated roselle fiber significantly enhanced most of the properties of vinyl ester biocomposites compared with an untreated biocomposite. The results revealed that alkalization and silane treatment of the fiber changed its chemical properties. The treated fiber improved water repellence behavior of the roselle fiber-reinforced vinyl ester compared with the untreated fiber. Use of a silane coupling agent was determined as the best chemical treatment for the water absorption effect. Thermogravimetric analysis (TGA) demonstrated that alkalization-treated fiber had improved thermal stability; however, the opposite result was obtained with the silane-treated fiber. The morphological examination of treated and untreated roselle fiber-reinforced vinyl esters showed a good fiber adhesion between the treated fiber and the matrix, and less fiber pull-out from the matrix was observed. This observation provides good indication of the interfacial interlocking between the fiber and the matrix, which improved the tensile properties of the composites. In contrast, the impact results revealed that the treated fiber had a decreased impact energy compared with the untreated fiber. POLYM. COMPOS.,

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Section: Introductionmentioning

confidence: 99%

The effects of chemical treatment on the structural and thermal, physical, and mechanical and morphological properties of roselle fiber‐reinforced vinyl ester composites

et al. 2016

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“…Generally aqueous ceric ion initiations are performed under acidic conditions to promote higher concentration of Ce(IV) [ 22 , 23 ]. Sadeghi et al , studied on polymethacrylamide grafted onto carboxymethyl cellulose (CMC) backbone in a homogeneous solution using a ceric ammonium nitrate (CAN) as an initiator and water as solvent [ 24 ].…”

Section: Methodsmentioning

confidence: 99%

“…However, these parameters were observed to decrease at much higher concentrations (>3 M). Evidence of hydrolysis shows that the grafted copolymers could be used as flocculants [ 24 ]. Singh V et.al 2007, have synthesised Starch-g-poly(acrylonitrile)Using a very low concentration of potassium persulfate as initiator, acrylamide could be efficiently grafted onto starch under microwave irradiation and for the grafting O 2 removal from the reaction vessel was not required [ 64 ].…”

Section: Methodsmentioning

confidence: 99%

A Review on the Modification of Polysaccharide Through Graft Copolymerization for Various Potential Applications

Kumar¹,

Pandey²,

Raj³

et al. 2017

TOMCJ

104

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Introduction:Graft copolymerization is one of the most promising technique uses to modify the properties of naturally available polymers with a minimum loss in their native characteristics. Methods and Materials:Graft copolymerization is a very significant technique to add hybrid properties in backbone of polymers. The grafting generally initiated through the formation of free radical centers on the polymer backbone as well as monomer. Results:Grafted polysaccharides have various applications in different important scientific areas such as drug delivery, pharmaceutical field, plastic industry, waste water treatment, tannery effluent treatment, textile industry, agriculture area, etc. all of this fascinated us to summarize the major research articles over the last two decades outlining different methods of grafting, surface modification, graft copolymerization of synthetic and natural polymers. Conclusion:Various redox initiator systems viz. Ceric ammonium nitrate, per sulfate, Irradiation, FAS-H2O2 etc. is also explored for grafting of vinyl through conventional and non-conventional techniques.

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“…Weak chemical properties of chitosan can be overcome by surface modification/chemical treatments [12] to articulate -NH 2 /-OH proactive groups for dyes adsorption [13] or metal complextion/diffusion in accessible pore size [14]. In this contest, graphite's hexagonal layers that are well-utilized in heat-resistant/reinforced material [15,16] were exploited to yield inter-wined binary composite for Cr(VI) removal are developed.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of hexavalent chromium by graphite–chitosan binary composite

Dongre

2016

Bull Mater Sci

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Graphite chitosan binary (GCB) composite was prepared for hexavalent chromium adsorption from studied water. GCB was characterized by TGA, FTIR, SEM and X-ray diffraction techniques. Wide porous sorptive surface of 3.89 m 2 g −1 and absorptive functionalities of GCB was due to 20% (w/w) graphite support on chitosan evidenced from FTIR and SEM that impart maximum adsorption at pH 4, agitation with 200 rpm for 180 min. Adsorption studies revealed intraparticle diffusion models and best-fitted kinetics was pseudo 2nd order one. A wellfitted Langmuir isotherm model suggested monolayer adsorption with an adsorption capacity (q m ) of 105.6 mg g −1 and R 2 = 0.945. Sorption mechanisms based on metal ionic interactions, intrusion/diffusion and chemisorptions onto composite. This graphite chitosan binary composite improve sorbent capacity for Cr(VI).

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Bioremediation of Natural Fiber by Graft Copolymerization

Cited by 6 publications

References 23 publications

The effects of chemical treatment on the structural and thermal, physical, and mechanical and morphological properties of roselle fiber‐reinforced vinyl ester composites

The effects of chemical treatment on the structural and thermal, physical, and mechanical and morphological properties of roselle fiber‐reinforced vinyl ester composites

A Review on the Modification of Polysaccharide Through Graft Copolymerization for Various Potential Applications

Adsorption of hexavalent chromium by graphite–chitosan binary composite

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